S-882Z Series www.sii-ic.com ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 (c) Seiko Instruments Inc., 2005-2010 The S-882Z Series is a charge pump IC for step-up DC-DC converter startup, which differs from conventional charge pump ICs, in that it uses fully depleted SOI (Silicon on Insulator) technology to enable ultra-low voltage operation. Being capable of stepping up an extremely low input voltage of 0.3 to 0.35 V, this series enables the efficient use of very low energy levels. The stepped up electric power is stored in a startup capacitor, and it is discharged as the startup power of the step-up DC-DC converter when the startup capacitor reaches the discharge start voltage level. Moreover, a built-in shutdown function is also provided, so that when the output voltage of the connected step-up DC-DC converter rises above a given value, the operation is stopped, thereby achieving significant power saving and battery life extension. The S-882Z Series chips come in a small SOT-23-5 package, allowing high-density mounting. Features * Operating input voltage * Current consumption * * * * * 0.3 to 3.0 V During operation : 0.5 mA max. (at VIN = 0.3 V) During shutdown : 0.6 A max. (at VIN = 0.3 V) Discharge start voltage 1.8 to 2.4 V (selectable in 0.2 V steps) Shutdown voltage Discharge start voltage + 0.1 V (fixed) Oscillation frequency 350 kHz typ. (at VIN = 0.3 V) *1 External component Startup capacitor (CCPOUT), 1 unit *2 Lead-free, Sn 100%, halogen-free *1. The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the output smoothing capacitor value of the step-up DC-DC converter and the output voltage value. (Refer to Example of Connection with Step-up DC-DC Converter.) *2. Refer to " Product Name Structure" for details. Applications * Stepping up from low-voltage power supply such as solar cell and fuel cell * Stepping up internal power supply voltage of RF tag * Intermittent power supply to intermittently operating system Package * SOT-23-5 Seiko Instruments Inc. 1 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Block Diagram CCPOUT CPOUT 5 *1 VIN 4 Charge pump circuit M1 *1 Oscillation circuit 3 VM *1 VREF - + EN- COMP2 2 *1. Parasitic diode Figure 1 2 OUT COMP1 - + CLK signal VSS 1 Seiko Instruments Inc. *1 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Product Name Structure The discharge start voltage for the S-882Z Series can be selected at the user's request. Refer to "1. Product Name" for the definition of the product name, "2. Package" regarding the package drawings and "3. Product Name List" for the full product names. 1. Product Name S-882Z xx - M5T1 x Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office) Package name (abbreviation) and packing specifications*1 M5T1 : SOT-23-5, tape Discharge start voltage 18 : 1.8 V 20 : 2.0 V 22 : 2.2 V 24 : 2.4 V *1. Refer to the taping specifications at the end of this book. 2. Package Package Name SOT-23-5 3. Drawing Code Tape MP005-A-C-SD Package MP005-A-P-SD Reel MP005-A-R-SD Product Name List Table 1 Discharge Start Voltage Shutdown Voltage Product Name 1.8 V 0.1 V 1.9 V 0.1 V S-882Z18-M5T1x 2.0 V 0.1 V 2.1 V 0.1 V S-882Z20-M5T1x 2.2 V 0.1 V 2.3 V 0.1 V S-882Z22-M5T1x 2.4 V 0.1 V 2.5 V 0.1 V S-882Z24-M5T1x Remark 1. Contact the SII marketing department for products with discharge start voltage other than those specified above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. 3 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Pin Configurations Table 2 SOT-23-5 Top view 5 1 Pin No. Pin Name 4 2 1 2 3 4 5 OUT VSS VM VIN CPOUT Pin Description Output pin (step-up DC-DC converter connection pin) GND pin Step-up DC-DC converter output voltage monitor pin Power supply input pin Startup capacitor connection pin 3 Figure 2 Absolute Maximum Ratings Table 3 (Ta = 25C unless otherwise specified) Parameter VIN pin voltage CPOUT pin voltage OUT pin voltage VM pin voltage Power dissipation Symbol Absolute Maximum Rating Unit VIN VCPOUT VOUT VVM PD VSS - 0.3 to VSS + 3.3 VSS - 0.3 to VSS + 3.3 VSS - 0.3 to VSS + 3.3 VSS - 0.3 to VSS + 3.3 300 (When not mounted on board) 600*1 -40 to +85 -40 to +125 V V V V mW mW C C Operating ambient temperature Topr Storage temperature Tstg *1. When mounted on board [Mounted board] (1) Board size: 114.3 mm x 76.2 mm x t1.6 mm (2) Board name: JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Power Dissipation (PD) [mW] 700 600 500 400 300 200 100 0 0 100 150 50 Ambient Temperature (Ta) [C] Figure 3 Power Dissipation of Package (When Mounted on Board) 4 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Electrical Characteristics Table 4 (Ta = 25C unless otherwise specified) Parameter Discharge start *1 voltage Discharge stop *2 voltage Symbol Conditions VCPOUT1 VIN = 0.35 V VCPOUT2 VCPOUT1(S) = 1.8 V VCPOUT1(S) = 2.0 V VCPOUT1(S) = 2.2 V VCPOUT1(S) = 2.4 V Operating input *3 voltage VIN Oscillation start VST voltage Discharge control switch RM1 resistance Discharge start tOUT delay time*4 Discharge start VCPOUT1 voltage temperature Ta * VCPOUT1 coefficient ISS Current consumption during operation Current ISSS consumption during shutdown Min. Typ. VCPOUT1(S) VCPOUT1(S) - 0.1 VCPOUT1 - - 0.60 VCPOUT1 - - 0.67 VCPOUT1 - - 0.74 VCPOUT1 - - 0.80 VCPOUT1(S) = 1.8 to 2.4 V, Ta = -40 to +85C VCPOUT1(S) = 1.8, 2.0 V, Ta = -30 to +60C Not externally connected, voltage applied to VIN Max. VCPOUT1(S) + 0.1 VCPOUT1 - 0.33 VCPOUT1 - 0.33 VCPOUT1 - 0.33 VCPOUT1 - 0.33 Unit Measurement Circuit V 1 V 1 V 1 V 1 V 1 0.35 - 3.0 V 2 0.30 - 3.0 V 2 - - 0.3 V - VCPOUT = 1.8 to 2.4 V, IOUT = 3 mA - 34 100 3 VIN = 0.35 V, CCPOUT = 10 F - 7 25 s 2 Ta = -40 to +85C - 150 550 ppm/C - VIN = 0.3 V, VCPOUT = 0 V VIN = 0.6 V, VCPOUT = 0 V VIN = 1.0 V, VCPOUT = 0 V VIN = 0.3 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 0.6 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 1.0 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 2.0 V, VCPOUT = 0 V, VVM = 3.0 V - - - - - - - 0.1 0.5 1.2 - - - - 0.5 1.5 3.0 0.6 0.7 0.7 0.8 mA mA mA A A A A 4 4 4 5 5 5 5 VOFF(S) VOFF(S) Shutdown VOFF VOFF(S) V 6 VIN = 0.3 V, VCPOUT = 0 V *5 voltage - 0.1 + 0.1 Shutdown VOFF voltage Ta = -40 to +85C - 150 550 ppm/C - temperature Ta * VOFF coefficient Discharge VIN = VCPOUT = 0 V, ILEAK control switch 0.1 7 - - A *6 V OUT = VVM = 3.0 V leak current VM pin input IVM 1.0 1.9 8 VVM = 3.0 V - A current Oscillation 350 kHz fOSC VIN = 0.3 V - - - frequency *1. VCPOUT1 : Actual discharge start voltage value, VCPOUT1(S) : Discharge start voltage setting value *2. Voltage at which discharge to the OUT pin stops *3. Input voltage required to start discharge to the OUT pin from the startup capacitor *4. Delay time from when power is input to the VIN pin until the electric charge of the startup capacitor is discharged to the OUT pin *5. VOFF : Actual shutdown voltage value (VM pin voltage value at which shutdown actually occurs) VOFF(S) : Shutdown voltage setting value (VM pin voltage setting value at which shutdown occurs) VOFF(S) is automatically set to VCPOUT1(S) + 0.1 V. *6. Current that flows into the IC from the OUT pin due to the off-leak current of the discharge control switch Caution The voltage that is input to the connected step-up DC-DC converter varies according to the consumption current of the step-up DC-DC converter and the power smoothing capacitor. Set the discharge start voltage based on thorough evaluation including the temperature characteristics under the actual usage conditions. Seiko Instruments Inc. 5 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Measurement Circuits 1. VIN CPOUT VM OUT 1 M VSS 1 F V 10 F Figure 4 2. VIN CPOUT VM OUT 1 M VSS 1 F V 10 F Figure 5 3. VIN CPOUT VM OUT IOUT VSS V A Figure 6 4. VIN CPOUT VM A 1 F OUT VSS Figure 7 6 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 5. VIN CPOUT VM A OUT VSS Figure 8 6. VIN CPOUT VM A OUT VSS Figure 9 7. VIN CPOUT VM OUT VSS A Figure 10 8. VIN A CPOUT VM OUT VSS Figure 11 Seiko Instruments Inc. 7 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Operation 1. Basic Operation : IC with 2.0 V Discharge Start Voltage (1) In the S-882Z Series, when power of 0.3 V or higher is input to the VIN pin, the oscillation circuit starts operation with that power, and the CLK signal is output from the oscillation circuit. (2) The charge pump circuit is driven by this CLK signal, and the power of the VIN pin is converted to the stepped up electric power in the charge pump circuit. (3) The stepped up electric power output from the charge pump circuit is gradually charged to the startup capacitor (CCPOUT) connected to the CPOUT pin and the voltage of the CPOUT pin gradually rises. (4) When the CPOUT pin voltage (VCPOUT) reaches or exceeds the discharge start voltage (VCPOUT1), the output signal of the comparator (COMP1) changes from high level to low. As a result, the discharge control switch (M1), which was off, turns on. (5) When M1 switches on, the step up electric power charged to CCPOUT is discharged from the OUT pin. (6) When VCPOUT declines to the level of the discharge stop voltage (VCPOUT2) as the result of the discharge, M1 switches off, and the discharge is stopped. (7) When the VM pin voltage (VVM) reaches or exceeds the shutdown voltage (VOFF), the output signal (EN-) of the comparator (COMP2) changes from low level to high. As a result, the oscillation circuit stops operation and the shutdown state is entered. (8) When VVM does not reach VOFF or more, the stepped up electric power from the charge pump circuit is recharged to CCPOUT. (Retun to the operation specified in (3).) Caution When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is needed to be charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop voltage (VCPOUT2). In this case, set the condition as follows: Condition: Out pin voltage (VOUT)<Discharge stop voltage (VCPOUT2) CCPOUT Charging VIN 4 CPOUT Discharging 5 Charge pump circuit COMP1 - + CLK signal Oscillation circuit VREF EN- - + COMP2 VSS 2 Figure 12 Operation Diagram 8 Seiko Instruments Inc. 1 OUT 3 VM M1 Detection ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 2. Step-up DC-DC Converter Output Voltage Monitor Pin (VM Pin) When the output voltage of the step-up DC-DC converter to be monitored rises and the VM pin voltage (VVM) reaches or exceeds the shutdown voltage (VOFF), the shutdown state is entered. When this happens, the internal oscillation circuit stops its operation, so that the charge pump circuit operation stops, and greatly reduces the power consumption. Figure 13 shows the configuration of the VM pin. Table 5 VM pin + - VM Pin Internal Circuit VVM < VOFF VVM VOFF Operating Shutdown VREF Figure 13 VM Pin Configuration Set VVM during shutdown as follows. VVM VIN + 1.0 V VVM VOUT When VVM < VIN + 1.0 V occurs, the shutdown current consumption increases. When VVM < VOUT occurs, the discharge control switch leak current increases. Caution1. When not using the VM pin, be sure to connect it to the VSS pin. If the VM pin is left open, it may cause malfunctions. 2. Note that the operation to restart a step-up DC-DC converter does not start when CPOUT pin voltage (VCPOUT) exceeds the discharge stop voltage (VCPOUT2) even if the power-off state is released. This operation restarts if VCPOUT is lowered than VCPOUT2 by discharge of a start-up capacitor (CCPOUT). Seiko Instruments Inc. 9 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Selection of Product and Startup Capacitor (CCPOUT) To reliably start up the step-up DC-DC converter, in the S-882Z Series, select the discharge start voltage value (VCPOUT1) and the capacitance value of the external startup capacitor (CCPOUT) according to the step-up DC-DC converter to be started, its external parts, and the output load. Generally, an output smoothing capacitor with a large capacitance value and an output load are connected to the output pin of the step-up DC-DC converter. Therefore, to start up the step-up DC-DC converter thus connected, it is necessary to select a large capacitance value for the startup capacitor. As a reference, the following shows an example that a Schottky diode (SD1) is added between the output pin (OUT) and the power supply pin (VDD) of the step-up DC-DC converter to be started up in the S-882Z Series (refer to Figure 14). As a result, it is possible to start up the step-up DC-DC converter by the capacitor with a small value. CVDD in Figure 14 is the power supply smoothing capacitor of the step-up DC-DC converter. VIN VOUT SD1 CCPOUT CPOUT VIN VDD OUT VIN S-882Z Series Step-up DC-DC converter VM VSS CIN CVDD OUT VSS CL Figure 14 Connection Diagram (Reference) The selection method for VCPOUT1 and CCPOUT when the reference connection shown in Figure 14 has been performed is described below. Select VCPOUT1 and CCPOUT so that they satisfy the following conditional expression. VCPOUT1 * CCPOUT - 0.1 * IVDD - VDDL CCPOUT + CVDD VCPOUT1 > VDDL + 0.2 V * (CCPOUT + CVDD) > 2tS * IVDD CCPOUT > 10CVDD VCPOUT1 : Discharge start voltage value of S-882Z Series (unit : V) CCPOUT : Capacitance value of startup capacitor (unit : F) 10 CVDD : Capacitance value of power smoothing capacitor for step-up DC-DC converter (unit : F) IVDD : Consumption current value of step-up DC-DC converter (unit : mA) VDDL : Minimum operation voltage of step-up DC-DC converter (unit : V) tS : Step-up DC-DC converter startup time Soft start time (unit : ms) Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series If the Schottky diode (SD1) has a large reverse current or if a pull-down resistor is added to the OUT pin of the S-882Z Series, add the current value generated from these to the current consumption (IVDD) of the step-up DC-DC converter. Moreover, if a Schottky diode is added between the OUT pin of the S-882Z Series and the power supply pin (VDD pin) of the step-up DC-DC converter, set VCPOUT1 so that it is higher by the amount corresponding to the forward drop voltage (VF) of the added Schottky diode in comparison to the discharge start voltage value (VCPOUT1) obtained with the above described conditional expression. Cautions 1. The S-882Z Series can start up the step-up DC-DC converter more reliably as the discharge start voltage value (VCPOUT1) and the startup capacitor value (CCPOUT) are larger. However, note that the time from when the input power is input until the step-up DC-DC converter starts becomes longer in this case. 2. In the S-882Z Series, CCPOUT can be more lowered as VCPOUT1 is higher, but note that if VCPOUT1 2.2 V, the minimum value of the operation input voltage (the minimum input voltage value required for power to be output from the OUT pin of the S-882Z Series) rises from 0.3 V to 0.35 V (refer to Table 6). Table 6 Discharge Start Voltage Value Minimum Operation Input Voltage Value Temperature Range 1.8, 2.0 V 1.8 to 2.4 V 0.3 V 0.35 V -30 to +60C -40 to +85C Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Standard Circuit CCPOUT CPOUT VIN OUT S-882Z Series VSS VM Figure 15 Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Seiko Instruments Inc. 11 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Example of Connection with Step-up DC-DC Converter The following are the connection examples based on the set condition. The symbols used in the connection diagram are described in Table 7 below. Table 7 Symbol SD1 CVDD SD2, ROUT R1, R2 1. Description A Schottky diode for preventing a voltage decline in the VDD pin due to output capacitor CL at step-up DC-DC converter startup. The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so that CVDD CCPOUT x 0.1. A Schottky diode and pull-down resistor to prevent the OUT pin voltage of the S-882Z Series from exceeding the absolute maximum rated voltage. Bleeder resistors to prevent the VM pin voltage of the S-882Z Series from exceeding the absolute maximum rated voltage. VOUT 3.0 V, CL CCPOUT x 0.1, no load VIN VOUT CCPOUT CPOUT VIN VIN S-882Z Series Step-up DC-DC converter VM VSS CIN VDD OUT OUT VSS CL Figure 16 2. VOUT 3.0 V, CL > CCPOUT x 0.1 VIN VOUT SD1 CCPOUT CPOUT VIN CIN VDD OUT VIN S-882Z Series VSS CVDD Step-up DC-DC converter VM VSS Figure 17 12 Seiko Instruments Inc. OUT CL ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 3. VOUT > 3.0 V, CL CCPOUT x 0.1, no load VIN VOUT SD2 CCPOUT CPOUT VIN VIN S-882Z Series VM VSS CIN VDD OUT OUT Step-up DC-DC converter ROUT R1 VSS R2 CL Figure 18 4. VOUT > 3.0 V, CL > CCPOUT x 0.1 VIN VOUT SD1 SD2 CVDD CCPOUT CPOUT VIN CIN VIN S-882Z Series VSS VDD OUT VM Step-up DC-DC converter ROUT OUT R1 VSS R2 CL Figure 19 Caution The above connection diagram and constant will not guarantee successful operation. thorough evaluation using the actual application to set the constant. Seiko Instruments Inc. Perform 13 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Precautions * If the consumption current (ISSS) during shutdown needs to be kept at 0.8 A or lower, set the VM pin voltage (VVM) so that conditions (1) and (2) below are satisfied. (1) VVM VOFF (2) VIN + 1.0 V VVM 3.0 V * If the discharge start voltage (VCPOUT1) of this IC is lower than the operating voltage of the step-up DC-DC converter to be started, the step-up DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).) * Select a capacitor with a sufficiently large capacitance for the startup capacitor. In the case of a capacitor with insufficient capacitance, the step-up DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).) * The discharge start delay time (tOUT) is longer according to conditions (1), (2), and (3) below. longer when these conditions are combined. Also note it is further (1) The operating input voltage (VIN) is low. (2) The discharge start voltage (VCPOUT1) is high. (3) The startup capacitor value (CCPOUT) is large. * When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is needed to be charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop voltage (VCPOUT2). In this case, set the condition as follows: Condition: OUT pin voltage (VOUT)< Discharge stop voltage (VCPOUT2) * Note that the operation to restart a step-up DC-DC converter does not start when CPOUT pin voltage (VCPOUT) exceeds the discharge stop voltage (VCPOUT2) even if the power-off state is released. This operation restarts if VCPOUT is lowered than VCPOUT2 by discharge of a start-up capacitor (CCPOUT). * When designing for mass production using an application circuit described herein, the product deviation and temperature characteristics should be taken into consideration. SII shall not bear any responsibility for the products on the circuits described herein. * Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. * SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 14 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Characteristics (Typical Data) 3.0 2.5 2.0 1.5 1.0 0.5 0 VCPOUT1(S) = 1.8 V Ta = 25C VCPOUT1 VCPOUT2 0 0.5 VCPOUT1, VCPOUT2 [V] VCPOUT1, VCPOUT2 [V] 1. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Input Voltage (VIN) 2.0 1.5 1.0 VIN [V] 3.0 2.5 2.0 1.5 1.0 0.5 0 VCPOUT1(S) = 2.4 V Ta = 25C VCPOUT1 VCPOUT2 0 0.5 2.0 1.5 1.0 VIN [V] 2. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Temperature (Ta) = - - = - - 3. Discharge Control Switch Resistance (RM1) vs. CPOUT Pin Voltage (VCPOUT) VCPOUT1(S) = 1.8 V 40 Ta = 85C RM1 [] 35 30 Ta = 25C 25 Ta = -40C 20 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 VCPOUT [V] 4. Discharge Start Delay Time (tOUT) vs. Input Voltage (VIN) VIN 0.6 V CCPOUT = 10 mF Ta = 25C 8 4 2 0 1.0 0.8 VCPOUT1(S) = 2.4 V tOUT [s] tOUT [s] 6 VIN 0.6 V CCPOUT = 10 mF Ta = 25C 0.6 VCPOUT1(S) = 2.4 V 0.4 0.2 VCPOUT1(S) = 1.8 V 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 VIN [V] 0 VCPOUT1(S) = 1.8 V 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 VIN [V] Seiko Instruments Inc. 15 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 5. Discharge Start Delay Time (tOUT) vs. Startup Capacitor Capacitance Value (CCPOUT) VIN 0.6 V VCPOUT1(S) = 2.0 V Ta = 25C 100 VIN = 0.3 V 60 VIN = 0.35 V VIN = 0.4 V VIN = 0.6 V 40 8 tOUT [s] 80 tOUT [s] 10 0 0 100 40 60 80 CCPOUT [mF] VIN 0.6 V VCPOUT1(S) = 2.4 V Ta = 25C 100 20 0 20 tOUT [s] tOUT [s] VIN = 0.35 V VIN = 0.4 V VIN = 0.6 V 40 100 40 60 80 CCPOUT [mF] - - = = - - = = m = = VIN = 0.6 V 4 VIN = 1.0 V = 0 20 Seiko Instruments Inc. VIN = 2.0 V 100 80 40 60 CCPOUT [mF] = = m = = - - = = 40 60 CCPOUT [mF] VIN 0.6 V VCPOUT1(S) = 2.4 V Ta = 25C 6 0 = 20 VIN = 2.0 V 100 80 2 6. Discharge Start Delay Time (tOUT) vs. Temperature (Ta) = = m 0 8 60 0 VIN = 1.0 V 10 80 16 4 20 20 VIN = 0.6 V 6 2 0 VIN 0.6 V VCPOUT1(S) = 2.0 V Ta = 25C = = m = = = - - ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 7. Current Consumption During Operation (ISS) vs. Input Voltage (VIN) 2.0 Ta = -40C Ta = 25C ISS [mA] 1.5 1.0 Ta = 85C 0.5 0.0 0.0 1.0 0.5 2.0 1.5 VIN [V] 8. Current Consumption During Shutdown (ISSS) vs. Input Voltage (VIN) VVM VCPOUT1(S) = 2.0 V = 1.8 V 0.4 0.4 = 85C 0.3 0.2 0.1 Ta = 25C Ta Ta A] A] Ta ISSS [ 0.3 ISSS [ = 3.0 V V = 1.8 V, 2.0 V, 2.2 V, 2.4 V VM VCPOUT1(S) = -40C 0.2 0.1 0.0 = 85C Ta = 25C Ta = -40C 0.0 0.0 1.0 0.5 2.0 1.5 0.0 VIN [V] 0.5 1.0 1.5 2.0 2.5 3.0 VIN [V] VOFF [V] 9. Shutdown Voltage (VOFF) vs. Input Voltage (VIN) Ta = 25C 3.0 2.5 2.0 1.5 1.0 0.5 0.0 VOFF(S) = 2.5 V VOFF(S) = 1.9 V 0.0 0.5 2.0 1.0 1.5 VIN [V] 10. Shutdown Voltage (VOFF) vs. Temperature (Ta) VOFF [V] 3.0 VOFF(S) = 2.5 V 2.5 2.0 VOFF(S) = 1.9 V 1.5 1.0 -40 -20 0 20 40 Ta [C] 60 80 Seiko Instruments Inc. 17 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series 11. Discharge Control Switch Leak Current (ILEAK) vs. Input Voltage (VIN) = = =- = =- Ta 1.0 VOFF(S) Ta 1.0 0.6 Ta 0.4 Ta = 25C = -40C IVM [ A] 0.8 = 2.5 V = 85C 0.8 0.6 0.4 Ta 0.2 = 25C = -40C 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 VVM [V] Oscillation Frequency (fOSC) vs. Input Voltage (VIN) = 0.0 0.5 1.0 1.5 2.0 VVM [V] 1.2 0.0 = 1.9 V Ta 18 = 85C 0.2 13. VOFF(S) A] = VM Pin Input Current (IVM) vs. VM Pin Voltage (VVM) 1.2 IVM [ 12. = = Seiko Instruments Inc. 2.5 3.0 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Application Circuit Example Figure 20 shows an application circuit example with targeted values of VIN = 0.3 V, VOUT = 3.0 V, and IOUT = 1 mA. VIN VOUT SD2 L SD1 CCPOUT CPOUT VIN CIN OUT CVDD CONT S-882Z Series VDD S-8353D30MC VM VSS VOUT VSS CL Figure 20 Table 8 Part Name Symbol Manufacturer S-882Z Series - Seiko Instruments Inc. Step-up DC-DC converter - Seiko Instruments Inc. Inductor L Schottky diode SD1, SD2 Startup capacitor CCPOUT Input capacitor CIN Output capacitor CL Power smoothing capacitor CVDD Sumida Corporation Rohm Co., Ltd. - - - - Part No. S-882Z20-M5T1G (Discharge start voltage value setting : 2.0 V) S-8353D30MC (Output voltage setting : 3.0 V) CDRH5D18-101 (100 H) RB551V-30 10 F (ceramic type) 47 F 33 F (ESR > 50 m) 1 F (ceramic type) Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Seiko Instruments Inc. 19 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0_00 S-882Z Series Marking Specifications (1) SOT-23-5 SOT-23-5 Top view 5 4 (1) to (3) : (4) : Product code (Refer to Product Name vs. Product Code.) Lot number (1) (2) (3) (4) 1 2 3 Product Name vs. Product Code Product Code (1) (2) (3) S-882Z18-M5T1x Q Y A S-882Z20-M5T1x Q Y B S-882Z22-M5T1x Q Y C S-882Z24-M5T1x Q Y D Remark 1. Please contact our sales office for products with specifications other than the above. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products. Product Name 20 Seiko Instruments Inc. 2.90.2 1.90.2 4 5 1 2 +0.1 0.16 -0.06 3 0.950.1 0.40.1 No. MP005-A-P-SD-1.2 TITLE No. SOT235-A-PKG Dimensions MP005-A-P-SD-1.2 SCALE UNIT mm Seiko Instruments Inc. 4.00.1(10 pitches:40.00.2) +0.1 o1.5 -0 2.00.05 +0.2 o1.0 -0 0.250.1 4.00.1 1.40.2 3.20.2 3 2 1 4 5 Feed direction No. MP005-A-C-SD-2.1 TITLE SOT235-A-Carrier Tape No. MP005-A-C-SD-2.1 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.00.3 Enlarged drawing in the central part o130.2 (60) (60) No. MP005-A-R-SD-1.1 SOT235-A-Reel TITLE No. MP005-A-R-SD-1.1 SCALE QTY. UNIT mm Seiko Instruments Inc. 3,000 www.sii-ic.com * * * * * * * The information described herein is subject to change without notice. Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. The products described herein are not designed to be radiation-proof. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.