S52xxM Semiconductor Low Drop Output Voltage Regulator Description The S52xxM is a u-cap 150mA linear voltage regulator in the SOT-25 package. This regulator has very low dropout voltage and very low ground current. It is designed especially for hand-sets, battery-powered devices and can be controlled by a CMOS or TTL. When the S52xxM is disabled, power consumption drops to nearly zero. Features * Low dropout voltage regulator * Low quiescent current and guaranteed 150mA output * Zero off-mode current Ordering Information Type NO. S52xxM Marking Package Code 5 SOT - 25 : Voltage Code Outline Dimensions unit : mm BLOCK DIAGRAM PIN Connections 1. Supply Input 2. Ground 3. Enable/Shutdown 4. Noise Bypass 5. Regulator Output KSI-2012-006 1 S52xxM Absolute Maximum Ratings Ta=25C Characteristic Symbol Ratings Unit Input supply voltage VIN -0.4 ~+16 V Enable Input Voltage VEN -0.4 ~+16 V Power Dissipation Pd 500 mW Junction Temperature Range Tj -40 ~+125 C Storage Temperature Range Tstg -60 ~+150 C Lead Temperature Time Tsol 260 (5 Sec) C Electrical Characteristics ( VIN=VOUT+1V; IOUT = 100uA; CL=4.7uF; VEN2.0V; TJ=25) Characteristic Test Condition Output voltage VOUT - line Regulation IVOUT/ VOUT VIN=VOUT+1V to 16V - 0.3 5 mV Load Regulation IVOUT/ VOUT IOUT=1mA ~100mA - 8 24 mV ICC VEN0.4V(shutdown) - 0.01 1 uA 400 500 Quiescent Current Min. Typ. Max . Symbol See Table 1 * IOUT=50mA (VOUT=1.5V) Dropout Voltage VDROP * IOUT=100mA (VOUT=1.5V) - 500 600 * IOUT=50mA (VOUT =1.8V) - 150 250 * IOUT=100mA (VOUT =1.8V) - 250 450 * IOUT=100uA - 10 50 * IOUT=50mA - 110 150 * IOUT=100mA - 140 250 - 1.5 3.0 - 0.8 1.5 IOUT=50mA,VEN2.0(active) Ground Pin Current IGND (Vout=1.5V/1.8V) IOUT=50mA, VEN2.0(active) Unit mV mA eno IOUT=50mA, CL=4.7uF 470pF from BYP to GND - 260 - nV Hz Enable Input Logic-Low Voltage VIL Regulator Shutdown - - 0.4 V Enable Input Logic-High Voltage VIH Regulator enabled 1.6 - - V IIL VIL0.4V - 0.01 1 IIH VIH2.0V 2 5 10 Output Noise Enable Input Current uA *Note1 : Dropout Voltage is the difference between the input voltage and the output voltage at whitch point the regulator starts to fall out of regulation (this is the point when the output voltage decreases by 100mV). KSI-2012-006 2 S52xxM Table 1 Electrical Characteristics Table Test Condition; VIN = VOUT(TYP) +1V, IOUT =100uA, TA=25, unless otherwise specified. Output Voltage[V] Voltage Code 1.5 Voltage Limit [V] MIN MAX 15 1.440 1.560 1.8 18 1.728 1.872 2.5 25 2.400 2.600 2.8 28 2.688 2.912 3.0 30 2.880 3.120 3.3 33 3.168 3.432 5.0 50 4.800 5.200 Typical Applications 5 Low-Noise Operation :CN=470pF, CL4.7uF Basic Operation :CN= not used, CL1uF KSI-2012-006 3 S52xxM Electrical Characteristic Curves Fig. 2 Fig. 1. Fig. 4 Fig. 3. Fig.5 Fig.6. KSI-2012-006 4 S52xxM Electrical Characteristic Curves (Cont.) Fig. 7. Fig. 8 Shutdown (Dis/Enable) Operation The S52xxM output can be turned off by applying 0.4V or less to the device's Dis/Enable pin (pin3). In shutdown mode, the S52xxM draws less than 1uA quiescent current. The output of the S52xxM is enabled by applying 1.5V to 13V at the Dis/Enable pin. In applications were the S52xxM output will always remain enabled, the Dis/Enable pin may be connected to Vin(pin1). The S52xxM's shutdown circuitry includes hysteresis, as such the device will operate properly even if a slow moving signal is applied to the Dis/Enable pin. The device's shutdown pin includes a 2M internal pull down resistor connected to ground. Short Circuit Protection The S52xxM output can withstand momentary short circuit to ground. Moreover, the regulator can deliver very high output peak current due to its 1A instantaneous short circuit current capability. Noise Bypass Capacitor In low noise applications, the self noise of the S52xxM can be decreased further by connecting a capacitor from the noise bypass pin (pin4) to ground (pin2). The noise bypass pin is a high impedance node as such care should be taken in printed circuit board layout to avoid noise pick-up from external sources. Moreover, the noise bypass capacitor should have low leakage. Noise bypass capacitors with a value as low as 470pF may be used. However, for optimum performance, use a 0.01uF or larger, ceramic chip capacitor. Note that the turn on and turn off response of the S52xxM is inversely proportional to the value of the noise bypass capacitor. For fast turn on and turn off, use a small value noise Bypass capacitor. In applications were exceptionally low output noise is not required, consider omitting the noise Bypass capacitor altogether. KSI-2012-006 5 S52xxM Output Capacitor Selection AUK strongly recommends the use of low ESR(Equivalent series resistance) ceramic capacitors for Cout and CN . The S52xxM is stable with low ESR capacitor (as low as zero ). The value of the output capacitor should be 1uF or higher. Either ceramic chip or a tantalum capacitor may be used at the output. Use of ceramic chip capacitors offer significant advantages over tantalum capacitors. A Ceramic capacitor is typically cheaper than a tantalum capacitor, it usually has a smaller footprint, lower height, and lighter weight than a tantalum capacitor. Furthermore, unlike tantalum capacitors which are polarized and can be damaged if connected incorrectly, ceramic capacitors are nonpolarized. Low value ceramic chip capacitors with X5R or X7R dielectric are available in the 100pF to 4.7uF range. Beware of using ceramic capacitors with Y5V dielectric since their ESR increases significantly at cold temperatures. Figure 9 shows a list of recommended ceramic capacitors for use at the output of S52xxM. If a tantalum output capacitor is used then for stable operation AUK recommends a low ESR tantalum capacitor with maximum rated ESR at or below 0.4. Low ESR tantalum capacitors, such as the TPS series from AVX Corporation (www.avxcorp.com) or the T495 series from Kemet (www.kemet.com) may be used. In applications where a high output surge current can be expected, use a high value but low ESR output capacitor for superior load transient response. The S52xxM is stable with no load. Fig. 9 COUT Capacitor Size IOUT Dielectric Part Number Capacitor Vendor 1F 0805 0805 0805 1206 1206 1206 0 to 150mA X5R X7R X7R X7R X7R X5R C2012X5R1A105KT GRM40X7R105K010 LMK212BJ105KG GRM42-6X7R105K016 EMK316BJ105KL TMK316BJ105KL TDK muRata Taiyo-Yuden muRata Taiyo-Yuden Taiyo-Yuden 2.2F 0805 0805 1206 0 to 150mA X5R X5R X5R GRM40X5R225K 6.3 C2012X5R0J225KT EMK316BJ225ML muRata TDK Taiyo-Yuden 4.7F 1206 1206 0 to 150mA X5R X7R GRM42-6X5R475K010 LMK316BJ475ML MuRata Taiyo-Yuden KSI-2012-006 6