Datasheet CMOS LDO Regulator Series for Portable Equipments Versatile Package FULL CMOS LDO Regulator BUxxUB3WG series General Description BUxxUB3WG series is high-performance FULL CMOS regulator with 360-mA output, which is mounted on versatile package SSOP5 (2.9 mm x 2.8 mm x 1.25 mm). It has excellent noise characteristics and load responsiveness characteristics despite its low circuit current consumption of 50A. It is most appropriate for various applications such as power supplies for logic IC, RF, and camera modules.ROHM's. Key Specifications Output voltage: Accuracy output voltage: Low current consumption: Operating temperature range: 1.0V to 2.6V 1.0% (25mV) 50A -40C to +85C Applications Battery-powered portable equipment, etc. Package SSOP5: Features High accuracy detection low current consumption Compatible with small ceramic capacitor (Cin=Co=1.0uF) With built-in output discharge circuit High ripple rejection ON/OFF control of output voltage With built-in over current protection circuit and thermal shutdown circuit Package SSOP5 is similar to SOT-23-5 (JEDEC) Low dropout voltage 2.90mm x 2.80mm x 1.25mm Typical Application Circuit STBY VIN STBY VOUT VOUT VIN GND GND GND Fig.1 Application Circuit Product structure:Silicon monolithic integrated circuit This product is not designed protection against radioactive rays. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211114001 1/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series Connection Diagram VOUT SSOP5 N.C. Lot. No Marking VIN GND STBY TOP VIEW Pin Descriptions SSOP5 PIN No. Symbol Function 1 VIN Power Supply Voltage 2 GND Grouding 3 STBY 4 N.C. ON/OFF control of output voltage (High: ON, Low: OFF) Unconnected Terminal 5 VOUT Output Voltage z Ordering Information B U x Part Number x U Output Voltage 10 : 1.0V B 3 Low Dropout Voltage Maximum Output Current 360mA W G with Package output discharge G : SSOP5 26 : 2.6V - Halogen Free G : compatible Blank : incompatible Packageing and forming specification Embossed tape and reel TR : The pin number 1 is the upper right TL : The pin number 1 is the lower left SSOP5 +6 4 -4 2.90.2 5 1 2 0.2Min. 2.80.2 +0.2 1.6 -0.1 4 3 0.050.05 1.10.05 1.25Max. +0.05 0.13 -0.03 +0.05 0.42 -0.04 0.95 0.1 (Unit : mm) www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 2/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series Lineup Marking Output Voltage Part Number MW 1.0V BU10 MX 1.15V BU1B MZ 1.2V BU12 M6 1.25V BU1C LL 2.1V BU21 LM 2.3V BU23 LN 2.5V BU25 LP 2.6V BU26 M7 1.5V BU15 M2 1.8V BU18 M8 1.85V BU1J M9 1.9V BU19 LJ 2.0V BU20 Absolute Maximum Ratings (Ta=25C) PARAMETER Power Supply Voltage Power Dissipation Maximum junction temperature Operating Temperature Range Storage Temperature Range Symbol Limit VMAX -0.3 +4.0 V 540(*1) mW Pd Unit +125 Topr -40 +85 Tstg -55 +125 TjMAX (*1)Pd deleted at 5.4mW/ at temperatures above Ta=25, mounted on 70x70x1.6 mm glass-epoxy PCB. RECOMMENDED OPERATING RANGE (not to exceed Pd) PARAMETER Symbol Limit Unit Power Supply Voltage VIN 1.73.6 V Maximum Output Current IMAX 360 mA OPERATING CONDITIONS PARAMETER Symbol MIN. TYP. MAX. Unit Input Capacitor Cin 0.47(*2) 1.0 - F Output Capacitor Co 0.47(*2) 1.0 - F CONDITION Ceramic capacitor recommended (*2)Make sure that the output capacitor value is not kept lower than this specified level across a variety of temperature, DC bias, changing as time progresses characteristic. www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 3/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series Electrical Characteristics (Ta=25, VIN=VOUT+1.0V (*3), STBY=VIN, Cin=1.0F, Co=1.0F, unless otherwise noted.) PARAMETER Limit Symbol MIN. Unit TYP. Conditions MAX. Overall Device Output Voltage 1 VOUT1 VOUTx0.99 VOUT-25mV Operating Current Operating Current (STBY) Ripple Rejection Ratio Dropout Voltage VOUT VOUTx1.01 V VOUT+25mV IOUT=10AVOUT2.5V IOUT=10AVOUT2.5V IIN - 50 90 A IOUT=0mA ISTBY - - 1.0 A STBY=0V RR 45 70 - dB VRR=-20dBv,fRR=1kHz,IOUT=10mA, VIN=3.6V - 470 700 mV 1.0VVOUT1.2V(IOUT=300mA) - 350 500 mV 1.2VVOUT1.5V(IOUT=300mA) - 280 380 mV 1.5VVOUT1.7V(IOUT=300mA) - 250 320 mV 1.7VVOUT2.1V(IOUT=300mA) - 220 260 mV 2.1VVOUT2.5V(IOUT=300mA) - 200 220 mV 2.5VVOUT2.6V(IOUT=300mA) - 2 20 mV VIN=VOUT+1.0V to 3.6V(*4), IOUT=10A VSAT Line Regulation VDL Load Regulation VDLO - 25 45 mV IOUT=0.01mA to 300mA - 35 55 mV IOUT=0.01mA to 360mA Over-current Protection (OCP) Limit Current ILMAX 370 550 - mA Vo=VOUT*0.95 Short Current ISHORT 50 150 300 mA Vo=0V RDSC 20 50 80 VIN=3.6V, STBY=0V, VOUT=2.6V ISTB 0.1 0.9 8.0 A STBY=1.5V Standby Block Discharge Resistor STBY Pin Pull-down Current STBY Control Voltage ON VSTBH 1.2 - 5.5 V OFF VSTBL -0.3 - 0.3 V VOUT2 1.7 1.8 1.9 V Output Voltage 2 VIN=2.375V to 2.625V VOUT=1.8V, IOUT=0.01mA to 300mA, Ta=-4085 This product is not designed for protection against radioactive rays. (*3) VIN=2.5V for VOUT1.5V (*4) VIN=2.5V to 3.6V for VOUT1.5V Block Diagrams VIN VIN 1 VREF VOUT Cin VOUT 5 GND 2 OCP Co TSD STBY STBY 3 STBY Discharge Cin1.0F (Ceramic) Co 1.0F (Ceramic) Fig. 2 Block Diagrams www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 4/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series z Reference data BU18UB3WG (Ta=25C unless otherwise specified.) LINEREGULATION LINEREGULATION 1.90 1.88 1.86 1.86 1.84 1.84 1.82 1.82 1.80 1.78 1.76 1.80 1.78 1.76 1.74 1.74 85 25 -40 1.72 1.70 85 25 -40 1.72 1.70 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 VIN[V] VIN[V] Fig. 3 Fig. 4 LOAD REGULATION 1.90 OUTPUT VOLTAGE vs TEMPERATURE 1.90 Vout=1.8V 1.88 1.88 1.86 1.86 1.84 1.84 1.82 1.82 VOUT[V] VOUT[V] Vout=1.8V Iout=300mA 1.88 VOUT[V] VOUT[V] 1.90 Vout=1.8V Iout=10mA 1.80 1.78 1.76 Vout=1.8V 1.80 1.78 1.76 1.74 1.74 85 25 -40 1.72 1.70 0 50 100 150 200 250 10mA 150mA 300mA 1.72 1.70 300 -40 -20 0 20 Fig. 5 65 60 80 Fig. 6 GROUND PIN CURRENT vs INPUT VOLTAGE Vout=1.8V 70 40 Temperature[] IOUT[mA] GROUND PIN CURRENT vs LOAD 450 Vout=1.8V 400 60 55 350 50 300 IGND[uA] IGND[uA] 45 40 35 30 25 250 200 150 20 100 15 85 25 -40 10 5 0 0 2.3 2.5 2.7 2.9 3.1 3.3 0 3.5 50 100 150 200 250 300 IOUT[mA] VIN[V] Fig. 7 Fig. 8 www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 85 25 -40 50 5/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series z Reference data BU18UB3WG (Ta=25C unless otherwise specified.) GROUND PIN CURRENT vs TEMPERATURE Vout=1.8V 70 SHUTDOWN CURRENT vs INPUT VOLTAGE Vout=1.8V 2.5 60 2.0 ISHDN[uA] IGND[uA] 50 40 30 1.5 1.0 20 0.5 85 25 -40 10 0.0 0 -40 -20 0 20 40 60 Temperature[] 2.3 80 2.5 2.7 2.9 Fig. 9 3.3 3.5 Fig. 10 CURRENT LIMIT vs INPUT VOLTAGE 700 3.1 VIN[V] POWER-SUPPLY RIPPLE REJECTION vs FREQUENCY 100 Vout=1.8V 90 600 10mA 150mA 80 70 PSRR[dB] ILIM[mA] 500 400 300 60 50 40 30 200 20 85 25 -40 100 10 0 0 2.3 2.5 2.7 2.9 3.1 3.3 10 3.5 100 Fig. 11 20mA/div 0mA 100mV/div 100mA/div 100mV/div 1000000 Trise=Tfall=1us VOUT 10mA IOUT 0mA VOUT Vout=1.8V Vout=1.8V 10s/div 10s/div Fig. 13 Fig. 14 www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 100000 LOAD TRANSIENT RESPONSE 200mA IOUT 10000 Fig. 12 LOAD TRANSIENT RESPONSE Trise=Tfall=1us 1000 Frequency[Hz] VIN[V] 6/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series z Reference data BU18UB3WG (Ta=25C unless otherwise specified.) LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 200mA/div Trise=Tfall=1us 50mA IOUT 0mA 100mV/div 100mV/div 50mA/div Trise=Tfall=1us VOUT 300mA IOUT 0mA VOUT Vout=1.8V Vout=1.8V 10s/div 10s/div Fig. 15 Fig. 16 LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE Slew Rate = 0.5V/s 1V/div 1V/div Slew Rate = 0.5V/s 2.9V VIN 2.9V VIN 2.3V 100mV/div 100mV/div 2.3V VOUT Vout=1.8V VOUT Vout=1.8V Iout=1mA Iout=300mA 1ms/div 1ms/div Fig. 17 Fig. 18 VIN RAMP UP, RAMP DOWN RESPONSE LINE TRANSIENT RESPONSE Slew Rate = 0.5V/s Vout=1.8V Iout=1mA 1V/div 3.6V VIN VIN 100mV/div 1V/div 2.1V VOUT VOUT Vout=1.8V Iout=300mA 1ms/div 200ms/div Fig. 20 Fig. 19 www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 7/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series z Reference data BU18UB3WG (Ta=25C unless otherwise specified.) DISCHARGE TIME START UP TIME 1.5V 1V/div 1V/div 1.5V STBY 0V VOUT 1V/div 1V/div STBY Vout=1.8V Iout=0mA Cout=1.0uF VOUT Vout=1.8V Iout=0mA Cout=1.0uF 40s/div 20s/div Fig. 21 Fig. 22 www.rohm.com (c) 2012 ROHM Co., Ltd. All rights reserved. TSZ2211115001 0V 8/10 TSZ02201-0RBR0A300010-1-2 25.DEC.2012.Rev.001 Datasheet BUxxUB3WG series z About power dissipation (Pd) As for power dissipation, an approximate estimate of the heat reduction characteristics and internal power consumption of IC are shown, so please use these for reference. Since power dissipation changes substantially depending on the implementation conditions (board size, board thickness, metal wiring rate, number of layers and through holes, etc.), it is recommended to measure Pd on a set board. Exceeding the power dissipation of IC may lead to deterioration of the original IC performance, such as causing operation of the thermal shutdown circuit or reduction in current capability. Therefore, be sure to prepare sufficient margin within power dissipation for usage. Calculation of the maximum internal power consumption of IC (PMAX) PMAX=(VIN-VOUT)xIOUT(MAX.) (VIN: Input voltage VOUT: Output voltage IOUT(MAX): Maximum output current) { Measurement conditions Standard ROHM Board Layout of Board for Measurement Top Layer (Top View) IC Implementation Position Bottom Layer (Top View) Measurement State With board implemented (Wind speed 0 m/s) Board Material Glass epoxy resin (Double-side board) Board Size 70 mm x 70 mm x 1.6 mm Top layer Wiring Bottom Rate layer Through Hole Metal (GND) wiring rate: Approx. 0% Metal (GND) wiring rate: Approx. 50% Diameter 0.5mm x 6 holes Power Dissipation 0.54W Thermal Resistance ja=185.2C/W 0.6 0.5 0.54W Standard ROHM Board Pd [W] 0.4 0.3 * Please design the margin so that PMAX becomes is than Pd (PMAX