Datasheet Single-chip Type with Built-in FET Switching Regulator Series Step-up and inverted 2-channel DC/DC converter with Built-in Power MOSFET BD8317GWL Description Important Specifications The BD8317GWL is step-up and inverted 2-channel Input voltage range 2.55.5 V switching regulator with integrated internal high-side Output boost voltage Input voltage(max)~18 V MOSFET. With wide input range from 2.5~5.5V ,it Output inverted voltage -9.0-1.0 V suitable for application of portable item. In addition,The Maximum current 1.0A (max) small package design is ideal for miniaturizing the Operating frequency 0.8 MHz (typ.) power supply. Nch FET ON resistance 230 m Pch FET ON resistance 230 m Features Standby current Wide input voltage range of 2.5V to 5.5 V 1 A (max) High frequency operation 0.8MHz Package UCSP50L1 (WLCSP) Incorporates Nch FET of 230m /22V and Pch 1.8mm 1.5mm 0.5mm, 4 3glid,11pin, Pow FET of 230m /15V Incorporates Soft Start (4.2msec(typ))and hight Application side switch of boost channel Independent ON/OFF signal(STB). Built-in LCD battery discharge SW for step up channel CCD battery Small package UCSP50L1( 1.8mm 1.5mm, 4 Portable items that are represented by mobile phone and DSC 3 grid, 11pin, WLCSP) Circuits protection OCP,SCP,UVLO,TSD STRUCTURE : Silicon Monolithic Integrated Circuit Typical Application Input: 2.5 to 5.5V, ch1 output: -5.0 V /100mA(MAX), ch2 output:5.0 V /100mA(MAX) 0.1uF/10V 20k 100k Vout1: -5.0V/100mA 10uF/16V 10uH VREF NON1 LX1 Vin VDD 2.5 5.5V 10uF/10V DIS1 EN CH1 STB1 EN CH STB2 HS2L 10uH Vout2: 5.0V/100mA LX2 GND INV2 10uF/16V 160k 30k Figure 1. Application schematic www.rohm.com TSZ02201-0Q2Q0AJ00010-1-2 2011 ROHM Co., Ltd. All rights reserved. 1/20 TS2211114001 2012.09.5 Rev. 001 BD8317GWL Pin Description C B A 1 2 3 4 Figure 2. Pin assignment (Bottom view) Pin No. Pin Name Function A-1 VDD Power input voltage pin. Connect to input ceramic capacitor bigger than 0.47uF. A-2 HS2L Load SW output pin .Connect to inductor A-3 LX2 Boost channel drain Nch Power MOS. Connect to diode and inductor. A-4 GND Ground connection B-1 LX1 PchPowerMOS drain of boost channel. Connect to diode and inductor Enable pin of inverted channel. B-3 STB1 ON threshold set to 1.5V. Integrated pull down resistance (800k (typ)) Enable pin of boost channel. B-4 STB2 ON threshold set to 1.5V. Integrated pull down resistance (800k (typ)) Discharge SW of inverted channel. Connect to output of inverted channel. C-1 DIS1 STB1 disable , Output pin voltage is discharged by 100 (typ) Reference voltage of inverted channel. C-2 VREF 1.0V(typ) is included in error amp offset Feedback pin of inverted channel. Connect to feedback resistance and set output voltage. C-3 NON1 The method of output voltage setting is P16/20. When inverted cannel is disable , the pin is discharged by integrated resistance (150 (typ)) Feedback pin of boost channel. Connect to feedback resistance and set output voltage. C-4 INV2 The method of output voltage setting is P16/20. www.rohm.com TSZ02201-0Q2Q0AJ00010-1-2 2011 ROHM Co., Ltd. All rights reserved. 2/20 TS2211114001 2012.09.5 Rev. 001