BD8317GWL Datasheet, PDF (1/23 Pages) Rohm – High frequency operation

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
The BD8317GWL is step-up and inverted 2-channel
switching regulator with integrated internal high-side
MOSFET. With wide input range from 2.5~5.5V ,it
suitable for application of portable item. In addition,The
small package design is ideal for miniaturizing the
power supply.
●Features
■ Wide input voltage range of 2.5V to 5.5 V
■ High frequency operation 0.8MHz
■ Incorporates Nch FET of 230mΩ/22V and Pch
Pow FET of 230mΩ/15V
■ Incorporates Soft Start (4.2msec(typ))and hight
side switch of boost channel
■ Independent ON/OFF signal(STB). Built-in
discharge SW for step up channel
■ Small package UCSP50L1( 1.8mm×1.5mm, 4×
3 grid, 11pin, WLCSP)
■ Circuits protection OCP,SCP,UVLO,TSD
●Important Specifications
■ Input voltage range
2.5～5.5 [V]
■ Output boost voltage _{Input voltage(max)~18 [V]}
■ Output inverted voltage
■ Maximum current
■ Operating frequency
■ Nch FET ON resistance
■ Pch FET ON resistance
■ Standby current
-9.0～-1.0 [V]
1.0A](max)
0.8 [MHz] (typ.)
230[mΩ]
230[mΩ]
1[μA](max)
●Package
UCSP50L1 (WLCSP)
1.8mm×1.5mm×0.5mm, 4×3glid,11pin,
●Application
■ LCD battery
■ CCD battery
■ Portable items that are represented by mobile phone
and DSC
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
Vin→
2.5～5.5V
10uF/10V
EN CH1→
EN CH２→
VREF
VDD
STB1
STB2
GND
NON1
INV2
LX1
DIS1
HS2L
LX2
10uH
20k Ω
100k Ω
Vout1: -5.0V/100mA
10uF/16V
10uH
160k Ω
Vout2: 5.0V/100mA
10uF/16V
30k Ω
Figure 1. Application schematic
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TS22111・14・001
1/20
TSZ02201-0Q2Q0AJ00010-1-2
2012.09.5 Rev. 001