BD9352GUL Datasheet, PDF (3/5 Pages) Rohm – Silicon Monolithic Integrated Circuit

○Block Diagram
○Package
3/4
BD9352
LOT No.
Fig. 2
(UNIT : mm)
○Pin Assignment
1
2
3
4
A GND HX2 LX2 PGND2
B GND INV2 STB2 STB1
C VCC VREGA
D HS4H INV4
E HS4L VREF3 NON3 INV3
F TEST1 LX4 PGND34 OUT3
Fig. 3
Exposing the package to strong light like the strobe will cause incorrect operation of the device.
Please confirm the operation after measure of shading so that light should not enter.
Fig. 1
Pin No.
Pin Name
Functions
5
6
HX1 HX1
STB3 LX11
STB4 PGND1
IDSEL LX12
INV1 VOUT1
DCM3 TEST2
A1,B1
A2
A3
A4
A5, A6
B2
B3
B4
B5
B6
C1
C2
C5
C6
D1
D2
D5
D6
E1
E2
E3
E4
E5
E6
F1
F2
F3
F4
F5
F6
GND
HX2
LX2
PGND2
HX1
INV2
STB2
STB1
STB3
LX11
VCC
VREGA
STB4
PGND1
HS4H
INV4
IDSEL
LX12
HS4L
VREF3
NON3
I NV3
I NV1
VOUT1
TEST1
LX4
PGND34
OUT3
DCM3
TEST2
Ground terminal
CH2 Input terminal for synchronous High side switch, Power supply
for Pch Driver
CH2 Terminal for connecting inductors
CH2 Ground terminal for internal FET
CH1 Input terminal for synchronous High side switch, Power supply
for Pch Driver
CH2 Error AMP inverted input
CH2 ON/OFF switch
CH1 ON/OFF switch
CH3 ON/OFF switch
Terminal for connecting inductor for CH1 input
Input for battery voltage
VREGA Output
CH4 ON/OFF switch
CH1 Ground terminal for internal FET
CH4 Power supply for internal load switch
CH3 Error AMP inverted input
CH3 Inverting /Step down mode selector
L : Inverting, H : Step down
Terminal for connecting inductor for CH2 output
CH4 Power supply for internal load switch
CH3 base bias voltage
CH3 Error AMP non-inverted input
CH3 Error AMP inverted input
CH1 Error AMP inverted input
CH1voltage output terminal
TEST terminal. Please short GND or OPEN
CH4 Terminal for connecting inductors
Ground terminal for CH3 driver and CH4 internal FET
Terminal for connecting gate of CH3 PMOS
CH3 output voltage discharge terminal.
When you don’t use discharge function, please short GND terminal.
TEST terminal. Please short GND or OPEN
REV. B