BD9757MWV_10 Datasheet, PDF (7/24 Pages) Rohm – Switching Regulator IC

BD9757MWV
●Pin Assignment
33 32 31 30 29 28 27 26 25 24 23
Technical Note
34 INV8
35 HS7L
36 _HS78H
37 HS8L
38 _LX8
39 PGND678
40 LX7
41 OUT6
42 UPIC8
43 _STB7
44 STB6
BD9757MWV
INV1 ²²
VBAT ²¹
HX1 ²⁰
HX1 19
LX1 18
LX1 ¹⁷
PGND13 16
PGND13 ¹⁵
LX3 14
HX3 13
STB13 12
1 2 3 4 5 6 7 8 9 10 11
Fig.22 BD9757MWV Top VIEW
●Pin Description
PIN No.
21
28
26
PIN name
VBAT
VCCOUT
GND
I/O
Function
I Battery voltage input
I Power supply input terminal
- Earth terminal
Notes
Starting up at
higher than 1.5V
Connecting
the CH1 output
15,16,7,2,39
PGND13,24,5, 678 - Earth terminal with built-in FET
27
VREGA
O VREGA output
2.5V output
30
VREF6
O reference voltage output for CH6 inversion 1.0V output
41
19,20,5,13,9,4
17,18,6,14,8,3,40,38
36
35,37
OUT6
Hx1,2,3,4,5
Lx1,,2,3,4,5,7,8
HS78H
HS7L,HS8L
O CH6 PMOS gate connection terminal
O
Synchronous rectification high side switch
input terminal, Pch Driver power supply output
O Inductor connection terminal
I
Built-in load switch power supply input
terminal
O Built-in load switch output terminal
22,25,23,24,29,32,34 INV1,2,3,4,5,7,8 I Error amplifier inversion input terminal
31
NON6
I Error amplifier non-inversion input terminal
33
12,10,11,1,44,43
42
INV8I
STB13,2,4,5,6,7
UPIC8
I Error amplifier inversion input terminal
I
CH1 ~ CH7 ON / OFF switch
Operating :higher than 1.5V
I
CH8 start-up signal, LED light
control-purpose signal input
At the time of All Low
Standby state
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2010.11 - Rev.A