BD9757MWV_10 Datasheet, PDF (1/24 Pages) Rohm – Switching Regulator IC

Regulators ICs for Digital Cameras and Camcorders
Switching Regulator IC
with Built-in FET (5V)
BD9757MWV
No.10036EAT09
●Description
BD9757MWV is an 8-channel switching regulator with a built-in FET for digital still camera. It has a built-in function to
light-control the white LED for backlight according to the light control setting signal from microcomputer.
●Features
1) Starting from VBAT terminal of 1.5V
2) Power of internal circuit is supplied from voltage boost CH1
3) Mounted with a total of 8ch including voltage boost 2ch, voltage step-down 4ch, inversion 1ch, and white
LED-purpose voltage boost (compatible with DC light control) 1ch
4) Built-in 5-channel transistors for synchronous rectification
5) Built-in 2-channel FET transistors for voltage boost
6) Built-in all-channel phase compensation between input and output of error amplifier
7) Channel 1 and 3 are common, but other channels are independent, so the ON/OFF is possible
8) Operating frequencies of 1.2MHz (CH1 ~ 5), 600KHz(CH6 ~ 8)
9) Built-in output breaking circuit (timer latch type) at the time of overload
10) Built-in 2ch of high side switch with soft start function
11) UQFN044V6060 package (6mm×6mm ,0.4mm pitch) with heat dissipation
●Applications
Digital still camera
●Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Ratings
Power Supply Voltage
VBAT
-0.3 ~ 7
VHx1 ~ 5
-0.3 ~ 7
Power Input Voltage
HS78H
-0.3 ~ 7
VLx7,8
-0.3 ~ 22
IomaxLx1
±2.5
IomaxHx1
±1.5
Maximum output current
IomaxHx2,5
IomaxHx3,4
+1.0
+0.8
IomaxHS78
+1.2
Power Dissipation
IomaxLx7,8
Pd
±1.0
0.54^(※1)
Operating temperature range
Topr
-25 ~ +85
Storage temperature range
Tstg
-55 ~ +150
Junction temperature
Tjmax
+150
※1 At the time of a single IC. If used in more than Ta=25℃, reduced by 4.32mW/℃.
Units
V
V
V
V
A
A
A
A
A
A
W
℃
℃
℃
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2010.11 - Rev.A