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ROHM Semiconductor - Switching Regulator IC

Numéro de référence BD9757MWV
Description Switching Regulator IC
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BD9757MWV fiche technique
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
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/20
2010.11 - Rev.A

PagesPages 24
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