BD9731KV 查看數據表（PDF） - ROHM Semiconductor
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BD9731KV Datasheet PDF : 2 Pages
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01W038A
5-channel switching regulator controller
BD9731KV
Description
BD9731KV is a PWM switching regulator controller IC.
The 5-channel (4 channel for step-up, and 1 channel for
step-down) switching regulator controllers are integrated
into a VQFP48 package. This IC can operate both Bipolar
and MOS transistor. Triangle wave oscillator, reference
voltage, PWM comparator, CMOS type driver, and short
protection circuit are integrated.
Dimension (Units : mm)
9.0±0.3
7.0±0.2
36 25
37
24
48
1
13
12
0. 15±0. 1
Features
1) Can operate both external transistors of Bipolar and MOS.
(Base current can be set by resistance.)
2) Built-in output shutdown circuit (Timer latch) when overloaded.
3) Channel 1, and 5 can externally set the reference voltage.
4) Channel 1, 4, and 5 can control independently ON/OFF.
5) All channels have dead time control.
0.5 0.2±0. 1
0. 10
VQFP48
Applications
Digital still camera, Portable DVD player, W-CDMA, PDA, Digital movie camera
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Limits
Maximum applied voltage
Vmax
–0.3 ~ +12
Power dissipation
400 ∗1
Pd
900 ∗2
Operating temperature range Topr
–20 ~ +85
Storage temperature range
Tstg
–55 ~ +125
∗Derating : 4.0mW/˚C for operation above Ta=25˚C (Only IC unit)
∗PCB (70mmx70mm, t=1.6mm) glass epoxy mounting. Derating : 9.0mW/˚C for operation above Ta=25˚C
Unit
V
mW
˚C
˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Symbol Min. Typ. Max. Unit
Power supply voltage
VCC
2.8
—
11
V
Oscillating frequency
fosc
100
—
700
kHz
Output current
IOUT
—
—
30
mA
May, 2001
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