Rainbow Electronics BD9730KV - Manual

Description
Features
Applications
Dimension (Unit : mm)
∗1 When only IC is used. Derating : 4.0mW/˚C for operation above Ta=25˚C
∗2 PCB (70mmx70mm, t=1.6mm) glass epoxy mounting.
Derating : 9.0mW/˚C for operation above Ta=25˚C
BD9730KV
VQFP48
1.
42
5±
0.
1
0.
10 0.2 ±0. 1 0.5
1 12
37
48 7.
0±
0.
2
9.
0±
0.
3
7.0 ±0.2
25 36
24
13
9.0 ±0.3
0. 15 ±0. 1
0. 10
0.
4
5-channel Switching Regulator Controller
The BD9730KV is a 5-channel switching regulator
controller IC designed for digital still cameras.
This IC can be operated at 2.5V. (Min.).
The 5-channel (4 channel for step-down and 1 channel
for step-up)switching regulator controllers are
integrated into a VQFP48 package. This IC can
operate both external Bipolar and FET transistors.
A triangle wave oscillator, a reference voltage, PWM
comparator, a CMOS type driver, and a short protection
circuit are all integrated in this single IC.
Digital still camera, portable DVD player, digital movie camera, PDA, W-CDMA
1) Operates at a supply voltage of 2.5V (Min.)
2) High-precision reference voltage of 1.0V
±1.2%
3) Can operate both external transistors of FET and Bipolar
(Base current can be set by resistance.)
4) All channels have dead time control
5) Built-in output shutdown circuit (timer latch) when overloaded
6) Channels 1 and 5 can externally set the reference voltage
7) Channels 1, 4 and 5 can control independently the ON/OFF
Absolute Maximum Ratings (Ta=25˚C)
Maximum applied voltage
Power dissipation
Operating temperature range
Storage temperature range
Parameter Symbol Limits Unit
Vmax
Pd
Topr
Tstg
400
+85
+125 -20
-55 ~
+12 -0.3 ~
~
mW
˚C
˚C
V
∗1
∗2 900
Supply voltage
Oscillating frequency
Output current V
CC
— 2.5 11 V
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. Unit Typ. Symbol
IOUT — — 30 mA
100 700 kHz — fosc
∗3
∗3 REG output voltage is derated when Vcc is less than 2.6V~2.5V.