Rainbow Electronics BD9718G - Manual

BD9718G
Regulators
1/2
Inverting Switching Regulator Controller
BD9718G
The BD9718G is a high performance fixed frequency power switching regulator. This regulator was specifically designed
to be incorporated for step-down and voltage inverting functions with a minimum number of external components.
!
! ! ! Applications ! ! ! ! External dimensions (Unit : mm)
Pre-amplifier bias supply for hard disk drive (HDD),
designs or other voltage inverter requirements.
!
! ! ! Features
1) High-accuracy output voltage detection. (Vs= −5.00±1%)
2) High switching frequency (900kHz typ.)
3) Built-in soft start function. (No external components required.)
4) Timer latch type short protection function. (No external components
required.)
5) Ultra small package: SMP5C2
!
! ! ! Absolute maximum ratings (Ta = 25 °C)
Parameter Symbol Limits Unit
V
CC
15 V
170 mW
Topr
Pd
° C
°
C
Tstg
−
40 to
+
85
− 55 to + 125
∗
∗ Derating : 1.7mW/ ° C for operation above Ta=25 ° C.
Supply voltage
Power dissipation
Operating temperature range
Storage temperature range
!
! ! ! Recommended operating conditions (Ta = 25 °C)
Parameter Unit Symbol
V CC
Typ.
5
Min.
4
Max.
14 V Supply voltage
SMP5C2
4ы
0.1
-4ы
+6ы
2.9 ± 0.2
5 4
2.8
± 0.2
1 2 3
0.95 1.1
± 0.05
0.05
± 0.05
0.2Min.
0.13 +0.05
-0.03
0.42 +0.05
-0.04
1.
6
+0.2 − 0.1