BD9870FPS_09 Datasheet, PDF (1/12 Pages) Rohm – Simple Step-down Switching Regulator with Built-in Power MOSFET

Single-chip Type with Built-in FET Switching Regulator Series
Simple Step-down
Switching Regulator
with Built-in Power MOSFET
BD9870FPS
No.09027EAT26
● Description
The BD9870FPS single-channel step-down switching regulator incorporates a Pch MOSFET capable of PWM operation at
900kHz, enabling use of a smaller coil, as well as circuitry that eliminates the need for external compensation – only a diode,
coil, and ceramic capacitor are required – reducing board size significantly.
●Features
1) Maximum switching current: 1.5A
2) 2. Built-in Pch FET ensures high efficiency
3) Output voltage adjustable via external resistors
4) High switching frequency: 900kHz (fixed)
5) Soft start time: 5ms (fixed)
6) Overcurrent and thermal shutdown protection circuits built in
7) ON/OFF control via STBY pin
8) Ceramic output capacitor compatibility
9) Small surface mount TO252S-5 package
●Applications
TVs, printers, DVD players, projectors, gaming devices, PCs, car audio/navigation systems, ETCs, communication
equipment, AV products, office equipment, industrial devices, and more.
●Absolute Maximum Ratings（Ta＝25℃）
Parameter
Symbol
Supply Voltage（VCC-GND）
Vcc
STBY-GND
V_STBY
OUT-GND
V_OUT
INV-GND
V_INV
Maximum Switching Current
Iout
Power Dissipation
Pd
Operating Temperature
Topr
Storage Temperature
Tstg
(*1) Do not exceed Pd, ASO, and Tjmax=150℃
(*2) Derated at 6.4mW/°C over Ta=25℃
●Operating Conditions(Ta=-40 to +85℃)
Parameter
Input Voltage
Output Voltage
Symbol
VCC
Vo
Ratings
Unit
36
V
36
V
36
V
5
1.5^(*1)
800^(*2)
V
A
mW
-40 to +85
℃
-55 to +150
℃
Limit
MIN
MAX
Unit
8.0
35.0
V
1.0
0.8×(VCC-Io×Ron)
V
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2009.05 - Rev.A