BD9673AEFJ Datasheet, PDF (1/23 Pages) Rohm – Flexible Step-down Switching Regulators with Built-in Power MOSFET

Datasheet
Single-chip Type with Built-in FET Switching Regulators
Flexible Step-down
Switching Regulators
with Built-in Power MOSFET
BD9673AEFJ
●General Description
Output 1.5A and below High Efficiency Rate Step-down
Switching Regulator Power MOSFET Internal Type
BD9673AEFJ mainly used as secondary side Power
supply, for example from fixed Power supply of 12V, 24V
etc, Step-down Output of 1.2V/1.8V/3.3V/5V, etc, can be
produced. This IC has external Coil/Capacitor
down-sizing through 300kHz Frequency operation,
inside Nch-FET SW for 45V “withstand-pressure”
commutation and also, high speed load response
through Current Mode Control is a simple external
setting phase compensation system, through a wide
range external constant, a compact Power supply can
be produced easily.
●Features
■ Internal 200 mΩ Nch MOSFET
■ Output Current 1.5A
■ Oscillation Frequency 300kHz
■ Synchronizes to External Clock ( 200kHz～
500kHz )
■ Feedback Voltage 1.0V±1.0%
■ Internal Soft Start Function
■ Internal Over Current Protect Circuit,
Low Input Error Prevention Circuit,
Heat Protect Circuit
■ ON/OFF Control through EN Pin
(Standby Current 0 A Typ.)
■ Package: HTSOP-J8 Package
●Typical Application Circuits
5V/1.0A VOUT
47µF/15V
GRM32EB31C476KE15 (murata)
15µH CDRH105R
(SUMIDA)
RB056L-40 (ROHM)
R1 120kΩ
C2
C1
open
6800pF
R2 30kΩ
R3 10kΩ
●Key Specifications
■ Input Voltage
■ Ref. Precision (Ta=25℃)
■ Max Output Current
■ Operating Temperature
■ Max Junction Temperature
7V to 42V
±1.0%
1.5A (Max.)
-40℃ to 105℃
-55℃ to 150℃
●Packages
HTSOP-J8
4.90mm x 6.00mm x 1.00mm
HTSOP-J8
●Applications
■ For Household machines in general that have
12V/24V Lines, etc.
0.01µF
Lx
GND
VC
FB
VCC
BST
EN
SYNC
VCC 24V
10µF/35V
GRM31EB3YA106KA12L
(murata)
EN ^ON/OFF
control
SYNC
Figure 1. Typical Application Circuit
○Structure：Silicon Monolithic Integrated Circuit ○This product is not designed for normal operation with in a radioactive.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/20
TSZ02201-0Q1Q0AJ00190-1-2
28.JAN.2014 Rev.003