BD9329AEFJ_15 Datasheet, PDF (1/23 Pages) Rohm – Synchronous Buck Converter with Integrated FET

Datasheet
4.2V to 18V, 3A 1ch
Synchronous Buck Converter with
Integrated FET
BD9329AEFJ
General Description
The BD9329AEFJ is a synchronous step-down
switching regulator with built-in two low-resistance
N-Channel MOSFETs. This IC can supply continuous
output current of 3A over a wide input range, and
provides not only fast transient response, but also easy
phase compensation because of current mode control.
Features
 Uses Low ESR Output Ceramic Capacitors
 Low Standby Current
 380 kHz Fixed Operating Frequency
 Feedback Voltage
 0.9V ± 1.5%(Ta=25°C)
 0.9V ± 2.0%(Ta=-25°C to +85°C)
 Under Voltage Protection
 Thermal Shutdown
 Over Current Protection
Key Specifications
Input Voltage Range:
Output Voltage Range:
Output Current:
Switching Frequency
Hi-Side FET ON-Resistance:
Lo-Side FET ON-Resistance:
Standby Current:
Operating Temperature Range:
4.2V to 18V
0.9V to (VIN x 0.7)V
3.0A (Max)
380kHz(Typ)
0.15Ω(Typ)
0.13Ω(Typ)
15μA (Typ)
-40°C to +85°C
Package
W(Typ) D(Typ) H(Max)
Applications
Distributed Power Systems
Pre-Regulator for Linear Regulators
Typical Application Circuit
C_SS
0.1μF
C_PC
3300pF
R_PC
7.5kΩ
HTSOP-J8
4.90mm x 6.00mm x 1.00mm
R_DW
10kΩ
R_UP
27kΩ
Thermal Pad
(to be shorted to GND)
VIN = 12V
C_VC1
10μF
L
10µH
VOUT = 3.3V
C_CO1
20μF
R_BS protects from VIN-BST short destruction.
Figure 1. Typical Application Circuit
〇Product structure : Silicon monolithic integrated circuit
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
〇This product has no designed protection against radioactive rays
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TSZ02201-0323AAJ00010-1-2
16.Feb.2015 Rev.003