BD9D321EFJ Datasheet, PDF (1/28 Pages) Rohm – 4.5V to 18V Input, 3.0A Integrated MOSFET 1ch Synchronous Buck DC/DC Converter

Datasheet
4.5V to 18V Input, 3.0A Integrated MOSFET
1ch Synchronous Buck DC/DC Converter
BD9D321EFJ
General Description
BD9D321EFJ is a synchronous buck switching regulator
with built-in low on-resistance power MOSFETs. It is
capable of providing current of up to 3 A. The SLLM^TM
control provides excellent efficiency characteristics in
light-load conditions which make the product appropriate
for equipment and devices that demand minimal standby
power consumption. External phase compensation circuit
is not necessary for it is a constant on-time control DC/DC
converter with high speed response.
Features
 Synchronous Single DC/DC Converter
 Constant On-time Control
 SLLM^TM (Simple Light Load Mode) Control
 Over Current Protection
 Short Circuit Protection
 Thermal Shutdown Protection
 Under Voltage Lockout Protection
 Adjustable Soft Start
 HTSOP-J8 Package (Backside Heat Dissipation)
Key Specifications
 Input Voltage Range:
4.5V to 18.0 V
 Output Voltage Setting Range:
0.765V to 7V
(V_IN×0.07)V to (V_IN×0.65)V
 Reference Voltage:
0.765V ± 1.5%
 Output Current:
3 A (Max)
 Switching Frequency:
700 kHz (Typ)
 High Side MOSFET On-Resistance:100 m Ω (Typ)
 Low Side MOSFET On-Resistance: 70 m Ω (Typ)
 Standby Current:
2 μA (Typ)
Package
HTSOP-J8
W (Typ) x D (Typ) x H (Max)
4.90mm x 6.00mm x 1.00mm
Applications
 Step-down Power Supply for DSPs, FPGAs,
Microprocessors, etc.
 Set-top Box
 LCD TVs
 DVD / Blu-ray Player / Recorder
 Entertainment Devices
HTSOP-J8
Typical Application Circuit
Figure 1. Typical Application Circuit
○Product structure: Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays.
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TSZ02201-0J3J0AC00490-1-2
07.Aug.2013 Rev.001