BD9B400MUV Datasheet, PDF (1/34 Pages) Rohm – Integrated MOSFET Single Synchronous Buck DC/DC Converter

Datasheet
2.7V to 5.5V Input, 4.0A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9B400MUV
General Description
BD9B400MUV is a synchronous buck switching
regulator with built-in low on-resistance power MOSFETs.
This IC, which is capable of providing current up to 4A,
features fast transient response by employing constant
on-time control system. It offers high oscillating
frequency at low inductance. With its original constant
on-time control method which operates low consumption
at light load, this product is ideal for equipment and
devices that demand minimal standby power
consumption.
Features
 Synchronous Single DC/DC Converter
 Constant on-time control suitable to Deep-SLLM
 Over Current Protection
 Short Circuit Protection
 Thermal Shutdown Protection
 Under Voltage Lockout Protection
 Adjustable Soft Start
 Power Good Output
 VQFN016V3030 Package
(backside heat dissipation)
Key Specifications
 Input Voltage Range:
2.7V to 5.5V
 Output Voltage Range: 0.8 V to VPVIN x 0.8 V
 Maximum Operating Current:
4A (Max)
 Switching Frequency:
2MHz/1MHz (Typ)
 High-Side MOSFET ON Resistance: 30mΩ (Typ)
 Low-Side MOSFET ON Resistance: 30mΩ (Typ)
 Standby Current:
0μA (Typ)
Package(s)
VQFN016V3030
W (Typ) x D (Typ) x H (Max)
3.00 mm x 3.00 mm x 1.00 mm
Applications
 Step-down Power Supply for DSPs, FPGAs,
Microprocessors, etc.
 Laptop PCs/Tablet PCs/Servers
 LCD TVs
 Storage Devices (HDDs/SSDs)
 Printers, OA Equipment
 Entertainment Devices
 Distributed Power Supply, Secondary Power Supply
VQFN016V3030
Typical Application Circuit
VIN
Enable
22µF
0.1µF
BD9B400MUV
PVIN
PGD
AVIN
EN
BOOT
AGND
SW
0.1µF
1.0µH
PGD
VOUT
PGND
SS
R1
CFB 22µF×2
MODE
CSS
FREQ
FB
R2
Figure 1. Application Circuit
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0J3J0AJ01200-1-2
22.Apr.2016 Rev.002