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ROHM Semiconductor - Single Synchronous Buck DC/DC Converter

Numéro de référence BD9B331GWZ
Description Single Synchronous Buck DC/DC Converter
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BD9B331GWZ fiche technique
2.7V to 5.5V Input ,3A Integrated MOSFET
Single Synchronous Buck DC/DC Converter
BD9B331GWZ
General Description
ROHM’s high efficiency switching regulator,
BD9B331GWZ, is a step-down converter designed to
produce a low voltage output of 0.6V~3.3V from a
2.7V~5.5V power supply line. It offers high efficiency in
all load ranges by automatic PFM/PWM adjustment. It
employs an On time control system to provide faster
transient response to sudden change in load.
Features
Fast transient response with On time control system.
High efficiency for all load range with synchronous
rectifier (Nch/Nch FET) and adaptive PFM/PWM
system.
Adjustable Soft-start function.
Thermal and UVLO protection.
Short-circuit current protection with pulse count
Shutdown function.
Key Specifications
Input Voltage Range:
2.7V to 5.5V
Output Voltage Range:
0.6V to PVCC×0.8V
Output Current:
3.0A (Max)
Switching Frequency:
1.3MHz(Typ)
High Side FET ON Resistance:
23m(Typ)
Low Side FET ON Resistance:
23m(Typ)
Standby Current:
0µA (Typ)
Operating Temperature Range: -40°C to +85°C
Package(s)
UCSP30L1:
W(Typ) x D(Typ) x H(Max)
1.98mm x 1.80mm x 0.33mm
Applications
Power supply for LSI including SoC, DSP,
Micro computer and ASIC
Laptop PC / Tablet PC / Server
LCD TV, Storage Devices (HDD / SSD)
Printer
Amusement
Secondary power supply
.
UCSP30L1
Typical Application Circuit(s)
VIN
CIN
EN
CSS
PVCC
AVCC
EN
BD9B331GWZ
SS
PGD
BST
SW
FB
RES
AGND
PGND
CBST
L
PGD
VOUT
COUT
Figure 1. Typical Application Circuit
Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/27
TSZ02201-0J3J0AJ00810-1-2
27.MAY.2015 Rev.002

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