BD9102FVM_13 Datasheet, PDF (1/29 Pages) Rohm – Synchronous Buck Converter Integrated FET

4.0V(or 4.5V) to 5.5V, 0.8A 1ch
Synchronous Buck Converter Integrated FET
BD9102FVM BD9104FVM
General Description
The BD9102FVM and BD9104FVM are ROHM’s high
efficiency step-down switching regulator designed to
produce a voltage as low as 1.24V from a supply
voltage of 5V. Offers high efficiency with our original
pulse skip control technology and synchronous
rectifier. It offers high efficiency by using synchronous
switches and provides fast transient response to
sudden load changes by implementing current mode
control.
Features
 Fast Transient Response Because of Current Mode
PWM Control System.
 Highly Efficient for All Load Ranges Because of
Synchronous Rectifier (Nch/Pch FET) and SLLM^TM
(Simple Light Load Mode)
 Soft-Start Function.
 Thermal Protection and UVLO Functions.
 Short-Circuit Protection with Time Delay Function.
 Shutdown Function
Key Specifications
 Input Voltage Range
BD9102FVM:
BD9104FVM:
 Output Voltage Range
BD9102FVM:
BD9104FVM:
 Output Current:
 Switching Frequency:
 Pch FET ON-Resistance:
 Nch FET ON-Resistance:
 Standby Current:
 Operating Temperature Range:
4.0V to 5.5V
4.5V to 5.5V
1.24V ± 2%
3.30V ± 2%
0.8A(Max)
1.0MHz(Typ)
350mΩ(Typ)
250mΩ(Typ)
0μA(Typ)
-25°C to +85°C
Package
W(Typ) x D(Typ) x H(Max)
Applications
Power supply for HDD, portable electronic devices like
PDA, and LSI including CPU and ASIC.
Typical Application Circuit
MSOP8
2.90 mm x 4.00 mm x 0.90 mm
Figure 1. Typical Application Circuit
Lineup
Input Voltage Range Output Voltage Range
4.0V to 5.5V
4.5V to 5.5V
1.24V±2%
3.30V±2%
UVLO Threshold
Voltage
(Typ)
2.7V
4.1V
Package
MSOP8
MSOP8
Reel of 3000
Reel of 3000
Orderable
Part Number
BD9102FVM-TR
BD9104FVM-TR
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○ This product has no designed protection against radioactive rays
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TSZ02201-0J3J0AJ00340-1-2
24.Oct.2013 Rev.003