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BD90571EFJ-C Datasheet, PDF (1/22 Pages) Rohm – 2.69 to 5.5V, 1.2V Output, 2.25MHz Synchronous Step-Down Converter | |||
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BD90571EFJ-C
Datasheet
Secondary power supply series for automotive
2.69 to 5.5V, 1.2V Output, 2.25MHz
Synchronous Step-Down Converter
BD90571EFJ-C
âGeneral Description
The BD90571EFJ-C is a synchronous rectification type
step-down DC/DC converter with a 2.25MHz fixed
frequency that operates in with an input voltage range
of 2.69V-5.5V. It has an integrated feedback resistor
that supplies a fixed output voltage of 1.2V and a
phase compensation constant. Applications can be
created with a minimum of three external components.
Moreover, the integrated Pch and Nch output MOSFET
can supply a maximum output current of 1A.
âFeatures
â Thanks to the integrated output feedback resistor
and phase compensation, applications can be
created with a minimum of external components
â Excellent load response through current mode
control
â Integrated Pch and Nch output MOSFET
â Integrated overcurrent protection with auto-reset
â Integrated output overvoltage detection/
short-circuit detection
â Integrated TSD and UVLO
â Light load mode/PWM fixation operation selection
terminal
âApplications
â Automotive equipment
â Car audio and navigation
â TV
â Other electronic equipment
âTypical application circuit
10μF
1μF
1.5μH
47μF
Figure 1. Typical application circuit
(VIN=5V, VOUT=1.2V, IOUT=1A)
âKey Specifications
â Input voltage range
â Output voltage
â Output voltage accuracy
â Operating frequency
â Maximum output current
â Circuit current at standby
â Operational temperature
range
2.69Vï½5.5[V]
1.2 [V] (Typ.)
±2.0[%](-40ï½+125°C)
2.25 [MHz] (Typ.)
1.0 [A] (Max.)
0[μA](Typ., 25°C)
-40ï½+125[°C]
âPackage
HTSOP-J8
4.90 ãÃ6.00 ãÃ1.00 ã
100
90
Light Load MODE
80
70
60
50
PWM MODE
40
30
20
10
0
0.01
VIN=5.0V
Figure 1 CIRCUIT
0.10
1.00
LOAD CURRENT [A]
Figure 2. Efficiency(VIN=5V)
âProduct structureï¼Silicon monolithic integrated circuit âThis product is not designed to be radiation resistant.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0T1T0AL00030-1-2
31.JUL.2012 Rev.001
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