BD8158FVM-TR Datasheet, PDF (1/18 Pages) Rohm – High-efficiency Step-up Switching Regulators with Built-in Power MOSFET

BD8152FVM
Single-chip Type with Built-in FET Switching Regulators
High-efficiency
Step-up Switching Regulators
with Built-in Power MOSFET
BD8152FVM,BD8158FVM
No.11027ECT20
Ù¨Description
BD8152FVM,BD8158FVM are the 1-channel step-up switching regulator which builds in the low voltage FET. Input voltage is
2.5 V to 5.5 V (BD8152FVM), 2.1V to 5.5V(BD8158FVM) realizing the low consumption power. High accuracy feedback
voltage r1% is established and the brightness dispersion of TFT-LCD panel is suppressed.
Ù¨Features
1) Current mode PWM system
2) Input voltage is 2.5 V to 5.5 V (BD8152FVM), 2.1 V to 5.5 V (BD8158FVM, providing the low power input)
3) Switching frequency is variable as 600 kHz/1,200 kHz.
4) Built-in 0.25 Ç¡ power switch
5) Feedback voltage 1.245 r 1%
6) Built-in under-voltage lockout protection circuit
7) Built-in overcurrent protection circuit
8) Built-in thermal shutdown circuit
Ù¨Applications
7 to 17 inches panels for the satellite navigation system, laptop PC
TFT-LCD panels
Ù¨Absolute maximum ratings (Ta = 25Í )
Parameter
Symbol
Limit
Unit
Power supply voltage
Vcc
7
V
Power dissipation
Pd
588*
mW
Operating
temperature range
BD8152FVM
BD8158FVM
Topr
Storage temperature range
Tstg
í40 to +85
Í 
í40 to +125
í55 to +150
Í 
Switch pin current
Isw
1.5**
A
Switch pin voltage
Vsw
15
V
Maximum junction temperature
Tjmax
150
Í 
* Reduced by 4.7 mW/Í  over 25Í , when mounted on a glass epoxy board (70 mm u 70 mm u 1.6 mm).
** Must not exceed Pd.
Ù¨Recommended Operating Ranges (Ta = 25Í )
Parameter
Limit
Symbol
Unit
Min.
Typ.
Max.
Power supply voltage (BD8152FVM)
Vcc
2.5
3.3
5.5
V
Power supply voltage (BD8158FVM)
Vcc
2.1
2.5 4.0(5.5)* V
Switch current
ISW
-
-
1.4
A
Switch pin voltage
VSW
-
-
14
V
*Specified at 600kHz switching operating.
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2011.08 - Rev.C