BD3940T Просмотр технического описания (PDF) - ROHM Semiconductor
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BD3940T Datasheet PDF : 9 Pages
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TECHNICAL NOTE
Power Management LSI Series for Automotive Body Control
High temperature
operating
LDO Regulator
Now available
BD3940FP, BD3941FP/HFP/T
zDescription
BD394□FP Series regulators feature a high 36 V breakdown voltage and are compatible with onboard vehicle microcontrollers. They offer
an output current of 500 mA while limiting dark current to 30 µA (TYP). The series supports the use of ceramic capacitors as output phase
compensation capacitors. Since the ICs use P-channel DMOS output transistors, increased loads do not result in increased total supply
current. BD394□FP Series is ideal for lowering current consumption and costs in battery direct-coupled systems.
zFeatures
1) Super-low dark current: 30 µA (Typ.)
2) Low-saturation voltage type P-channel DMOS output transistors
Output on resistance: 1.6 Ω (Typ.)
3) High precision output voltage: 5 V ±2% (Ta = 25°C) / Iomax = 500 mA
4) Low-ESR ceramic capacitors can be used as output capacitors
5) Vcc power supply voltage = 36 V / Peak power supply voltage = 50 V (tr ≥ 1 ms, tH ≤ 200 ms)
6) Built-in over current protection circuit and thermal shutdown circuit
7) TO252-3/HRP-5/TO220FP-3 package
zApplications
Vehicle equipment, car stereos, satellite navigation systems, etc.
zProduct line
Model
Output voltage
BD3940FP
3.3 V
BD3941FP/HFP/T
5.0 V
zAbsolute maximum ratings (Ta = 25°C)
Parameter
Power supply voltage
Symbol
Vcc
Limit
Unit
36*1
V
Output current
Power dissipation
Io
500
mA
1.2*2
Pd
1.6*3
W
2.0*4
Operating temperature range
Topr
−40 to +125
°C
Storage temperature range
Peak power supply voltage
Tstg
−55 to +150
°C
Vcc Peak
50*5
V
Maximum junction temperature
Tjmax
150
°C
* 1Not to exceed Pd.
*2 For TO252-3, reduced by 9.6 mW/°C over 25°C, when mounted on a glass epoxy board (70 mm × 70 mm × 1.6 mm).
*3 Reduced by 12.8 mW/°C over 25°C, when mounted on a glass epoxy board (70 mm × 70 mm × 1.6 mm).
*4 For TO220FP-3, reduced by 16.0 mW/°C over 25°C.
*5 Application time 200 ms or shorter. (tr ≥ 1 ms)
Ver.B Oct2005
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