BD3940FP 반도체 회로 부품 판매점
LDO Regulator
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 ROHM Semiconductor |
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
Symbol
Limit
Unit
Power supply voltage
Vcc
36*1
V
Output current
Io 500 mA
1.2*2
Power dissipation
Pd
1.6*3
W
2.0*4
Operating temperature range
Topr
−40 to +125
°C
Storage temperature range
Tstg
−55 to +150
°C
Peak power supply voltage
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
zRecommended operating conditions (Ta = 25°C)
Parameter
Symbol
Input voltage
BD3940FP/HFP
BD3941FP/HFP/T
Vcc
Vcc
Output current
Io
Min.
4.5
6.2
—
Max.
25.0
25.0
500
Unit
V
V
mA
zElectrical characteristics (Unless otherwise specified, Ta = 25°C; Vcc = 13.2 V; Io = 200 mA)
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Bias current 1
Ib1 — 30 40 µA
Bias current 2
Ib2 — 30 — µA
Output voltage
BD3940FP
BD3941FP/HFP/T
Vo 3.234 3.300 3.366 V
Vo 4.900 5.000 5.100 V
Output current
Io
500 —
— mA
Minimum I/O voltage
difference
BD3940FP
BD3941FP/HFP/T
∆Vd
— 0.45 0.65
V
Ripple rejection
R.R. 45 55 — dB
Input stability
Load stability
BD3940FP
Reg.I
—
10
30 mV
BD3941FP/HFP/T
Reg.L
—
20
60 mV
Conditions
Io = 0 mA
Io = 200 mA
Vcc = 3.135 V, Io = 100 ｍA
Vcc = 4.75 V, Io = 200 ｍA
f = 120 Hz, ein = 1 Vrms,
Io = 100 mA
Vcc = 4.5 V → 25 V
Vcc = 6.2 V → 25 V
Io = 0 mA → 200 mA
zElectrical characteristics (Unless otherwise specified, Ta = −40°C to +125°C; Vcc = 13.2 V; Io = 200 mA)
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Conditions
Bias current 1
Ib1 — 30 40 µA Io = 0 mA
Bias current 2
Ib2 — 30 — µA Io = 200 mA
Output voltage
BD3940FP
BD3941FP/HFP/T
Vo 3.168 3.300 3.366 V
Vo 4.800 5.000 5.100 V
Output current
Io 500 — — mA
Minimum I/O voltage BD3940FP
difference
BD3941FP/HFP/T
∆Vd
—
— 0.9
Vcc = 3.135 V, Io = 100 ｍA
V
Vcc = 4.75 V, Io = 200 ｍA
Ripple rejection
R.R.
45
55
—
dB
f = 120 Hz, ein = 1 Vrms,
Io = 100 mA
Input stability
BD3940FP
Vcc = 4.5 V → 25 V
Reg.ｌ
—
10
45 mV
BD3941FP/HFP/T
Vcc = 6.2 V → 25 V
Load stability
Reg.L
—
20
60 mV Io = 0 mA → 200 mA
Note: This IC is not designed to be radiation-resistant.
Note: All characteristics are measured with 0.33 µF and 0.1 µF capacitors connected to input and output pins, respectively.
Because measurements (pulse measurements) were taken when Ta ≈ Tj, data other than the output voltage/temperature coefficient
does not include fluctuations due to temperature variations.
2/8
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BD3940FP regulator
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