L4964 データシートの表示（PDF） - STMicroelectronics
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L4964 Datasheet PDF : 13 Pages
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L4964
ELECTRICAL CHARACTERISTICS
(refer to the test circuits Tj = 25oC, Vi = 25V, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit Fig.
DYNAMIC CHARACTERISTICS (pin 6 to GND unless otherwise specified)
Vo
Vi
∆Vo
∆Vo
Vref
∆Vref
∆T
Vd
Iom
I2L
ISH
η
SVR
f
∆f
∆Vi
∆f
∆Tj
fmax
Tsd
Output Voltage Range
Vi = 36V, Io = 1A
Vref
28
V
4
Input Voltage Range
Vo = Vref to 28V, Io = 3A
9
36
V
4
Line Regulation
Vi = 10V to 30V, Vo = Vref, Io = 2A
15 70 mV 4
Load Regulation
Io = 1A to 2A
Io = 0.5A to 3A, Vo = Vref
10 30 mV 4
15 50 mV 4
Internal Reference Voltage (Pin 10) Vi = 9V to 36V, Io = 2A
4.95 5.1 5.25 V
4
Average Temperature Coefficient Tj = 0°C to 125°C, Io = 2A
of Reference Voltage
0.4
mV/°C
Dropout Voltage between Pin 2
and Pin 3
Io = 3A
Io = 2A
2 3.2
V
4
1.5 2.4
V
4
Maximum Operating Load Current VI = 9V to 36V, Vo = Vref to 28V
4
A
4
Current Limiting Threshold (Pin 2) Vi = 9V to 36V, Vo = Vref to 28V 4.5
8
A
4
Input Average Current
Efficiency
Vi = 36V, Output Short-circuited
Io = 3A
Vo = Vref
Vo = 12V
80 140 mA 4
75
%4
85
%4
Supply Voltage Ripple Rejection
∆VI = 2Vrms, fripple = 100Hz
Vo = Vref, Io = 2A
46 56 –
dB 4
Switching Frequency
40 50 60 kHz 4
Voltage Stability of Switching
Frequency
Vi = 9V to 36V
0.5
%4
Temperature Stability of Switching Tj = 0°C to 125°C
Frequency
1
%4
Maximum Operating Switching
Frequency
Thermal Shutdown Junction
Temperature
Vo = Vref, Io = 1A
120
135 145
kHz –
°C –
DC CHARACTERISTICS
I3Q Quiescent Drain Current
–I2L Output Leakage Current
Vi = 36V, V7 = 0V, S1 : B, S2 : B
V6 = 0V
V6 = 3V
Vi = 36V, V6 = 3 V, V7 = 0V
S1 : B, S2 : A
mA 6a
66 100
30 50
2 mA 6a
SOFT START
I5so
I5 si
INHIBIT
Source Current
Sink Current
V6 = 0V, V5 = 3V
V6 = 3V, V5 = 3V
80 130 180 µA 6b
40 70 140 µA 6b
V6L Low Input Voltage
V6H High Input Voltage
Input Current with Input Voltage
– I6L
–I6H
Low Level
High Level
ERROR AMPLIFIER
Vi = 9V to 36V, V7 = 0V
S1 : B, S2 : B
Vi = 9V to 36V, V7 = 0V
S1 : B, S2 : B
V6 = 0.8V
V6 = 2V
- 0.3
2
0.8 V 6a
5.5 V 6a
µA 6a
20
10
V9H High Level Output Voltage
V9L Low Level Output Voltage
I9 si
–I9 so
Sink Output Current
Source Output Current
V10 = 4.7V, I9 = 100µA, S1 : A,
S2 : A
V10 = 5.3V, I9 = 100µA, S1 : A,
S2 : E
V10 = 5.3V, S1 : A, S2 : B
V10 = 4.7V, S1 : A, S2 : D
3.4
0.6
100 150
100 150
V 6c
V 6c
µA 6c
µA 6c
5/13
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