參數(shù)資料
型號： L4964
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 4 A SWITCHING REGULATOR, 120 kHz SWITCHING FREQ-MAX, PZFM15
封裝： VERTICAL, PLASTIC, MULTIWATT-15
文件頁數(shù)： 9/13頁
文件大小： 1058K
代理商： L4964
ELECTRICAL CHARACTERISTICS
(refer to the test circuits Tj = 25
oC, Vi = 25V, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
Fig.
DYNAMIC CHARACTERISTICS (pin 6 to GND unless otherwise specified)
Vo
Output Voltage Range
Vi = 36V, Io = 1A
Vref
28V4
Vi
Input Voltage Range
Vo = Vref to 28V, Io = 3A
9
36
V
4
Vo
Line Regulation
Vi = 10V to 30V, Vo = Vref, Io = 2A
15
70
mV
4
Vo
Load Regulation
Io = 1A to 2A
Io = 0.5A to 3A, Vo = Vref
10
15
30
50
mV
4
Vref
Internal Reference Voltage (Pin 10) Vi = 9V to 36V, Io = 2A
4.95
5.1
5.25
V
4
Vref
T
Average Temperature Coefficient
of Reference Voltage
Tj = 0
°C to 125°C, Io = 2A
0.4
mV/
°C
Vd
Dropout Voltage between Pin 2
and Pin 3
Io = 3A
Io = 2A
2
1.5
3.2
2.4
V
4
Iom
Maximum Operating Load Current
VI = 9V to 36V, Vo = Vref to 28V
4
A
4
I2L
Current Limiting Threshold (Pin 2)
Vi = 9V to 36V, Vo = Vref to 28V
4.5
8
A
4
ISH
Input Average Current
Vi = 36V, Output Short-circuited
80
140
mA
4
η
Efficiency
Io = 3A
Vo = Vref
Vo = 12V
75
85
%
4
SVR
Supply Voltage Ripple Rejection
VI = 2Vrms, fripple = 100Hz
Vo = Vref, Io = 2A
46
56
–
dB
4
f
Switching Frequency
40
50
60
kHz
4
f
Vi
Voltage Stability of Switching
Frequency
Vi = 9V to 36V
0.5
%
4
f
Tj
Temperature Stability of Switching
Frequency
Tj = 0
°C to 125°C1
%
4
fmax
Maximum Operating Switching
Frequency
Vo = Vref, Io = 1A
120
kHz
–
Tsd
Thermal Shutdown Junction
Temperature
135
145
°C–
DC CHARACTERISTICS
I3Q
Quiescent Drain Current
Vi = 36V, V7 = 0V, S1 : B, S2 : B
V6 = 0V
V6 = 3V
66
30
100
50
mA
6a
–I2L
Output Leakage Current
Vi = 36V, V6 = 3 V, V7 = 0V
S1 : B, S2 : A
2mA
6a
SOFT START
I5so
Source Current
V6 = 0V, V5 = 3V
80
130
180
A6b
I5si
Sink Current
V6 = 3V, V5 = 3V
40
70
140
A6b
INHIBIT
V6L
Low Input Voltage
Vi = 9V to 36V, V7 = 0V
S1 : B, S2 : B
- 0.3
0.8
V
6a
V6H
High Input Voltage
2
5.5
V
6a
– I6L
–I6H
Input Current with Input Voltage
Low Level
High Level
Vi = 9V to 36V, V7 = 0V
S1 : B, S2 : B
V6 = 0.8V
V6 = 2V
20
10
A6a
ERROR AMPLIFIER
V9H
High Level Output Voltage
V10 = 4.7V, I9 = 100
A, S1 : A,
S2 : A
3.4
V
6c
V9L
Low Level Output Voltage
V10 = 5.3V, I9 = 100
A, S1 : A,
S2 : E
0.6
V
6c
I9 si
Sink Output Current
V10 = 5.3V, S1 : A, S2 : B
100
150
A6c
–I9 so
Source Output Current
V10 = 4.7V, S1 : A, S2 : D
100
150
A6c
L4964
5/13
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