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PDF L4964HT Data sheet ( Hoja de datos )
| Número de pieza | L4964HT | |
| Descripción | HIGH CURRENT SWITCHING REGULATOR | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L4964HT (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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L4964
HIGH CURRENT SWITCHING REGULATOR
. 4 A OUTPUT CURRENT
. 5.1 V TO 28 V OUTPUT VOLTAGE RANGE
. 0 TO 100 % DUTY CYCLE RANGE
. PRECISE (± 3 %) ON-CHIP REFERENCE
. SWITCHING FREQUENCY UP TO 120 KHz
. VERY HIGH EFFICIENCY (UP TO 90 %)
. VERY FEW EXTERNAL COMPONENTS
. SOFT START
. RESET OUTPUT
. CURRENT LIMITING
. INPUT FOR REMOTE INHIBIT AND SYN-
CHRONUS PWM
. THERMAL SHUTDOWN
MUL TIW AT T15 Vertical
(Plastic Package)
ORDERING NUMBER : L4964
DESCRIPTION
The L4964 is a stepdown power switching regulator
delivering 4A at a voltage variable from 5.1V to 28V.
Features of the device include overload protection,
soft start, remote inhibit, thermal protection, a reset
output for microprocessors and a PWM comparator
input for synchronization in multichip configurations.
The L4964 is mounted in a 15-lead Multiwatt® plas-
tic power package and requires very few external
components.
Efficient operation at switching frequencies up to
120kHz allows a reductionin the size and cost of ex-
ternal filter components.
PIN CONNECTION (top view)
MULTIWATT15 Horizontal
(Plastic Package)
ORDERING NUMBER : L4964HT
April 1993
Pins 1, 4, 15 must not be connected. Leave open circuit.
1/13
1 page  
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
Input Voltage Range
Vo = Vref to 28V, Io = 3A
9 36 V
Line Regulation
Vi = 10V to 30V, Vo = Vref, Io = 2A
15 70 mV
Load Regulation
Io = 1A to 2A
Io = 0.5A to 3A, Vo = Vref
10 30
15 50
mV
mV
Internal Reference Voltage (Pin 10) Vi = 9V to 36V, Io = 2A
4.95 5.1 5.25 V
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
Maximum Operating Load Current
Current Limiting Threshold (Pin 2)
Input Average Current
Efficiency
Supply Voltage Ripple Rejection
Switching Frequency
Voltage Stability of Switching
Frequency
Io = 3A
Io = 2A
VI = 9V to 36V, Vo = Vref to 28V
Vi = 9V to 36V, Vo = Vref to 28V
Vi = 36V, Output Short-circuited
Io = 3A
Vo = Vref
Vo = 12V
∆VI = 2Vrms, fripple = 100Hz
Vo = Vref, Io = 2A
Vi = 9V to 36V
2 3.2
1.5 2.4
4
4.5 8
80 140
75
85
46 56 –
V
V
A
A
mA
%
%
dB
40 50 60
0.5
kHz
%
Temperature Stability of Switching Tj = 0°C to 125°C
Frequency
1%
Maximum Operating Switching
Frequency
Thermal Shutdown Junction
Temperature
Vo = Vref, Io = 1A
120
135 145
kHz
°C
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
–
–
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
5 Page 
MULTIWATT15 (Vertical) PACKAGE MECHANICAL DATA
Dimensions
A
B
C
D
E
F
G
G1
H1
H2
L
L1
L2
L3
L4
L7
M
M1
S
S1
Dia. 1
Min.
0.49
0.66
1.14
17.57
19.6
22.1
22
17.65
17.25
10.3
2.65
4.2
4.5
1.9
1.9
3.65
Millimeters
Typ.
1
1.27
17.78
17.5
10.7
4.3
5.08
Max.
5
2.65
1.6
0.55
0.75
1.4
17.91
20.2
22.6
22.5
18.1
17.75
10.9
2.9
4.6
5.3
2.6
2.6
3.85
Min.
0.019
0.026
0.045
0.692
0.772
0.870
0.866
0.695
0.679
0.406
0.104
0.165
0.177
0.075
0.075
0.144
Inches
Typ.
0.039
0.050
0.700
0.689
0.421
0.169
0.200
L4964
Max.
0.197
0.104
0.063
0.022
0.030
0.055
0.705
0.795
0.890
0.886
0.713
0.699
0.429
0.114
0.181
0.209
0.102
0.102
0.152
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet L4964HT.PDF ] | |
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