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PDF L296HT Data sheet ( Hoja de datos )
| Número de pieza | L296HT | |
| Descripción | HIGH CURRENT SWITCHINGREGULATORS | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L296
® L296P
HIGH CURRENT SWITCHING REGULATORS
. 4 A OUTPUT CURRENT
. 5.1 V TO 40 V OUTPUT VOLTAGE RANGE
. 0 TO 100 % DUTY CYCLE RANGE
. PRECISE (±2 %) ON-CHIP REFERENCE
. SWITCHING FREQUENCY UP TO 200 KHz
. VERY HIGH EFFICIENCY (UP TO 90 %)
. VERY FEW EXTERNAL COMPONENTS
. SOFT START
. RESET OUTPUT
. EXTERNAL PROGRAMMABLE LIMITING
CURRENT (L296P)
. CONTROL CIRCUIT FOR CROWBAR SCR
. INPUT FOR REMOTE INHIBIT AND
SYNCHRONUS PWM
. THERMAL SHUTDOWN
Multi watt®
(15 lead)
ORDERING NUMBERS :
L296 (Vertical)
L296HT (Horizontal)
L296P (Vertical)
L296PHT (Horizontal)
DESCRIPTION
The L296 andL296P are stepdownpowerswitching
regulators delivering 4 A at a voltage variable from
5.1 V to 40 V.
Featuresof the devices includesoft start, remotein-
hibit, thermal protection, a reset output for micro-
processors and a PWM comparator input for syn-
chronization in multichip configurations.
The L296P incudes external programmable limiting
current.
The L296 and L296P are mounted in a 15-lead Mul-
tiwatt® plasticpowerpackageand requiresvery few
external components.
Efficient operation at switching frequencies up to
200 KHz allows a reduction in the size and cost of
external filter components. A voltage sense input
and SCR drive output are provided for optional
crowbar overvoltage protection with an external
SCR.
PIN CONNECTION (top view)
June 2000
1/22
1 page  
L296 - L296P
THERMAL DATA
Symbol
Rth j-case
Rth j-amb
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Max.
Max.
Value
3
35
Unit
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(refer to the test circuits Tj = 25oC, Vi = 35V, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit Fig.
DYNAMIC CHARACTERISTICS (pin 6 to GND unless otherwise specified)
Vo
Vi
Vi
∆Vo
∆Vo
Vref
∆ Vref
∆T
Vd
I2L
ISH
η
SVR
f
∆f
∆ Vi
∆f
∆ Tj
fmax
Tsd
Output Voltage Range
Input Voltage Range
Input Voltage Range
Line Regulation
Load Regulation
Internal Reference Voltage (pin 10)
Average Temperature Coefficient
of Reference Voltage
Vi = 46V, Io = 1A
Vo = Vref to 36V, Io ≤ 3A
Note (1), Vo = VREF to 36V Io = 4A
Vi =10V to 40V, Vo = Vref, Io = 2A
Vo = Vref
Io = 2A to 4A
Io = 0.5A to 4A
Vi = 9V to 46V, Io = 2A
Tj = 0°C to 125°C, Io = 2A
Vref
9
5
Dropout Voltage Between Pin 2
and Pin 3
Current Limiting Threshold (pin 2)
Input Average Current
Efficiency
Supply Voltage Ripple Rejection
Switching Frequency
Voltage Stability of Switching
Frequency
Io = 4A
Io = 2A
L296 - Pin 4 Open,
Vi = 9V to 40V, Vo = Vref to 36V
L296P - Vi = 9V to 40V, Vo = Vref
Pin 4 Open
RIim = 22kΩ
Vi = 46V, Output Short-circuited
Io = 3 A
Vo = Vref
Vo = 12V
∆Vi = 2 Vrms, fripple = 100Hz
Vo = Vref, Io = 2A
Vi = 9V to 46V
4.5
5
2.5
50
85
Temperature Stability of Switching Tj = 0°C to 125°C
Frequency
Maximum Operating Switching
Frequency
Thermal Shutdown Junction
Temperature
Vo = Vref, Io = 1A
Note (2)
200
135
40 V
46 V
46 V
15 50 mV
10 30
15 45
mV
5.1 5.2 V
0.4 mV/°C
2 3.2
1.3 2.1
7.5
V
V
A
7
4.5
60 100
75
85
56
A
mA
%
dB
100 115
0.5
kHz
%
1%
kHz
145 °C
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 = 46V, V7 = 0V, S1 : B, S2 : B
V6 = 0V
V6 = 3V
Vi = 46V, V6 = 3V, S1 : B, S2 : A,
V7 = 0V
mA
66 85
30 40
2 mA
Note (1) : Using min. 7 A schottky diode.
(2) : Guaranteed by design, not 100 % tested in production.
5/22
5 Page 
Figure 19 : SupplyVoltage Ripple Rejection vs.
Frequency (see fig. 4).
L296 - L296P
Figure 20 : Dropout Voltage Between Pin 3 and
Pin 2 vs. Current at Pin 2.
Figure 21 : Dropout Voltage Between Pin 3 and
Pin 2 vs. Junction Temperature.
Figure 22 : Power Dissipation Derating Curve.
Figure 23 : Power Dissipation (device only) vs.
Input Voltage.
Figure 24 : Power Dissipation (device only) vs.
Input voltage.
11/22
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet L296HT.PDF ] | |
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