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LT1432-3.3 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1432-3.3
Description  3.3V High Efficiency Step-Down Switching Regulator Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1432-3.3 Datasheet(HTML) 4 Page - Linear Technology

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4
LT1432-3.3
Shutdown Current vs Input
Voltage
Battery Current in Shutdown*
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
Minimum Input Voltage to Start –
Normal Mode (Diode to Input)
Efficiency vs Input Voltage
Efficiency vs Load Current
Minimum Running Voltage –
Normal Mode*
Burst Mode Operation Minimum
Input Voltage
Minimum Input Voltage –
Normal Mode (Diode to Output)
Current Limit Sense Voltage*
INPUT VOLTAGE (V)
0
60
70
80
90
100
510
15
20
LT1432-3.3 G01
25
30
TJ = 25°C
LT1271, L = 50
µH
DIODE TO INPUT
IOUT = 1A
DIODE TO OUTPUT
0
75
80
85
90
95
0.5
1.0
1.5
2.0
LT1432-3.3 G02
2.5
3.0
TJ = 25°C
VIN = 7V
LOAD CURRENT (A)
LT1270
LT1271
INPUT VOLTAGE (V)
0
0
10
20
30
40
50
5
10
15
20
LT1432-3.3 G07
25
30
TJ = 25°C
TEMPERATURE (
°C)
0
20
30
100
LT1432-3.3 G08
10
0
25
50
75
40
VIN = 6V
VIN = 30V
*DOES NOT INCLUDE LT1271 SWITCH LEAKAGE.
JUNCTION TEMPERATURE (
°C)
0
60
70
100
LT1432-3.3 G9
50
40
25
50
75
80
* TEMPERATURE COEFFICIENT OF SENSE VOLTAGE IS
DESIGNED TO TRACK COPPER RESISTANCE.
OUTPUT CURRENT (A)
0
4.5
5.0
5.5
4
LT1432-3.3 G05
4.0
3.5
3.0
1
2
3
5
TJ = 25°C
LT1271
LT1270
LT1171
*SEE MINIMUM INPUT VOLTAGE TO START
LOAD CURRENT (mA)
0
4.5
5.0
40
LT1432-3.3 G06
4.0
3.5
10
20
30
50
5.5
TJ = 25°C
OUTPUT CURRENT (A)
0
5.5
6.0
6.5
4
LT1432-3.3 G03
5.0
4.5
4.0
1
2
3
5
TJ = 25°C
LT1171
LT1271
LT1270
DIODE
TO INPUT
OUTPUT CURRENT (A)
0
7.0
8.0
9.0
4
LT1432-3.3 G04
6.0
5.0
4.0
1
2
3
5
TJ = 25°C
LT1171
LT1271
DIODE
TO INPUT


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