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LT1432CN8-3.3 Datasheet(PDF) 5 Page - Linear Technology

Part # LT1432CN8-3.3
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

LT1432CN8-3.3 Datasheet(HTML) 5 Page - Linear Technology

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5
LT1432-3.3
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
No Load Battery Current in Burst
Mode Operation
Transconductance – VOUT to VC
Current
Burst Mode Operation Load
Regulation
Incremental Battery Current * in
Burst Mode Operation
BATTERY VOLTAGE (V)
0
1.0
1.5
20
LT1432-3.3 G10
0.5
0
5
10
15
25
2.0
* TO CALCULATE TOTAL BATTERY CURRENT IN Burst
Mode OPERATION, MULTIPLY LOAD CURRENT BY
INCREMENTAL FACTOR AND ADD NO-LOAD CURRENT.
TJ = 25°C
BATTERY VOLTAGE (V)
0
3
4
5
20
LT1432-3.3 G11
2
1
0
5
10
15
25
TJ = 25°C
JUNCTION TEMPERATURE (
°C)
0
3000
4000
100
LT1432-3.3 G12
2000
1000
25
50
75
5000
Gm =
∆I(VC PIN)
∆VOUT
Restart Load Current
Line Regulation
Mode Pin Current
Restart Time Delay
Start-up Switch Characteristics
MODE PIN VOLTAGE (V)
0
20
40
60
8
LT1432-3.3 G15
0
–20
–40
2
4
6
10
MODE DRIVE MUST
SINK
≈ 30µA AT 0V
TJ = 25°C
LOAD CURRENT (mA)
0
–25
0
80
–50
–75
20
40
60
100
25
LT1432-3.3 G14
TJ = 25°C
VIN = 7V
JUNCTION TEMPERATURE (
°C)
0
20
30
100
LT1432-3.3 G16
10
0
25
50
75
40
VOUT = 4.5V
JUNCTION TEMPERATURE (
°C)
0
2
3
100
LT1432-3.3 G16
1
0
25
50
75
4
V+ TO VIN VOLTAGE
–2
–20
0
5
20
LT1432-3.3 G18
–40
–60
–80
–1
0
10
30
TJ = 25°C
NOTE VERTICAL AND
HORIZONTAL SCALE
CHANGES AT 0,0
0
0
20
20
LT1432-3.3 G13
–20
–40
5
10
15
40
Burst Mode OPERATION
NORMAL MODE
INPUT VOLTAGE (V)
TJ = 25°C


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