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LT1432CS8 Datasheet(PDF) 5 Page - Linear Technology

Part # LT1432CS8
Description  5V High Efficiency Step-Down Switching Regulator Controller
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1432CS8 Datasheet(HTML) 5 Page - Linear Technology

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5
LT1432
Restart Load Current
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
No Load Battery Current in Burst
Mode
BATTERY VOLTAGE (V)
0
3
4
5
20
LT1432 G09
2
1
0
5
10
15
25
TJ = 25°C
JUNCTION TEMPERATURE (°C)
0
2000
3000
100
LT1432 G12
1000
40
25
50
75
4000
Gm =
∆I(VC PIN)
∆VOUT
Transconductance – VOUT to VC
Current
Line Regulation
Burst Mode Load Regulation
0
0
20
20
LT1432 G13
–20
–40
5
10
15
40
BURST MODE
NORMAL MODE
INPUT VOLTAGE (V)
TJ = 25°C
LOAD CURRENT (mA)
0
–25
0
80
–50
–75
20
40
60
100
25
LT1432 G14
TJ = 25°C
Mode Pin Current
JUNCTION TEMPERATURE (°C)
0
20
30
100
LT1432 G16
10
0
25
50
75
40
VOUT = 4.5V
Restart Time Delay
JUNCTION TEMPERATURE (°C)
0
2
3
100
LT1432 G16
1
0
25
50
75
4
Startup Switch Characteristics
BATTERY VOLTAGE (V)
0
1.0
1.5
20
LT1432 G10
0.5
0
5
10
15
25
2.0
* TO CALCULATE TOTAL BATTERY CURRENT IN BURST
MODE, MULTIPLY LOAD CURRENT BY INCREMENTAL
FACTOR AND ADD NO-LOAD CURRENT.
TJ = 25°C
Incremental Battery Current * in
Burst Mode
MODE PIN VOLTAGE (V)
0
20
40
60
8
LT1432 G15
0
–20
–40
2
4
6
10
MODE DRIVE MUST
SINK
≈ 30µA AT 0V
TJ = 25°C
V+ TO VIN VOLTAGE
–2
–20
0
5
20
LT1432 G18
–40
–60
–80
–1
0
10
30
TJ = 25°C
NOTE VERTICAL &
HORIZONTAL SCALE
CHANGES AT 0,0



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