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