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LT1976BIFE Datasheet(PDF) 6 Page - Linear Technology

Part # LT1976BIFE
Description  High Voltage 1.5A, 200kHz Step-Down Switching Regulator with 100關A Quiescent Current
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1976BIFE Datasheet(HTML) 6 Page - Linear Technology

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LT1976/LT1976B
6
1976bfg
TYPICAL PERFOR A CE CHARACTERISTICS
Switch Peak Current Limit
Soft-Start Current Threshold
vs FB Voltage
Oscillator Frequency
vs FB Voltage
TEMPERATURE (
°C)
–50
1.5
2.0
2.5
3.0
3.5
–25
–0
25
50
1976 G10
75
100
150
125
FB VOLTAGE (V)
0
0
10
20
30
0.2
0.4
0.6
0.8
1976 G11
1.0
40
50
5
15
25
35
45
1.2
SOFT-START
DEFEATED
TJ = 25°C
FB VOLTAGE (V)
0
0
50
100
150
0.2
0.4
0.6
0.8
1976 G12
1.0
200
250
1.2
TJ = 25°C
Switch On Voltage (VCESAT)
LOAD CURRENT (A)
0
50
150
200
250
500
350
0.7
0.9
1976 G13
100
400
450
300
0.5
1.1
1.3
1.5
TJ = 125°C
TJ = 25°C
TJ = –50°C
INPUT VOLTAGE (V)
0
0
50
100
10
20
30
40
1976 F05
50
150
25
75
125
60
VOUT = 3.3V
TA = 25°C
LT1976 Supply Current
vs Input Voltage
LOAD CURRENT (mA)
0
5.5
6.0
6.5
1600
1976 G19
5.0
4.5
3.0
400
800
1200
200
600
1000
1400
4.0
3.5
7.5
7.0
5V START
3.3V START
5V RUNNING
3.3V RUNNING
Minimum Input Voltage
LT1976 Burst Mode Threshold
vs Input Voltage
INPUT VOLTAGE (V)
5
120
160
200
21
1975 G20
80
40
100
140
180
60
20
0
9
7
13
11
17 19
23
15
25
VOUT = 3.3V
L = 33
μH
COUT = 100μF
PGFB Threshold
1976 G08
1.16
1.08
1.04
1.00
1.20
1.12
1.14
1.06
1.02
1.18
1.10
TEMPERATURE (
°C)
–50
0
50
75
–25
25
100
150
125
PG Sink Current
1976 G08
200
100
50
0
250
150
TEMPERATURE (
°C)
–50
0
50
75
–25
25
100
150
125


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