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LTC1876 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC1876
Description  High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1876 Datasheet(HTML) 7 Page - Linear Technology

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LTC1876
7
1876fa
TEMPERATURE (
°C)
–50
–25
0
4
10
0
50
75
1876 G19
2
8
6
25
100
125
TEMPERATURE (
°C)
–50
200
250
350
25
75
1876 G20
150
100
–25
0
50
100
125
50
0
300
VFREQSET = 5V
VFREQSET = OPEN
VFREQSET = 0V
TEMPERATURE (
°C)
–50
3.40
3.45
3.50
25
75
1876 G21
3.35
3.30
–25
0
50
100
125
3.25
3.20
TEMPERATURE (
°C)
–50
–25
0
0.5
1.5
2.0
2.5
75
100
50
4.5
1876 G22
1.0
0
25
125
3.0
3.5
4.0
LATCH ARMING
LATCHOFF
THRESHOLD
SHUTDOWN PIN VOLTAGE (V)
0
15
20
25
3
5
1876 G23
10
5
0
12
4
30
35
40
6
TA = 25°C
TA = 100°C
TEMPERATURE (
°C)
–50
3.6
3.8
3.9
4.0
4.1
4.2
4.3
0
50
1876 G24
4.4
4.5
4.6
3.7
100
VIN = 5V
VFB = 1.3V
NOT SWITCHING
VIN = 3.3V
TEMPERATURE (
°C)
–50
1.22
1.23
1.24
1.25
1.26
1.28
–25
025
50
1876 G25
75
100
1.27
TYPICAL PERFOR A CE CHARACTERISTICS
EXTVCC and Switch Resistance vs
Temperature
Undervoltage Lockout vs
Temperature (Controller)
Oscillator Frequency vs
Temperature (Controller)
Shutdown Latch Thresholds vs
Temperature
Shutdown Pin Current (IAUXVFB)
Quiescent Current for Auxillary
Regulator
Feedback Pin Voltage (AUXVFB)
Current Limit for Auxillary
Regulator
Auxillary Regulator Switch
Oscillator Frequency
TEMPERATURE (
°C)
–50 –30 –10
1.05
1.10
1.15
1.20
1.25
1.35
10
30
50
70
90
110
1876 G28
1.30
DUTY CYCLE (%)
10
0.8
1.2
90
1876 G26
0.4
0
30
50
70
20
40
60
80
1.6
0.6
1.0
0.2
1.4



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