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LTC1877 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC1877
Description  High Efficiency Monolithic Synchronous Step-Down Regulator
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1877 Datasheet(HTML) 4 Page - Linear Technology

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LTC1877
TYPICAL PERFORMANCE CHARACTERISTICS
OUTPUT CURRENT (mA)
0.1
10
1000
95
90
85
80
75
70
65
60
55
50
1877 • G04
1.0
100
L = 10
µH
VOUT = 2.5V
VIN = 3.6V
VIN = 10V
VIN = 7.2V
VIN = 5V
TEMPERATURE (
°C)
–50
0.814
0.809
0.804
0.799
0.794
0.789
0.784
25
75
1877 • G05
–25
0
50
100
125
VIN = 5V
TEMPERATURE (
°C)
–50
605
595
585
575
565
555
545
535
525
515
505
495
100
75
1877 • G06
–25
0
50
25
125
VIN = 5V
Efficiency vs Output Current
Reference Voltage vs
Temperature
Oscillator Frequency vs
Temperature
SUPPLY VOLTAGE (V)
0
605
595
585
575
565
555
545
535
525
515
505
495
12
10
1877 • G07
2
4
8
6
Oscillator Frequency vs Supply
Voltage
INPUT VOLTAGE (V)
0
1
357
9
1.2
1.0
0.8
0.6
0.4
0.2
0
246
8
1877 • G09
10
MAIN SWITCH
SYNCHRONOUS
SWITCH
Output Voltage vs Load Current
LOAD CURRENT (mA)
0
800
1877 • G08
200
400
600
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
2.44
2.43
PULSE SKIPPING MODE
VIN = 4.2V
L = 10
µH
RDS(ON) vs Input Voltage
INPUT VOLTAGE (V)
0
250
200
150
100
50
0
8
1877 • G11
2
4
6
10
PULSE SKIPPING MODE
Burst Mode OPERATION
VOUT = 1.8V
RDS(ON) vs Temperature
DC Supply Current vs Input
Voltage
TEMPERATURE (
°C)
–50
1.4
1.2
1.0
0.8
0.6
0.4
0.2
25
75
1877 • G10
–25
0
50
100
125
VIN = 3V
VIN = 5V
SYNCHRONOUS SWITCH
MAIN SWITCH
TEMPERATURE (
°C)
–50
300
250
200
150
100
50
0
25
75
1877 G19
–25
0
50
100
125
VIN = 5V
PULSE SKIPPING MODE
BURST MODE OPERATION
DC Supply Current vs
Temperature



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