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LTC1877 Datasheet(PDF) 5 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) 5 Page - Linear Technology

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LTC1877
TYPICAL PERFORMANCE CHARACTERISTICS
Start-Up from Shutdown
Burst Mode Operation
Load Step Response
Load Step Response
Load Step Response
Switch Leakage vs Input Voltage
INPUT VOLTAGE (V)
0
6
10
1877 • G13
24
8
16
14
12
10
8
6
4
2
0
RUN = 0V
MAIN SWITCH
SYNCHRONOUS
SWITCH
1877 • G15
RUN
5V/DIV
VOUT
1V/DIV
IL
500mA/DIV
VIN = 5V
VOUT = 1.5V
L = 10
µH
CIN = 10µF
COUT = 47µF
ILOAD = 500mA
50
µs/DIV
1877 • G16
ITH
1V/DIV
VOUT
50mV/DIV
AC COUPLED
IL
500mA/DIV
VIN = 5V
VOUT = 1.5V
L = 10
µH
CIN = 10µF
COUT = 47µF
ILOAD = 50mA TO 500mA
PULSE SKIPPING MODE
40
µs/DIV
1877 • G18
VOUT
50mV/DIV
AC COUPLED
IL
500mA/DIV
ITH
1V/DIV
VIN = 5V
VOUT = 1.5V
L = 10
µH
CIN = 10µF
COUT = 47µF
ILOAD = 200mA TO 500mA
PULSE SKIPPING MODE
20
µs/DIV
TEMPERATURE (
°C)
–50
1400
1200
1000
800
600
400
200
0
25
75
1877 • G12
–25
0
50
100
125
VIN = 10V
RUN = 0V
MAIN SWITCH
SYNCHRONOUS
SWITCH
Switch Leakage vs Temperature
1877 • G14
SW
5V/DIV
VOUT
20mV/DIV
AC COUPLED
IL
200mA/DIV
VIN = 5V
VOUT = 1.5V
CIN = 10µF
L = 10
µH
COUT = 47µF
ILOAD = 50mA
10
µs/DIV
1877 • G17
VOUT
50mV/DIV
AC COUPLED
IL
500mA/DIV
ITH
1V/DIV
VIN = 5V
VOUT = 1.5V
L = 10
µH
CIN = 10µF
COUT = 47µF
ILOAD = 50mA TO 500mA
Burst Mode OPERATION
10
µs/DIV
10
µs/DIV
40
µs/DIV



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