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LTC1878 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1878
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

LTC1878 Datasheet(HTML) 5 Page - Linear Technology

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LTC1878
TYPICAL PERFOR A CE CHARACTERISTICS
Switch Leakage vs Temperature
TEMPERATURE (
°C)
–50
25
1878 G13
2.0
1.0
–25
0
50
0.5
0
2.5
1.5
75
100
125
MAIN
SWITCH
VIN = 7V
RUN = 0V
SYNCHRONOUS
SWITCH
10
µs/DIV
VIN = 4.2V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 50mA
SW
5V/DIV
IL
200mA/DIV
VOUT
50mV/DIV
AC
COUPLED
1878 G14
Burst Mode Operation
Switch Leakage vs Input Voltage
INPUT VOLTAGE (V)
0
0
0.2
0.4
0.6
0.8
24
6
8
1878 G20
1.0
1.2
13
5
7
SYNCHRONOUS
SWITCH
MAIN
SWITCH
RUN = 0V
Pulse Skipping Mode Operation
1
µs/DIV
VIN = 4.2V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 50mA
SW
5V/DIV
IL
200mA/DIV
VOUT
20mV/DIV
AC
COUPLED
1878 G15
40
µs/DIV
VIN = 3.6V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 500mA
RUN
2V/DIV
IL
500mA/DIV
VOUT
1V/DIV
1878 G16
40
µs/DIV
VIN = 3.6V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 200mA TO 500mA
PULSE SKIPPING MODE
VOUT
50mV/DIV
AC
COUPLED
IL
500mA/DIV
ITH
1V/DIV
1878 G17
Start-Up from Shutdown
Load Step Response
Load Step Response
40
µs/DIV
VIN = 3.6V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 50mA TO 500mA
PULSE SKIPPING MODE
VOUT
100mV/DIV
AC
COUPLED
IL
500mA/DIV
ITH
1V/DIV
1878 G18
Load Step Response
40
µs/DIV
VIN = 3.6V
VOUT = 1.5V
L = 10
µH
CIN = 22µF
COUT = 47µF
ILOAD = 50mA TO 500mA
Burst Mode OPERATION
VOUT
100mV/DIV
AC
COUPLED
IL
500mA/DIV
ITH
1V/DIV
1878 G19



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