LTC1879 LINER [Linear Technology], LTC1879 Datasheet - Page 5

• Manufacturer Part Number: LTC1879
• Description: 1.2A Synchronous Step-Down Regulator with 15mA Quiescent Current
• Manufacturer: LINER [Linear Technology]

100mV/DIV
TYPICAL PERFOR A CE CHARACTERISTICS
1A/DIV
V
OUT
I
L
200mA/DIV
Load Step (Burst Mode Operation)
V
V
L = 4.7 H
50mV/DIV
IN
OUT
= 5V
5V/DIV
= 2.5V
V
OUT
SW
I
L
Burst Mode Operation
V
V
L = 4.7 H
IN
OUT
C
C
I
LOAD
IN
OUT
= 5V
= 2.5V
= 20 F
50 s/DIV
= 47 F
= 50mA to 1200mA
C
C
I
LOAD
IN
OUT
W
= 20 F
25 s/DIV
= 47 F
= 15mA
U
1879 G15
100mV/DIV
1A/DIV
1879 G18
V
OUT
I
L
Load Step
(Pulse Skipping Mode)
V
V
L = 4.7 H
IN
OUT
= 5V
= 2.5V
C
C
I
LOAD
IN
OUT
= 20 F
50 s/DIV
= 47 F
= 50mA to 1200mA
200mA/DIV
20mV/DIV
5V/DIV
V
OUT
SW
1879 G16
I
L
Pulse Skipping Mode Operation
V
V
L = 4.7 H
IN
OUT
= 5V
= 2.5V
500mA/DIV
RUN/SS
1V/DIV
I
VIN
C
C
I
LOAD
IN
OUT
Soft-Start with Shorted Output
V
V
L = 4.7 H
= 20 F
2.5 s/DIV
IN
OUT
= 47 F
= 15mA
= 5V
= 0V
C
C
I
LOAD
IN
OUT
= 20 F
5ms/DIV
= 47 F
= 0A
LTC1879
1879 G17
5
1879f
1879 G19