LTC1879 LINER [Linear Technology], LTC1879 Datasheet - Page 4

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

LTC1879
TYPICAL PERFOR A CE CHARACTERISTICS
4
804
803
802
801
800
799
798
797
796
795
794
20
18
16
14
12
10
8
6
4
2
0
–50
–50
Switch Leakage vs Temperature
Reference Voltage
vs Temperature
V
V
IN
IN
–25
–25
= 10V
= 6V
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
SYNCHRONOUS
100
90
80
70
60
50
40
30
20
10
0
0.1
50
50
Efficiency vs Output Current
V
MAIN SWITCH
SWITCH
IN
= 7.2V
75
75
W
1
OUTPUT CURRENT (mA)
100
100
V
V
1879 G07
1879 G10
IN
IN
V
= 7.2V
U
IN
= 4.2V
125
125
10
= 4.2V
V
L = 6.2 H
Burst Mode OPERATION
PULSE SKIPPING MODE
OUT
= 3.1V
100
100
90
80
70
60
50
40
30
50
45
40
35
20
15
10
30
25
5
0
0.1
0
Switch Leakage vs Input Voltage
Efficiency vs Output Current
RUN = 0V
T
A
V
1879 G13
1000
IN
= 25 C
= 3.6V
V
IN
2
= 10V
1
OUTPUT CURRENT (mA)
V
IN
INPUT VOLTAGE (V)
V
IN
= 7.2V
= 5V
4
SYNCHRONOUS SWITCH
10
V
L = 6.2 H
Burst Mode OPERATION
MAIN SWITCH
OUT
= 1.8V
6
100
100
90
70
50
40
30
80
60
8
2
Efficiency vs Input Voltage
1879 G11
1879 G08
1000
V
L = 6.2 H
Burst Mode OPERATION
OUT
10
1mA
= 2.5V
4
100mA
INPUT VOLTAGE (V)
2.47
2.41
2.51
2.50
2.49
2.48
2.46
2.45
2.44
2.43
2.42
100
90
80
70
60
50
40
30
0.1
6
0
Output Voltage vs Load Current
Efficiency vs Output Current
PULSE SKIPPING MODE
V
L = 6.2 H
IN
V
10mA
200
0.1mA
IN
= 5V
V
= 3.6V
IN
= 10V
400
1
8
V
OUTPUT CURRENT (mA)
LOAD CURRENT (mA)
IN
= 7.2V
V
600
IN
1879 G14
= 5V
10
800 1000
V
L = 6.2 H
Burst Mode OPERATION
10
OUT
= 2.5V
100
1200 1400 1600
1879 G09
1879 G12
1000
1879f