LTC1878 LINER [Linear Technology], LTC1878 Datasheet - Page 4

• Manufacturer Part Number: LTC1878
• Description: High Efficiency Monolithic Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

LTC1878
TYPICAL PERFOR A CE CHARACTERISTICS
4
605
595
585
575
565
555
545
535
525
515
505
495
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
95
90
85
80
75
70
65
–50
0.1
0
Efficiency vs Output Current
Oscillator Frequency
vs Supply Voltage
R
DS(ON)
–25
SYNCHRONOUS SWITCH
MAIN SWITCH
V
IN
V
1
OUTPUT CURRENT (mA)
vs Temperature
2
= 6V
IN
0
SUPPLY VOLTAGE (V)
TEMPERATURE ( C)
V
= 3V
IN
V
IN
= 4.2V
25
= 3.6V
10
4
50
V
IN
75
100
V
L = 10 H
= 3V
W
6
OUT
V
IN
100
= 1.8V
= 5V
1878 G10
1878 G04
1878 G07
U
1000
125
8
0.814
0.809
0.804
0.799
0.794
0.789
0.784
1.83
1.82
1.81
1.80
1.79
1.77
150
1.78
250
200
100
50
0
–50
0
Reference Voltage
Reference Voltage
vs Temperature
vs Temperature
Output Voltage vs Load Current
0
DC Supply Current
vs Input Voltage
V
V
PULSE SKIPPING MODE
V
L = 10 H
OUT
IN
IN
100
–25
= 3.6V
= 3.6V
= 1.8V
1
200
LOAD CURRENT (mA)
2
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
300
25
400 500
3
PULSE SKIPPING
OPERATION
Burst Mode
50
4
MODE
600 700 800
75
5
100
6
1878 G08
1878 G11
1878 G05
125
900
7
605
595
585
575
565
555
545
535
525
515
505
495
300
250
200
150
100
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.9
50
0
0
–50
–50
0
Oscillator Frequency
vs Temperature
R
DC Supply Current
vs Temperature
V
V
DS(ON)
IN
IN
–25
= 3.6V
–25
= 3.6V
1
vs Input Voltage
2
0
0
SWITCH
TEMPERATURE ( C)
TEMPERATURE ( C)
INPUT VOLTAGE (V)
MAIN
3
PULSE SKIPPING
25
25
OPERATION
Burst Mode
SYNCHRONOUS
SWITCH
4
MODE
50
50
5
75
75
6
100
100
7
1878 G09
1878 G06
1878 G12
125
125
8