ltc1876eg-trpbf Linear Technology Corporation, ltc1876eg-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc1876eg-trpbf
• Description: High Efficiency, 2-phase, Dual Synchronous Step-down Switching Controller And Step-up Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
1000
600
100
800
400
200
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
90
80
70
60
50
40
30
20
10
0
0
0.001
0
0
Efficiency vs Output Current and
Mode (Figure 1)
V
Voltage and Mode (Figure 1)
Internal 5V LDO Line Regulation
I
OPERATION
IN
LOAD
Burst Mode
Supply Current vs Input
5
5
SHUTDOWN
= 1mA
STANDBY
0.01
OUTPUT CURRENT (A)
10
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
BOTH
CONTROLLERS ON
15
15
CONSTANT
FREQUENCY
(BURST DISABLE)
0.1
FORCED
CONTINUOUS
MODE
20
20
25
25
1
W
V
V
IN
OUT
30
30
= 15V
= 5V
1876 G01
1876 G04
1876 G07
U
10
35
35
100
250
200
150
100
90
80
70
60
50
75
50
25
50
0.001
0
0
0
0
Efficiency vs Output Current
(Figure 1)
EXTV
Maximum Current Sense
Threshold vs Duty Factor
V
OUT
= 5V
CC
20
10
0.01
Voltage Drop
V
OUTPUT CURRENT (A)
IN
DUTY FACTOR (%)
= 20V
CURRENT (mA)
V
40
V
IN
20
IN
= 7V
V
= 15V
0.1
IN
= 10V
60
30
1
80
40
1876 G02
1876 G08
1876 G05
100
10
50
4.75
4.70
5.05
5.00
4.95
4.90
4.85
4.80
100
90
70
80
50
60
80
70
60
50
40
30
20
10
0
– 50
5
0
Efficiency vs Input Voltage
(Figure 1)
INTV
Voltage vs Temperature
Maximum Current Sense
Threshold vs Percent of Nominal
Output Voltage (Foldback)
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
– 25
CC
EXTV
and EXTV
25
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
CC
15
SWITCHOVER THRESHOLD
INTV
25
LTC1876
50
CC
CC
50
VOLTAGE
Switch
25
75
75
V
I
OUT
OUT
100
= 3A
1876 G03
1876 G06
1876 G09
= 5V
1876fa
5
125
100
35