LTC1539 LINER [Linear Technology], LTC1539 Datasheet - Page 5

• Manufacturer Part Number: LTC1539
• Description: Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.
100
0.4
0.2
0.1
0.5
0.3
2.5
2.0
1.5
1.0
0.5
95
90
85
80
75
70
0
0
0
0
Input Supply Current
vs Input Voltage
0
V
Load Current
Efficiency vs Input Voltage:
V
V
R
V
IN
OUT
OUT
OUT
SENSE
5V ON, 3.3V OFF
– V
0.5
= 3.3V
5
DROP OF 5%
5
= 3.3V
= 0.033
OUT
5V, 3.3V ON
INPUT VOLTAGE (V)
LOAD CURRENT (A)
INPUT VOLTAGE (V)
1.0
10
10
Dropout Voltage vs
I
LOAD
1.5
15
15
= 1A
5V OFF, 3.3V ON
I
LOAD
2.0
20
20
5V STANDBY
5V, 3.3V OFF
= 100mA
LTC1538/39 • TPC07
W
2.5
25
1538/39 • G04
25
1538/39 • G01
U
3.0
30
30
100
80
60
40
20
0
– 0.25
– 0.50
– 0.75
100
–1.00
–1.25
–1.50
95
90
85
80
75
70
–1
–2
0
2
0
0
1
Efficiency vs Input Voltage:
V
0
0
INTV
vs INTV
Load Regulation
OUT
EXTV
5
= 5V
0.5
CC
CC
10
INTV
Regulation
CC
= 0V
I
INPUT VOLTAGE (V)
LOAD
10
LOAD CURRENT (A)
1.0
Load Current
CC
LOAD CURRENT (mA)
= 100mA
20
15
1.5
I
LOAD
30
R
20
SENSE
2.0
= 1A
70 C
25 C
V
OUT
= 0.033
25
40
1538/39 • G02
2.5
1538/39 • G05
= 5V
1538/39 • G08
LTC1538-AUX/LTC1539
30
3.0
50
300
200
100
3.0
2.5
2.0
1.5
1.0
0.5
100
80
95
90
85
75
70
65
60
55
50
0
0
0.001
0
0
EXTV
vs INTV
V
Efficiency vs Load Current
ITH
OPERATION
Burst Mode
V
V
R
10
IN
OUT
SENSE
= 10V
Pin Voltage vs Output Current
CC
5
20
= 5V
INTV
CC
= 0.33
0.01
Switch Drop
OUTPUT CURRENT (%)
30
CC
Load Current
10
LOAD CURRENT (A)
LOAD CURRENT (mA)
40
50
15
0.1
CONTINUOUS/
Adaptive Power
MODE
Burst Mode
OPERATION
Adaptive Power
MODE
60
CONTINUOUS
MODE
20
70
70 C
25 C
1
80
– 45 C
25
TM
1538/39 • G06
1538/39 • G09
1538/39 • G03
90
TM
5
100
30
10