LTC1707 LINER [Linear Technology], LTC1707 Datasheet - Page 3

• Manufacturer Part Number: LTC1707
• Description: High Efficiency Monolithic Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
1.200
1.190
1.195
1.185
1.180
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.55
2.50
2.60
100
95
90
85
80
75
– 50
– 50
Efficiency vs Input Voltage
0
Undervoltage Lockout Threshold
vs Temperature
Reference Voltage
vs Temperature
V
L = 15 H
Burst Mode OPERATION
V
OUT
IN
– 25
– 25
= 5V
= 2.5V
I
LOAD
2
0
TEMPERATURE ( C)
0
TEMPERATURE ( C)
INPUT VOLTAGE (V)
= 10mA
RAMPING UP
4
25
25
I
V
LOAD
RAMPING DOWN
IN
50
50
= 100mA
6
V
I
IN
LOAD
75
75
W
= 300mA
8
100
100
1707 G04
1707 G07
1707 G01
U
125
125
10
350
300
250
200
150
100
390
380
370
360
350
340
320
100
330
310
300
50
95
90
85
80
75
70
65
60
55
50
0
– 50
2.5
Efficiency vs Load Current
1
Oscillator Frequency
vs Temperature
DC Supply Current
vs Input Voltage
OPERATION
T
V
LOAD CURRENT = 0A
Burst Mode
V
J
OUT
IN
= 25 C
– 25
= 5V
3.5
= 1.8V
OUTPUT CURRENT (mA)
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
4.5
10
PULSE SKIPPING
PULSE SKIPPING
MODE
OPERATION
Burst Mode
25
MODE
5.5
50
100
6.5
75
V
V
L = 15 H
IN
OUT
7.5
= 3.6V
100
= 2.5V
1707 G05
1707 G08
1707 G02
1000
125
8.5
390
380
370
360
350
340
320
330
310
300
100
14
12
22
20
18
16
10
95
90
85
80
75
70
8
6
4
2.5
2.5
1
Efficiency vs Load Current
Supply Current in Shutdown
vs Input Voltage
Oscillator Frequency
vs Input Voltage
V
RUN/SS
3.5
3.5
= 0V
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
4.5
4.5
10
T
J
V
V
L = 15 H
Burst Mode OPERATION
= 25 C
IN
OUT
5.5
5.5
LTC1707
V
= 7.2V
V
IN
IN
T
= 2.5V
T
J
J
= 2.8V
= 3.6V
= 85 C
= – 40 C
100
6.5
6.5
7.5
7.5
1707 G06
1627 G09
1707 G03
3
1000
8.5
8.5