LTC1627 Linear Technology, LTC1627 Datasheet - Page 3

• Manufacturer Part Number: LTC1627
• Description: Monolithic Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
100
100
22
20
18
16
14
12
10
95
90
85
80
75
70
95
90
85
80
75
8
6
4
2.5
0
Efficiency vs Load Current
1
Efficiency vs Input Voltage
Supply Current in Shutdown
vs Input Voltage
V
V
L = 15 H
V
Burst Mode OPERATION
RUN/SS
OUT
DR
3.5
= 0V
= 2.5V
I
LOAD
2
= 0V
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
4.5
= 10mA
10
T
4
J
V
V
L = 15 H
V
Burst Mode OPERATION
I
= 25 C
LOAD
IN
OUT
DR
5.5
V
= 7.2V
V
= 0V
IN
IN
T
= 2.5V
T
= 100mA
J
J
6
= 2.8V
= 3.6V
= 85 C
= – 40 C
I
100
6.5
LOAD
W
= 300mA
7.5
8
1627 G07
1627 G04
1627 G01
U
1000
8.5
10
0.808
0.806
0.804
0.802
0.800
0.798
0.796
0.794
0.790
0.792
2.60
2.55
2.50
2.40
2.75
2.70
2.65
2.45
2.35
2.30
100
95
90
85
80
75
70
– 50
– 50
1
Undervoltage Lockout Threshold
vs Temperature
Reference Voltage
vs Temperature
Efficiency vs Load Current
V
V
L = 15 H
Burst Mode OPERATION
V
IN
OUT
IN
– 25
– 25
= 3.6V
= 5V
= 2.5V
V
DR
OUTPUT CURRENT (mA)
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
10
= 0V
RAMPING DOWN
RAMPING UP
V
25
25
DR
V
V
= – V
IN
IN
50
50
IN
100
75
75
100
100
1627 G05
1627 G08
1627 G02
1000
125
125
0.808
0.806
0.804
0.802
0.800
0.798
0.796
0.794
0.790
0.792
400
350
300
200
550
500
450
250
150
100
100
95
90
85
80
75
70
– 50
2.5
*DOES NOT INCLUDE GATE CHARGE CURRENT
1
DC Supply Current*
vs Input Voltage
Forced Continuous Threshold
Voltage vs Temperature
Efficiency vs Load Current
V
V
L = 15 H
V
T
V
V
J
OUT
IN
OUT
DR
IN
= 25 C
– 25
= 3.6V
= 5V
= 0V
3.5
= 2.5V
= 1.8V
SYNCHRONIZED AT 525kHz
Burst Mode OPERATION
OUTPUT CURRENT (mA)
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
4.5
10
FORCED
CONTINUOUS
25
5.5
SYNCHRONIZED
AT 525kHz
LTC1627
50
OPERATION
Burst Mode
6.5
100
75
7.5
100
1627 G06
1627 G09
1627 G03
3
1000
125
8.5