LTC1627 Linear Technology, LTC1627 Datasheet - Page 4

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

TYPICAL PERFOR A CE CHARACTERISTICS
LTC1627
AC COUPLED
4
500mA/DIV
1800
1600
1400
1200
1000
50mV/DIV
360
350
340
320
800
400
390
380
370
330
310
300
600
200
0.5V/DIV
0
– 50
– 50
I
V
LOAD
Switch Leakage Current
vs Temperature
OUT
Oscillator Frequency
vs Temperature
I
TH
V
V
V
V
IN
SYNC/FCB
IN
DR
– 25
– 25
Load Step Transient Response
V
V
L = 15 H
C
C
I
Burst Mode OPERATION
= 5V
= 8.4V
LOAD
= 0V
IN
OUT
IN
OUT
= 5V
= 22 F
= 3.3V
= 100 F
= 0mA TO 500mA
= 0V
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25 s/DIV
SYNCHRONOUS
50
50
SWITCH
75
75
W
SWITCH
100
100
MAIN
1627 G10
1627 G13
U
125
125
1627 G16
AC COUPLED
500mA/DIV
50mV/DIV
0.5V/DIV
390
380
370
360
350
340
330
320
300
310
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
I
0
V
LOAD
– 50
2.5
OUT
I
TH
Oscillator Frequency
vs Input Voltage
Switch Resistance
vs Temperature
V
V
V
SYNC/FCB
IN
DR
Load Step Transient Response
V
V
L = 15 H
C
C
I
FORCED CONTINUOUS MODE
LOAD
– 25
IN
OUT
IN
OUT
= 5V
3.5
= 0V
SYNCHRONOUS
= 5V
= 22 F
= 3.3V
= 100 F
= 0mA TO 500mA
= 0V
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
4.5
SWITCH
25
5.5
25 s/DIV
MAIN
SWITCH
50
6.5
75
7.5
100
1627 G11
1627 G14
1627 G17
125
8.5
AC COUPLED
200mA/DIV
20mV/DIV
1100
1000
5V/DIV
700
600
400
900
800
500
200
300
0.9
0.7
0.6
0.5
0.4
0.2
0.8
0.3
0.1
I
V
LOAD
0
SW
OUT
2.5
2.5
Maximum Output Load Current
vs Input Voltage
Switch Resistance
vs Input Voltage
V
MAIN SWITCH
Burst Mode Operation
V
V
L = 15 H
C
C
I
DR
LOAD
IN
OUT
IN
OUT
= 0V
= 5V
= 22 F
3.5
3.5
= 3.3V
= 100 F
= 50mA
V
DR
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= –V
4.5
4.5
SYNCHRONOUS SWITCH
IN
10 s/DIV
5.5
5.5
6.5
6.5
V
DR
V
L = 15 H
= 0V
OUT
7.5
7.5
= 2.5V
1627 G12
1627 G15
1627 G18
8.5
8.5