LTC1771IS8 Linear Technology, LTC1771IS8 Datasheet - Page 4

• Manufacturer Part Number: LTC1771IS8
• Description: IC CTRLR DC/DC STEPDOWN HE 8SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1771IS8

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 18 V
• Current - Output: 5A
• Voltage - Input: 2.8 ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

LTC1771
TYPICAL PERFOR A CE CHARACTERISTICS
4
–0.2
–0.6
–0.8
1.24
1.22
1.21
–0.4
–1.0
1.25
1.23
0.4
0.2
8
6
4
2
0
0
–50
0
0
Load Regulation
Shutdown Quiescent Current
vs Input Voltage
Reference Voltage
vs Temperature
FIGURE 1 CIRCUIT
V
IN
2
= 10V
–25
4
0.5
Burst Mode
OPERATION
ENABLED
TEMPERATURE ( C)
6
INPUT VOLTAGE (V)
LOAD CURRENT (A)
Burst Mode OPERATION
DISABLED
T
0
T
A
T
A
A
= –50 C
8
= 100 C
= 25 C
1.0
10
25
12
50
14
1.5
W
16
V
V
IN
IN
75
= 15V
= 5V
1771 G04
18
1771 G07
1771 G10
U
100
2.0
20
100mV/DIV
INDUCTOR
CURRENT
1A/DIV
V
200
150
100
OUT
50
0
5
4
3
2
1
0
0
Active Mode Quiescent Current
vs Input Voltage
Run/SS Current vs Input Voltage
0
Load Step Transient Response
V
V
I
FIGURE 1 CIRCUIT
LOAD
IN
OUT
= 10V
2
2
= 3.3V
= 100mA TO 2A
4
4
6
INPUT VOLTAGE (V)
6
INPUT VOLTAGE (V)
T
T
A
A
8
8
= 100 C
= –50 C
50 s/DIV
T
T
T
10
A
A
10
A
= –50 C
= 100 C
= 25 C
12
12
T
14
A
14
= 25 C
16
16
18
1771 G05
18
1771 G11
1771 G08
20
20
INDUCTOR
50mV/DIV
CURRENT
0.5A/DIV
V
–50
200
150
100
OUT
12
10
50
8
6
4
2
0
0
–50
0
Current Sense Voltage
vs Temperature
Sleep Quiescent Current
vs Input Voltage
Burst Mode Operation
V
V
I
FIGURE 1 CIRCUIT
LOAD
V
IN
OUT
IN
= 10V
2
= 10V
= 3.3V
= 100mA
–25
4
BURST THRESHOLD
6
INPUT VOLTAGE (V)
TEMPERATURE ( C)
0
T
A
MAXIMUM
8
MINIMUM
= 100 C
10 s/DIV
T
A
10
25
= 25 C
12
T
50
A
14
= –50 C
16
75
18
1771 G06
1771 G09
1771 G12
100
20