LTC1159 Linear Technology, LTC1159 Datasheet - Page 4

• Manufacturer Part Number: LTC1159
• Description: High Efficiency Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1159/LTC1159-3.3/LTC1159-5
TYPICAL PERFOR
4
600
500
400
300
200
100
100
95
85
80
90
10
0
8
6
4
2
0
0
0
Efficiency vs Input Voltage
EXTV
0
EXTV
FIGURE 1 CIRCUIT
I
FIGURE 1 CIRCUIT
LOAD
5
5
CC
CC
= 1A
10
Pin Current
Switch Drop
10
5
SWITCH CURRENT (mA)
INPUT VOLTAGE (V)
I
INPUT VOLTAGE (V)
LOAD
I
15
LOAD
15
I
LOAD
= 1A
10
20
= 100mA
20
= 0
25
25
30
15
30
W
LTC1159 • TPC07
LTC1159 • TPC04
LTC1159 • TPC01
NOTE 6
NOTE 6
35
35
A
U
20
40
40
CE
C
HARA TERISTICS
–20
–40
–60
500
400
200
300
100
60
40
20
50
30
80
70
60
40
20
10
0
0
0
0
Line Regulation
V
0
Off-Time vs V
0
FIGURE 1 CIRCUIT
I
IN
FIGURE 1 CIRCUIT
LOAD
Pin Current
5
5
= 1A
C
1
LTC1159-3.3
10
10
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
NORMAL
V
OUT
2
SHDN2
20
20
= 2V
3
25
25
LTC1159-5
30
30
LTC1159 • TPC08
LTC1159 • TPC05
4
NOTE 6
NOTE 6
LT1159 • TPC02
35
35
40
40
5
–100
–20
–40
–60
–80
140
120
100
160
2.0
1.5
1.0
0.5
20
60
80
40
20
0
0
0
0
0
Load Regulation
Operating Frequency
vs (V
Current Sense Threshold Voltage
0
V
OUT
IN
0.5
= 5V
20
5
– V
(V
IN
LOAD CURRENT (A)
TEMPERATURE (°C)
OUT
– V
1.0
10
40
OUT
)
T = 0°C
T = 70°C
) VOLTAGE (V)
1.5
FIGURE 1 CIRCUIT
V
THRESHOLD
THRESHOLD
15
60
MAXIMUM
IN
MINIMUM
= 24V
T = 25°C
LTC1159 • TPC09
2.0
20
80
LTC1159 • TPC03
LTC1159 • TPC06
2.5
100
25