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