LTC1707IS8 查看數據表（PDF） - Linear Technology
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LTC1707IS8 Datasheet PDF : 16 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1707
Efficiency vs Input Voltage
100
95
ILOAD = 100mA
90
ILOAD = 300mA
ILOAD = 10mA
85
80 VOUT = 2.5V
L = 15µH
Burst Mode OPERATION
75
0
2
4
6
8
10
INPUT VOLTAGE (V)
1707 G01
Undervoltage Lockout Threshold
vs Temperature
3.00
2.95
2.90
VIN
2.85
RAMPING UP
2.80
2.75
2.70
VIN
RAMPING DOWN
2.65
2.60
2.55
2.50
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1707 G04
Reference Voltage
vs Temperature
1.200
VIN = 5V
1.195
1.190
1.185
1.180
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1707 G07
Efficiency vs Load Current
100
95
Burst Mode
90 OPERATION
85
80
PULSE SKIPPING
MODE
75
70
65
60
55
50
1
VIN = 3.6V
VOUT = 2.5V
L = 15µH
10
100
OUTPUT CURRENT (mA)
1000
1707 G02
DC Supply Current
vs Input Voltage
350
300
PULSE SKIPPING
MODE
250
200
Burst Mode
OPERATION
150
100
50
TJ = 25°C
VOUT = 1.8V
LOAD CURRENT = 0A
0
2.5 3.5 4.5 5.5 6.5
INPUT VOLTAGE (V)
7.5 8.5
1707 G05
Oscillator Frequency
vs Temperature
390
VIN = 5V
380
370
360
350
340
330
320
310
300
– 50 – 25
0 25 50 75
TEMPERATURE (°C)
100 125
1707 G08
Efficiency vs Load Current
100
VIN = 2.8V
95
90
VIN = 3.6V
85
VIN = 7.2V
80
75
70
1
VOUT = 2.5V
L = 15µH
Burst Mode OPERATION
10
100
OUTPUT CURRENT (mA)
1000
1707 G03
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)
1707 G06
Oscillator Frequency
vs Input Voltage
390
380
370
360
350
340
330
320
310
300
2.5 3.5 4.5 5.5 6.5
INPUT VOLTAGE (V)
7.5 8.5
1627 G09
3
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