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LTC3549 数据表(PDF) 5 Page - Linear Technology

部件名 LTC3549
功能描述  250mA Low VIN Buck Regulator in 2mm 횞 3mm DFN
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3549 数据表(HTML) 5 Page - Linear Technology

  LTC3549 Datasheet HTML 1Page - Linear Technology LTC3549 Datasheet HTML 2Page - Linear Technology LTC3549 Datasheet HTML 3Page - Linear Technology LTC3549 Datasheet HTML 4Page - Linear Technology LTC3549 Datasheet HTML 5Page - Linear Technology LTC3549 Datasheet HTML 6Page - Linear Technology LTC3549 Datasheet HTML 7Page - Linear Technology LTC3549 Datasheet HTML 8Page - Linear Technology LTC3549 Datasheet HTML 9Page - Linear Technology Next Button
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background image
LTC3549
5
3549f
INPUT VOLTAGE (V)
1.5
0.5
1.0
1.5
5.5
3549 G08
0
–0.5
–1.5
2.5
3.5
4.5
–1.0
2.5
2.0
2.05
2.15
2.25
2.35
2.10
2.20
2.30
TEMPERATURE (
°C)
–50
–25
0
25
50
3549 G07
75
100
125
VIN = 2.7V
VIN = 1.6V
VIN = 4.2V
LOAD CURRENT (mA)
0
1.203
1.204
300
3549 G09
1.202
1.201
1.199
100
200
1.200
1.205
VOUT
PULSE SKIP
BURST
Oscillator Frequency
vs Temperature
Oscillator Frequency Shift
vs Input Voltage
Output Voltage vs Load Current
VIN = 1.6V, VOUT = 1.2V
RDS(ON) vs Input Voltage
RDS(ON) vs Temperature
Dynamic Input Current
VOUT = 1.5V, 247k
Ω Load
Dynamic Supply Current vs
Temperature, VIN = 3.6V,
VOUT = 1.5V, No Load
Switch Leakage vs Temperature
VIN = 5.5V
Switch Leakage vs Input Voltage
TYPICAL PERFOR A CE CHARACTERISTICS
(From Typical Application on the front page, except for the resistive divider resistor values)
INPUT VOLTAGE (V)
1.5
0.4
0.5
0.6
5.5
3549 G10
0.3
0.2
0
2.5
3.5
4.5
0.1
0.9
0.8
0.7
MAIN SWITCH
SYNCHRONOUS SWITCH
TEMPERATURE (
°C)
–50
–25
0
25
50
3549 G11
75
100
125
0.15
0.25
0.35
0.45
0.65
0.85
0.95
0.75
0.55
VIN = 1.6V
VIN = 2.7V
VIN = 4.2V
VIN = 1.6V
VIN = 2.7V
VIN = 4.2V
MAIN SWITCH
SYNCHRONOUS SWITCH
TEMPERATURE (
°C)
–50
–25
0
25
50
3549 G13
75
100
125
50
0
150
250
350
100
200
300
PULSE SKIP
BURST
SYNCHRONOUS SWITCH
TEMPERATURE (
°C)
–50
–25
0
25
50
3549 G14
75
100
125
50
0
150
250
100
200
MAIN SWITCH
INPUT VOLTAGE (V)
0
0.8
1.0
1.2
3549 G15
0.6
0.4
0
2
4
6
0.2
1.6
1.4
MAIN SWITCH
SYNCHRONOUS
SWITCH
INPUT VOLTAGE (V)
2.0
3.0
10000
70
60
50
40
30
20
10
0
3549 G12
100
1000
2.5
6.0
5.5
5.0
4.5
4.0
3.5
1.5
Burst Mode
OPERATION
PULSE SKIP MODE



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