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LTC3549 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3549
Description  250mA Low VIN Buck Regulator in 2mm3mm DFN
Download  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3549 Datasheet(HTML) 5 Page - Linear Technology

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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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