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LTC3621 Datasheet(PDF) 4 Page - Linear Technology

Part # LTC3621
Description  17V, 1A Synchronous Step-Down Regulator with 3.5關A Quiescent Current
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3621 Datasheet(HTML) 4 Page - Linear Technology

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LTC3621/LTC3621-2
4
3621f
For more information www.linear.com/LTC3621
Typical perForMance characTerisTics
Burst Mode Operation
Pulse-Skipping Mode Operation
Load Step
Soft-Start Operation
Efficiency vs Input Voltage
Oscillator Frequency
vs Temperature
Efficiency vs Load Current
(Burst Mode Operation)
VIN Supply Current
vs Input Voltage
Efficiency vs Load at Dropout
Operation
TJ = 25°C, unless otherwise noted.
INPUT VOLTAGE (V)
0
3
4
5
16
3621 G02
2
1
0
2
4
6
8 10 12 14
18 20
SLEEP
SD
3621 G04
SW
5V/DIV
4µs/DIV
VOUT
AC-COUPLED
50mV/DIV
IL
500mA/DIV
VIN = 12V
VOUT = 3.3V
Burst Mode OPERATION
IOUT = 50mA
L = 2.2µH
3621 G07
RUN
5V/DIV
PGOOD
2V/DIV
VOUT
1V/DIV
IL
0.5A/DIV
400µs/DIV
3621 G05
SW
5V/DIV
VOUT
AC-COUPLED
50mV/DIV
IL
500mA/DIV
VIN = 12V
VOUT = 3.3V
PULSE SKIP MODE
IOUT = 10mA
L = 2.2µH
4µs/DIV
3621 G06
ILOAD
500mA/DIV
VOUT
100mV/DIV
IL
500mA/DIV
VIN = 12V
VOUT = 3.3V
ILOAD = 0.05A
40µs/DIV
LOAD CURRENT (A)
3621 G01
100
90
80
70
60
50
40
30
20
10
0
0.001
0.1
1
0.01
VIN = 12V
FREQUENCY = 2.25MHz
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
LOAD CURRENT (A)
3621 G03
100
90
80
70
60
50
40
30
20
10
0
0.0001
0.001
0.1
1
0.01
VIN = 5V
FREQUENCY = 2.25MHz
FORCED
CONTINUOUS
MODE
Burst Mode
OPERATION
TEMPERATURE (°C)
–50
2.30
2.35
2.45
2.50
2.40
25
75
3621 G09
2.25
2.20
–25
0
50
100
125
2.15
2.05
2.00
2.10
INPUT VOLTAGE (V)
0
70
5
96
3621 G08
10
15
20
94
92
90
88
86
84
82
80
78
76
74
72
VOUT = 2.5V
ILOAD = 10mA
ILOAD = 1A



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