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LTC3852 데이터시트(PDF) 7 Page - Linear Technology

부품명 LTC3852
상세설명  Low Input Voltage, Synchronous Step-Down DC/DC Controller
PDF  32 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC3852 데이터시트(HTML) 7 Page - Linear Technology

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LTC3852
7
3852f
TYPICAL PERFORMANCE CHARACTERISTICS
Controller Oscillator Frequency
vs Temperature
Controller Undervoltage Lockout
Threshold (INTVCC) vs Temperature
Shutdown Input DC Supply Current
vs Input Voltage Controller Only
Shutdown Input DC Supply Current
vs Temperature Controller Only
Input DC Supply Current
vs Temperature Controller Only
TEMPERATURE (°C)
–50
600
700
900
25
75
3852 G22
500
400
–25
0
50
100
125
300
200
800
RFREQ = 36k
RFREQ = 60k
RFREQ = 160k
TEMPERATURE (°C)
–50
–25
0
2
5
0
50
75
3852 G24
1
4
3
25
100
125
INTVCC RAMPING UP
INTVCC RAMPING DOWN
INPUT VOLTAGE (V)
0
5
10
15
20
25
30
35
20
30
40
3852 G25
10
0
40
15
25
5
35
TEMPERATURE (°C)
–50
35
25
3852 G26
20
10
–25
0
50
5
0
40
30
25
15
75
100
125
TEMPERATURE (°C)
–50
2.0
2.5
3.0
25
75
3852 G27
1.5
1.0
–25
0
50
100
125
0.5
0
Maximum Current Sense
Threshold vs INTVCC Voltage
INTVCC VOLTAGE(V)
3.2 3.4 3.6
0
10
30
40
50
4.4 4.6 4.8
90
3852 G28
20
3.8 4.0 4.2
5.0
60
70
80
Charge Pump Oscillator
Frequency vs Supply Voltage
SUPPLY VOLTAGE (V)
1.5
1.50
1.25
1.00
0.75
0.50
0.25
0
2.0
2.5
3.0
3.5
4.0
4.5
3852 G29
Charge Pump Oscillator
Frequency vs Temperature
TEMPERATURE ( C)
–50
1.4
1.3
1.2
1.1
1.0
0.9
0.8
–20
10
40
70
100
130
3852 G30
VIN = 4.5V
VIN = 2.4V
Charge Pump SHDN Threshold
Voltage vs Supply Voltage
0.7
0.8
0.6
0.5
0.9
SUPPLY VOLTAGE (V)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
3852 G31
HIGH-TO-LOW THRESHOLD
LOW-TO-HIGH THRESHOLD



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