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LTC1625CS Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1625CS
Description  No RSENSE TM Current Mode Synchronous Step-Down Switching Regulator
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1625CS Datasheet(HTML) 5 Page - Linear Technology

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LTC1625
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency
vs Temperature
FCB Pin Current vs Temperature
Maximum Current Sense Voltage
vs Temperature
Maximum Current Sense Voltage
vs Duty Cycle
DUTY CYCLE
0
100
150
0.8
1625 G10
50
0
0.2
0.4
0.5
1.0
200
TEMPERATURE (
°C)
–40
140
145
150
155
160
–15
10
35
60
1625 G11
85
110
135
TEMPERATURE (
°C)
–40
200
250
300
35
85
1625 G12
150
100
–15
10
60
110
135
50
0
SYNC = 1.5V
SYNC = 0V
TEMPERATURE (
°C)
–40
– 0.50
– 0.25
0
35
85
1625 G13
– 0.75
–1.00
–15
10
60
110
135
–1.25
–1.50
RUN/SS Pin Current
vs Temperature
TEMPERATURE (
°C)
–40
–15
–5
–3
0
10
60
85
1625 G14
–4
–1
–2
35
110
135
Soft Start:
Load Current vs Time
INDUCTOR
CURRENT
2A/DIV
RUN/SS
2V/DIV
20ms/DIV
VIN = 20V
VOUT = 5V
RLOAD = 1Ω
FIGURE 1 CIRCUIT
VIN = 20V
VOUT = 5V
ILOAD = 1A TO 4A
FIGURE 1 CIRCUIT
VOUT
50mV/DIV
200
µs/DIV
50
µs/DIV
VIN = 20V
VOUT = 5V
ILOAD = 50mA
FIGURE 1 CIRCUIT
Burst Mode Operation
VOUT
50mV/DIV
ITH
100mV/DIV
Transient Response
(Burst Mode Operation)
VOUT
50mV/DIV
500
µs/DIV
VIN = 20V
VOUT = 5V
ILOAD = 50mA TO 1A
FIGURE 1 CIRCUIT
Transient Response
1625 F07
1625 F09
1625 F06
1625 F08



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