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LTC1775CS Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1775CS
Description  High Power 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

LTC1775CS Datasheet(HTML) 5 Page - Linear Technology

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5
LTC1775
DUTY CYCLE
0
350
300
250
200
150
100
50
0
0.6
1775 • G10
0.2
0.4
0.8
1.0
TEMPERATURE (
°C)
–40
320
310
300
290
280
35
85
1775 • G11
–15
10
60
110
135
TEMPERATURE (
°C)
–40
300
250
200
150
100
50
0
35
85
1775 • G12
–15
10
60
110
135
SYNC = 1.5V
SYNC = 0V
Maximum Current Sense Voltage
vs Duty Cycle
Maximum Current Sense Voltage
vs Temperature
Oscillator Frequency
vs Temperature
1530 G15
VOUT
50mV
/DIV
ITH
100mV
/DIV
IL
2A/DIV
VIN = 20V
VOUT = 5V
ILOAD = 100mA
FIGURE 1 CIRCUIT
20
µs/DIV
FCB Pin Current vs Temperature
RUN/SS Pin Current vs
Temperature
Burst Mode Operation
TEMPERATURE (
°C)
–40
35
85
1775 • G13
–15
10
60
110
135
0
– 0.5
– 1.0
– 1.5
– 2.0
TEMPERATURE (
°C)
–40
0
–1
–2
–3
–4
–5
35
85
1775 • G14
–15
10
60
110
135
Soft Start
1530 G16
RUN/SS
5V/DIV
VOUT
5V/DIV
IL
5A/DIV
VIN = 20V
VOUT = 5V
RLOAD = 0.5Ω
FIGURE 1 CIRCUIT
20ms/DIV
1530 G17
VOUT
100mV
/DIV
IL
5A/DIV
VIN = 20V
VOUT = 5V
ILOAD = 100mA TO 2A
FIGURE 1 CIRCUIT
200
µs/DIV
1530 G18
VOUT
100mV
/DIV
IL
5A/DIV
VIN = 20V
VOUT = 5V
ILOAD = 2A TO 8A
FIGURE 1 CIRCUIT
100
µs/DIV
Transient Response
(Burst Mode Operation)
Transient Response
TYPICAL PERFOR A CE CHARACTERISTICS



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