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LTC1709-7 데이터시트(PDF) 7 Page - Linear Technology

부품명 LTC1709-7
상세설명  2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator
PDF  28 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC1709-7 데이터시트(HTML) 7 Page - Linear Technology

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LTC1709-7
TYPICAL PERFOR A CE CHARACTERISTICS
Current Sense Pin Input Current
vs Temperature
EXTVCC Switch Resistance
vs Temperature
Oscillator Frequency
vs Temperature
TEMPERATURE (
°C)
–50
–25
25
29
35
0
50
75
17097 G20
27
33
31
25
100
125
VOUT = 5V
TEMPERATURE (
°C)
–50
–25
0
4
10
0
50
75
17097 G21
2
8
6
25
100
125
TEMPERATURE (
°C)
–50
200
250
350
25
75
17097 G22
150
100
–25
0
50
100
125
50
0
300
VFREQSET = 5V
VFREQSET = OPEN
VFREQSET = 0V
Undervoltage Lockout
vs Temperature
TEMPERATURE (
°C)
–50
3.40
3.45
3.50
25
75
17097 G23
3.35
3.30
–25
0
50
100
125
3.25
3.20
VRUN/SS Shutdown Latch
Thresholds vs Temperature
TEMPERATURE (
°C)
–50
–25
0
0.5
1.5
2.0
2.5
75
100
50
4.5
17097 G24
1.0
0
25
125
3.0
3.5
4.0
LATCH ARMING
LATCHOFF
THRESHOLD
RUN/SS (Pin 1): Combination of Soft-Start, Run Control
Input and Short-Circuit Detection Timer. A capacitor to
ground at this pin sets the ramp time to full current output.
Forcing this pin below 0.8V causes the IC to shut down all
internal circuitry. All functions are disabled in shutdown.
SENSE1+, SENSE2+ (Pins 2,14): The (+) Input to Each
Differential Current Comparator. The ITH pin voltage and
built-in offsets between SENSE– and SENSE+ pins in
conjunction with RSENSE set the current trip threshold.
PI FU CTIO S
SENSE1–, SENSE2– (Pins 3, 13): The (–) Input to the
Differential Current Comparators.
EAIN (Pin 4): Input to the error amplifier that compares the
feedback voltage to the internal 0.8V reference voltage.
This pin is normally connected to a resistive divider from
the output of the differential amplifier (DIFFOUT).



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