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LTC1771 датащи(PDF) 13 Page - Linear Technology

номер детали LTC1771
подробное описание детали  10mA Quiescent Current High Efficiency Step-Down DC/DC Controller
PDF  16 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC1771 датащи(HTML) 13 Page - Linear Technology

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13
LTC1771
RUN/SS
ITH
VFB
GND
1
2
3
4
8
7
6
5
MODE
SENSE
VIN
PGATE
LTC1771
1000pF
Si3443DV
D1
1771 TA01
L1
22
µH
RSENSE
0.1
Ω
CIN
33
µF
16V
VIN
3.3V
TO 12V
VOUT
2.5V
1A
+
0.01
µF
5pF
220pF
10k
1.02M
1%
CIN: AVX TPSC336M016R0300
COUT: SANYO POSCAP 6TPB150M
D1: MICROSEMI UPS5817
L1: SUMIDA CDRH6D38-220
1M
1%
COUT
150
µF
6.3V
+
3.3V to 2.5V/1A Regulator with Burst Mode Operation Enabled
Low Dropout 5V/2A Regulator with Burst Mode Operation Disabled
RUN/SS
ITH
VFB
GND
1
2
3
4
8
7
6
5
MODE
SENSE
VIN
PGATE
LTC1771
1000pF
Si6447DQ
D1
1771 TA04
L1
22
µH
RSENSE
0.05
Ω
CIN
22
µF
25V
×2
VIN
5.5V
TO 18V
VOUT
5V
2A
+
0.01
µF
15pF
330pF
10k
3.09M
1%
1M
1%
COUT
150
µF
6.3V
+
CIN: AVX TPSD226M025R0200
COUT: SANYO POSCAP 6TPB150M
D1: MICROSEMI UPS5817
L1: SUMIDA CR75-220
TYPICAL APPLICATIO S
APPLICATIO S I FOR ATIO
With a 0.05
Ω sense resistor ISC(AVG) = 2A will result,
increasing the 0.5V Schottky diode dissipation to 1W.
CIN is chosen for a RMS current rating of at least 1A at
temperature. COUT is chosen with an ESR of 0.05Ω for low
output ripple. The output voltage ripple due to ESR is
approximately:
VORIPPLE ≈ (RESR)(∆IL) = 0.05Ω (0.89AP-P) = 45mVP-P



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