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LTC3561 Datasheet(PDF) 13 Page - Linear Technology

Part # LTC3561
Description  1A, 4MHz, Synchronous Step-Down DC/DC Converter
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3561 Datasheet(HTML) 13 Page - Linear Technology

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LTC3561
13
3561f
ILOAD (mA)
1
40
80
90
100
10
100
1000
3561 TA03
70
60
50
0
40
50
60
30
20
10
VIN = 3.3V
VOUT = 1.2V
EFFICIENCY
VOUT RIPPLE
TYPICAL APPLICATIO S
Figure 6. General Purpose Buck Regulator Using Ceramic Capacitors
SVIN
LTC3561
SW
PVIN
VFB
ITH
SHDN/RT
L1
2.2
µH
VIN
2.63V TO
5.5V
VOUT
1.8V/2.5V/3.3V
AT 1A
R4
324k
R1A
280k
R3
13k
3561 F07a
C3
1000pF
C4 22pF
R2 887K
C2
22
µF
R1B
412k
R1C
698k
C1
10
µF
PGND
SGND
NOTE: IN DROPOUT, THE OUTPUT TRACKS THE INPUT VOLTAGE
C1, C2: TAIYO YUDEN JMK325BJ226MM
L1: TOKO A914BYW-2R2M (D52LC SERIES)
3.3V
2.5V
1.8V
Small Footprint Buck
LOAD CURRENT (mA)
1
0
30
20
10
60
50
40
100
90
80
70
10
100
1000
3561 F07b
VIN = 3.3V
VOUT = 2.5V
fO = 1MHz
Efficiency vs Load Current
Efficiency and VOUT Ripple
PVIN
LTC3561
PGND
SW
SVIN
SGND
VFB
ITH
SHDN/RT
L1
2.2
µH
D1
1.2V
AT 1.0A
VIN
2.63V
TO 5.5V
R4
324k
C4
22pF
R2
100k
R1
200k
R3
10k
3561 TA02
C3
470pF
C1: AVX 06034D106M
C2: AVX 08054D226M
L1: SUMIDA CDRH2D18/HP-2R2
C2
22
µF
C1
10
µF



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