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LTC3548 Datasheet(PDF) 14 Page - Linear Technology

Part # LTC3548
Description  Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3548 Datasheet(HTML) 14 Page - Linear Technology

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LTC3548
14
3548fa
TYPICAL APPLICATIO S
RUN2
VIN
VIN = 3.6V
TO 5.5V
VOUT2 = 3.3V
AT 400mA
VOUT1 = 1.8V
AT 800mA
RUN1
POR
SW1
VFB1
GND
VFB2
SW2
MODE/SYNC
LTC3548
C1*
10μF
R5
100k
POWER-ON
RESET
C4, 33pF
C5, 68pF
L1
2.2μH
L2
4.7μH
R4
887k
R2
604k
R1
301k
R3
196k
C3
4.7μF
C2
10μF
3548 TA07
C1, C2: MURATA GRM219R60J106KE19
C3: MURATA GRM219R60J475KE19
L1: COILTRONICS LPO3310-222MX
L2: COILTRONICS LPO3310-472MX
*IF C1 IS GREATER THAN 3" FROM POWER SOURCE,
ADDITIONAL CAPACITANCE MAY BE REQUIRED.
1mm Profile Core and I/O Supplies
Efficiency vs Load Current
LOAD CURRENT (mA)
1
100
95
90
85
80
75
70
65
60
10
100
1000
3548 TA08
3.3V
1.8V
VIN = 5V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL



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