LTC3548-2 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3548-2
Linear Technology
'LTC3548-2' PDF : 16 Pages View PDF
LTC3548-2
PACKAGE DESCRIPTION
Low Ripple Buck Regulators Using Ceramic Capacitors
VIN
2.5V TO 5.5V
C1
10μF
VOUT2
2.5V
400mA
L2
10μH
C5 68pF
RUN2 VIN RUN1
POR
LTC3548-2
SW2
SW1
R5
100k
POWER-ON
RESET
L1
4.7μH
VOUT1
1.8V
800mA
C3
10μF
R2
887k
R1
280k
VFB2
VOUT1
MODE/SYNC GND
C1, C2, C3: TDK C2012X5R0J106M
L1: SUMIDA CDRH2D18/HP-4R7NC
L2: SUMIDA CDRH2D18/HP-100NC
C2
10μF
35482 TA01
Efficiency vs Load Current
100
95
90
85
80
75
70
65
60
10
VOUT2 = 2.5V
VOUT1 = 1.8V
VIN = 3.3V
PULSE-SKIPPING MODE
100
LOAD CURRENT (mA)
1000
35482 TA01b
1mm Profile Core and I/O Supplies
VIN
3.6V TO 5.5V
C1*
10μF
VOUT2
3.3V
400mA
L2
4.7μH
C5 68pF
RUN2 VIN RUN1
MODE/SYNC
POR
LTC3548-2
SW2
SW1
R5
100k
POWER-ON
RESET
L1
2.2μH
VOUT1
1.8V
800mA
C3
R2
4.7μF 887k
VFB2
R1
196k
VOUT1
GND
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.
C2
10μF
35482 TA02a
Efficiency vs Load Current
100
95
90
85
80
75
70
65
60
1
VOUT2 = 3.3V
VOUT1 = 1.8V
VIN = 5V
Burst Mode OPERATION
10
100
LOAD CURRENT (mA)
1000
35482 TA02b
35482fb
14
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