LTC3548EDD-2 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3548EDD-2
Linear Technology
'LTC3548EDD-2' PDF : 16 Pages View PDF
LTC3548-2
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN Voltages .................................................– 0.3V to 6V
VOUT1, VFB2 Voltages........................ –0.3V to VIN + 0.3V
RUN1, RUN2 Voltages .................................–0.3V to VIN
MODE/SYNC Voltage........................ –0.3V to VIN + 0.3V
SW1, SW2 Voltages......................... –0.3V to VIN + 0.3V
POR Voltage................................................. –0.3V to 6V
Ambient Operating Temperature Range
(Note 2)....................................................– 40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range...................– 65°C to 125°C
PIN CONFIGURATION
TOP VIEW
VOUT1 1
RUN1 2
VIN 3
SW1 4
GND 5
10 VFB2
9 RUN2
11
8 POR
7 SW2
6 MODE/
SYNC
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W, θJC = 3°C/W (4-LAYER BOARD)
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB GND
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING PACKAGE DESCRIPTION
LTC3548EDD-2#PBF
LTC3548EDD-2#TRPBF
LCDK
10-Lead (3mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, unless otherwise specified. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
Operating Voltage Range
l 2.5
5.5
V
IFB2
Feedback Pin Input Current
l
30
nA
VFB2
Feedback Voltage of Channel 2 (Note 3) 0°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 85°C
0.588 0.6 0.612
V
l 0.585 0.6 0.612
V
VOUT1
Output Voltage of Channel 1 (Note 3)
0°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 85°C
1.764 1.8 1.836
V
l 1.755 1.8 1.836
V
ΔVLINEREG Reference Voltage Line Regulation
VIN = 2.5V to 5.5V (Note 3)
0.3
0.5
%/V
ΔVLOADREG Output Voltage Load Regulation
(Note 3)
0.5
%
IS
Input DC Supply Current (Note 4)
Active Mode
VOUT1 = 1.5V, VFB2 = 0.5V
Sleep Mode
VOUT1 = 1.9V, VFB2 = 0.63V, MODE/SYNC = 3.6V
Shutdown
RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V
700
950
μA
40
60
μA
0.1
1
μA
fOSC
Oscillator Frequency
VOUT1 = 1.8V, VFB2 = 0.6V
l 1.8
2.25
2.7
MHz
fSYNC
Synchronization Frequency
2.25
MHz
ILIM
Peak Switch Current Limit Channel 1
VIN = 3V, Duty Cycle <35%
Peak Switch Current Limit Channel 2
VIN = 3V, VFB2 = 0.5V, Duty Cycle <35%
0.95
1.2
1.6
A
0.6
0.7
0.9
A
RDS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
(Note 6)
(Note 6)
0.35 0.45
Ω
0.30 0.45
Ω
ISW(LKG)
Switch Leakage Current
VIN = 5V, VRUN = 0V, VFB2 = 0V, VOUT1 = 0V
0.01
1
μA
35482fb
2
Share Link: 