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
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
VMODE
POR
VRUN
IRUN
PARAMETER
Mode Threshold Low
Mode Threshold High
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
RUN Threshold
RUN Leakage Current
CONDITIONS
MIN TYP MAX
VOUT1, VFB2 Ramping Down, MODE/SYNC = 0V
0
0 .5
VIN – 0.5
VIN
–8.5
100
200
262,144
l 0.3
1
1.5
l
0.01
1
UNITS
V
V
%
Ω
Cycles
V
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3548-2 is guaranteed to meet specified performance from
0°C to 85°C. Specifications over the – 40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
Note 3: The LTC3548-2 is tested in a proprietary test mode that connects
the output of the error amplifier to an outside servo loop.
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: TJ is calculated from the ambient TA and power dissipation PD
according to the following formula: TJ = TA + (PD • θJA).
Note 6: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified.
Burst Mode Operation
Pulse-Skipping Mode
Load Step
SW
5V/DIV
IL
200mA/
DIV
VOUT
20mV/DIV
SW
5V/DIV
IL
200mA/DIV
VOUT
10mV/DIV
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
2μs/DIV
VOUT = 1.8V
ILOAD = 60mA
CHANNEL 1; CIRCUIT OF FIGURE 3
35482 G01
VIN = 3.6V
1μs/DIV
VOUT = 1.8V
ILOAD = 30mA
CHANNEL 1; CIRCUIT OF FIGURE 3
35482 G02
VIN = 3.6V
20μs/DIV
VOUT = 1.8V
ILOAD = 80mA TO 800mA
CHANNEL 1; CIRCUIT OF FIGURE 3
35482 G03
35482fb
3
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