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| LTC3417A-2_15 Datasheet, PDF (4/20 Pages) Linear Technology – Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator | |||
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LTC3417A-2
ELECTRICAL CHARACTERISTICS
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 LTC3417AE-2 is guaranteed to meet speciï¬ed performance
from 0°C to 85°C. Speciï¬cations over the â40°C to 85°C operating
ambient temperature range are assured by design, characterization
and correlation with statistical process controls. The LTC3417AI-2 is
guaranteed to meet performance speciï¬cations over the â40°C to 125°C
operating temperature range.
Note 3: The LTC3417A-2 is tested in feedback loop which servos VFB1 to
the midpoint for the error ampliï¬er (VITH1 = 0.6V) and VFB2 to the midpoint
for the error ampliï¬er (VITH2 = 0.6V).
Note 4: Total supply current is higher due to the internal gate charge being
delivered at the switching frequency.
Note 5: Switch on-resistance is guaranteed by design and test correlation
on the DHC package and by ï¬nal test correlation on the FE package.
Note 6: Variable frequency operation with resistor is guaranteed by design
but not production tested and is subject to duty cycle limitations.
Note 7: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the speciï¬ed maximum operating junction
temperature may impair device reliability.
Note 8: TJ is calculated from the ambient temperature, TA, and power
dissipation, PD, according to the following formula:
LTC3417AEDHC-2: TJ = TA + (PD ⢠43°C/W)
LTC3417AEFE-2: TJ = TA + (PD ⢠38°C/W)
TYPICAL PERFORMANCE CHARACTERISTICS
OUT1 Burst Mode Operation
OUT1 Pulse Skipping
Mode Operation
VOUT
20mV/DIV
VOUT
20mV/DIV
OUT1 Forced Continuous
Mode Operation
VOUT
20mV/DIV
IL
250mA/DIV
IL
250mA/DIV
IL
250mA/DIV
VIN = 3.6V
2μs/DIV
VOUT = 1.8V
ILOAD = 100mA
REFER TO FIGURE 4
3417A-2 G01
VIN = 3.6V
2μs/DIV
VOUT = 1.8V
ILOAD = 100mA
REFER TO FIGURE 4
3417A-2 G02
VIN = 3.6V
2μs/DIV
VOUT = 1.8V
ILOAD = 100mA
REFER TO FIGURE 4
3417A-2 G03
OUT2 Burst Mode Operation
VOUT
20mV/DIV
OUT2 Pulse Skipping
Mode Operation
VOUT
20mV/DIV
OUT2 Forced Continuous
Mode Operation
VOUT
20mV/DIV
IL
250mA/DIV
VIN = 3.6V
2μs/DIV
VOUT = 2.5V
ILOAD = 60mA
REFER TO FIGURE 4
4
IL
250mA/DIV
3417A-2 G04
VIN = 3.6V
2μs/DIV
VOUT = 2.5V
ILOAD = 60mA
REFER TO FIGURE 4
IL
250mA/DIV
3417A-2 G05
VIN = 3.6V
2μs/DIV
VOUT = 2.5V
ILOAD = 60mA
REFER TO FIGURE 4
3417A-2 G06
3417a2fa
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