LTC3422 Просмотр технического описания (PDF) - Linear Technology

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LTC3422

1.5A, 3MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

Linear Technology 

LTC3422

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V, RT = 28k, unless otherwise noted. (Note 2)

PARAMETER

SHDN Input High

SHDN Input Low

SHDN Input Current

Error Amp Transconductance

Soft-Start Current Source

BURST Threshold Voltage

CONDITIONS

VOUT = 0V (Turn-On Threshold, Initial Start-Up)

VOUT > 2.4V (Stay-On Threshold)

Turn-Off Threshold

VSHDN = 3.3V

VSS = 1V

Falling Edge, Sensed at the BURST Pin

MIN TYP MAX UNITS

1

V

0.65

V

0.25

V

●

0.01

1

µA

50

µS

–5

–2.4 –1.2

µA

0.79 0.88 0.97

V

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

reliabilty and lifetime.

Note 2: The LTC3422E is guaranteed to meet performance specifications

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: Once VOUT is greater than 2.4V, the LTC3422 is not dependent on

the VIN supply.

Note 4: Current is measured into the VOUT pin since the supply current is

bootstrapped to the output. The current will reflect to the input supply by

(VOUT/VIN) • Efficiency. The outputs are not switching.

Note 5: 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 specified maximum operating junction

temperature may impair device reliability.

3422fa

3

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