LTC3401 Просмотр технического описания (PDF) - Linear Technology

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LTC3401

1A, 3MHz Micropower Synchronous Boost Converter

Linear Technology 

LTC3401

ELECTRICAL CHARACTERISTICS

The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

VIN = 1.2V, VOUT = 3.3V unless otherwise noted.

PARAMETER

CONDITIONS

MIN TYP MAX

PGOOD Low Voltage

PGOOD Leakage

SHDN Input High

SHDN Input Low

IPGOOD = 1mA

VOUT = 1V, IPGOOD = 20μA

VPGOOD = 5.5V

VSHDN = VIN = VOUT

0.1

0.2

0.1

0.4

0.01

1

1

0.4

SHDN Input Current

Thermal Shutdown

VSHDN = 5.5V

0.01

1

170

UNITS

V

V

μA

V

V

μA

°C

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 LTC3401 is guaranteed to meet performance specifications

from 0°C to 70°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: Current is measured into VOUT since the supply current is

bootstrapped to the VOUT pin and in the application will reflect to the input

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

Note 4: Once the output is started, the IC is not dependant upon the VIN

supply.

TYPICAL PERFOR A CE CHARACTERISTICS

Switching Waveform on SW Pin

SW Pin and Inductor Current (IC)

in Discontinuous Mode. Ringing

Control Circuitry Eliminates High

Frequency Ringing

Transient Response 5mA to 50mA

SW

1V/DIV

50ns/DIV

IL

50mA/DIV

0A

SW

1V/DIV

0V

3401 G01

VOUT

100mV/DIV

200ns/DIV

3401 G02

50mA

IOUT

5mA

COUT = 22μF

L = 3.3μH

fOSC = 1MHz

200μs/DIV

3401 G03

3401fb

3

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