MIC45205 datasheet(4/40 Pages) MICROCHIP

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MIC45205

DS20005798B-page 4



2017 - 2022 Microchip Technology Inc.

EN Hysteresis

ENHYS

—

200

—

EN Bias Current

IENBIAS

—

µA

VEN = 12V

Oscillator

Switching Frequency

fSW

400

600

750

kHz

VFREQ = VIN, IOUT = 2A

—

350

—

VFREQ = 50% VIN, IOUT = 2A

Maximum Duty Cycle

DMAX

—

Minimum Duty Cycle

DMIN

—

VFB = 1V

Minimum Off-Time

tOFF(MIN)

140

200

260

—

Soft-Start

Soft-Start Time

tSS

—

VFB from 0V to 0.8V

Short-Circuit Protection

Current-Limit Threshold

VCL_

OFFSET

–30

–14

VFB = 0.79V

Short-Circuit Threshold

VSC

–23

–7

VFB = 0V

Current-Limit Source Current

ICL

µA

VFB = 0.79V

Short-Circuit Source Current

ISC

µA

VFB = 0V

Leakage

SW, BST Leakage Current

ISW_

LEAKAGE

—

µA

—

FREQ Leakage Current

IFREQ_

LEAK

—

µA

—

Power Good (PG)

PG Threshold Voltage

VPG_TH

% VREF Sweep VFB from Low-to-High

PG Hysteresis

VPG_HYS

—

% VREF Sweep VFB from High-to-Low

PG Delay Time

tPG_DLY

—

100

—

µs

Sweep VFB from Low-to-High

PG Low Voltage

VPG_LOW

—

200

VFB < 90% × VNOM, IPG = 1 mA

Thermal Protection

Overtemperature Shutdown

TSHD

—

160

—

°C

TJ rising

Overtemperature Shutdown

Hysteresis

TSHD_

HYS

—

°C

—

Note 1: Specification for packaged product only.

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics: VIN = VEN = 12V, VOUT = 3.3V, VBST – VSW = 5V, TJ = +25ºC. Bold values indicate –40ºC

< TJ < +125ºC, unless otherwise noted. Note 1

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

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