MIC24053 datasheet(4/32 Pages) MICROCHIP

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MIC24053

DS20005668A-page 4

 2015 Microchip Technology Inc.

Reference

Feedback Reference Voltage

0.792

0.8

0.808

0°C

 TJ  85°C (±1.0%)

0.788

0.8

0.812

40°C  TJ  125°C (±1.5%)

Load Regulation

—

0.25

—

IOUT = 0A to 9A (Continuous

Mode)

Line Regulation

—

0.25

—

VIN = 4.5V to 19V

FB Bias Current

—

VFB = 0.8V

Enable Control

EN Logic Level High

1.8

——

—

EN Logic Level Low

——

0.6

—

EN Bias Current

—6

μA

VEN = 12V

Oscillator

Switching Frequency (Note 2)

450

600

750

kHz

VOUT = 2.5V

Maximum Duty Cycle (Note 3)

—

VFB = 0V

Minimum Duty Cycle

—

VFB = 1.0V

Minimum Off-Time

—

300

—

Soft-Start

Soft-Start Time

—

Short-Circuit Protection

Peak Inductor Current-Limit

Threshold

12.5

VFB = 0.8V, TJ = 25°C

11.25

VFB = 0.8V, TJ = 125°C

Short-Circuit Current

—

VFB = 0V

Internal FETs

Top-MOSFET RDS(ON)

—27

—

mΩ

ISW = 3A

Bottom-MOSFET RDS(ON)

—

10.5

—

mΩ

ISW = 3A

SW Leakage Current

——

μAVEN = 0V

VIN Leakage Current

——

μAVEN = 0V

Power Good (PG)

PG Threshold Voltage

%VOUT Sweep VFB from Low to High

PG Hysteresis

—

5.5

—

%VOUT Sweep VFB from High to Low

PG Delay Time

—

100

—

μs

Sweep VFB from Low to High

PG Low Voltage

—

200

Sweep VFB  0.9  VNOM,

IPG = 1 mA

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics:

Unless otherwise indicated, PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C. Bold

values indicate –40°C ≤ TJ ≤ +125°C

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1:

Specification for packaged product only.

Measured in test mode.

The maximum duty-cycle is limited by the fixed mandatory off-time (tOFF) of typically 300 ns.

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