MIC45205 datasheet(3/40 Pages) MICROCHIP

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DS20005798B-page 3

MIC45205

1.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings †

VPVIN, VVIN to PGND ................................................................................................................................. –0.3V to +30V

VPVDD, V5VDD, VANODE to PGND................................................................................................................. –0.3V to +6V

VSW, VFREQ, VILIM, VEN to PGND....................................................................................................–0.3V to (VIN + 0.3V)

VBST to VSW................................................................................................................................................. –0.3V to +6V

VBST to PGND............................................................................................................................................ –0.3V to +36V

VPG to PGND ............................................................................................................................... –0.3V to (5VDD + 0.3V)

VFB, VRIB to PGND ...................................................................................................................... –0.3V to (5VDD + 0.3V)

PGND to GND........................................................................................................................................... –0.3V to +0.3V

Operating Ratings ‡

Supply Voltage (VPVIN, VVIN) ..................................................................................................................... +4.5V to +26V

Output Current ..............................................................................................................................................................6A

Enable Input (VEN) ..............................................................................................................................................0V to VIN

Power Good (VPG) .......................................................................................................................................... 0V to 5VDD

† Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the device at those or any other conditions above those indicated

in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended

periods may affect device reliability.

‡ Notice: The device is not guaranteed to function outside its operating ratings.

ELECTRICAL CHARACTERISTICS

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

Power Supply Input

Input Voltage Range

VIN, PVIN

4.5

—

Quiescent Supply Current

(MIC45205-1)

—

0.35

0.75

VFB = 1.5V

Quiescent Supply Current

(MIC45205-2)

—

2.1

VFB = 1.5V

Operating Current

IIN

—

VPVIN = VIN = 12V, VOUT = 1.8V,

IOUT = 0A

fSW = 600 kHz (MIC45205-2)

Shutdown Supply Current

ISHDN

—

0.1

µA

SW = unconnected, VEN = 0V

5VDD Output

5VDD Output Voltage

5VDD

4.8

5.1

5.4

VIN = 7V to 26V, I5VDD = 10 mA

5VDD UVLO Threshold

UVLO

3.8

4.2

4.6

V5VDD rising

5VDD UVLO Hysteresis

UVLO_HYS

—

400

—

V5VDD falling

LDO Load Regulation

Δ5VDD(LR)

0.6

3.6

I5VDD = 0 mA to 40 mA

Reference

Feedback Reference Voltage

VREF

0.792

0.8

0.808

TJ = +25°C

0.784

0.8

0.816

–40°C ≤ TJ ≤ +125°C

FB Bias Current

IFB_BIAS

—

500

VFB = 0.8V

Enable Control

EN Logic Level High

ENHIGH

1.8

—

EN Logic Level Low

ENLOW

—

0.6

—

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