MIC24045 datasheet(5/46 Pages) MICROCHIP

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 2016 Microchip Technology Inc.

DS20005568A-page 5

MIC24045

LS Current Limit 3

ILIM_LS3

5.0

6.2

8.5

OC Events Count for Hiccup

INHICC_DE

—15—

Clock

Cycles

Number of subsequent cycles in

current limit before entering hiccup

overload protection.

Hiccup Wait Time

tHICC_WAIT

—13.5V/

SS_SRx

—

Duration of the high-Z state on LX

before new soft-start.

SS_SRx = SS_SR0, SS_SR1,

SS_SR2, SS_SR3

Power Switches

Low Side FET ON Resistance

RLS

—16



VIN =VINLDO =VDDP =VDDA =5V,

VBST-VLX =5V, TA =TJ =+25°C

High Side FET ON Resistance

RHS

—38



VIN =VINLDO =VDDP =VDDA =5V,

VBST-VLX =5V, TA =TJ =+25°C

Pulse-Width Modulation (PWM)

Minimum LX ON Time

TON(MIN)

—26—

TA =TJ =+25°C

Minimum LX OFF time

TOFF(MIN)

145

190

VIN =VINLDO =VDDA =5V,

VOUTSNS = 3V, 400 kHz setting,

VOUT =3.3V,

TA =TJ =+25°C

Minimum Duty Cycle

DMIN

—0—

VOUTSNS >1.1 xVOUT(NOM)

Gm Error Amplifier

Error-Amplifier

Transconductance

GmEA

—1.4

—

Error-Amplifier DC Gain

AEA

—

50000

—

V/V

Error-Amplifier Source Current

ISR

—

400

—

µA

Error-Amplifier Sink Current

ISNK

—

400

—

µA

COMP Output Swing High

COMP_H

—

2.5

—

COMP Output Swing Low

COMP_L

—

0.8

—

COMP-to-Inductor Current

Transconductance

GmPS

—12.5—

A/V

VOUT =1.2V, IOUT =4A

Output Voltage DC Accuracy

Minimum Programmable Out-

put Voltage

MinOut

—

0.64

—

Maximum Programmable Out-

put Voltage

MaxOut

—

5.25

—

LSB for range 0.640V to

1.280V

LSB1

—

LSB for range 1.290V to

1.950V

LSB2

—

LSB for range 1.980V to 3.42V

LSB3

—

LSB for range 4.75V to 5.25V

LSB4

—

Output Voltage Accuracy for

Ranges 1 and 2

OutErr12

-1

—

4.75V

 VIN  19V,

VOUT = 0.64V to 1.95V

TA =TJ = -40°C to +125°C,

IOUT =0A

ELECTRICAL CHARACTERISTICS (Note 1)

Electrical Specifications:

unless otherwise specified, VIN =VINLDO = 12V; CVDDA =2.2 µF, CVDDP = 2.2 µF, TA =+25°C.

Boldface

values indicate -40°C

 TJ  +125°C.

Parameter

Symbol

Min.

Typ.

Max.

Units

Test Conditions

Note 1:

Specification for packaged product only.

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