MIC45404 datasheet(5/32 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS20005478A-page 5

MIC45404

Pulse-Width Modulation (PWM)

Minimum LX On Time

TON(MIN)

—26—

TA = TJ = +25°C

Minimum LX Off time

TOFF(MIN)

135

190

VIN = VDDA = 5V, OUTSNS = 3V,

FREQ = Open (400 kHz setting),

VOSET0 = VOSET1 = 0V

(3.3V setting),

TA = TJ = +25°C

Minimum Duty Cycle

DMIN

—0

—

OUTSNS > 1.1 x VOUT(NOM)

Gm Error Amplifier

Error Amplifier

Transconductance

GmEA

—1.4

—

Error Amplifier DC Gain

AEA

—50000

—V/V

Error Amplifier Source/Sink

Current

ISR_SNK

-400

—

+400

µA

TA = TJ = +25°C

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

Output Voltage Accuracy for

Ranges 1 and 2

OutErr12

-1

—

%4.75V

 VIN  19V,

VOUT = 0.7V to 1.8V,

TA = TJ = -40°C to +125°C,

IOUT = 0A

Output Voltage Accuracy for

Range 3

OutErr3

-1.5

—

1.5

%4.75V

 VIN  19V,

VOUT = 2.49V to 3.3V,

TA = TJ = -40°C to +125°C,

IOUT = 0A

Load Regulation

LoadReg

—

0.03

—

IOUT = 0A to 5A

Line Regulation

LineReg

—

0.01

—

6V < VIN <19V, IOUT = 2A

Internal Soft Start

Reference Soft Start

Slew Rate

SS_SR

—

0.42

—

V/ms VOUT = 0.7V, 0.8V, 0.9V,

1.0V, 1.2V

Power Good (PG)

PG Low Voltage

PG_VOL

—0.17

0.4

VIPG =4 mA

PG Leakage Current

PG_ILEAK

-1

0.02

µA

PG = 5V

PG Rise Threshold

PG_R

%VOUT Rising

PG Fall Threshold

PG_F

87.5

92.5

%VOUT Falling

PG Rise Delay

PG_R_DLY

—

0.45

—

VOUT Rising

PG Fall Delay

PG_F_DLY

—

µs

VOUT Falling

ELECTRICAL CHARACTERISTICS(1) (CONTINUED)

Electrical Specifications:

unless otherwise specified, VIN = 12V; CVDDA= 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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