 2022 Microchip Technology Inc. and its subsidiaries

DS20006704A-page 5

LX7220

Load Regulation

—

—

–0.23

—

%/A

ILOAD = 0A to 5A. Note 1

VOUT Input Current

—

—

0

1

μA

VOUT Undervoltage Threshold

VOUV

77

82

85

%VREF

VOUT below this threshold will

initiate a hiccup sequence

SW

High Side on Resistance

RDSON_H

—22

—

mΩ

VIN = 5V

Low Side on Resistance

RDSON_L

—13

—

mΩ

VIN = 5V

Current Limit

OCP

7.5

8.5

10

A

Note 1

Thermal Shut Down Threshold

TSH

—

150

—

°C

Note 1

Hysteresis

TH

—20

—

°C

Note 1

PWM Switching Frequency

FSW

1

1.2

1.4

MHz

SW Discharge Resistance

RSWDISC

80

200

1400

Ω

EN = low, Discharge: Ctrl2(4) = 1

EN, SDA (as input), SCL

Input High

VIH

1.1

——

V

Input Low

VIL

——

0.4

V

Hysteresis

VH

0.05

0.15

—

V

Input Current

III

—0

1.1

μA

Low Level Output Voltage

VOL

0

—

0.2 ×

VDD

V

Logic0 output voltage, Isink = 2 mA

(Note 1)

Low Level Output Current

IOL

3—

—

mA

VOL = 0.4V (Note 1)

PGOOD

PGOOD VOUT

Lower Threshold

VPG90

82

85

88

%VREF VOUT rising, percentage of VREF

PGOOD VOUT

Upper Threshold

VPG110

105

110

115

%VREF VOUT falling, percentage of VREF

Hysteresis

VPGHY

—5

—

%VREF Percentage of VREF

PGOOD Pull Down Resistance

PGRDSON

—13

20

Ω

PGOOD Leakage Current

—

—

0

1

μA

PGOOD Delay

—

27

45

69

ms

PGOOD rising edge delay

7 Bit DAC

Differential Linearity

—

—

—

0.8

LSB

Monotonicity assured by design

Note 1: Guaranteed by design.

TEMPERATURE SPECIFICATIONS (Note 1)

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Package Thermal Resistance

Thermal Resistance, VQFN

JA

—50

—

°C/W

Note 1: The

JA numbers assume no forced airflow. Junction Temperature is calculated using TJ = TA + (PD x JA).

In particular,

JAis a function of the PCB construction. The stated number above is for a four-layer board in

accordance with JESD-51 (JEDEC).

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics: Unless otherwise indicated, TA = 25°C, VIN = VEN = 5V, SDA = SCL = 5V, default register

settings. Bold specifications apply over the TA range of -40°C to +85°C.

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions