Microchip LX7220 Handleiding

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2022 Microchip Technology Inc. and its subsidiariesDS20006704A-page 1

LX7220

Features

•Constant Frequency Hysteretic Control

•Extremely Fast Line/Load Transient Response

• I2C for Output Adjustment (3.4 Mbps)

•1.2 MHz Switching Frequency

•Extremely Low-RDSON MOSFETs

•Input Voltage Rail 2.7V to 5.5V

•Greater than 6A Output Current

•Default Power Save Mode for Light-Load

Efficiency

•UVLO, OVP, OCP

•-40°C to +85°C Ambient Temperature

•Available in VQFN 2 mm x 3 mm 14-Lead

Package

•RoHS Compliant

Applications

•High Performance HDD

•Solid-State Drive

•Data Center Applications

•Raid/Host Bus Adaptors

•Optical Transceivers

General Description

LX7220 is a digitally-controlled step-down regulator IC

with an integrated 22mΩ high-side P-channel

MOSFET and a 13 mΩ low-side N-channel MOSFET. It

features Microchip proprietary constant frequency

hysteretic control engine for near-instantaneous

correction to line/load transients. It does not require

high-ESR output capacitors and incorporates

energy-saving PSM (Power Save or Pulse Skip Mode)

at light loads, to extend battery life in mobile

applications.

LX7220 has an I2C serial interface port for output

voltage margining and monitoring if required (it can

also operate in default mode). In addition, it includes

robust fault monitoring functions.

LX7220 will operate from 2.7V to 5.5V and is available

in 0.95V or 0.9V output voltages (no voltage divider is

necessary). The output voltage can also be adjusted

with an input voltage of 5V and external voltage divider

up to 3.3V.

Package Types

VIN VIN

GND

6 7

SDA 2

GN D3

SW 4

PG 1

VIN 5

12 VOUT

11 AGND

10 EN

9 SW

8 VIN

AVIN

14

SCL

13

VINVIN

GND

67

SDA2

GND

3

SW4

PG1

VIN5

12VOUT

11AGND

10

EN

9SW

8VIN

AVIN

14

SCL

13

LX7220

Top View

14-Lead, VQFN, 2 mm x 3mm

LX7220

Bottom View

14-Lead, VQFN, 2 mm x 3 mm

2.7V to 5.5V, 6A Constant Frequency Hysteretic

Synchronous Buck Regulator with I2C

Product specificaties