MAX8952AEWE-T 데이터 시트보기 (PDF) - Maxim Integrated

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MAX8952AEWE-T

2.5A Step-Down Regulator with Remote Sense in 2mm x 2mm WLP

Maxim Integrated 

MAX8952

2.5A Step-Down Regulator

with Remote Sense in 2mm x 2mm WLP

SYNC

VDD

SCL

SDA

IN1

EN

VID0

VID1

AGND

OSC

CLOCK GEN

I2C INTERFACE

PWM LOGIC

VOLTAGE

VDAC

IN1

CONTROL, VREF,

BIAS, ETC.

IN2

LX

PGND

SNS+

SNS-

Figure 1. Block Diagram

Detailed Description

The MAX8952 high-efficiency, 3.25MHz step-down

switching regulator delivers up to 2.5A of output cur-

rent. The device operates from a 2.5V to 5.5V input

voltage range, and the output voltage is I2C program-

mable from 0.77V to 1.40V in 10mV increments.

Remote sense ensures precise DC regulation at the

load. Total output error is less than ±1.5% over load,

line, and temperature.

Dynamic Voltage Scaling

The output voltage is dynamically adjusted by use of

the VID0 and VID1 logic inputs, allowing selection

between four predefined operation modes/voltage

configurations.

For each of the different output modes, the following

parameters are programmable:

• Output voltage from 0.77V to 1.40V in 10mV steps

• Mode of operation: Forced PWM or power save

• Enable/disable of synchronization of switching

frequency to external clock source

The relation between the VID0/VID1 and operation

mode is given by Table 1.

The VID_ inputs have internal pulldown resistors. These

pulldown resistors can be disabled through the CON-

TROL register after the IC is enabled, achieving lowest

possible quiescent current. When EN is low, the CON-

TROL register is reset to default, enabling the pulldown

resistors.

Table 1. VID0 and VID1 Configuration

VID1

VID0

MODE

I2C REGISTER

0

0

0

1

1

0

1

1

Maxim Integrated

MODE0

MODE1

MODE2

MODE3

Table 3

Table 4

Table 5

Table 6

DEFAULT

SWITCHING

MODE

POWER SAVE

POWER SAVE

POWER SAVE

POWER SAVE

DEFAULT

SYN C H R O N IZ A TIO N

OFF

OFF

OFF

OFF

DEFAULT

OUTPUT

VOLTAGE (V)

1.40

1.00

1.40

1.10

11

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