ADP1053ACPZ-R7 datasheet(4/84 Pages) AD

4 / 84 page

ADP1053

Data Sheet

Rev. A | Page 4 of 84

The ADP1053 provides local and remote differential sensing

of the output voltage, which is converted to the digital domain

using high speed, high resolution Σ-Δ converters. The proprie-

tary conversion system maximizes the bandwidth of the converter

and minimizes output noise due to digital quantization error,

thus dramatically reducing the power consumption of the digital

controller.

Configurable compensation networks provide three poles and

two zeros to control feedback loop stability and optimize output

response. In addition, a programmable feedforward feature can

be enabled to enhance input voltage response.

The ADP1053 provides extensive protection and monitoring

capabilities. For example, each regulated output has its own

independent voltage threshold, and overvoltage protection is

provided for each regulated output. The protection and moni-

toring features combine to eliminate the possibility of a single

point of failure.

Fast overcurrent protection is provided to protect the system

from short circuits. Accurate current sensing and overcurrent

limit protections are also included. In addition, two overtemp-

erature protection circuits are provided for use with 100 kΩ

thermistors to sense the hot spots.

Other protection and monitoring features include a program-

mable power-on (PSON) function and power-good monitoring

for Channel A and Channel B.

All these features are programmable through the PMBus/I2C

interface. This interface is also used for calibration. Additional

information, such as input current, output current, and fault

flag status, can be read via the PMBus/I2C interface.

The built-in EEPROM is used to store programmed values and

instructions. System reliability is improved through a built-in

checksum and redundancy of critical circuits. In the event of a

system fault, the EEPROM can be configured to capture the first

instance of failure; this stored fault data can be analyzed to improve

overall system reliability and reduce failure mode analysis time.

The ADP1053 is designed to maximize ease of use and reduce

time to market with the provision of a comprehensive, easy to

use graphical user interface (GUI) that allows programming of

most parameters and protection and monitoring limits.

The ADP1053 is available in a 40-lead LFCSP package and

operates from a single 3.3 V supply.

FUNCTIONAL BLOCK DIAGRAM

ADP1053

ADC

DAC

PWM

ENGINE

DIGITAL CORE

1.2V

ADC

CS1_A

CS1_B

OUT1

8kBYTE

EEPROM

I2C

INTERFACE

CS2+_A CS2–_A

CS2–_B CS2+_B

VS+_A VS–_A

VS–_B VS+_B

OVP_A PGND_A

PGND_B OVP_B

OUT3

OUT4

OUT2

OUT5

OUT6

OUT7

OUT8

PGOOD_A

FLGI/SYNI

FLGO/SYNO

PSON_A

PSON_B

PGOOD_B

RTD2

RTD1 ADD

ADC

ACSNS

ADC

UVLO

LDO

OSC

VREF

RES

VDD

DGND

VCORE

AGND

SDA

SCL

Figure 2.

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