Analog Devices: ADP1853-EVALZ Evaluation Board for ADP1853 Step-Down DC-to-DC Controller

atomar — Mon, 01 Apr 2013 11:50:00 GMT

Current Revision posted to Documents by atomar on 4/1/2013 11:50:00 AM

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Kit Overview

The Analog Devices ADP1853-EVALZADP1853-EVALZ is an evaluation board to evaluate ADP1853ADP1853. The input range for this evaluation board is 9 V to 15 V, and the regulated output voltage is 3.3 V with a maximum 20 A output current. A switching frequency (fSW) of 300 kHz is chosen to achieve a good balance between efficiency and the sizes of the power components.

The ADP1853ADP1853 is a wide range input, dc-to-dc, synchronous buck controller capable of running from commonly used 3.3 V to 12 V (up to 20 V) voltage inputs. The device nominally operates in current mode with valley current sensing providing the fastest step response for digital loads. It can also be configured as a voltage mode controller with low noise and crosstalk for sensitive loads.

The ADP1853ADP1853 is used as a master synchronization clock for the power system and for convenient synchronization between controllers. The CLKOUT signal can synchronize other devices in the ADP185x family such that slave devices are phase-shifted from the master to reduce the input ripple current, improve EMI, and reduce the size of the input bulk capacitance. The ADP1853 can also be configured as a slave device for current sharing.

Additionally, the ADP1853ADP1853 includes accurate tracking, precision enable, and power good functions for sequencing. The ADP1853 provides a high speed, high peak current gate driving capability to enable energy efficient power conversion. The device can be configured to operate in power saving mode by skipping pulses, reducing switching losses and improving efficiency at light load and standby conditions.

Key Applications: Intermediate bus and POL systems requiring sequencing and tracking, including: Telecom base station and networking, Industrial and Instrumentation, Medical and healthcare

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Technical Documents

Learning Center

Type	Description
User Guide	ADI: User Guide (UG-431) for ADP1853 Evaluation Board
Datasheet	ADI: Datasheet for ADP1853 Synchronous, Step-Down DC-to-DC Controller with Voltage Tracking and Synchronization (Rev 0)

Design Elements

Type	Description
Reference Design	ADI: Reference Design for ADP1851_53 Buck Designer Tool
CAD Model	ADI: CAD Model for ADP1853ACPZ-R7 (BXL File Format)

Video

Kit Features

Features of ADP1853-EVALZADP1853-EVALZ:

Input voltage range: 9 V to 15 V
Output voltage: 3.3 V
Output current: up to 20 A
Switching frequency: 300 kHz
Operates in PWM or PSM
Designed for evaluation of the ADP1853ADP1853 functionality
Flexible and easy to re-configure and modify

Features of ADP1853ADP1853:

Input voltage range: 2.75 V to 20 V
Output voltage range: 0.6 V to 90% VIN
Maximum output current of more than 25 A
Current mode architecture with current sense input
Configurable to voltage mode
±1% output voltage accuracy over temperature
Voltage tracking input
Programmable frequency: 200 kHz to 1.5 MHz
Synchronization input
Internal clock output
Power saving mode at light load
Precision enable input
Power good with internal pull-up resistor
Adjustable soft start
Programmable current sense gain
Integrated bootstrap diode
Starts into a precharged load
Externally adjustable slope compensation
Suitable for any output capacitor
Overvoltage and overcurrent-limit protection
Thermal overload protection
Input undervoltage lockout (UVLO)
Available in 20-lead, 4 mm × 4 mm LFCSP
Supported by ADIsimPower™ design tool

Kit Contents

Tha Analog Devices ADP1853-EVALZADP1853-EVALZ supplied with below contents:

ADP1853-EVALZADP1853-EVALZ ADP1853ADP1853 Evaluation Board

Tags: adp1853-evalz, evalutaion_board, adp1853, analog_devices