ADP1851-EVALZ Analog Devices, ADP1851-EVALZ Datasheet

ADP1851-EVALZ

Manufacturer Part Number

ADP1851-EVALZ

Description

EVALBOARD/Evaluation Board 1.8V 25A Output

Manufacturer

Analog Devices

Datasheet

1.ADP1851ACPZ-R7.pdf (24 pages)

Specifications of ADP1851-EVALZ

Pack_quantity

Comm_code

85437090

Lead_time

Eccn

EAR99

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Data Sheet

FEATURES

Input voltage range: 2.75 V to 20 V

Output voltage range: 0.6 V to 90% V

Maximum output current of more than 25 A

Current mode architecture

Configurable to voltage mode

±1% output voltage accuracy over temperature

Voltage tracking

Programmable frequency: 200 kHz to 1.5 MHz

Synchronization input

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 16-lead, 4 mm × 4 mm LFCSP

Supported by ADIsimPower design tool

APPLICATIONS

Intermediate bus and POL systems requiring sequencing and

GENERAL DESCRIPTION

The

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 config-

ured as a voltage mode controller with low noise and crosstalk

for sensitive loads.

The

output voltages. The

feature to eliminate beat frequencies between switching devices.

It also provides accurate tracking capability between supplies

and includes precision enable and power-good functions for

simple, robust sequencing.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

tracking, including

Telecom base station and networking

Industrial and instrumentation

Medical and healthcare

ADP1851

is a wide range input, dc-to-dc, synchronous

is ideal in system applications requiring multiple

ADP1851

includes a synchronization

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The

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.

The accurate current limit allows design within a narrower

range of tolerances and can reduce overall converter size and

cost. The

high accuracy reference with ±1% tolerance over the

temperature range of −40°C to +125°C.

With its wide range input voltage, the

designer with maximum flexibility for use in a variety of system

configurations; loop compensation, soft start, frequency setting,

power saving mode, current limit, and current sense gain can all

be programmed using external components. In addition, the

external RAMP resistor allows the selection of optimal slope

and V

excellent line rejection. The linear regulator and the bootstrap

diode for the high-side driver are internal.

Protection features include undervoltage lockout, overvoltage,

overcurrent/short circuit, and overtemperature.

ADP1851

LOW

Wide Range Input, Synchronous,

Step-Down DC-to-DC Controller

feedforward in both current and voltage modes for

ADP1851

HIGH

TYPICAL OPERATION CIRCUIT

provides a high speed, high peak current gate

VCCO

SYNC

FREQ

SS/TRK

RAMP

ADP1851

can regulate down to 0.6 V output using a

AGND (EP)

RAMP

PGOOD

COMP

PGND

VIN

BST

ILIM

Figure 1.

CSG

ADP1851

www.analog.com

provides the

OUT

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