ADP2441-EVALZ datasheet, PDF - EEWORLD Datasheet

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ADP2441-EVALZ: DescriptionSwitching Voltage Regulators 36V 1A Sync Step-Down; CategoryDevelopment board/suite/development tools; File Size2MB，33 Pages; ManufacturerADI; Websitehttps://www.analog.com

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ADP2441-EVALZ Overview

Switching Voltage Regulators 36V 1A Sync Step-Down

ADP2441-EVALZ Parametric

Parameter Name	Attribute value
Product Category	Power Management IC Development Tools
Manufacturer	ADI
RoHS	Details
Product	Evaluation Boards
Type	Voltage Regulators - Switching Regulators
Tool Is For Evaluation Of	ADP2441
Input Voltage	4.5 V to 36 V
Output Voltage	5 V
Packaging	Bulk
Description/Function	1 A, synchronous, step-down DC to DC regulator
For Use With	ADP2441
Maximum Operating Temperature	+ 125 C
Minimum Operating Temperature	- 40 C
Output Current	1 A
Factory Pack Quantity	1
Unit Weight	7.054792 oz

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Data Sheet

FEATURES

Wide input voltage range of 4.5 V to 36 V

Low minimum on time of 50 ns

Maximum load current of 1 A

High efficiency of up to 94%

Adjustable output down to 0.6 V

±1% output voltage accuracy

Adjustable switching frequency of 300 kHz to 1 MHz

Pulse skip mode at light load for power saving

Precision enable input pin

Open-drain power good

External soft start with tracking

Overcurrent-limit protection

Shutdown current of less than 15 µA

UVLO and thermal shutdown

12-lead, 3 mm × 3 mm LFCSP package

Reference similar product

ADP2442

with synchronization

capability

36 V,1 A, Synchronous,

Step-Down DC-to-DC Regulator

ADP2441

TYPICAL CIRCUIT CONFIGURATION

OUT

BST

AGND

VCC

BST

TOP

BOTTOM

VIN

OUT

COMP

ADP2441

SS/TRK

FREQ

COMP

PGOOD

PGND

FREQ

Figure 1.

100

OUT

= 3.3V

OUT

= 12V

OUT

= 5V

Point of load applications

Distributed power systems

Industrial control supplies

Standard rail conversion to 24 V/12 V/5 V/3.3 V

EFFICIENCY (%)

APPLICATIONS

10581-002

GENERAL DESCRIPTION

The

ADP2441

is a constant frequency, current mode control,

synchronous, step-down dc-to-dc regulator that is capable of

driving loads up to 1 A with excellent line and load regulation

characteristics. The

ADP2441

operates with a wide input voltage

range of 4.5 V to 36 V, which makes it ideal for regulating power

from a wide variety of sources. In addition, the

ADP2441

has

very low minimum on time (50 ns) and is, therefore, suitable for

applications requiring a very high step-down ratio.

The output voltage can be adjusted from 0.6 V to 0.9 V × V

High efficiency is obtained with integrated low resistance N-

channel MOSFETs for both high-side and low-side devices.

The switching frequency is adjustable from 300 kHz to 1 MHz with

an external resistor. The

ADP2441

also has an accurate power-good

(PGOOD) open-drain output signal.

At light load conditions, the regulator operates in pulse skip

mode by skipping pulses and reducing switching losses to improve

energy efficiency. In addition, at medium to heavy load conditions,

the regulator operates in fixed frequency pulse-width modulation

(PWM) mode to reduce electromagnetic interference (EMI).

Rev. C

Document Feedback

= 24V

= 300kHz

0.02

0.2

LOAD (A)

Figure 2. Efficiency vs. Load Current, V

= 24 V

The

ADP2441

uses hiccup mode to protect the IC from short

circuits or from overcurrent conditions on the output. The external

programmable soft start limits inrush current during startup for

a wide variety of load capacitances. Other key features include

tracking, input undervoltage lockout (UVLO), thermal shutdown

(TSD), and precision enable (EN), which can also be used as a

logic level shutdown input.

The

ADP2441

is available in a 3 mm × 3 mm, 12-lead LFCSP

package and is rated for a junction temperature range of −40°C

to +125°C.

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.

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

Technical Support

www.analog.com

10581-001

ADP2441

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Typical Circuit Configuration......................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings ............................................................ 5

Thermal Resistance ...................................................................... 5

ESD Caution .................................................................................. 5

Pin Configuration and Function Descriptions ............................. 6

Typical Performance Characteristics ............................................. 7

Internal Block Diagram ................................................................. 14

Theory of Operation ...................................................................... 15

Control Architecure ................................................................... 15

Adjustable Frequency................................................................. 16

Power Good ................................................................................. 16

Soft Start ...................................................................................... 16

Tracking ....................................................................................... 16

Undervoltage Lockout (UVLO) ............................................... 17

Precision Enable/Shutdown ...................................................... 17

Current-Limit and Short-Circuit Protection .......................... 17

Thermal Shutdown ..................................................................... 17

Data Sheet

Applications Information .............................................................. 18

Selecting the Output Voltage .................................................... 18

Setting the Switching Frequency .............................................. 18

Soft Start ...................................................................................... 19

External Components Selection ............................................... 19

Boost Capacitor .......................................................................... 21

VCC Capacitor............................................................................ 21

Loop Compensation .................................................................. 21

Large Signal Analysis of the Loop Compensation ................. 21

Design Example .............................................................................. 23

Configuration and Components Selection ............................. 23

System Configuration ................................................................ 24

Typical Application Circuits ......................................................... 25

Design Example .......................................................................... 25

Other Typical Circuit Configurations ..................................... 26

Power Dissipation and Thermal Considerations ....................... 29

Power Dissipation....................................................................... 29

Thermal Considerations............................................................ 29

Evaluation Board Thermal Performance .................................... 30

Circuit Board Layout Recommendations ................................... 31

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

8/15—Rev. B to Rev. C

Changes to Figure 45 ...................................................................... 14

6/14—Rev. A to Rev. B

Change to Features Section ............................................................. 1

11/12—Rev. 0 to Rev. A

Changes to Figure 1 .......................................................................... 1

Changed I

VIN

Maximum Parameter from 2.2 mA to2 mA.......... 3

Changes to Pin 3 and Pin 5 Descriptions ...................................... 6

Changes to Boost Capacitor Section ............................................ 21

Changes to Figure 66 ...................................................................... 31

Changes to Ordering Guide .......................................................... 32

6/12—Revision 0: Initial Version

Rev. C | Page 2 of 32

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