ADP2504CPZ-REDYKIT Analog Devices Inc, ADP2504CPZ-REDYKIT Datasheet

ADP2504CPZ-REDYKIT

Manufacturer Part Number

ADP2504CPZ-REDYKIT

Description

RedyKit 2.8, 5.0 On Bds All Volt In Kit

Manufacturer

Analog Devices Inc

Series

Redykit™r

Datasheets

1.ADP2503ACPZ-R7.pdf (16 pages)

2.ADP2504CPZ-REDYKIT.pdf (4 pages)

Specifications of ADP2504CPZ-REDYKIT

Main Purpose

DC/DC, Step Up or Down

Current - Output

Voltage - Input

2.5 ~ 5.5 V

Regulator Topology

Buck-Boost

Frequency - Switching

2.5MHz

Board Type

Fully Populated

Utilized Ic / Part

ADP2504

Kit Application Type

Power Management

Kit Contents

ADP2504-3.3-EVALZ & ADP2504-5-EVALZ Evaluation Board, 18 ADP2504 Samples In Labelled Bag

Silicon Manufacturer

Analog Devices

Silicon Core Number

ADP2504

Application Sub Type

Buck/Boost DC-DC Converter

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Power - Output

Outputs And Type

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

1 mm height profile

Compact PCB footprint

Seamless transition between modes

38 μA typical quiescent current

2.5 MHz operation enables 1.5 μH inductor

Input voltage: 2.3 V to 5.5 V

Fixed output voltage: 2.8 V to 5.0 V

Adjustable model output voltage range: 2.8 V to 5.5 V

600 mA (ADP2503) and 1000 mA (ADP2504) output options

Boost converter configuration with load disconnect

SYNC pin with three different modes

Internal compensation

Soft start

Enable/shutdown logic input

Overtemperature protection

Short-circuit protection

Undervoltage lockout protection

Small 10-lead 3 mm × 3 mm LFCSP (QFN) package

APPLICATIONS

Wireless handsets

Digital cameras/portable audio players

Miniature hard disk power supplies

USB powered devices

Rev. A

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.

Power save mode (PSM) for improved light load efficiency

Forced fixed frequency operation mode

Synchronization with external clock

2.3V TO 5.5V

ALLOWS THE ADP2503/ADP2504 TO OPERATE IN

THREE DIFFERENT MODES.

10µF

TYPICAL APPLICATION CIRCUIT

600 mA/1000 mA, 2.5 MHz Buck-Boost

OFF

ADP2503/ADP2504

SYNC

SW1

PVIN

VIN

Figure 1.

AGND

1.5µH

PGND

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

Tel: 781.329.4700

Fax: 781.461.3113

VOUT

GENERAL DESCRIPTION

The ADP2503/ADP2504 are high efficiency, low quiescent current

step-up/step-down dc-to-dc converters that can operate at input

voltages greater than, less than, or equal to the regulated output

voltage. The power switches and synchronous rectifiers are

internal to minimize external part count. At high load currents,

the ADP2503/ADP2504 use a current-mode, fixed frequency

pulse-width modulation (PWM) control scheme for optimal

stability and transient response. To ensure the longest battery life

in portable applications, the ADP2503/ADP2504 have an optional

power save mode that reduces the switching frequency under

light load conditions. For wireless and other low noise applica-

tions where variable frequency power save mode may cause

interference, the logic control input sync forces fixed frequency

PWM operation under all load conditions.

The ADP2503/ADP2504 can run from input voltages between

2.3 V and 5.5 V, allowing single lithium or lithium polymer cell,

multiple alkaline or NiMH cells, PCMCIA, USB, and other stan-

dard power sources. The ADP2503/ADP2504 have fixed output

options, or using the adjustable model, the output voltage can

be programmed through an external resistor divider. Compensa-

tion is internal to minimize the number of external components.

During logic-controlled shutdown, the input is disconnected

from the output and draws less than 1 μA from the input source.

Operating as boost converters, the ADP2503/ADP2504 feature

a true load disconnect function that isolates the load from the

power source. Other key features include undervoltage lockout

to prevent deep battery discharge, and soft start to prevent input

current overshoot at startup.

SW2

22µF

2.8V TO 5V

OUT

DC-to-DC Converters

ADP2503/ADP2504

www.analog.com

Related parts for ADP2504CPZ-REDYKIT

ADP2504CPZ-REDYKIT Summary of contents

Page 1

FEATURES 1 mm height profile Compact PCB footprint Seamless transition between modes 38 μA typical quiescent current 2.5 MHz operation enables 1.5 μH inductor Input voltage: 2 5.5 V Fixed output voltage: 2 5.0 V Adjustable ...

Page 2

ADP2503/ADP2504 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Typical Application Circuit ............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 Thermal Data ................................................................................ 4 Thermal Resistance ...................................................................... 4 ESD ...

Page 3

SPECIFICATIONS −40°C to +125°C for minimum/maximum specifications and T IN OUT unless otherwise noted. Table 1. Parameters INPUT CHARACTERISTICS Input Voltage Range Undervoltage Lockout ...

Page 4

ADP2503/ADP2504 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter PVIN, VIN, SW1, SW2, VOUT, SYNC, EN, FB PGND to AGND Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Soldering Conditions ESD Human Body Model ESD Charged Device Model ESD ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 VOUT Output of the ADP2503/ADP2504. Connect the output capacitor between VOUT and PGND. 2 SW2 Power Switch 2 Connection. This is the internal connection to ...

Page 6

ADP2503/ADP2504 TYPICAL PERFORMANCE CHARACTERISTICS 700 600 500 400 300 200 100 0 2.3 2.8 3.3 3.8 INPUT VOLTAGE (V) Figure 3. ADP2503 Output Current vs. Input Voltage 1100 1000 900 800 700 600 500 400 300 200 100 0 2.3 ...

Page 7

0.001 0.01 0.1 I (A) OUT Figure 9. Efficiency vs. Output Current, PWM Mode (V 100 ...

Page 8

ADP2503/ADP2504 SW1 4 SW2 OUT CH1 50.0mV CH2 1.00V M40.0µ CH3 5.00V CH4 5.00V T 18.20 Figure 15. Line Transient, PWM Mode (V = ...

Page 9

SW1 4 I OUT 3. 3.3V OUT V OUT 1 B CH1 100mV CH2 500mA Ω M100µ 45.40% B CH4 2.00V W Figure 21. Mode Change by Load Transients, Load Fall (V ...

Page 10

ADP2503/ADP2504 SW1 4 V OUT CH1 2.00V CH2 500mAΩ M 100µ 9.400 CH3 5.00V CH4 5.00V W W Figure 27. Startup into PWM Mode (V OUT V ...

Page 11

THEORY OF OPERATION VIN 8 VBAT = 2.3V PVIN TO 5.5V 5 10µF 2.25V BAND GAP REFERENCE SYNC 7 PGND The ADP2503/ADP2504 are synchronous average current- mode switching buck-boost regulators designed to maintain a fixed output voltage ...

Page 12

ADP2503/ADP2504 UNDERVOLTAGE LOCKOUT The undervoltage lockout circuit prevents the device from oper- ating incorrectly at low input voltages. It prevents the converter from turning on the power switches under undefined conditions and, therefore, prevents deep discharge of the battery supply. ...

Page 13

APPLICATIONS INFORMATION INDUCTOR SELECTION The high 2.5 MHz switching frequency of the ADP2503/ ADP2504 allows for minimal output voltage ripple, while minimizing inductor size and cost. Careful inductor selection also optimizes efficiency and reduces electromagnetic interfe- rence (EMI). The selection ...

Page 14

ADP2503/ADP2504 Input Capacitor Selection The ADP2503/ADP2504 require an input capacitor to filter noise on the VIN pin, and provide the transient currents while maintaining constant input and output voltage μF X5R/ X7R ceramic capacitor rated for 6.3 V ...

Page 15

PCB LAYOUT GUIDELINES Poor layout can affect ADP2503/ADP2504 performance, caus- ing electromagnetic interference (EMI) and electromagnetic compatibility (EMC) performance, ground bounce, and voltage losses. Poor layout can also affect regulation and stability. A good layout is implemented using the following ...

Page 16

... ADP2504ACPZ-R7 Adj ADP2503CPZ-REDYKIT 2 ADP2504CPZ-REDYKIT RoHS Compliant Part. 2 Redykit contains two evaluation boards with the stated output voltages plus three devices of each available fixed output voltage. ©2008–2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...

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