ADP2102YCPZ-0.8-R7 datasheet, PDF

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ADP2102YCPZ-0.8-R7: DescriptionSwitching Regulator 600mA 3MHz Sync Step-Down; CategoryPower/power management The power supply circuit; File Size647KB，24 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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ADP2102YCPZ-0.8-R7 Overview

Switching Regulator 600mA 3MHz Sync Step-Down

ADP2102YCPZ-0.8-R7 Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	ADI
Parts packaging code	QFN
package instruction	3 X 3 MM, ROHS COMPLIANT, LFCSP-16
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Maximum input voltage	5.5 V
Minimum input voltage	2.7 V
Nominal input voltage	3.6 V
JESD-30 code	S-XQCC-N16
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	3
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	0.9 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	3000 kHz
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3 mm

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Low Duty Cycle, 600 mA, 3 MHz Synchronous

Step-Down DC-to-DC Converter

ADP2102

FEATURES

Input voltage range: 2.7 V to 5.5 V

600 mA maximum load current

95% efficiency

Low duty cycle operation

Only 3 tiny external ceramic components

3 MHz typical operating frequency

Fixed output voltage from 0.8 V to 1.875 V

Adjustable output voltage up to 3.3 V

0.01 μA shutdown supply current

Automatic power save mode

Internal synchronous rectifier

Internal soft start

Internal compensation

Enable/shutdown logic input

Undervoltage lockout

Current limit protection

Thermal shutdown

Small 8-lead, 3 mm × 3 mm LFCSP package

GENERAL DESCRIPTION

The ADP2102 is a synchronous step-down dc-to-dc converter

that converts a 2.7 V to 5.5 V unregulated input voltage to a lower

regulated output voltage with up to 95% efficiency and 1%

accuracy. The low duty cycle capability of the ADP2102 is ideal for

USB applications or 5 V systems that power up submicron subvolt

processor cores. Its 3 MHz typical operating frequency and excel-

lent transient response allow the use of small, low cost 1 μH

inductors and 2.2 μF ceramic capacitors. At medium-to-high

load currents, it uses a current mode, pseudofixed frequency pulse-

width modulation to extend battery life. To ensure the longest

battery life in portable applications, the ADP2102 has a power save

mode (PSM) that reduces the switching frequency under light

load conditions to significantly reduce quiescent current.

The ADP2102 is available in both fixed and adjustable output

voltage options with 600 mA maximum output current. The preset

output voltage options voltage are 1.875 V, 1.8 V, 1.5 V, 1.375 V,

1.25 V, 1.2 V, 1.0 V, and 0.8 V. The adjustable voltage option is

available from 0.8 V to 3.3 V. The ADP2102 requires only three

external components and consumes 0.01 μA in shutdown mode.

The ADP2102 is available in an 8-lead LFCSP package and is

specified for the −40 °C to +85 °C temperature range.

APPLICATIONS

USB powered devices

WLAN and gateways

Point of loads

Processor core power from 5 V

Digital cameras

PDAs and palmtop computers

Portable media players, GPS

TYPICAL PERFORMANCE CHARACTERISTICS

100

= 2.7V

= 3V

OUT

= 1.375V

= 25°C

TYPICAL APPLICATIONS CIRCUIT

INPUT VOLTAGE

2.7V TO 5.5V

2.2µF

1µH

OUTPUT VOLTAGE

0.8V TO 1.875V

OUT

2.2µF

EFFICIENCY (%)

= 3.6V

= 4.2V

FORCED

CCM

ADP2102

MODE

FB/OUT

GND

OFF

100

LOAD CURRENT (mA)

1000

Figure 1.

06631-052

Figure 2.

Rev. B

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.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

06631-001

DCM/

CCM

ADP2102

TABLE OF CONTENTS

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

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

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

Typical Performance Characteristics ............................................. 1

Typical Applications Circuit............................................................ 1

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

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

Absolute Maximum Ratings............................................................ 4

Thermal Resistance ...................................................................... 4

Boundary Condition.................................................................... 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

Theory of Operation ...................................................................... 13

Control Scheme .......................................................................... 13

Constant On-Time Timer ......................................................... 13

Forced Continuous Conduction Mode ................................... 13

Power Save Mode........................................................................ 13

Synchronous Rectification ........................................................ 14

Current Limit .............................................................................. 14

Soft Start ...................................................................................... 15

Enable........................................................................................... 15

Undervoltage Lockout ............................................................... 15

Thermal Shutdown .................................................................... 15

Applications Information .............................................................. 16

Inductor Selection ...................................................................... 16

Input Capacitor Selection.......................................................... 16

Output Capacitor Selection....................................................... 16

Typical Applications Circuits.................................................... 17

Setting the Output Voltage........................................................ 19

Efficiency Considerations ......................................................... 19

Thermal Considerations............................................................ 20

Design Example.......................................................................... 20

Circuit Board Layout Recommendations ................................... 22

Recommended Layout............................................................... 22

Outline Dimensions ....................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

9/07—Rev. A to Rev. B

Changes to Features, Applications, and General Description .... 1

Changes to Table 4............................................................................ 5

Changes to Table 6.......................................................................... 17

Changes to Table 7.......................................................................... 19

Changes to Circuit Board Layout Recommendations Section.... 21

Updated Outline Dimensions ....................................................... 23

Changes to Ordering Guide .......................................................... 23

6/07—Rev. 0 to Rev. A

Changes to Ordering Guide .......................................................... 23

6/07—Revision 0: Initial Version

Rev. B | Page 2 of 24

ADP2102

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

MODE 1

EN 2

FB/OUT 3

AGND 4

8 AVIN

ADP2102

TOP VIEW

(Not to Scale)

7 PVIN

06631-003

6 LX

5 PGND

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

No.

Mnemonic

MODE

FB/OUT

Description

Mode Input. To set the ADP2102 to forced continuous conduction mode (CCM), drive MODE high. To set the ADP2102

to power save mode/auto mode (PSM), drive MODE low.

Enable Input. Drive EN high to turn on the ADP2102. Drive EN low to turn it off and reduce the input current to 0.1 μA.

This pin cannot be left floating.

Output Sense Input or Feedback Input. For fixed output versions, OUT is the top of the internal resistive voltage

divider. Connect OUT to the output voltage. For adjustable (no suffix) versions, FB is the input to the error amplifier.

Drive FB through a resistive voltage divider to set the output voltage. The FB regulation threshold is 0.8 V.

Analog Ground. Connect AGND to PGND at a single point as close to the ADP2102 as possible. The exposed paddle is

electrically common with the analog ground pin.

Power Ground.

Switch Output. LX is the drain of the P-channel MOSFET switch and the N-channel synchronous rectifier. Connect the

output LC filter between LX and the output voltage.

Power Source Input. Drive PVIN with a 2.7 V to 5.5 V power source. A ceramic bypass capacitor of 2.2 μF or greater is

required on this pin to the nearest PGND plane.

Power Source Input. AVIN is the supply for the ADP2102 internal circuitry. This pin can be connected in three different ways.

For noise reduction, place an external RC filter between PVIN and AVIN. The recommended values for the

external RC filter are 10 Ω and 0.1 μF, respectively. This configuration can be used for all loads.

For light-to-medium loads up to 300 mA, the AVIN pin and the PVIN pin can be shorted together.

For light-to-heavy loads (greater than 300 mA), bypass the AVIN pin with a 1 pF to 0.01 μF capacitor to the

nearest PGND plane. Do not short the AVIN and PVIN pins when using only a bypass capacitor.

AGND

PGND

PVIN

AVIN

Rev. B | Page 5 of 24

ADP2102YCPZ-0.8-R7 Related Products

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