ADP3089ACP-REEL7 [ADI]

IC 2 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, DSO8, 3 X 3 MM, LEAD FRAME, CSP-8, Switching Regulator or Controller;


型号：	ADP3089ACP-REEL7
厂家：	ADI
描述：	IC 2 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, DSO8, 3 X 3 MM, LEAD FRAME, CSP-8, Switching Regulator or Controller 开关
文件：	总4页 (文件大小：109K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PRELIMINARY TECHNICAL DATA

1 MHz, 1 A Buck Regulator

Preliminary Technical Data

ADP3089

FUNCTIONAL BLOCK DIAGRAM

FEATURES

1 MHz PWM Frequency

Ultrasmall 8-lead 3×3 Sq. mm Chip Scale Package

Automatic PWM to Power Saving Mode at Light Load

Fully Integrated 1.5 A Power Switch

3% Output Regulation Accuracy over Temperature,

Line, and Load

CURRENT

SENSE

AMP

DRV

PWM

COMPARATOR

1MHz

100% Duty Cycle Operation

SimpleCompensation

Output Voltage: 1.25 V to 10 V

Small Inductor and MLC Capacitors

Low Quiescent Current while Pulse Skipping

ThermalShutdown

Fully Integrated Soft Start

Cycle-by-cycle Current Limit

PROTECTION

LOGIC

(ILIM, OT)

RUN/STOP

COMPARATORS

ERROR

AMP

COMP

GND

SOFT-START

TIMER

REF

1.245V

GND

APPLICATONS

PDAs and Palmtop Computers

Notebook Computers

PCMCIA Cards

Bus Products

Portable Instruments

Industrial Systems

10µH

ADP3089

OUT

1.8V@1A

20BQ030

10µF

0.1µF

DRV

GND

GENERAL DESCRIPTION

18.2kΩ

GND

COMP

The ADP3089 is a high frequency, non-synchronous PWM

step-down DC-DC regulator with an integrated 1.5 A

power switch in a space-saving chip scale package. It pro-

vides high efficiency, excellent dynamic response, and is

very simple to use.

22µF

41.2kΩ

47pF

470pF

10.7kΩ

The ADP3089’s 1 MHz switching frequency allows for

small, inexpensive external components, and the current

mode control loop is simple to compensate and eases noise

filtering. It operates in PWM current mode under heavy

loads and saves energy at lighter loads by switching auto-

matically into Power Saving mode. Soft start is integrated

completely on chip, as is the cycle-by-cycle current limit.

Figure 1. Typical Application

Capable of operating from 2.5 V to 11 V input with a

typical output current of 1 A, it is ideal for portable, bat-

tery powered, industrial, PC and instrumentation applica-

tions. Supporting output voltages down to 1.25 V, the

ADP3089 is ideal to generate low voltage rails, providing

the optimal solution in its class for delivering power effi-

ciently, responsively, and simply with minimal printed

circuit board area.

The device is specified over the industrial temperature

range of -40°C to +85°C, and is offered in an ultrasmall 8-

lead 3×3 square mm chip scale package.

REV. PrE

8/26/02

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

Analog Devices, Inc., 2002

PRELIMINARY TECHNICAL DATA

ADP3089–SPECIFICATIONS¹

(V_IN= +3.3 V, T_A= -40°C to +85°C, unless otherwise noted)

Parameter

Symbol

Conditions

Min

Typ

Max

Units

SUPPLY

Input Voltage Range

Quiescent Current

Operating

V_IN

I_Q

DRV to GND

2.5

V_IN= 10 V, I_L= 1 A,

DRV = GND

No load

180

280

µA

Shutdown

Ground Current

I_SD

I_GND

V_COMP= 0 V

Normal Operation

V_IN= 10 V, I_L= 1 A,

DRV = 2 V

3.6

°C

Thermal Shutdown Threshold T_SD

OSCILLATOR

160

Oscillator Frequency

Minimum Sleep Duty Cycle

Maximum Duty Cycle

Wake up Hysteresis

f_SW

0.75

1.25

MHz

D_PSM

D_MAX

V_HYST

100

FB voltage drops below V_REF

OUTPUT SWITCH

Switch On Voltage

V_IO

I_L= 1A, FB and DRV tied to

GND

1.0

Current Limit Threshold

Leakage Current

I_LIM

1.5

1.7

0.5

µA

V_IN= 12 V

ERROR AMPLIFIER

Reference Voltage Accuracy

Reference Voltage Line

Regulation

V_REF

FB tied to COMP

FB tied to COMP,

1.222 1.245 1.265

.02

%/V

_IN= 3 V to 12 V

Feedback Input Bias Current

Maximum Output Current

Short Circuit Current

I_FB

I_COMP

soft start expired

-50

µA

I_COMP

g_m, _EA

g_m,

V_COMP= 0 V, activating

shutdown

V_FBto I_COMP

Transconductance

480

µA/V

MODULATOR

Transconductance

Control Offset Voltage

V_COMPto I_L

0.90

A/V

MOD

V_PWM

Soft Start Time

Shutdown Threshold Voltage

Slope Compensation

t_SS

V_COMP

m_SC

250

600

750

µs

A/µs

340

Effectively summed to I_SW

0.5

N O T E S

AlllimitsattemperatureextremesareguaranteedviacorrelationusingstandardStatisticalQualityControl(SQC).

For higher efficiency operation, tie the DRV pin to the output for I_L< 250 mA, and V_IN> 3 V.

V(IN)-V(SW),includesvoltagedropacrossinternalcurrentsensor.

Specificationssubjecttochangewithoutnotice.

–2–

REV. PrE

PRELIMINARY TECHNICAL DATA

ADP3089

PIN FUNCTION DESCRIPTIONS

ABSOLUTE MAXIMUM RATINGS*

Input Supply Voltage .............................. –0.3 V to +12 V

Voltage on any pin with respect to GND

Mnemonic Function

............................................................ –0.3 V to +12 V

(voltage on any pin may not exceed V_IN)

1, 2

Power Supply Input. Both pins

must be connected.

Operating Ambient Temperature Range .. –40°C to +85°C

Operating Junction Temperature ......................... +125°C

θ_JA(4-layer board)............................................... 47°C/W

Storage Temperature Range .................. –65°C to +150°C

Lead Temperature Range (Soldering, 10 sec) ..... +240°C

Vapor Phase (60 sec) ........................................ +240°C

Infrared (20 sec) ............................................... +240°C

3, 6

GND

COMP

Ground. Both pins must be con-

nected.

Feedback Loop Compensation

and Shutdown Input. An open

drain or collector used to pull

the pin to ground will shutdown

the device.

Feedback Voltage Sense Input.

This pin senses the voltage via

an external resistor divider.

This pin provides a separate

path for drive current to be con-

nected to ground.

*This is a stress rating only; operation beyond these limits can cause the device

to be permanently damaged. Unless otherwise specified, all voltages are

referenced to GND.

DRV

Switching Output.

PIN CONFIGURATION

ORDERING GUIDE

Temperature Package Branding

Model

Range

Option

Information

ADP3089ACP -40°C to +85°C CSP-8 3×3 P7A

DRV

GND

TOP

VIEW*

GND

COMP

* PIN’S UNDERSIDE

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the device features proprietary ESD protection circuitry, permanent damage may oc-

cur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

REV. PrE

–3–

PRELIMINARY TECHNICAL DATA

ADP3089

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

8 Lds Lead Frame Chip Scale Package (LFCSP)

3 × 3 mm Body

(CP-08)

0.50 (0.0197)

0.60 (0.0236)

0.24 (0.0094)

3.00 (0.1181)

BSC SQ

4 ꢁ

0.30 (0.0118)

PIN 1 INDICATOR

0.45 (0.0177)

PIN 1

INDICATOR

2.25 (0.0886)

2.05 (0.0807)

2.75 (0.1083)

BSC SQ

TOP

VIEW

1.50 (0.059)

REF

0.50 (0.0197)

BSC

BOTTOM

VIEW

0.25 (0.0098)

MIN

1.25 (0.0492)

0.95 (0.0374)

0.90 (0.0354) MAX

0.85 (0.0335) NOM

DETAIL A

12ꢀ MAX

0.70 (0.0276) MAX

0.65 (0.0256) NOM

COPLANARITY

0.05 (0.0020) MAX

0.01 (0.0004) NOM

0.30 (0.0118)

0.18 (0.0071)

SEATING

PLANE

SEATING PLANE

0.20 (0.0079) REF

DETAIL A

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS

(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR

REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN

–4–

REV. PrE

ADP3089ACP-REEL7 [ADI]

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