ADP2147ACBZ-110-R7 Analog Devices Inc, ADP2147ACBZ-110-R7 Datasheet

ADP2147ACBZ-110-R7

Manufacturer Part Number

ADP2147ACBZ-110-R7

Description

IC REG BUCK 800MA 3MHZ 6WLSCP

Manufacturer

Analog Devices Inc

Series

-r

Type

Step-Down (Buck), PWM - Current Moder

Datasheet

1.ADP2147ACBZ-110-R7.pdf (16 pages)

Specifications of ADP2147ACBZ-110-R7

Internal Switch(s)

Yes

Synchronous Rectifier

Yes

Number Of Outputs

Voltage - Output

1.275V, 0.981V

Current - Output

800mA

Frequency - Switching

3MHz

Voltage - Input

2.3 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

6-UFBGA, WLCSP

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

ADP2147ACBZ-110-R7TR

Current page: 1 of 16
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FEATURES

Input voltage: 2.3 V to 5.5 V

Peak efficiency: 95%

3 MHz fixed frequency operation

Low quiescent current: 23 μA

Ultralow shutdown current: 0.2 μA (typical)

VSEL pin for simple dynamic voltage scaling (DVS)

100% duty cycle low dropout mode

Internal synchronous rectifier, compensation, and soft start

Current overload and thermal shutdown protection

Small, 6-ball, 1 mm × 1.5 mm WLCSP package

APPLICATIONS

PDAs and palmtop computers

Wireless handsets

Digital audio portable media players

Digital cameras, GPS navigation units

Low power portable medical equipment

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.

OUT

OFF

2.3V TO 5.5V

4.7µF

TYPICAL APPLICATIONS CIRCUIT

OUT

VIN

VSEL

ADP2147

GND

Figure 1.

VOUT

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

Tel: 781.329.4700

Fax: 781.461.3113

GENERAL DESCRIPTION

The ADP2147 is a high efficiency, low quiescent current, step-

down (buck) dc-to-dc regulator with an output voltage that can

be switched between two different settings under the control of

a select pin. The total solution requires only three tiny external

components.

The buck regulator automatically switches operating modes,

depending on the load current level, to maximize efficiency. At

high output loads, the buck regulator operates in PWM mode.

When the load current falls below a predefined threshold, the

regulator operates in power save mode (PSM), improving the

light-load efficiency.

The ADP2147 runs on input voltages of 2.3 V to 5.5 V, which

allows for single lithium or lithium polymer cells, multiple

alkaline or NiMH cells, PCMCIA, USB, and other standard

power sources. The maximum load current of 800 mA is

achievable across the input voltage range.

The ADP2147 is available with fixed output voltages from 0.8 V

to 3.3 V. All versions include an internal power switch and

synchronous rectifier for minimal external part count and high

efficiency. The ADP2147 has an internal soft start and is

internally compensated. During logic controlled shutdown, the

input is disconnected from the output, and the ADP2147 draws

less than 0.2 μA (typical) from the power source.

Other key features include undervoltage lockout to prevent deep

battery discharge and soft start to prevent input current over-

shoot at startup. The ADP2147 is available in a 6-ball WLCSP.

1.0µH

Simple DVS, Buck Regulator

OUT

4.7µF

Compact, 800 mA, 3 MHz,

ADP2147

www.analog.com

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ADP2147ACBZ-110-R7 Summary of contents

Page 1

FEATURES Input voltage: 2 5.5 V Peak efficiency: 95% 3 MHz fixed frequency operation Low quiescent current: 23 μA Ultralow shutdown current: 0.2 μA (typical) VSEL pin for simple dynamic voltage scaling (DVS) 100% duty cycle low dropout ...

Page 2

ADP2147 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Typical Applications Circuit............................................................ 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Input and Output Capacitor, Recommended Specifications ................................................................................ 3 Absolute Maximum Ratings............................................................ 4 Thermal Data ................................................................................ 4 Thermal ...

Page 3

SPECIFICATIONS −40°C to +125°C for minimum/maximum specifications, and T IN OUT J unless otherwise noted. All limits at temperature extremes are guaranteed via correlation using standard statistical ...

Page 4

ADP2147 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter VIN, EN, VSEL VOUT GND Temperature Range Operating Ambient Operating Junction Storage Temperature Lead Temperature Range Soldering (10 sec) Vapor Phase (60 sec) Infrared (15 sec) ESD Model Human Body Charged ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description A1 VIN Power Source Input. VIN is the source of the pFET high-side switch. Bypass VIN to GND with a 4.7 μF or greater capacitor as ...

Page 6

ADP2147 TYPICAL PERFORMANCE CHARACTERISTICS 25° unless otherwise noted 100 0.001 0.01 I (A) OUT Figure 3. ...

Page 7

I (A) OUT Figure 9. Frequency vs. Output Current, Across Temperature 1.8 V OUT 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 ...

Page 8

ADP2147 OUT OUT 2 CH1 100mV CH2 250mA Ω M 40.0µs A CH4 5.00V Figure 15. Response to Load Transient 200 mA 1.8 V OUT T SW ...

Page 9

OUT 1 3 CH1 20.0mV M 40.0µs A CH3 1.00V T –84.0000µs Figure 21. Response to Line Transient, V OUT OUT 1 3 CH1 ...

Page 10

ADP2147 OUT 1 1 CH1 10.0mVΩ CH2 500mA Ω M 40.0µs CH4 2.00V Figure 27. Typical Waveform 1.8 V, PWM Mode, I OUT 130 1.8V 5.5V, AUTO IN 120 ...

Page 11

THEORY OF OPERATION VOUT VSEL The ADP2147 is a step-down dc-to-dc regulator that uses a fixed frequency and high speed current-mode architecture. The high switching frequency and tiny 6-ball WLCSP package enable a small step-down dc-to-dc regulator solution. The ADP2147 ...

Page 12

ADP2147 SIMPLE DYNAMIC VOLTAGE SCALING (DVS) The ADP2147 has a VSEL pin that allows the user to force the output voltage to change from one level (the default VOUT setting) when VSEL is low and to another level (the alternate ...

Page 13

APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION Trade-offs between performance parameters such as efficiency and transient response can be made by varying the choice of external components in the applications circuit, as shown in Figure 1. Inductor The high switching frequency of ...

Page 14

ADP2147 Capacitors with lower equivalent series resistance (ESR) are preferred to guarantee low output voltage ripple, as shown in the following equation: V ≤ RIPPLE ESR COUT I RIPPLE The effective capacitance needed for stability, which includes temperature and dc ...

Page 15

EVALUATION BOARD TB1 VIN JP3 ENABLE JP2 VSEL TB5 GND IN EVALUATION BOARD LAYOUT Figure 36. Top Layer VIN GND CONN PWR 2-P VIN ADP2147 VIN VIN VIN ...

Page 16

... OUTLINE DIMENSIONS BALL A1 IDENTIFIER 0.640 0.595 0.550 SEATING PLANE ORDERING GUIDE Temperature 1 Model Range ADP2147ACBZ-110-R7 −40°C to +125°C ADP2147ACBZ-130-R7 −40°C to +125°C ADP2147ACBZ-150-R7 −40°C to +125°C ADP2147ACBZ-170-R7 −40°C to +125°C ADP2147CB-110EVALZ ADP2147CB-130EVALZ ADP2147CB-150EVALZ ADP2147CB-170EVALZ RoHS Compliant Part. ...

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