ADP5034-2-EVALZ AD [Analog Devices], ADP5034-2-EVALZ Datasheet

ADP5034-2-EVALZ

Manufacturer Part Number

ADP5034-2-EVALZ

Description

Dual 3 MHz, 1200 mA Buck Regulators with Two 300 mA LDOs

Manufacturer

AD [Analog Devices]

Datasheet

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Data Sheet

FEATURES

Main input voltage range: 2.3 V to 5.5 V

Two 1200 mA buck regulators and two 300 mA LDOs

24-lead, 4 mm × 4 mm LFCSP package

Regulator accuracy: ±3%

Factory programmable or external adjustable VOUTx

3 MHz buck operation with forced PWM and auto PWM/PSM

BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V

LDO1/LDO2: output voltage range from 0.8 V to 5.2 V

LDO1/LDO2: low input supply voltage from 1.7 V to 5.5 V

LDO1/LDO2: high PSRR and low output noise

APPLICATIONS

Power for processors, ASICS, FPGAs, and RF chipsets

Portable instrumentation and medical devices

Space constrained devices

GENERAL DESCRIPTION

The ADP5034 combines two high performance buck regulators

and two low dropout (LDO) regulators in a small, 24-lead 4 mm ×

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.

modes

1.7V TO

2.3V TO

5.5V

OFF

4.7µF

0.1µF

4.7µF

AVIN

1µF

TYPICAL APPLICATION CIRCUIT

VIN4

AVIN

VIN1

VIN2

VIN3

EN4

EN1

EN2

EN3

ADP5034

EN1

EN2

EN3

EN4

HOUSEKEEPING

(ANALOG)

(DIGITAL)

BUCK1

BUCK2

MODE

LDO2

LDO1

Figure 1.

Regulators with Two 300 mA LDOs

AGND

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

Tel: 781.329.4700

Fax: 781.461.3113

4 mm LFCSP to meet demanding performance and board space

requirements.

The high switching frequency of the buck regulators enables tiny

multilayer external components and minimizes the board space.

When the MODE pin is set to high, the buck regulators operate in

forced PWM mode. When the MODE pin is set to low, the buck

regulators operate in PWM mode when the load is above a pre-

defined threshold. When the load current falls below a predefined

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

improving the light load efficiency.

The two bucks operate out of phase to reduce the input capaci-

tor requirement. The low quiescent current, low dropout voltage,

and wide input voltage range of the ADP5034 LDOs extend the

battery life of portable devices. The ADP5034 LDOs maintain

power supply rejection greater than 60 dB for frequencies as

high as 10 kHz while operating with a low headroom voltage.

Regulators in the ADP5034 are activated through dedicated

enable pins. The default output voltages can be externally set in

the adjustable version, or factory programmable to a wide range

of preset values in the fixed voltage version.

VOUT1

SW1

FB1

PGND1

MODE

VOUT2

SW2

FB2

PGND2

VOUT3

FB3

VOUT4

FB4

Dual 3 MHz, 1200 mA Buck

L1 1µH

L2 1µH

PWM

PSM/PWM

10µF

1µF

1200mA

300mA

OUT1

OUT2

OUT3

OUT4

ADP5034

www.analog.com

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