Datasheet > ADP5300

ADP5300

更新时间： 2024-11-07 01:07:39

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亚德诺 - ADI		/
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描述
50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator

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ADP5300 数据手册

50 mA/500 mA, High Efficiency, Ultralow

Power Step-Down Regulator

ADP5300

Data Sheet

FEATURES

TYPICAL APPLICATION CIRCUIT

2.2µH

Input supply voltage range: 2.15 V to 6.50 V

Operates down to 2.00 V voltage

= 2.15 TO 6.50V

OUT

PVIN

10µF

ADP5300

Ultralow 180 nA quiescent current

Selectable output voltage of 0.8 V to 5.0 V

1.5ꢀ output accuracy over full temperature range in

PWM mode

10µF

OFF

PGND

PWM

HYS

SYNC/MODE

STOP

VID0: 1.2V VID8: 2.5V

VID1: 1.5V VID9: 2.6V

VID2: 1.8V VID10: 2.7V

VID3: 2.0V VID11: 2.8V

VID4: 2.1V VID12: 2.9V

VID5: 2.2V VID13: 3.0V

VID6: 2.3V VID14: 3.3V

VID7: 2.4V VID15: 3.6V

Selectable hysteresis mode or PWM operation mode

Output current

Up to 50 mA in hysteresis mode

VOUTOK

STOP

AGND

VID

EPAD

Up to 500 mA in PWM mode

VOUTOK flag monitors the output voltage

Ultrafast stop switching control

Figure 1.

100ꢀ duty cycle operation mode

2.0 MHz typical switching frequency in PWM mode with

optional SYNC clock range from 1.2 MHz to 2.5 MHz

Quick output discharge (QOD) option

UVLO, OCP, and TSD protection

10-lead, 3 mm × 3 mm LFCSP

−40°C to +125°C operating temperature range

APPLICATIONS

Energy (gas and water) metering

Portable and battery-powered equipment

Medical applications

Keep-alive power supplies

GENERAL DESCRIPTION

The ADP5300 is a high efficiency, ultralow quiescent current

step-down regulator that draws only 180 nA quiescent current

to regulate the output.

The ADP5300 contains a VOUTOK flag, which monitors the

output voltage and runs at a 2 MHz switching frequency in

PWM mode. SYNC/MODE can be synchronized to an external

clock from 1.2 MHz to 2.5 MHz.

The ADP5300 runs from an input supply voltage range of 2.15 V

to 6.50 V, allowing the use of multiple alkaline or NiMH, Li-Ion

cells, or other power sources. The output voltage is selectable from

0.8 V to 5.0 V by an external VID resistor and factory fuse. The

total solution requires only four tiny external components.

The ADP5300 includes an STOP pin that can disable the regulator

switching temporarily, in this way a quiet system environment

can be achieved to benefit noise sensitive circuitry, such as data

conversion, RF data transmisson, and analog sensing.

The ADP5300 can operate between hysteresis mode and pulse-

width modulation (PWM) mode via the SYNC/MODE pin. The

regulator in hysteresis mode achieves excellent efficiency at a

power of less than 1 mW and provides up to 50 mA of output

current. The regulator in PWM mode produces a lower output

ripple and supplies up to 500 mA of output current. The flexible

configuration capability during operation of the device enables

very efficient power management to meet both the longest battery

life and low system noise requirements.

Other key features in the ADP5300 include separate enabling,

QOD, and safety features such as overcurrent protection (OCP),

thermal shutdown (TSD), and input undervoltage lockout (UVLO).

The ADP5300 is available in a 10-lead, 3 mm × 3 mm LFCSP

rated for a −40°C to +125°C operating temperature range.

Multifunction pin names may be referenced by their relevant

function only.

Rev. 0

Document Feedback

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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Technical Support

www.analog.com

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