Datasheet > ADP5043

ADP5043

更新时间： 2024-11-24 02:52:07

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
30页	1816K
描述
Micro PMU with 800 mA Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset

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ADP5043 数据手册

Micro PMU with 800 mA Buck, 300 mA LDO,

Supervisory, Watchdog, and Manual Reset

Data Sheet

ADP5043

FEATURES

GENERAL DESCRIPTION

Input voltage range: 2.3 V to 5.5 V

One 800 mA buck regulator

One 300 mA LDO

The ADP5043 combines one high performance buck regulator

and one low dropout (LDO) regulator in a small 20-lead LFCSP

to meet demanding performance and board space requirements.

20-lead, 4 mm × 4 mm LFCSP package

Initial regulator accuracy: 1ꢀ

Overcurrent and thermal protection

Soft start

The high switching frequency of the buck regulator enables use of

tiny multilayer external components and minimizes board space.

The MODE pin selects the buck’s mode of operation. When set

to logic high, the buck regulator operates in forced PWM mode.

When the MODE pin is set to logic low, the buck regulator

operates in PWM mode when the load is around the nominal

value. When the load current falls below a predefined threshold,

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

light-load efficiency.

Undervoltage lockout

Open-drain processor reset with threshold monitoring

1.5ꢀ threshold accuracy over the full temperate range

Guaranteed reset output valid to V_CC= 1 V

Dual watchdog for secure systems

Watchdog 1 controls reset

Watchdog 2 controls reset and regulators power cycle

Buck regulator key specifications

Current-mode topology for excellent transient response

3 MHz operating frequency

Uses tiny multilayer inductors and capacitors

Mode pin selects forced PWM or auto PFM/PSM modes

100ꢀ duty cycle low dropout mode

LDO key specifications

The low quiescent current, low dropout voltage, and wide input

voltage range of the ADP5043 LDO extend the battery life of

portable devices. The LDO maintains a power supply rejection

of greater than 60 dB for frequencies as high as 10 kHz while

operating with a low headroom voltage.

Each regulator is activated by a high level on the respective

enable pin. The ADP5043 is available with factory programmable

default output voltages and can be set to a wide range of options.

Low V_INfrom 1.7 V to 5.5 V

The ADP5043 contains supervisory circuits that monitor

power supply voltage levels and code execution integrity in

microprocessor-based systems. The ADP5043 also provides

power-on reset signals. An on-chip dual watchdog timer can

reset the microprocessor or power cycle the system (Watchdog 2)

if it fails to strobe within a preset timeout period.

Stable with1 μF ceramic output capacitors

High PSRR, 60 dB up to 1 kHz/10 kHz

Low output noise

Low dropout voltage: 150 mV at 300 mA load

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

HIGH LEVEL BLOCK DIAGRAM

ADP5043

AVIN

1µH

FILT

30Ω

AVIN

VIN1

OUT1

800mA

VOUT1

PGND

VIN1 = 2.3V

TO 5.5V

10µF

BUCK

EN_BK

4.7µF

FPWM

MODE

EN1

OFF

PSM/PWM

VOUT2

OUT2

300mA

VIN2

VIN2 = 1.7V

TO 5.5V

LDO

1µF

EN_LDO

EN2

OFF

AVIN

WSTAT

nRSTO

WDI1

WDI2

VIN

WMOD

WD1 MODE

SELECTION

GND

AGND

GND

Figure 1.

Rev. C

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.

Technical Support

www.analog.com

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与ADP5043相关器件

型号	品牌	获取价格	描述	数据表
ADP5043ACPZ-1-R7	ADI	获取价格	Micro PMU with 800 mA Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset
ADP5043CP-1-EVALZ	ADI	获取价格	Micro PMU with 800 mA Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset
ADP50460008CBZR	ADI	获取价格	POWER SUPPLY SUPPORT CKT
ADP5050	ADI	获取价格	5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator
ADP5050ACPZ-R7	ADI	获取价格	5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator
ADP5050-EVALZ	ADI	获取价格	5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator
ADP5051	ADI	获取价格	Integrated Power Solution with Quad Buck
ADP5051ACPZ-R7	ADI	获取价格	Integrated Power Solution with Quad Buck Regulators, Supervisory, and I<sup>2</su
ADP5052	ADI	获取价格	5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator
ADP5052ACPZ-R7	ADI	获取价格	5-Channel Integrated Power Solution with Quad Buck Regulators and 200 mA LDO Regulator

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