Datasheet > ADP5042

ADP5042

更新时间： 2024-11-26 08:19:39

品牌	Logo	应用领域
亚德诺 - ADI		监控
页数	文件大小	规格书
32页	1135K
描述
Micro PMU with 0.8 A Buck, Two 300 mA LDOs Supervisory, Watchdog and Manual Reset

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ADP5042 数据手册

Micro PMU with 0.8 A Buck, Two 300 mA LDOs

Supervisory, Watchdog and Manual Reset

ADP5042

HIGH LEVEL BLOCK DIAGRAM

FEATURES

Input voltage range: 2.3 V to 5.5 V

One 0.8 A buck regulator

Two 300 mA LDOs

20-lead, 4 mm × 4 mm LFCSP package

Initial regulator accuracy: 1ꢀ

Overcurrent and thermal protection

Soft start

= 30Ω

FILT

AVIN

1µH

AVIN

VIN1

OUT1

800mA

VOUT1

PGND

VIN1 = 2.3V

TO 5.5V

BUCK

EN_BK

10µF

4.7µF

FPWM

MODE

EN1

OFF

PSM/PWM

VOUT2

OUT2

300mA

LDO1

(DIGITAL)

VIN2

VIN2 = 1.7V

TO 5.5V

1µF

EN_LDO1

WSTAT

nRSTO

EN2

AVIN

Undervoltage lockout

WDI1

WDI2

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

EN3

OFF

EN_LDO2

VOUT3

VIN3

VIN3 = 1.7V

TO 5.5V

OUT3

300mA

LDO2

(ANALOG)

1µF

AGND

Watchdog 2 controls reset and regulators power cycle

Buck key specifications

Figure 1.

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

LDOs key specifications

Low V_INfrom 1.7 V to 5.5 V

Stable with1 μF ceramic output capacitors

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

Low output noise

110 μV rms typical output noise at V_OUT= 2.8 V

Low dropout voltage: 150 mV at 300 mA load

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

GENERAL DESCRIPTION

The ADP5042 combines one high performance buck regulator

and two low dropout regulators (LDO) in a small 20-lead

LFCSP to meet demanding performance and board space

requirements.

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

voltage range of the ADP5042 LDOs extend the battery life of

portable devices. The two LDOs maintain power supply

rejection greater than 60 dB for frequencies as high as 10 kHz

while operating with a low headroom voltage.

The high switching frequency of the buck regulator enables

use of tiny multilayer external components and minimizes the

board space.

Each regulator is activated by a high level on the respective

enable pin. The ADP5042 is available with factory programmable

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

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

to logic high, the buck regulators operate in forced PWM mode.

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

operate 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.

The ADP5042 contains supervisory circuits that monitor

power supply voltage levels and code execution integrity in

microprocessor-based systems. They also provide 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.

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 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

Fax: 781.461.3113

www.analog.com

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与ADP5042相关器件

型号	品牌	获取价格	描述	数据表
ADP5042ACPZ-1-R7	ADI	获取价格	Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset
ADP5042ACPZ-2-R7	ADI	获取价格	Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset
ADP5043	ADI	获取价格	Micro PMU with 800 mA Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset
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

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