ADP5042: Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset

Product Status:Recommended for New Designs

ADP5042 Data Sheet Rev A, 11/2011 (pdf 1149kB)

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Product Details

Product Status:Recommended for New Designs

Check Price and Availability Add to Signal Chain Designer Explore in Signal Chain Designer

Model	Package	Price* (100-499)	Price* 1000 pcs
ADP5042ACPZ-1-R7 Status: Production	LFCSP:LEADFRM CHIP SCALE	-	$1.99
ADP5042ACPZ-2-R7 Status: Production	LFCSP:LEADFRM CHIP SCALE	-	$1.99

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 high switching frequency of the buck regulator enables use of tiny multilayer external components and minimizes the board space.

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 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.

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 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.

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FEATURES and BENEFITS

Input voltage range: 2.3 V to 5.5 V
One 0.8 A buck regulator
Two 300 mA LDOs
20-lead, 4 mm x~ 4 mm LFCSP package
Initial regulator accuracy: ±1%
Overcurrent and thermal protection
- Soft start
- Undervoltage lockout
- Open drain processor reset with threshold monitoring - ±1.5% 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 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
- 100% duty cycle low dropout mode
LDOs key specifications
- Low VIN from 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 VOUT = 2.8 V
- Low dropout voltage: 150 mV at 300 mA load
- -40°C to +125°C junction temperature range

Documentation

Title	Content Type	File Type
ADP5042: Micro PMU with 0.8 A Buck, Two 300 mA LDOs Supervisory, Watchdog and Manual Reset (Rev A, 11/2011) (pdf, 1149 kB)	Data Sheets	PDF
Integrated Power Solutions for Xilinx Spartan-3 FPGAs (pdf, 2253 kB) Combining multiple switching regulators and LDOs into a single package enables very small, flexible, highly efficient power management solutions for powering FPGAs.	Solutions Bulletins	PDF
Integrated Power Solutions for Altera Cyclone FPGAs (pdf, 1716 kB) Combining multiple switching regulators and LDOs into a single package enables very small, flexible, highly efficient power management solutions for powering FPGAs.	Solutions Bulletins	PDF
RAQs index	Rarely Asked Questions	HTML
Glossary of EE Terms	Glossary	HTML

Design Tools,Models,Drivers & Software

Title	Content Type	File Type
Supervisor Parametric Search Narrow down the thousands of available supervisors using parameters applicable to your application.	ADIsim Design/Simulation Tools	HTML
Download files for ADIsimPower™ Voltage Regulator Design Tool The individual Excel-based voltage regulator design tools used in ADIsimPower™.	ADIsim Design/Simulation Tools	HTML
ADIsimPower™ Voltage Regulator Design Tool This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.	ADIsim Design/Simulation Tools	HTML

Excel-based download tool [ZIP 4.8MB] for
Linear Regulator Parametric Search and Multi-Rail Design

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Model	Package	Pins	Temp. Range	Packing, Qty	Price*(100-499)	Price*1000 pcs	RoHS	View PCN/ PDN	Check Inventory/ Purchase/Sample
ADP5042ACPZ-1-R7 Status: Production	LFCSP:LEADFRM CHIP SCALE	20	Ind	Reel, 1500	-	$1.99	Y Material Info	PCN	Purchase Sample
ADP5042ACPZ-2-R7 Status: Production	LFCSP:LEADFRM CHIP SCALE	20	Ind	Reel, 1500	-	$1.99	Y Material Info	PCN	Purchase Sample

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.