New Analog Devices Multi-Output Regulators with Supervisory and Watchdog Timers Reduce Component Count,
Increase Power Density and Reliability
January 23, 2012 Press Release
January 23, 2012
NORWOOD, Mass.--( BUSINESS WIRE)--
Analog Devices, Inc. (ADI) is continuing to help industrial, medical and communications equipment designers
improve power system performance by reducing board space with the introduction today of the
ADP5040 multi-output regulators. The regulators meet the increasing demand for greater power density by
combining a high-efficiency, 3-MHz, 1.2-A buck regulator and two 300-mA LDOs (low dropout regulators) in a small
20-lead LFCSP package. Unlike discrete power solutions that require up to 14 components and 126 mm2 of board
space, these highly integrated regulators provide a more integrated circuit solution using only nine components
and 50 mm2 of board space, to increase performance and reliability and lower system cost.
More About the ADP5041 and ADP5040 Multi-output Regulators
The ADP5041 and ADP5040 are
ideal power management companions to mid-range FPGAs, microprocessor and DSP systems where core, IO and memory
voltages are necessary. The ADP5041 regulator’s on-chip watchdog timer provides greater reliability by monitoring
code execution integrity in processor-based systems and resetting the processor if it fails to strobe within a
preset timeout period. The ADP5041 also features a high accuracy (±1.5% over temperature) reset generator that can
be externally programmed to monitor low voltage power supply rails. A wide range of ordering options also is
available to address multiple reset and watchdog timings.
The ADP5041 has a special circuit that detects a
three-state condition when applied to the watchdog refresh input at the WDI pin typically controlled by a
processor/DSP output port. When the processor sets this port in three-state mode, the watchdog refresh timer is
disabled, preventing a watchdog reset to the processor. This feature is important when supporting processor/DSP
sleep operation where the core is disabled and watchdog timer cannot be refreshed.
The ADP5040 and ADP5041
multi-output regulators reduce thermal dissipation by using high-efficiency switching regulators with up 96
percent buck power efficiency. For low-noise analog circuit applications, the LDOs maintain a power supply
rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage. The
ADP5041 and ADP5040 also provide a three-rail system power supply (1.2-A buck regulator and two 300-mA LDOs) with
adjustable output voltages, which allows output voltages to be easily set using an external resistor divider
network. The 3-MHz buck regulator switching frequency allows small ceramic inductors to be used to further reduce
solution size and cost. These features allow the ADP5041 and ADP5040 to be easily and quickly modified for a
variety of applications with short product design schedules such as portable medical and industrial devices.
ADP5041 andADP5040 Multi-output Regulator Key Features:
Pricing and Availability
- One 1.2-A buck regulator
- Output voltage range = 0.8 V to 3.8 V
- Current mode topology for excellent transient response
- 3-MHz operating frequency
- Peak efficiency up to 96 percent
- Regulator total accuracy: ±3 percent
- Two 300-mA LDOs
- Output voltage range = 0.8 V to 4.75 V
- Low input supply voltage from 1.7 V to 5.5 V
- Stable with 2.2-μF ceramic output capacitors
- High PSRR = 60-dB up to 10 kHz
- Low output noise = 60 μV rms typical output noise at 1.2 V
- Low dropout voltage = 150-mV at 300-mA load
The ADF4151 PLL synthesizer is well-suited to work with ADI’s
ADL5802 RF mixers and is complementary to the
ADF4351 PLL synthesizers. The ADF4196 works well with the
ADL5375 modulator and is complementary to the
ADF4193 PLL synthesizer.
ADI’s RF IC Portfolio Covers Entire RF Signal Chain
Using a unique combination of design skills, system understanding and process technologies, Analog
Devices offers the broadest portfolio of RF ICs covering the entire RF signal chain from industry-leading
high-performance RF function blocks to highly integrated short-range and 3G/4G single-chip transceiver solutions.
The RF function blocks include PLL, integrated PLL/VCO and DDS synthesizers; TruPwr™ RMS power detectors and
logarithmic amplifiers; variable gain amplifiers; power amplifiers, low noise amplifiers and other amplifiers; RF
mixers and direct conversion modulator and demodulator products. These products are supported by a wide range of
design resources to ease the development of RF systems, including free design tools, Circuits from the Lab™
reference circuits and the EngineerZone™ technical forums. For more information, visit
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on
which Analog Devices has built one of the longest standing, highest growth companies within the technology sector.
Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog
Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is
headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog
Devices' common stock is listed on the New York Stock Exchange under the ticker “ADI” and is included in the S&P
ADI’s News Feed.
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Date Posted 1/23/2012
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