Analog Devices' ADP16x series of low-dropout regulators draw only 42 µA of quiescent current at full load with superior power-supply-rejection performance.

Norwood, MA (02/02/2011) - (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced four low-dropout regulators (LDOs) that address the size, power dissipation and power-supply-rejection requirements of wireless mobile devices. The ADP160, ADP161, ADP162 and ADP163 ultra-low-quiescent-current LDOs extend the battery life of portable devices by drawing only 560 nA (typical) at no load and 42 µA of quiescent current (typical) at full load. These LDOs provide superior 70 dB PSRR (power-supply-rejection ratio) at 60 Hz, which is more than twice that of competing LDOs at full load current. The new ADP16x series LDOs are designed for applications such as power meter reader/data terminals, portable industrial, medical measurement devices and remotely located equipment operating from batteries or solar power.

The ADP160, ADP161, ADP162 and ADP163 LDOs provide up to 150 mA of output current and operate from 2.2-V to 5.5-V supplies. The ADP160 and ADP162 fixed-output voltage and ADP161 and ADP163 adjustable-output voltage regulators are available in TSOT (thin–small-outline transistor) packages, while the ADP160 and ADP162 are additionally available in WLCSP (wafer-level, chip-scale package) packages. The ADP160 and ADP161 also include an output switch to discharge the output load capacitor to zero volts when the device is turned OFF to ensure microcontrollers are in a known state for restart.

"Using innovative design techniques, the ADP16x LDO series provides both ultra-low quiescent current and superior power-supply-rejection performance for digital and RF applications," said Walt Heinzer, product line manager, Power Management Group, Analog Devices, Inc. "These new LDOs are optimized for use with small, 1 µF ceramic capacitors and will meet the requirements of high-performance, space-constrained designs."

Key Features and Benefits

  • Ultra-low quiescent current extends battery life especially during standby operation.
  • Power-supply-rejection ratio of 70 dB at 100 Hz limits AC-input ripple during battery charging.
  • Stability with small 1 µF ceramic output capacitor enables very compact designs when combined with the ADP162 LDO in a 1 mm x 1 mm WLCSP package.
  • An initial accuracy of ±1 percent meets the needs of 1.8 V, 1.5 V and 1.2 V systems.

Availability and Pricing

Product Availability Quick Output
Discharge Switch
Vout Price Each
Per 1,000
ADP160 Volume production now Yes Fixed 1.2 V to 4.2 V $0.34 1.6 mm x 2.9 mm, 5 Lead TSOT
1 mm x 1 mm, 4 Ball WLCSP
ADP161 Volume production now Yes Adjustable 1.2 V to 5.0 V $0.34 1.6 mm x 2.9 mm, 5 Lead TSOT
ADP162 Volume production now No Fixed 1.2 V to 4.2 V $0.34 1.6 mm x 2.9 mm, 5 Lead TSOT
1 mm x 1 mm, 4 Ball WLCSP
ADP163 Volume production now No Adjustable 1.2 V to 5.0 V $0.34 1.6 mm x 2.9 mm, 5 Lead TSOT

Redykit™ Evaluation Kits are available to simplify product evaluation. The kits contain evaluation boards and additional devices with other voltage options. In addition, a linear regulator tool can be downloaded from ADIsimPower™ Resources and Tools for Power Management tab on ADI's power management Website. The tool generates a bill of materials with complete operating conditions to finish the full circuit design. For more information and to download data sheets visit:,,,

ADI in Power Management

Analog Devices brings world-class signal processing prowess to a portfolio of innovative power management ICs that complement high-performance signal processing functions in a wide range of portable and fixed-power applications in consumer electronics, medical equipment, industrial and instrumentation, and communications infrastructure. By supporting signal chain design requirements, such as dynamic range, transient performance, and reliability, ADI helps customers solve complex power challenges easily and quickly, differentiate their products and get to market faster. Learn more about ADI's power management solutions at

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 100,000 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 is included in the S&P 500 Index.

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Editor's Contact Information:

Howard Wisniowski

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