ADM8660ARZ-REEL for Efficient Power Supply Design
Overview
The ADM8660ARZ-REEL, a charge pump DC/DC converter from Analog Devices (ADI), can achieve voltage inversion (–Vin output) or voltage multiplication (2×Vin output) without the need for an inductor. This device features a wide operating voltage range (1.5V to 5.5V) and low quiescent current (typically 120µA), making it widely used in low-power portable devices and analog circuits.
The ADM8660ARZ features a built-in oscillator and power switch, requiring only two external capacitors for output voltage regulation. This chip offers high integration and simplified design. It is commonly used in applications such as negative power supply generation for operational amplifiers, battery-powered systems, telecommunications modules, and sensor interface circuits. It is particularly well-suited for portable devices with stringent requirements for power supply noise and size.
Core parameters
parameter | Numerical |
Function Type | Charge Pump Voltage Converter (Inverting/Multiplying) |
Input voltage range | 1.5V ~ 5.5V |
Output voltage | –Vin (inverting mode) or 2×Vin (doubling mode) |
Maximum output current | 20mA (@ 3V input) |
Quiescent current | 120µA (typical) |
conversion efficiency | Up to 98% (typical) |
Operating frequency | 25kHz (internal oscillator) |
Shutdown control pin | Support (SHDN pin) |
Startup time | Typical 2ms |
Package Type | SOIC-8 (R package) |
Operating temperature range | –40°C to +85°C |
Environmental standards | RoHS compliant lead-free |
Features
Inductor-free power conversion
Using a charge pump architecture, only two external capacitors are needed to achieve voltage inversion or multiplication.
Low power consumption and high efficiency
With a typical quiescent current of only 120µA and efficiency up to 98%, it is ideal for battery-powered systems.
Flexible output mode
Pin configuration can achieve inverting output (–Vin) or multiplying output (2×Vin) .
Low noise design
No inductor switching spike noise, suitable for analog and precision circuit power supply.
Shutdown control function
A SHDN pin is provided to shut down the chip when not in use, further saving power.
Typical application scenarios
Op amp negative supply generation
Generates ± voltages in single-supply systems to provide the negative rail for op amps.
Battery-powered portable devices
Provides negative voltage to drive sensors, display drivers, or audio amplifiers.
Communications and network equipment
Used to generate negative bias voltage in interface circuits or modems.
Data acquisition system
Provide low noise auxiliary power supply for ADC, DAC or amplifier circuit.
Embedded Systems
Generate symmetrical power supplies or bipolar driver supplies in MCU or FPGA systems.
Performance Comparison
Index | ADM8660ARZ-REEL | ICL7660A (traditional charge pump) |
Input voltage range | 1.5V ~ 5.5V | 1.5V ~ 10V |
Quiescent current | 120µA (typical) | 200µA (typical) |
Output current capability | 20mA (@3V input) | 10mA (@3V input) |
Shutdown function | Support (SHDN pin) | Not supported |
efficiency | Up to 98% | About 90% |
Switching frequency | 25kHz | 10kHz |
Compared with the traditional ICL7660, ADM8660ARZ has lower power consumption, higher efficiency and stronger output capability, making it suitable for the next generation of portable designs.
Manufacturer Profile: Analog Devices (ADI)
Analog Devices is a leading global manufacturer of high-performance analog and power management ICs, with products widely used in communications, industrial, medical, and automotive applications. The ADM8660 series, ADI’s classic low-power charge pump converter product line, is favored by engineers for its high efficiency, low noise, and simple design.
Why choose the ADM8660ARZ-REEL?
● No inductor required , simplifying circuit layout
● Supports voltage inversion and multiplication , flexible application
● Low power consumption (Iq only 120µA) to extend battery life
● High efficiency (up to 98%) to reduce heat generation
● Low noise output , suitable for analog circuits and high-precision systems
● With shutdown function (SHDN) for energy-saving control
Frequently Asked Questions (FAQ)
Q1: Can the ADM8660ARZ-REEL be used to generate ±V supplies?
A: Yes. The ADM8660ARZ is a charge-pump voltage inverter that converts a single supply (such as +5V ) to a –5V output. This makes it ideal for providing negative voltages for analog circuits requiring bipolar power supplies, such as operational amplifiers, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs). Its integrated oscillator and switch eliminate the need for complex external control.
Q2: Is an external inductor required?
A: No. The ADM8660ARZ uses a charge pump architecture that requires only two low-ESR capacitors for stable operation, greatly simplifying power supply design. We recommend selecting the appropriate capacitor size and withstand voltage specifications based on the input voltage and load current to ensure stable output voltage and low ripple.
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