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MAX660CPA

MAX660CPA

Maxim Integrated (Analog Devices)
Small charge-pump voltage converter available in DIP-8 offering similar functionality for low-current negative or doubled rails.
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Overview

The MAX660CPA is a charge-pump voltage converter designed for generating negative or doubled voltage rails from a single positive supply. It supports input voltages from 1.5V to 5.5V and can deliver up to 100mA of output current. This device is a pin-compatible upgrade for the ICL7660, offering improved performance with low operating current and high conversion efficiency.

Why Choose This Part

Engineers benefit from the MAX660CPA's high conversion efficiency, typically 88% at 100mA, reducing power loss. Its low operating current of 120uA (no load) makes it suitable for battery-powered applications. The selectable oscillator frequency (10kHz or 80kHz) provides flexibility for optimizing component size and efficiency tradeoffs, and it requires only small external capacitors.

Applications

Laptop Computers
Generating specialized voltage rails for various internal subsystems within laptop computers.
Medical Instruments
Providing isolated or inverted power supplies for sensitive medical instrumentation, where low noise and small size are critical.
Interface Power Supplies
Creating specific positive or negative voltage levels required for interface circuits and communication protocols.
Hand-Held Instruments
Delivering efficient power conversion for portable, battery-powered devices, leveraging its low operating current and small external capacitor requirements.
Operational-Amplifier Power Supplies
Generating negative supply rails for single-supply operational amplifiers or other analog circuits requiring bipolar power.

Key Specifications

Function Ratiometric
Topology Charge Pump
Output Type Fixed
Mounting Type Through Hole
Package / Case 8-DIP (0.300", 7.62mm)
Current - Output 100mA
Number of Outputs 1
Output Configuration Positive or Negative
Frequency - Switching 10kHz, 80kHz
Operating Temperature 0degC ~ 70degC (TA)
Synchronous Rectifier No
Voltage - Input (Max) 5.5V
Voltage - Input (Min) 1.5V
Supplier Device Package 8-PDIP
Voltage - Output (Min/Fixed) -Vin, 2Vin

Getting Started

To get started with the MAX660CPA, design engineers can integrate it directly into their prototypes on a breadboard or custom PCB due to its through-hole DIP-8 package. External flying capacitors are needed for the charge pump operation, typically 10uF for C1 and C2, as well as input/output filter capacitors. Consult the datasheet for recommended capacitor types and layout guidelines to ensure stable operation and optimal efficiency.

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