Analog Devices Inc./Maxim Integrated MAX662ACPA+

Overview

MAX662ACPA+ from Maxim Integrated is a regulated +12V, 30mA charge-pump DC-DC converter designed for flash memory programming. It delivers ±5% output regulation from 4.75V–5.5V input, requires no inductor, uses only four external capacitors, and operates across 0°C to +70°C. Its primary system role is generating V_PP programming voltage for byte-wide flash EEPROMs.

For engineers reviewing the MAX662ACPA+ datasheet, MAX662ACPA+ pinout, MAX662ACPA+ application, or MAX662ACPA+ equivalent, key selection criteria include guaranteed 30mA output at ±5% regulation, 0.5µA shutdown current, 185µA quiescent current, and compatibility with compact 8-pin DIP packaging for legacy board layouts.

Technical Context

The MAX662ACPA+ employs a pulse-skipping feedback control scheme to regulate its +12V output by dynamically adjusting charge-pump switching frequency based on load and input voltage. It uses two external flying capacitors (C1, C2) and internal CMOS switches arranged in a voltage-tripling topology to generate V_OUT from V_CC.

Its shutdown function is TTL/CMOS-compatible with internal V_CC pull-up; asserting SHDN high halts pumping and connects V_OUT to V_CC via a 1kΩ switch. Oscillation occurs at nominally 500kHz under full load, scaling down at lighter loads to maintain regulation efficiency.

Key Specifications

Pinout & Package

MAX662ACPA+ is supplied in an 8-pin plastic DIP package (0.300" wide), footprint-compatible with legacy through-hole assembly processes and socket-based prototyping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar +12V charge-pump converter applications.

Compared with MAX662ACSA+, the MAX662ACPA+ offers identical regulation and shutdown behavior but suits legacy through-hole assembly and higher ambient temperature tolerance. Compared with MAX734CPA+, it trades higher output current and efficiency for inductor-free simplicity and smaller footprint-critical for compact flash programmers.

Availability

MAX662ACPA+ is available at Aetrix Electronics and suitable for flash memory programming supplies, compact op-amp bias rails, and low-voltage MOSFET gate drive circuits requiring stable component supply across commercial temperature ranges.

Supply support for MAX662ACPA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX662A product line was designed specifically to replace inductor-based solutions in flash memory programming and low-power +12V bias applications-emphasizing small size, zero magnetic components, and direct microprocessor interface.

FAQ

What is the maximum continuous output current specification for the MAX662ACPA+?

The MAX662ACPA+ guarantees 30mA continuous output current across its full operating temperature range (0°C to +70°C). While the absolute maximum rating allows 50mA, sustained operation above 30mA may cause output voltage droop beyond ±5% regulation or exceed thermal limits-especially in the plastic DIP package. Designers should verify load transients using the LOAD-TRANSIENT RESPONSE graph in the datasheet.

Does the MAX662ACPA+ require an external inductor?

No, the MAX662ACPA+ does not require an external inductor. It uses a charge-pump architecture with two external flying capacitors (C1 and C2) and internal CMOS switches to achieve voltage tripling. This eliminates inductor-related EMI, size, and cost-making the MAX662ACPA+ ideal for compact flash programming supplies where magnetic components are undesirable.

How does the shutdown function operate on the MAX662ACPA+?

The MAX662ACPA+ enters shutdown when the SHDN pin is driven high (TTL/CMOS-compatible). In this state, internal charge-pump switching halts, and V_OUT is connected to V_CC through a 1kΩ internal switch. Shutdown current drops to 0.5µA, and V_OUT decays to V_CC in ~13ms. Asserting SHDN low restores +12V output in ~400µs-enabling precise microprocessor-controlled flash programming windows.

Can the MAX662ACPA+ be used outside the 0°C to +70°C temperature range?

The MAX662ACPA+ is rated for 0°C to +70°C operation only. For extended temperature applications, consider the MAX662AEPA+ (–40°C to +85°C) or MAX662AMJA (–55°C to +125°C), which share identical pinout and electrical behavior but undergo additional screening. Using the MAX662ACPA+ outside its specified range risks output regulation drift, reduced output current, or premature failure-particularly under sustained 30mA load.

What capacitor values are recommended for stable operation of the MAX662ACPA+?

For stable operation, the MAX662ACPA+ requires: C1 and C2 = 0.22µF ceramic (commercial temp) or 1.0µF tantalum (extended/military); C4 (input bypass) = 4.7µF tantalum; C5 (output filter) = 4.7µF tantalum. Ceramic alternatives allow C4/C5 reduction to 2µF/1µF respectively-but increase ripple. All capacitors must be placed with minimal trace length, prioritized in order: C4, C5, C1, C2.