Analog Devices Inc./Maxim Integrated MAX662ACSA

Overview

MAX662ACSA from Maxim Integrated is a regulated +12V, 30mA charge-pump DC-DC converter designed for flash memory programming supplies. 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 in an 8-pin narrow SO package.

For engineers reviewing the MAX662ACSA datasheet, MAX662ACSA pinout, MAX662ACSA application, or MAX662ACSA equivalent, key selection criteria include guaranteed 30mA output at ±5% regulation, 0.5µA shutdown current, 185µA quiescent current, and compatibility with byte-wide flash V_PP requirements without magnetic components.

Technical Context

The MAX662ACSA employs a pulse-skipping feedback control scheme to regulate +12V output by dynamically enabling/disabling internal charge-pump switching stages. It uses two external flying capacitors (C1, C2) and two bulk capacitors (C4, C5) to achieve voltage tripling from V_CC.

Its oscillator runs at 500kHz nominal frequency, with variable duty cycling to maintain regulation under load and input voltage variation. Shutdown mode disconnects charge pumps and connects V_OUT to V_CC via a 1kΩ internal switch, reducing supply current to 0.5µA while preserving V_OUT = V_CC.

Key Specifications

Pinout & Package

MAX662ACSA is housed in an 8-pin narrow SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant. Pin 1 marked with dot or notch; pin numbering follows standard SO convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar regulated charge-pump boost converter applications.

Compared with MAX662ACPA and MAX734CSA, the MAX662ACSA uniquely balances inductorless simplicity, 30mA capability, and SO-package density-making it optimal for space-constrained flash programming where 5V input and moderate current suffice.

Availability

MAX662ACSA is available at Aetrix Electronics and suitable for flash memory programming supplies, compact op-amp bias networks, and low-voltage MOSFET gate drivers requiring stable component supply, long-term lifecycle support, and commercial-temperature-grade reliability.

Supply support for MAX662ACSA 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) designs precision analog, mixed-signal, and power-management ICs for industrial, computing, and communications systems.

The MAX662A product line delivers regulated charge-pump DC-DC conversion for non-magnetic, low-noise +12V generation-targeting flash memory programming and compact analog subsystems where inductor-free design is mandatory.

FAQ

What is the guaranteed output current specification for MAX662ACSA?

The MAX662ACSA guarantees 30mA continuous output current across its full operating temperature range (0°C to +70°C) and input voltage range (4.75V to 5.5V). This rating is validated per Maxim's datasheet test conditions and ensures reliable flash memory V_PP supply without derating. Absolute maximum continuous output is 50mA, but sustained operation above 30mA may impact regulation accuracy and thermal performance.

Does MAX662ACSA require an inductor in its application circuit?

No, the MAX662ACSA does not require an inductor. It uses a charge-pump architecture with four external capacitors (two flying caps C1/C2 and two bulk caps C4/C5) to generate +12V from a 5V input. This inductorless design eliminates magnetic EMI, reduces board area, and simplifies layout-key advantages over switch-mode alternatives like the MAX734CSA.

What is the shutdown behavior of MAX662ACSA, and how does it affect VOUT?

When SHDN is driven high, the MAX662ACSA enters shutdown mode, halting all charge-pump switching and connecting V_OUT to V_CC through an internal 1kΩ resistor. V_OUT decays to V_CC in ~13ms. During shutdown, supply current drops to 0.5µA. This behavior allows safe, low-power flash V_PP disable without external FETs or level shifters.

Can MAX662ACSA be used to generate voltages other than +12V?

Yes-the MAX662ACSA can be configured for dual outputs: its base +12V output can feed a diode-capacitor voltage doubler (per Figure 4 in the datasheet) to generate +20V for OTP programming or high-threshold gate drive. While the IC itself regulates only +12V, this external extension leverages its stable 30mA output to derive secondary rails without adding a second regulator IC.

What capacitor types and values are recommended for MAX662ACSA in commercial-temperature applications?

For commercial-temperature use, Maxim recommends 0.22µF ceramic (e.g., Murata GRM42-6Z5U224M50) for C1 and C2 (flying caps), and 4.7µF tantalum (e.g., Sprague 595D475X9016A7) for C4 (input bypass) and C5 (output filter). These values ensure stable regulation, low ripple (<100mV), and minimal board area (<0.1 in²) per the typical operating circuit in Figure 3a.