Analog Devices Inc./Maxim Integrated MAX606EUA

Overview

The MAX606EUA from Maxim Integrated is a CMOS step-up DC-DC converter optimized for flash memory and PCMCIA card applications. It delivers a ±4% accurate 5V or 12V output (or adjustable up to 12.5V) from a 3V–5.5V input, supports up to 180mA load current at 5V, switches at up to 1MHz, and fits in ultra-low-profile 8-pin µMAX package (max height 1.11mm).

For engineers reviewing the MAX606EUA datasheet, MAX606EUA pinout, MAX606EUA application, or MAX606EUA equivalent, key selection considerations include its 1MHz switching frequency enabling minimal external component footprint, logic-controlled 1µA shutdown, user-configurable soft-start, ±4% output regulation accuracy, and compatibility with Type 1 PCMCIA cards requiring sub-1.35mm height.

Technical Context

The MAX606EUA employs a proprietary current-limited pulse-frequency modulation (PFM) control scheme that dynamically adjusts on-time (t_ON = K/V_IN) and off-time based on input and output voltages-K = 3µs·V typical-to maintain high efficiency across wide load and voltage ranges. It integrates an n-channel power MOSFET with 0.4Ω typical on-resistance and uses internal reference (2.00V ±0.04V) for feedback regulation.

This device operates in discontinuous-conduction mode by default but supports continuous-conduction operation with appropriate inductor selection (5µH recommended). Its undervoltage lockout activates below 2.8V, and shutdown mode reduces quiescent current to 0.01µA while discharging the soft-start capacitor.

Key Specifications

Pinout & Package

The MAX606EUA is housed in an 8-pin µMAX package (3.0mm × 3.0mm, max height 1.11mm), designed for surface-mount assembly in space-constrained card-edge applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up DC-DC converter applications.

Compared with MAX607EUA and TPS61040DBVR, the MAX606EUA uniquely balances 1MHz operation, 180mA 5V capability, and Type 1 PCMCIA mechanical compliance - making it the only option that meets both 0.25in² footprint and ≤1.35mm height requirements simultaneously.

Availability

MAX606EUA is available at Aetrix Electronics and suitable for PCMCIA card designs, flash memory programming systems, and compact digital camera power supplies requiring stable component supply with guaranteed long-term availability.

Supply support for MAX606EUA 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 consumer applications.

The MAX606EUA belongs to Maxim's low-profile DC-DC converter product line, engineered specifically for space- and height-constrained portable memory and peripheral cards - emphasizing minimal external component count and mechanical compliance with PCMCIA standards.

FAQ

What output voltage options does the MAX606EUA support?

MAX606EUA supports three output configurations: fixed 5V (FB tied to IN), fixed 12V (FB tied to GND), or adjustable 3.0V–12.5V using an external resistor divider on the FB pin. The internal reference is precisely 2.00V ±0.04V, enabling accurate programmable outputs without external DACs or digital interfaces. This flexibility makes MAX606EUA suitable for diverse flash memory and PCMCIA applications requiring different voltage rails.

How does the MAX606EUA achieve its ultra-low profile?

MAX606EUA achieves its 1.11mm maximum height through the 8-pin µMAX package - a proprietary Maxim封装 measuring 3.0mm × 3.0mm with fine-pitch leads. Combined with 1MHz switching, this allows use of a thin 5µH inductor (1.19mm high) and small 0.68µF ceramic capacitors, enabling full circuit implementation within 0.25in² board area and under 1.35mm total height - meeting Type 1 PCMCIA mechanical specifications. No heatsink or tall components are needed.

Can the MAX606EUA operate from a 3.3V input to generate 12V at 90mA?

Yes, MAX606EUA can deliver 12V at 90mA from a 3.3V input, as confirmed in the Typical Operating Characteristics graphs and Standard Application Circuit (Figure 1). At VIN = 3.3V, the MAX606EUA maintains regulation with ≥85% efficiency and <100mV_p-p output ripple when using recommended components (5µH inductor, MBR0520L Schottky diode, dual 0.68µF ceramics). This capability is essential for flash programming supplies where host voltage is limited to 3.3V.

What is the purpose of the SS (Soft-Start) pin on the MAX606EUA?

The SS pin on MAX606EUA controls startup inrush current by gradually increasing the internal current limit during power-up or wake-from-shutdown. Connecting an external capacitor (e.g., 10nF) to SS sets the soft-start duration - larger values increase delay but reduce peak input current. This prevents voltage droop on weak sources (e.g., aging batteries) and avoids overstressing input capacitors. Omitting the SS capacitor enables fastest possible startup, beneficial for flash access timing-critical applications.

Does the MAX606EUA include undervoltage lockout protection?

Yes, MAX606EUA incorporates undervoltage lockout (UVLO) that disables switching when input voltage falls below 2.8V (typical). During UVLO, the internal power FET is turned off and the soft-start capacitor is discharged to ground. Operation resumes only after VIN rises above the threshold, followed by a full soft-start cycle. This protects downstream circuitry from unstable or brownout conditions and ensures reliable flash programming sequences even with fluctuating battery inputs.