STMicroelectronics ST662ABD-TRY

Overview

ST662ABD-TRY from STMicroelectronics is a regulated charge pump DC-DC converter designed to generate a stable 12V ±5% output from a 4.5–5.5V input supply, delivering up to 30mA for byte-wide flash memory programming. It features logic-controlled shutdown (1µA quiescent current), requires only external capacitors (no inductor), and uses CMOS-compatible SHDN input with internal pull-up.

For engineers reviewing the ST662ABD-TRY datasheet, ST662ABD-TRY pinout, ST662ABD-TRY application, or ST662ABD-TRY equivalent, key selection criteria include guaranteed 12V regulation under load, shutdown current ≤10µA, oscillator frequency of 400kHz, efficiency ≥72% at 30mA, and SO-8 package compatibility with surface-mount layout constraints.

Technical Context

The ST662ABD-TRY implements a voltage-tripling charge pump topology using two external flying capacitors (C1, C2) switched in alternating phases by an internal 400kHz oscillator. An error amplifier monitors VOUT and disables oscillation when regulation is achieved, ensuring tight 12V ±5% tolerance across temperature and load.

Its shutdown function operates with active-high CMOS logic: pulling SHDN high disables the oscillator and disconnects the charge pumps, forcing VOUT = VCC while reducing total supply current to ≤10µA. The internal pull-up eliminates need for external biasing, simplifying microprocessor interface.

Key Specifications

Pinout & Package

ST662ABD-TRY is housed in an SO-8 (Small Outline-8) package, 5.0mm × 4.0mm body, 1.27mm pitch, with gull-wing leads suitable for reflow soldering and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX680ESA+ and TPS60403DBVR, ST662ABD-TRY uniquely delivers factory-trimmed 12V ±5% output with flash-programming-optimized timing, 30mA capability, and microprocessor-ready shutdown-making it purpose-built for embedded nonvolatile memory systems.

Availability

ST662ABD-TRY is available at Aetrix Electronics and suitable for flash memory programming supplies, EEPROM high-voltage erase circuits, and microcontroller bootloader power systems requiring stable component supply and industrial temperature support.

Supply support for ST662ABD-TRY 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad analog and mixed-signal portfolio.

The ST662 product line targets embedded memory programming applications, delivering compact, inductor-free 12V generation optimized for reliability, low EMI, and seamless integration with 5V microcontroller systems.

FAQ

What is the minimum input voltage required for full 30mA output at 12V?

The ST662ABD-TRY guarantees 30mA output at 12V ±5% with input voltage as low as 4.75V, per electrical characteristics table on page 3 of the datasheet. Below 4.75V, output voltage droops and regulation degrades; operation below 4.5V violates absolute maximum ratings and is not supported.

Can ceramic capacitors replace the recommended tantalum types for C3 and C4?

Yes - ceramic capacitors may be used for C3 (input) and C4 (output) with reduced values: 4.7µF tantalum can be substituted with 2µF ceramic for C3 and 1µF ceramic for C4, provided low-ESR X7R or X5R dielectrics are selected to maintain ripple suppression and transient response.

How does the SHDN pin behave when left unconnected?

Because SHDN has an internal pull-up to VCC, leaving it unconnected results in automatic shutdown mode: VOUT = VCC and supply current drops to ≤10µA. To enable normal operation, SHDN must be actively driven low (≤0.4V) by a microcontroller GPIO or open-drain driver.

Is parallel operation of multiple ST662ABD-TRY units supported in the datasheet?

Yes - the datasheet explicitly describes parallel configuration on page 8, including schematic (Figure 19) and component table (Table 2). Two units in parallel double output current to 60mA, with shared input/output capacitors sized accordingly and individual flying capacitors retained per device.