Microchip Technology TC7662BCOA713

Overview

TC7662BCOA713 from Microchip Technology is an 8-pin SOIC charge pump DC-DC voltage converter that generates a regulated negative output (–V_IN) from a +1.5V to +15V input using only two external capacitors. It features a nominal 10 kHz oscillator (35 kHz with BOOST pin tied to V+), 96% power efficiency at 5V/5kΩ, <100 Ω output source resistance at 20 mA, and operates across 0°C to +70°C. It is used in RS-232 power supplies, data acquisition instrumentation, and dual-rail analog systems.

For engineers reviewing the TC7662BCOA713 datasheet, TC7662BCOA713 pinout, TC7662BCOA713 application, or TC7662BCOA713 equivalent, this page delivers verified electrical parameters, validated SOIC package mapping, confirmed pin functions per Microchip DS21469A, and real-world design context for ±5V generation, supply splitting, and low-noise negative rail synthesis without inductors.

Technical Context

The TC7662BCOA713 implements a four-switch MOS charge pump topology with internal logic-controlled substrate biasing to prevent latch-up across its full operating range. Its RC oscillator supports three frequency modes: default 10 kHz (pin 1 open/GND), boosted 35 kHz (pin 1 = V+), or externally reduced down to ~1 kHz via OSC pin capacitor.

It integrates an internal voltage regulator that can be disabled via the LV pin for improved low-voltage operation (<3.5V input); above 3.5V, LV must remain open to maintain latch-up immunity. Output impedance is dominated by switch R_ON, capacitor ESR, and f_OSC-dependent 1/(f·C) terms - making BOOST pin use critical for high-current or surface-mount designs requiring smaller capacitors.

Key Specifications

Pinout & Package

TC7662BCOA713 is housed in an 8-pin Small Outline Integrated Circuit (SOIC-8) package with standard 1.27 mm pitch, JEDEC MS-012AC compliant dimensions, and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TC7662BCOA713, TC7660CPA offers simpler legacy compatibility but sacrifices efficiency and flexibility, while MAX680CPA+ delivers faster switching and lower ripple at the cost of reduced input voltage range and no low-V_IN optimization - making TC7662BCOA713 optimal for wide-input, space-sensitive, and battery-operated designs.

Availability

TC7662BCOA713 is available at Aetrix Electronics and suitable for RS-232 interface design, portable instrumentation, and industrial analog signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TC7662BCOA713 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on embedded control and energy-efficient solutions.

The TC7662B product line was designed specifically for inductorless DC-DC voltage inversion in space- and cost-constrained applications such as portable test equipment, sensor interfaces, and legacy system upgrades requiring pin-compatible replacements.

FAQ

What is the minimum input voltage supported by the TC7662BCOA713?

The TC7662BCOA713 supports a minimum input voltage of +1.5V when the LV pin is grounded. This configuration disables the internal voltage regulator to improve low-voltage operation. At inputs below 3.5V, grounding LV is mandatory; above 3.5V, LV must remain open to ensure latch-up immunity. The TC7662BCOA713 maintains stable inversion down to 1.5V with appropriate capacitor selection and load conditions.

Can the TC7662BCOA713 generate voltages other than –V_IN?

Yes, the TC7662BCOA713 can generate non-inverted outputs including positive voltage doubling (e.g., +9V from +5V) and supply splitting (±V_S/2) using modified external component configurations. These modes require additional diodes or capacitor routing per Figures 9 and 11 in DS21469A. The TC7662BCOA713 retains its core charge pump functionality in all configurations but exhibits higher output impedance in cascaded or doubled modes due to cumulative switch losses.

How does the BOOST pin affect capacitor selection for the TC7662BCOA713?

When the BOOST pin of the TC7662BCOA713 is tied to V+, oscillator frequency increases from 10 kHz to 35 kHz, reducing the required capacitance values for C1 and C2 by approximately 3.5×. For example, 10 µF electrolytics at 10 kHz can be replaced with 0.1 µF X7R ceramics at 35 kHz - significantly shrinking PCB area, improving temperature stability, and eliminating electrolytic aging concerns. This is especially valuable in surface-mount designs targeting high reliability.

Is the TC7662BCOA713 pin-compatible with the ICL7660?

Yes, the TC7662BCOA713 is explicitly designed as a pin-compatible, functionally enhanced upgrade to the industry-standard ICL7660. It uses identical SOIC-8 pinout, shares the same V+, GND, CAP+, CAP–, VOUT, and OSC connections, and adds only the BOOST and LV pins - both of which are NC or optional in ICL7660-compatible layouts. No PCB changes are required to replace ICL7660 with TC7662BCOA713, delivering immediate efficiency and frequency benefits.

What is the maximum continuous output current of the TC7662BCOA713?

The TC7662BCOA713 does not specify a hard current limit but defines output behavior via source resistance: 65 Ω typical at 20 mA and 0°C to +70°C. At 20 mA, expected voltage droop is ~1.3V - limiting practical continuous output to ≤10 mA for ≤5% regulation error. Higher currents are possible with forced air cooling, larger capacitors, and BOOST pin activation, but thermal derating above 70°C and output impedance rise must be verified per application load profile and ambient conditions.