HT HT77XXA Series PFM Step-up DC/DC Converter Datasheet

This datasheet details the HT77XXA series of PFM step-up DC/DC converters, covering features, electrical characteristics, and typical performance for output…

Brand: HT
Category: DC/DC Converter
Document type: Datasheet
Language: English
Pages: 18
File format: PDF
File size: 366 KB
Published: 14 October, 2026
Updated: 14 October, 2026
MD5 checksum: AB9E7102A96B8F651591105D9FED0614
PDF: HT HT77XXA Series PFM Step-up DC/DC Converter Datasheet PDF

About this manual

The HT77XXA series consists of Pulse Frequency Modulation (PFM) step-up DC/DC converters designed for high efficiency and low ripple. These devices require only three external components to provide a fixed output voltage, making them ideal for battery-operated applications such as palmtops, PDAs, and portable communicators.

What's inside

Selection Table
Block Diagram
Features
Applications
General Description
Pin Assignment
Absolute Maximum Ratings
Electrical Characteristics
Typical Performance Characteristics

Specifications

Output Voltage	2.7V, 3.0V, 3.3V, 5.0V
Start-up Voltage (Typ.)	0.7V
Efficiency (Typ.)	85%
Available Packages	TO-92, SOT-89, SOT-23, SOT-25

Frequently asked questions

What is the typical start-up voltage for the HT77XXA?

The typical start-up voltage is 0.7V.

How many external components are required for the HT77XXA?

The device requires only three external components to provide a fixed output voltage.

What is the typical efficiency of the HT77XXA series?

The typical efficiency is 85%.

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