HT77xx PFM Asynchronous Step-up DC to DC Converter (100mA)
●General Description
■The HT77xx series is a set of PFM step-up DC/DC converter with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only three external components to provide a fixed output voltage of 1.8V, 2.2V,2.7V, 3.0V, 3.3V, 3.7V or 5.0V. CMOS technology en-sures ultra low supply current and makes them ideal for battery-operated applications powered from one or more cells.
■The HT77xx consists of an oscillator, a PFM control circuit, a driver transistor, a reference voltage unit, and a high speed comparator. They employ pulse frequency modulation (PFM) for minimum supply current and ripple at light output loading. These devices are available in space saving 3-pin TO92, 3-pin SOT89, 3-pin SOT23and 5-pin SOT23 packages. For 5-pin SOT23 package,it also build-in a chip enable function to reduce power consumption during shutdown mode.
●Features
■Low start-up voltage: 0.7V (Typ.), 0.9V (Max.)
■High efficiency: 85% (Typ.), VOUT³2.7V
■High output voltage accuracy:±2.5%
■Output voltage: 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V,5.0V
■Output current up to 100mA
■Ultra low supply current IDD2:4mA (Typ.)
■Low ripple and low noise
■Low shutdown current: 0.5mA (Typ.)
■3-pin TO92, 3-pin SOT89, 3-pin SOT23 and5-pin SOT23 package
|
HT77xx 、 HT7718 、 HT7722 、 HT7727 、 HT7730 、 HT7733 、 HT7737 、 HT7750 |
|
|
[ Palmtops ][ PDAs ][ Portable communicators ][ Smartphones ][ Cameras ][ Camcorders ][ Battery-powered equipment ] |
|
|
Datasheet |
|
|
|
|
Please see the document for details |
|
|
|
|
|
|
|
|
TO92;SOT89;SOT23;SOT23-5 |
|
|
English Chinese Chinese and English Japanese |
|
|
August 4, 2018 |
|
|
Rev 2.10 |
|
|
|
|
|
711 KB |
- +1 Like
- Add to Favorites
Recommend
- Bidirectional DC-DC Converter: A Two-Way Power Conversion Solution
- Bidirectional DC-DC Converter: A Comprehensive Guide
- DPX Series DC-DC Converter: Efficient and Reliable Power Conversion Solution
- China IXXYY Series DC-DC Converter Is Used in A Variety of Applications Including Telecommunications, Automotive, Industrial
- DPX Series DC-DC Converter: An Efficient Solution for Power Conversion
- Bidirectional DC-DC Converter: A Guide for Power Conversion in Both Directions
- XXYY Series DC-DC Converter: An Overview
- Bidirectional DC-DC Converter: A Versatile Power Conversion Solution
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
