HT7727BA

HOLTEK Semiconductor Inc.
HT77xxBA 5V/200mA PFM Asynchronous Step-up Converter Features General Description • Low startup voltage: 0.85V (Typical) The HT77xxBA series is a set of PFM step-up DC/DC converters with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only few external components to provide a fixed output voltage of 2.7V, 3.0V,...
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Технические характеристики

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Входное напряжение
Параметры выходов
Возможности Switching Regulator, CMOS, PSSO3
Номинальное входное напряжение
Напряжение 1 выхода
Схема параллельного включения
Сертификаты медицинские
Размер 4.54×2.48×1.6 мм
Рабочая температура
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HT77xxBA 5V/200mA PFM Asynchronous Step-up Converter Features General Description • Low startup voltage: 0.85V (Typical) The HT77xxBA series is a set of PFM step-up DC/DC converters with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only few external components to provide a fixed output voltage of 2.7V, 3.0V, 3.3V, 3.7V and 5.0V. CMOS technology ensures low supply current and makes them ideal for battery-operated applications powered from one or more cells. • High efficiency up to 85% • Ultra low no load input current • High output voltage accuracy: ±2.5% • Fixed output voltage: 2.7V, 3.0V, 3.3V, 3.7V and 5.0V • Ultra low shutdown current: 0.1μA (Typical) • Package type: 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 The HT77xxBA series consist 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 SOT89, 3-pin SOT23 and 5-pin SOT23 packages. For the 5-pin SOT23 package, it also contains a chip enable function to reduce power consumption during shutdown mode. Applications • One, two and three cell alkaline and NiMH/NiCd bettery powered portable products • Portable equipment/handheld devices Typical Application Circuits D1: 1N5817 L1: 47μH~100μH (Coil Inductor) VIN LX VOUT OUT HT77xxBA C1: 47μF OFF ON CE GND R1* C2: 22μF (Ceramic) * R1=0.15Ω is recommended to improve ripple performance Selection Table Part No. Output Voltage HT7727BA 2.7V HT7730BA 3.0V HT7733BA 3.3V HT7737BA 3.7V HT7750BA 5.0V Packages Markings SOT89 SOT23 SOT23-5 77xxBA marking for SOT89 type xxBA marking for SOT23 and SOT23-5 types Note: ″xx″ stands for output voltages. Rev. 1.20 1 August 17, 2021 PDF
Документация на HT7733BA 

Дата модификации: 17.08.2021

Размер: 1.08 Мб

21 стр.

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