Datasheet Holtek HT7727FA — Даташит

HT77xxFA
TinyPowerTM 200mA
Synchronous Step-up Converter
Features General Description • Ultra low supply current : 4μA The HT77xxFA series is a set of synchronous step-up
DC/DC converters with high efficiency. The series
devices have the advantage of extremely low start-up
voltage, which is suitable for 1-cell Alkaline battery
applications. Being manufactured using CMOS
technology ensures ultra low supply current to extend
power endurance for portable products. The devices
require only three external components to provide a
fixed output voltage of 2.7V, 3.0V, 3.3V, 3.7V or 5.0V. • Low ripple and low noise
• High efficiency up to 95%
• Fixed output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
• High output voltage accuracy: ±2%
• Output current:
Up to 200mA @ 0.6×VOUT≤VIN≤VOUT
• Low shutdown current: 0.1μA (Typ.) In order to save PCB layout area, these devices are
using synchronous topology integrated schottky
diode, and also using 3-pin SOT89, 3-pin SOT23 and
5-pin SOT23 packages. For 5-pin SOT23 package
type, it also includes an internal chip enable function
to reduce power consumption in the shutdown mode. • Package types: 3-pin SOT89, 3-pin SOT23 and …