Document
HT77xxS
100mA PFM Synchronous
Step-up DC/DC Converter
Features
• Low start-up voltage: 0.7V (Typ.) • High efficiency: 1.8V ≤ VOUT ≤ 2.2V upper 80%,
2.7V ≤ VOUT ≤ 5.0V upper 85% (Typ.) • 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 IDD: 4μA (Typ.) • Low ripple and low noise • Low shutdown current: 0.1μA (Typ.) • TO92, SOT89, SOT23 and SOT23-5 package
Applications
• Palmtops/PDAs • Portable communicators/Smartphones • Cameras/Camcorders • Battery-powered equipment
General Description
The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up voltage as well as high output voltage accuracy. Being manufactured using CMOS t.