Features
Low start-up voltage: 0.6V (Typ.)
High efficiency: 85% (Typ.)
High output voltage accuracy: 2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
Ultra low supply current IDD2: 4 A (Typ.)
Low ripple and low noise
Low shutdown current: 0.5 A (Typ.)
TO-92, SOT-89 and SOT-25 package
Applications
Palmtops/PDAs
Portable communicators/Smartphones
Cameras/CamcordersFeatures
Low start-up voltage: 0.6V (Typ.)
High efficiency: 85% (Typ.)
High output voltage accuracy: 2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
Ultra low supply current IDD2: 4 A (Typ.)
Low ripple and low noise
Low shutdown current: 0.5 A (Typ.)
TO-92, SOT-89 and SOT-25 package
ApplicationsFeatures
Low start-up voltage: 0.6V (Typ.)
High efficiency: 85% (Typ.)
High output voltage accuracy: 2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
Ultra low supply current IDD2: 4 A (Typ.)
Low ripple and low noise
Low shutdown current: 0.5 A (Typ.)
TO-92, SOT-89 and SOT-25 package
Applications
Palmtops/PDAs
Portable communicators/Smartphones
Cameras/Camcorders
Battery-powered equipment
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 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures 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 TO-92, SOT-89 and SOT-25 packages.
For SOT-25 package, it also build-in a chip enable function
to reduce power consumption during shutdown
Palmtops/PDAs
Portable communicators/Smartphones
Cameras/CamcordersFeatures
Low start-up voltage: 0.6V (Typ.)
High efficiency: 85% (Typ.)
High output voltage accuracy: 2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
Ultra low supply current IDD2: 4 A (Typ.)
Low ripple and low noise
Low shutdown current: 0.5 A (Typ.)
TO-92, SOT-89 and SOT-25 package
Applications
Palmtops/PDAs
Portable communicators/Smartphones
Cameras/Camcorders
Battery-powered equipment
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 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures 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 TO-92, SOT-89 and SOT-25 packages.
For SOT-25 package, it also build-in a chip enableFeatures
Low start-up voltage: 0.6V (Typ.)
High efficiency: 85% (Typ.)
High output voltage accuracy: 2.5%
Output voltage: 2.7V, 3.0V, 3.3V, 3.7V, 5.0V
Ultra low supply current IDD2: 4 A (Typ.)
Low ripple and low noise
Low shutdown current: 0.5 A (Typ.)
TO-92, SOT-89 and SOT-25 package
Applications
Palmtops/PDAs
Portable communicators/Smartphones
Cameras/Camcorders
Battery-powered equipment
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 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures 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 TO-92, SOT-89 and SOT-25 packages.
For SOT-25 package, it also build-in a chip enable function
to reduce power consumption during shutdown function
to reduce power consumption during shutdown
Battery-powered equipment
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 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures 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 TO-92, SOT-89 and SOT-25 packages.
For SOT-25 package, it also build-in a chip enable function
to reduce power consumption during shutdown
Battery-powered equipment
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 2.7V, 3.0V,
3.3V, 3.7V or 5.0V. CMOS technology ensures 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 TO-92, SOT-89 and SOT-25 packages.
For SOT-25 package, it also build-in a chip enable function
to reduce power consumption during shutdown