eorex
Features
(Preliminary)
EP3101
150 KHz, 3A Asynchronous Step-down Converter
Description
The EP3101 series are monolithic integrated
circuits that provide all the active functions for a
step-down DC/DC converter, capable of driving a
3A load without additional transistor component.
Requiring a minimum number of external
components, the board space can be saved
easily. The external shutdown function can be
controlled by TTL logic level and then come into
standby mode. The internal compensation makes
feedback control have good line and load
regulation without external design. Regarding
protected function, thermal shutdown is to
prevent over temperature operating from damage,
and current limit is against over current operating
of the output switch.
The EP3101 series operates at a switching
frequency of 150KHz thus allowing smaller sized
filter frequency switching regulators. Other
features include a guaranteed ±4％ tolerance on
output voltage under specified input voltage and
output load conditions, and ±15
％
on the
oscillator frequency. The output version includes
fixes 3.3V, 5V, 12V, and an adjustable type. The
packages are available in a standard 5-lead
TO-220(T) package and a 5-lead TO-263(U)..
• Output Voltage: 3.3V, 5V, 12V and Adjustable
Output Version
• Adjustable Version Output Voltage Range,
1.23V to 37V ±4%
• 150KHz±15% Fixed Switching Frequency
• Voltage Mode Asynchronous PWM Control
• Thermal-shutdown and Current-limit Protection
• ON/OFF Shutdown Control Input
• Operating Voltage can be up to
40V
• Output Load Current: 3A
• Low Power Standby Mode
• Built-in on Chip Switching Transistor
• TO263-5L and TO220-5L Packages
Applications
• Simple High-efficiency Step-down Regulator
• On-card Switching Regulators
• Positive to Negative Converter
Typical Application
Jul. 2006
1/13
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EOREX [ EOREX CORPORATION ]
