eorex
Features
(Preliminary)
EP3102
150 KHz, 2A Asynchronous Step-down Converter
Description
The EP3102 is a monolithic integrated circuit that
provide all the active functions for a step-down
switching regulator, capable of driving a 2A load
without
additional
transistor
component.
Requiring a minimum number of external
component, 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 EP3102 operates at a
switching frequency of 150KHz thus allowing
smaller sized filter components than what would
be needed with lower 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 included fixed 3.3V, 5V, 12V, and an
adjustable type. The package is available in a
standard 8-lead SOP8.
• 3.3V, 5V, 12V and Adjustable Output Version
• Adjustable Version Output Voltage Range,
1.23V to 37V +4% Max over Line and Load
Condition
• Input Voltage Range up to 40V
• Output Load Current: 2A
• 150 KHz Fixed Frequency Internal Oscillator
• Voltage Mode Non-synchronous PWM Control
• Thermal-shutdown and Current-limit Protection
• ON/OFF Shutdown Control Input
• Low Power Standby Mode
• Built-in Switching Transistor on Chip
• SOP-8L package
Applications
• Simple High-efficiency Step-down (Buck)
Regulator
• Efficient Pre-regulator for Linear Regulators
• On-card Switching Regulators
• Positive to Negative Converter
• Battery Charger
Typical Application
Nov. 2006
1/10
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