2A 150KHz PWM Buck DC/DC Converter EC9309
Features
General Description
3.3V,5V and adjustable output Versions
The EC9309 is a series of easy to use fixed and
adjustable step-down (buck) switch-mode voltage
regulators. These devices are available in fixed output
voltage of 3.3V, 5V, and an adjustable output version.
Both versions are capable of driving a 2A load with
excellent line and load regulation.
Output adjustable from 1.23V to 43V
Fixed 150KHz frequency internal oscillator
Guaranteed 2A output load current
Input voltage range up to 45V
Low power standby mode, IQ typically 80 μA
TTL shutdown capability
Excellent line and load regulation
Requires only 4 external components
High efficiency
Requiring a minimum number of external components,
these regulators are simple to use and include internal
frequency compensation, and
oscillator.
a
fixed-frequency
Thermal shutdown and current limit protection
Available in SOP-8 and DIP-8 packages
The output voltage is guaranteed to ±3% tolerance
under specified input voltage and output load
conditions. The oscillator frequency is guaranteed to
±15%. External shutdown is included, featuring typically
80 μA standby current. Self protection features include
a two stage frequency reducing current limit for the
output switch and an over temperature shutdown for
complete protection under fault conditions.
Applications
Simple High-efficiency step-down regulator
On-card switching regulators
Positive to negative converter
LCD monitor and LCD TV
DVD recorder and PDP TV
Battery charger
The EC9309 is available in SOP-8 ,and DIP-8
packages.
Step-down to 3.3V for microprocessors
Package Types
Figure 1. Package Types of EC9309
E-CMOS Corp. (www.ecmos.com.tw)
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3I06 Rev. P001