EC9309 Datasheet, PDF (1/15 Pages) E-CMOS Corporation – 2A 150KHz PWM Buck DC/DC Converter

2A 150KHz PWM Buck DC/DC Converter EC9309
General Description
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.
Requiring a minimum number of external components,
these regulators are simple to use and include internal
frequency compensation, and a fixed-frequency
oscillator.
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.
The EC9309 is available in SOP-8 ,and DIP-8
packages.
Features
 3.3V,5V and adjustable output Versions
 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, I_Q typically 80 μA
 TTL shutdown capability
 Excellent line and load regulation
 Requires only 4 external components
 High efficiency
 Thermal shutdown and current limit protection
 Available in SOP-8 and DIP-8 packages
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
 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