UCC28C4x-EP
BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS
www.ti.com
SGLS352A–DECEMBER 2006–REVISED JANUARY 2007
FEATURES
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Trimmed Oscillator Discharge Current
New Undervoltage Lockout Versions
MSOP-8 Package Minimizes Board Space
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Controlled Baseline
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One Assembly/Test Site, One Fabrication
Site
APPLICATIONS
Extended Temperature Performance of
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Switch-Mode Power Supplies
DC-to-DC Converters
Board Mount Power Modules
–55°C to 125°C
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Enhanced Diminishing Manufacturing Sources
(DMS) Support
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Enhanced Product-Change Notification
DESCRIPTION
(1)
Qualification Pedigree
The UCC28C4x family are high-performance
current-mode PWM controllers. They are enhanced
BiCMOS versions with pin-for-pin compatibility to the
industry standard UC284xA family and UC284x
family of PWM controllers. In addition, lower startup
voltage versions of 7 V are offered as UCC28C40
and UCC28C41.
Enhanced Replacements for UC2842A Family
With Pin-to-Pin Compatibility
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1-MHz Operation
50-µA Standby Current, 100-µA Maximum
Low Operating Current of 2.3 mA at 52 kHz
Fast 35-ns Cycle-by-Cycle Overcurrent
Limiting
Providing
necessary
features
to
control
fixed-frequency, peak current-mode power supplies,
this family offers several performance advantages.
These devices offer high-frequency operation up to
1 MHz with low start-up and operating currents, thus
minimizing start-up loss and low operating power
consumption for improved efficiency. The devices
also feature a fast current-sense-to-output delay time
of 35 ns, and a ±1-A peak output current capability
with improved rise and fall times for driving large
external MOSFETs directly.
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±1-A Peak Output Current
Rail-to-Rail Output Swings With 25-ns Rise
and 20-ns Fall Times
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±1% Initial Trimmed 2.5-V Error Amplifier
Reference
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
The UCC28C4x family is offered in 8-pin package
SOIC (D).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.