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UCC28C40, UCC28...
Product Folder
Order Now
Technical Documents
Tools & Software
Support & Community
Reference Design
UCC28C40, UCC28C41, UCC28C42, UCC28C43, UCC28C44, UCC28C45 UCC38C40, UCC38C41, UCC38C42, UCC38C43, UCC38C44, UCC38C45
SLUS458G – JULY 2000 – REVISED JANUARY 2017
UCCx8C4x Bi
CMOS Low-Power Current-Mode PWM Controller
1 Features
1 Enhanced Replacement for UCx84x and UCx84xA Family With Pin-to-Pin Compatibility
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 Over-Current Limiting
±1-A Peak Output Current
Rail-to-Rail Output Swings with 25-ns Rise and 20-ns Fall Times
±1% Initial Trimmed 2.5-V Error Amplifier Reference
Trimmed Oscillator Discharge Current
New Under
voltage Lockout Versions
VSSOP-8 Package Minimizes Board Space
2 Applications
Switch-Mode Power Supplies
General Purpose DC-DC or Off-Line Isolated Power Converters
Board Mount Power Modules
3 Description
UCCx8C4x family are high-performance, currentmode PWM controllers. The UCCx8C4x is an enhanced Bi
CMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The Bi
CMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency. In addition, lower startup
voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –...