LOWĆPOWER BICMOS CURRENTĆMODE PWM
D Qualified for Automotive Applications
D ESD Protection Exceeds 200 V Using
Machine Model (C = 200 pF, R = 0)
D 100-µA Typical Starting Supply Current
D 500-µA Typical Operating Supply Current
D Operation to 1 MHz
D Internal Soft Start
D Internal Fault Soft Start
SGLS121C − JULY 2002 − REVISED APRIL 2008
D Internal Leading-Edge Blanking of the
Current Sense Signal
D 1-Amp Totem-Pole Output
D 70-ns Typical Response from
Current-Sense to Gate Drive Output
D 1.5% Tolerance Voltage Reference
D Same Pinout as UC3842 and UC3842A
The UCC2800/1/2/3/4/5 family of high-speed, low-power integrated circuits contain all of the control and drive
components required for off-line and dc-to-dc fixed frequency current-mode switching power supplies with
minimal parts count.
These devices have the same pin configuration as the UC2842/3/4/5 family and also offer the added features
of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
The UCC2800/1/2/3/4/5 family offers choice of maximum duty cycle and critical voltage levels. Lower reference
parts such as the UCC2803 and UCC2805 fit best into battery operated systems, while the higher reference
and the higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line
The UCC280xQDRQ1 series is specified for the automotive temperature range of −40_C to 125_C, and
qualified in accordance with AEC-Q100 stress test qualification for integrated circuits.
MAXIMUM DUTY CYCLE
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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