application INFO available UCC1800/1/2/3/4/5 UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 Low-Power BiCMOS Current-Mode PWM FEATURES DESCRIPTION * 100A Typical Starting Supply Current The UCC1800/1/2/3/4/5 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. * 500A Typical Operating Supply Current * Operation to 1MHz These devices have the same pin configuration as the UC1842/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. * Internal Soft Start * Internal Fault Soft Start * Internal Leading-Edge Blanking of the Current Sense Signal * 1 Amp Totem-Pole Output * 70ns Typical Response from Current-Sense to Gate Drive Output * 1.5% Tolerance Voltage Reference * Same Pinout as UC3842 and UC3842A Part Number UCCx800 UCCx801 UCCx802 UCCx803 UCCx804 UCCx805 The UCC1800/1/2/3/4/5 family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC1803 and UCC1805 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC1802 and UCC1804 make these ideal choices for use in off-line power supplies. o o The UCC180x series is specified for operation from -55 C to +125 C, o o the UCC280x series is specified for operation from -40 C to +85 C, and o o the UCC380x series is specified for operation from 0 C to +70 C. Maximum Duty Cycle 100% 50% 100% 100% 50% 50% Reference Voltage 5V 5V 5V 4V 5V 4V Turn-On Threshold 7.2V 9.4V 12.5V 4.1V 12.5V 4.1V Turn-Off Threshold 6.9V 7.4V 8.3V 3.6V 8.3V 3.6V BLOCK DIAGRAM UDG92009-3 SLUS270C - MARCH 1999 - REVISED JANUARY 2005 UCC1800/1/2/3/4/5 UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 CONNECTION DIAGRAMS ABSOLUTE MAXIMUM RATINGS (Note 1) VCC Voltage (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0V VCC Current (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 30.0mA OUT Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0A OUT Energy (Capacitive Load) . . . . . . . . . . . . . . . . . . . 20.0J Analog Inputs (FB, CS) . . . . . . . . . . . . . . . . . . . . -0.3V to 6.3V Power Dissipation at TA < +25C (N or J Package) . . . . . 1.0W Power Dissipation at TA < +25C (D Package). . . . . . . . 0.65W Power Dissipation at TA < +25C (L Package) . . . . . . . 1.375W Storage Temperature Range. . . . . . . . . . . . . -65C to +150C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . +300C Note 1: Values beyond which damage may occur. All voltages are with respect to GND. All currents are positive into the specified terminal. Consult Unitrode databook for information regarding thermal specifications and limitations of packages. Note 2: In normal operation VCC is powered through a current limiting resistor. Absolute maximum of 12V applies when VCC is driven from a low impedance source such that ICC does not exceed 30mA (which includes gate drive current requirement). The resistor should be sized so that the VCC voltage, under operating conditions is below 12V but above the turn off threshold. TSSOP-8 (Top View) PW Package 1 COMP REF 8 2 FB VCC 7 3 CS OUT 6 4 RC GND 5 DIL-8, SOIC-8 (Top View) J or N, D Package COMP 1 8 REF FB 2 7 VCC CS 3 6 OUT RC 4 5 GND TEMPERATURE AND PACKAGE SELECTION UCC180X UCC280X UCC380X Temperature Range -55C to +125C -40C to +85C 0C to +70C Available Packages J, L N, D, PW N, D, PW LCC-20 (TOP VIEW) L Package ORDERING INFORMATION UCC 80 P ACKAGE P RODUCT OP TION TEMP ERATURE RANGE 2 PACKAGE PIN FUNCTION FUNCTION PIN N/C 1 Comp 2 N/C 3-4 FB 5 N/C 6 CS 7 N/C 8-9 RC 10 N/C 11 PWR GND 12 GND 13 N/C 14 OUT 15 N/C 16 VCC 17 N/C 18-19 REF 20 UCC1800/1/2/3/4/5 UCC2800/1/2/3/4/5 UCC3800/1/2/3/4/5 ELECTRICAL CHARACTERISTICSUnless otherwise stated, these specifications apply for -55C TA +125C for UCC180x; -40C TA +85C for UCC280x; 0C TA +70C for UCC380x; VCC=10V (Note 3); RT=100k from REF to RC; CT=330pF from RC to GND; 0.1 F capacitor from VCC to GND; 0.1 F capacitor from VREF to GND. TA=TJ. PARAMETER TEST CONDITIONS UCC180X UCC280X MIN TYP UCC380X MAX MIN UNITS TYP MAX TJ=+25C, I=0.2mA, UCCx800/1/2/4 4.925 5.00 5.075 4.925 5.00 5.075 TJ=+25C, I=0.2mA, UCCx803/5 3.94 4.00 4.06 10 25 mV Reference Section Output Voltage 4.00 4.06 10 30 3.94 V Load Regulation 0.2mA