UNISONIC TECHNOLOGIES CO., LTD

Transcription

1 UNISONIC TECHNOLOGIES CO., LTD 50KHZ, A PWM STEP-DOWN DC/DC CONVERTER DESCRIPTION The UTC P596 series is a step-down switching regulator able to provide A output current. The available output voltages are.5v, 2.5V,.V, 5V, 2V, and an adjustable output version. FEATURES TO-220B TO *Output load current: A *Adjustable version output voltage range,.2v ~ 7V±4% *Operating voltage can be up to 40V (V IN ->40V) *Low power standby mode *High efficiency *Internal current and thermal limit TO-26-5 TO ORDERING INFORMATION *Pb-free plating product number:p596l Order Number Normal Lead Free Plating Package Packing P596-xx-TA5-T P596L-xx-TA5-T TO Tube P596-xx-TB5-T P596L-xx-TB5-T TO-220B Tube P596-xx-TN5-R P596L-xx-TN5-R TO Tape Reel P596-xx-TN5-T P596L-xx-TN5-T TO Tube P596-xx-TQ5-R P596L-xx-TQ5-R TO-26-5 Tape Reel P596-xx-TQ5-T P596L-xx-TQ5-T TO-26-5 Tube Note: xx: Output Voltage, refer to Marking Information. P596L-xx-TA5-T ()Packing Type (2)Package Type ()Output Voltage Code (4)Lead Plating () R: Tape Reel, T: Tube (2) TA5: TO-220-5, TB5: TO-220B, TN5: TO-252-5, TQ 5: TO-26-5 () xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn of 8 Copyright 2005 Unisonic Technologies Co., Ltd QW-R0-02,C

2 PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION V IN Operating voltage input 2 Output Switching output GND Circuit Ground 4 FB (Feedback) Output voltage feedback control 5 SD (Shutdown) ON/OFF shutdown MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING TO TO-220B TO TO :.5V 25:2.5V UTC :.V P596 50:5.0V Voltage Code 2:2V AD:ADJ Lead Plating Date Code THERMAL DATA Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient PARAMETER SYMBOL RATINGS UNIT TO-220B TO TO-26-5 TO TO-220B TO TO-26-5 TO θ JC θ JA /W /W UNISONIC TECHNOLOGIES CO., LTD 2 of 8 QW-R0-02,C

3 BLOCK DIAGRAM ON / OFF VIN Current Source bias.25v Reference 2.5V Regulator Start up Comp - - Comp FB Amp - Frequency Compensation - Comp Pre-driver A Switch 50kHz OSC. Thermal Shutdown Output Gnd UNISONIC TECHNOLOGIES CO., LTD of 8 QW-R0-02,C

4 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage V CC 45 V Operating Voltage V OPR 4.5 ~ 40 V ON/OFF Pin Input Voltage V ON/OFF -0. ~ 25 V Feedback Pin Voltage VFB -0. ~ 25 V Output Voltage to Ground (Steady State) VOUT - V Power Dissipation PD Internally limited mw Maximum Junction Temperature T J 50 Temperature Range TOPR -40 ~ 25 Storage Temperature Range TSTG -65 ~ 50 Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (TJ=25, V IN =2V for the.v, 5V, and Adjustable version and V IN =24V for the 2V version, I LOAD =500mA.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT.5V 2.8V VIN 40V, 0.2A ILOAD A V 2.5V.8V VIN 40V, 0.2A ILOAD A V Output Voltage.V VOUT 4.75V VIN 40V, 0.2A ILOAD A V 5.0V 7V VIN 40V, 0.2A ILOAD A V 2V 5V VIN 40V, 0.2A ILOAD A V.5V VIN=2V, ILOAD=A 7 % 2.5V VIN=2V, ILOAD=A 7 % Efficiency.V η VIN=2V, ILOAD=A 7 % 5.0V VIN=2V, ILOAD=A 80 % 2V VIN=25V, ILOAD=A 90 % UTC P596-ADJ Feedback Voltage V FB 4.5V V IN 40V, 0.2A I LOAD A V OUT programmed for V V Efficiency η V IN =2V, V OUT =V, I LOAD =A 7 % ALL OUTPUT VOLTAGE Feedback Bias Current I BIAS Adjustable Version Only, V FB =.V 0 50 na Oscillator Frequency f OSC (Note ) khz Saturation Voltage V SAT I OUT =A (Note 2, ).6.4 V Duty Cycle Min ON (Note ) 00 DC Max OFF(Note 4) 0 % Current Limit I LIMIT Peak Current (Notes 2, ) A Output Leakage Current I LEAK Output=0V (Notes 2, 4) 50 µa Output=-V, V IN = 40V 2 0 ma Quiescent Current IQ (Note 4) 5 0 ma Standby Quiescent Current ISTBY ON/OFF pin=5v (OFF), V IN = 40V μa ON/OFF CONTROL ON/OFF Pin Logic Input Low VIH Regulator ON 0.6. Threshold Voltage High VIL Regulator OFF 2.0 V ON/OFF Pin Input Current IH VLOGIC=2.5V (Regulator OFF) 5 5 μa IL VLOGIC=0.5V (Regulator ON) 2 5 μa Note:.The switching frequency is reduced when the second stage current limit is activated. 2.No diode, inductor or capacitor connected to output pin..feedback pin removed from output and connected to 0V to force the output transistor switch ON. 4.Feedback pin removed from output and connected to 5V for the 2V version, and 2V for others to force the output transistor switch OFF. UNISONIC TECHNOLOGIES CO., LTD 4 of 8 QW-R0-02,C

5 TYPICAL APPLICATION For Fixed Versions 2V DC Input Cin Capacitor Vin FB 4 UTC 2 P V 5 on / off Gnd Output L Inductor D Schottky Diode Co Capacitor 5.0V/A Output Load Note: The DC input would be 5V for 2V version. For Adjustable Version R k CFF R2 4 FB VIN UTC P596- ADJ UNREGULATED DC INPUT GND 5 CIN LOCATE THE PROGRAMMING RESISTORS NEAR THE FEEDBACK PIN USING SHORT LEADS 2 ON/OFF OUTPUT D L KEEP FEEDBACK WIRING AWAY FROM INDUCTOR FLUX REGULATED OUTPUT L O COUT A D HEAVY LINES MUST BE KEPT SHORT AND USE GROUND PLANE CONSTRUCTION FOR BEST RESULTS VOUT ( R ) = VREF R R2 R2 VOUT = VREF ( R ) Where V REF =.2V R2 = R( VOUT VREF -) UNISONIC TECHNOLOGIES CO., LTD 5 of 8 QW-R0-02,C

6 TYPICAL CHARACTERISTICS Normalized Output Voltage Line Regulation V IN =20V, I LOAD =A Normali ed at T J= Vout=5V, I LOAD=00mA Normalized at T J =25 Output Voltage (V) Output Voltage (V) Input Voltage (V) Efficiency Switch Saturation Voltage Efficiency (%) A Load 5.0V.V Saturation Voltage (V) : : 25 : Input Voltage (V) Switch Current(A) Switch Current Limit V IN =2V, V OUT =5V 25.0 Operating Quiescent Current 4.5V< V IN < 40V I SWITCH =0 Switch Current Limit (A) Supply Current (ma) Switch ON Switch OFF UNISONIC TECHNOLOGIES CO., LTD 6 of 8 QW-R0-02,C

7 TYPICAL CHARACTERISTICS (Cont.) Shutdown Quiescent Current Minimum Operating Supply Voltage V ON/OFF =5V : : 25 : VOUT=.2V I LOAD =200mA Current (ua) Supply Voltage (V) Supply Voltage (V) ON/OFF Threshold Voltage ON/OFF Pin Current (Sinking) V IN =40V -40 < T J <25 Threshold Voltage (V) OFF Current (ua) ON ON/OFF Pin Voltage (V) 00 Switch Frequency 60 Feedback Pin Bias Current 250 V IN =20V, I LOAD =A Normalized at T J =25 50 Frequency (khz) Bias Current (na) Adjustable Version Only UNISONIC TECHNOLOGIES CO., LTD 7 of 8 QW-R0-02,C

8 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD 8 of 8 QW-R0-02,C