UC2306-XX-S08-R

UNISONIC TECHNOLOGIES CO., LTD UC2306 MICROPOWER DC/DC CONVERTERS WITH LOW-BATTERY DETECTOR ACTIVE IN SHUTDOWN DESCRIPTION The UTC UC2306 is a step-up DC/DC converter which operate from a wide input supply range of 1.5V to 8V. Its peak switch current can be reduced by adding a single resistor at the ILIM pin. It is an ideal for use in small, low voltage, battery-operated systems. LINEAR INTEGRATED CIRCUIT SOP-8 DIP-8 FEATURES *In shutdown mode:10μA quiescent current. *Low battery detector active *Minimum Operating Voltage: 1.5V *Very Low VCESAT: 370mV@1A (typ). *In active mode :120μA quiescent current. *Only by one resistor: peak current is programmable. *Pb-free plating product number: UC2306L ORDERING INFORMATION Ordering Number Normal UC2306-xx-D08-T UC2306-xx-S08-R UC2306-xx-S08-T Lead Free Plating UC2306L-xx-D08-T UC2306L-xx-S08-R UC2306L-xx-S08-T Package DIP-8 SOP-8 SOP-8 Packing Tube Tape Reel Tube www.unisonic.com.tw Copyright © 2008 Unisonic Technologies Co., Ltd 1 of 12 QW-R103-029,B UC2306 PIN CONFIGURATION LBI 1 LBO VIN SW 2 3 4 8 7 6 5 LINEAR INTEGRATED CIRCUIT FB(SENSE) SHDN ILIM GND PIN DESCRIPTION PIN No. 1 2 3 4 5 6 7 8 SYMBOL LBI LBO VIN SW GND ILIM SHDN FB/SENSE DESCRIPTION Input of Low Battery Detector. Detector output is low when voltage on this pin is less than 1.17V. Output of Low Battery Detector. Input Voltage Supply. The Collector Pin of Power NPN. Ground. Pin For Current Limit Set. Connected to nothing for 1A peak switch current; and connect to a resistor to ground will lower peak current Input of Shutdown.Held low, then switching regulator is turned off. This Pin should not be float. When SHDN mode is not used, connect it to VIN This pin connects to the resistor divider. In shutdown mode,the divider is disconnected from it. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 12 QW-R103-029,B UC2306 BLOCK DIAGRAMS LINEAR INTEGRATED CIRCUIT R3 FB 8 R4 A1 + 1.24V VREF ENABLE TIMERS 6μs ON 1.5μs OFF DRIVER 36mV + 1.5V UNDER VOLTAGE LOCKOUT VIN 3 VIN C1 + 2 LBO A2 R2 1K R1 7.2Ω SW 4 L1 1 LBI + 1.17V BIAS -1V Q3 + SHUTDOWN 7 SHDN 6 1K ILIM 5 GND VOUT C2 A3 Q2 ×1 Q1 ×200 D1 UC2306 Block Diagram. Note：A3 Remains Alive When Device Is in Shutdown UC2306-3.3/UC2306-5.0 Block Diagram UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 12 QW-R103-029,B UC2306 ABSOLUTE MAXIMUM RATINGS LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATING UNIT Input Voltage VIN 8 V SW Voltage VSW -0.4 ~ +25 V FB Voltage(UC2306) VFB VIN+0.3 V ILIM Voltage(UC2306-3.3/UC2306-5.0) VILIM 5 V SHDN Voltage VSHDN 6 V LBI Voltage VLBI VIN V LBO Voltage VLBO 8 V Maximum Power Dissipation PD 500 mW Junction Temperature TJ 125 °C Operating Temperature TOPR -20 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C 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 (VIN=2V, VSHDN=2V, unless otherwise specified) PARAMETER Minimum Operating Voltage Operating Voltage Quiescent Current Quiescent Current In Shutdown Comparator Trip Point FB Pin Bias Current Sense Pin Leakage in Shutdown Line Regulation LBI Input Threshold LBI Bias Current LBI Input Hysteresis LBO Output Voltage Low LBO Output Leakage Current SHDN Input Voltage SHDN Pin Bias Current Switching Off Time Switch On Time Maximum Duty Cycle High Low SYMBOL VCC(MIN) VIN V SHDN IQ V SHDN ISD V SHDN IFB ILEAK(SD) ΔVOUT VLBI(THR) ILBI (BIAS) ILBI (HYS) VLBO(OL) ILBO(LEAK) V SHDN TEST CONDITIONS MIN TYP 1.5 120 7 27 1.24 10 0.002 =2V, Not switching(Note) =0V, VIN=2V(Note) =0V, VIN=5V(Note) 1.22 I SHDN tOFF tON tDUTY (Note) (Note) V SHDN =0V, Fixed Output Versions(Note) 1.8V≤VIN≤8V (Note) Falling Edge(Note) (Note) (Note) ISINK=500µA(Note) LBI=1.5V, LBO=5V(Note) (Note) (Note) V SHDN =5V(Note) V SHDN =0V(Note) MAX 1.65 8 200 15 50 1.26 25 1 0.15 1.25 20 65 0.4 0.1 0.4 8 2 8 88 1.2 UNIT V V µA µA µA V nA µA %/V V nA mV V µA V V µA µA µs µs % A mA V V µA 1.10 0.04 1.17 6 35 0.2 0.01 1.4 5 -2 1.5 6 80 1 500 0.37 0.26 0.01 (Note) Current Limit Not Asserted (Note) Current Limit Not Asserted (Note) ILIM Pin Open, VIN=5V Peak Switch Current I (SW) 20K from ILIM to GND Isw=1A Switch Saturation Voltage VSW(SAT) Isw=700mA(Note) Switch Leakage ILEAK(SW) Switch off, Vsw=5V Note: Denotes specifications which apply over the 0°C to 70°C operating temperature range. -5 1 4 76 0.8 0.35 7 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 12 QW-R103-029,B UC2306 TYPICAL APPLICATION LINEAR INTEGRATED CIRCUIT Super Burst Low IQ DC/DC Converter IQ ≈ 10μA 33 μ H MBRS130L 5V 100mA 0.01μF 200K + 2 CELLS 100 μF 47K V IN LBO UC2306 FB SHDN 2N3906 I IM L GND 22K 47K 1.21M (1%metal film) + 220 μ F SW LBI 3.83M (1%metal film) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 12 QW-R103-029,B UC2306 TYPICAL APPLICATION(Cont.) LINEAR INTEGRATED CIRCUIT 3.3V SEPIC Efficiency(Step-Up/Step-Down Converter) L1A V IN 2.5V to 8V + C2 47 μ F 16V SHUTDOWN 2 1 C1 1 μF MBRS130L 4 L1B* 3 3.3V 300mA + C3 100μF 10V V IN SW UC2306-3.3 SHDN SENSE GND I LIM NC 5V SEPIC (Step-Up/Step-Down Converter) L1A V IN 3V to 8V + 47 μ F 16V SHUTDOWN 2 1 C1 1 μF MBRS130L 4 L1B 3 5V 200mA + 100μF 10V V IN SW UC2306-5.0 SHDN SENSE GND I LIM NC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 12 QW-R103-029,B UC2306 TYPICAL APPLICATION(Cont.) LINEAR INTEGRATED CIRCUIT Single Li-lon Cell to 5V Converter with Load Disconnect at VIN＜2.7V 22μH 5V + 100μF SINGLE LI-ION CELL 432k 1% 562k 1% 220k NC MBRS130L V IN ILIM SW SENSE VOUT VIN1 VINS SHDN GND LBO + EN 100μF 10V VOUT VIN2 VIN3 GND + 1 μF NC NC LBI UC2306-5.0 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 12 QW-R103-029,B UC2306 TYPICAL APPLICATION(Cont.) LINEAR INTEGRATED CIRCUIT 2- TO 4- Cell to 5V Converter with Output Disconnect 2K L1 22μH ZTX788B MBRS130L 5V 100mA VIN 2V to 6V VIN + 47μF SHUTDOWN SW SENSE UC2306-5.0 SHDN ILIM GND + 22μF + 220μF NC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 12 QW-R103-029,B UC2306 TYPICAL APPLICATION(Cont.) LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 12 QW-R103-029,B UC2306 TYPICAL CHARACTERISTICS Super Burst Efficiency 90 80 Efficiency (%) LINEAR INTEGRATED CIRCUIT VIN=3V 70 VIN=2V 60 50 40 0.01 0.1 1.0 10 100 Load Current (m) 5V to 12V Converter Efficiency 90 85 Efficiency (%) 80 75 70 65 1 10 100 Load Current(mA) 300 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 12 QW-R103-029,B UC2306 TYPICAL CHARACTERISTICS(Cont.) Switch Saturation Voltage 500 Ta =25℃ Saturation Voltage (mV) LINEAR INTEGRATED CIRCUIT Peak Switch Current Limit 1.3 1.2 400 1.1 300 200 100 0 0 0.2 0.4 0.6 0.8 Switch Current (A) On-and Off-times 8 7 6 Maximum OnTime Feedback Voltage (V) 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 -25 0 25 50 Temperature(℃) 75 100 1.200 -50 -25 0 25 50 75 100 1.0 1.2 Peak Current (A) 1.0 0.9 0.8 0.7 0.6 -50 -25 0 25 50 Temperature(℃) Feedback Voltage 75 100 Time (μs) 5 4 3 2 1 0 -50 Off-Time Temperature(℃) 300 Ta =25℃ 250 Supply Current 20 18 16 14 Bias Current (nA) 12 10 8 6 4 2 0 -50 Feedback Pin Bias Current Supply Current (us) 200 150 100 50 VSHDN=VN NOT SWITCHING VSHDN= 0 V -25 0 25 50 75 100 0 0 1 2 3 4 5 6 7 8 Temperature(℃) Input Voltage (V) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 12 QW-R103-029,B UC2306 LINEAR INTEGRATED CIRCUIT 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 www.unisonic.com.tw 12 of 12 QW-R103-029,B