UNISONIC TECHNOLOGIES CO., LTD UR13325 LINEAR INTEGRATED CIRCUIT 2 CHANNEL LOW-DROPOUT VOLTAGE REGULATOR FEATURES * Dual output: 3.3V/1A, 2.5V/1A. * Output voltage precision of ±2%. * Output consists of PNP power transistor with low-dropout voltage. * Built-in over current protection circuit (OCP). * Built-in thermal shut down circuit (TSD). * Ideal for hard disk drives applications. *Pb-free plating product number: UR13325L ORDERING INFORMATION Ordering Number Normal Lead Free Plating UR13325-TN5-R UR13325L-TN5-R UR13325-TN5-T UR13325L-TN5-T Package Packing TO-252-5 TO-252-5 Tape Reel Tube UR13325L-TN5-R (1)Packing Type (2)Package Type (3)Lead Plating www.unisonic.com.tw Copyright © 2008 Unisonic Technologies Co., Ltd (1) R: Tape Reel, T: Tube (2) TN5: TO-252-5 (3) L: Lead Free Plating, Blank: Pb/Sn 1 of 8 QW-R102-030.C UR13325 LINEAR INTEGRATED CIRCUIT PIN DISCRIPTION PIN NO. 1 2 3 4 5 PIN NAME VCC N.C. GND Vo1 Vo2 FUNCTION Power Supply Not internally connected Ground 3.3V Output 2.5V Output UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R102-030.C UR13325 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM Vcc PIN 1 Vcc Reference Voltage Vcc + Vo1 Current Limit PIN 4 Sat. Prevention Vcc Vcc + Vo2 Thermal Shut Down Current Limit PIN 5 Sat. Prevention NC PIN 2 PIN 3 GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 8 QW-R102-030.C UR13325 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER RATINGS UNIT 18 V 1000 mW PD 8 mW/°C Junction Temperature TJ +150 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -55 ~ +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. Supply Voltage Power Dissipation Derating above 25°C RECOMMENDED OPERATING RATINGS (Ta=25℃) PARAMETER Input Voltage 3.3V Output current 2.5V Output current SYMBOL VCC SYMBOL VCC Io1 Io2 MIN 3.0 MAX 16.0 1 1 UNIT V A A ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Ta=25℃, VCC=5V unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Bias Current IBIAS Io1=0mA, Io2=0mA 2.0 2.3 mA 3.3V Output Output Voltage 1 Vo1 Io1=500mA 3.234 3.30 3.366 V Dropout Voltage 1 △VD1 Io1=500mA, VCC =3.135V 0.25 0.5 V Peak Output Current 1 Io1 1.0 1.7 A f=120Hz, ein=1Vrms 50 58 dB Ripple Rejection 1 R.R.1 Io1=200mA Line Regulation 1 △VLINE1 VCC =4V ~ 16V, Io1=500mA 5 30 mV Load Regulation 1 △VLOAD1 Io1=0mA ~ 1A 30 75 mV Temperature Coefficient of Output TCVO1 Io1=5mA, TJ=0 ~ 125℃ ±0.01 %/℃ Voltage 1 Short Circuit Output Current 1 IOS1 VCC =16V 600 mA 2.5V Output Output Voltage 2 Vo2 Io2=500mA 2.450 2.50 2.550 V Peak Output Current 2 Io2 1.0 1.7 A f=120Hz, ein=1Vrms 50 58 dB Ripple Rejection 2 R.R.2 Io2=200mA Line Regulation 2 △VLINE2 VCC =4V ~ 16V, Io2=500mA 5 30 mV Load Regulation 2 △VLOAD2 Io2=0mA ~ 1A 30 75 mV Temperature Coefficient of Output TCVO2 Io2=5mA, TJ=0 ~ 125℃ ±0.01 %/℃ Voltage 2 Short Circuit Output Current 2 IOS2 VCC =16V 450 mA Note: All characteristic are measured with a capacity across the input (0.33μF) and the output (22μF). Measurement is done at TA≒TJ, and variations in the parameter of all measurement (except for Temperature Coefficient of Output Voltage) caused by temperature change are not considered. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 8 QW-R102-030.C UR13325 POWER DISSIPATION 12.5 Power Dissipation, PD (W) LINEAR INTEGRATED CIRCUIT (1) 10.0 10 (1) With infinitc Aluminum heat sink θjc=12.5 (℃/W) (2) With no heat sink θja=125.0(℃/W) 7.5 5 2.5 0 (2) 1.0 0 25 50 75 100 125 150 Ambient Temperature, Ta (℃) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 8 QW-R102-030.C UR13325 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT TEST CIRCUIT FOR EACH CONDITION FOR RIPPLE REJECTION RATIO Vcc GND ein VIN 0.33µ F UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Vo1 or Vo2 22µ F + V Io 6 of 8 QW-R102-030.C UR13325 LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION Operation Supply Voltage Range The circuit functionality is guaranteed within operation of ambient temperature range, as long as it is within operation supply voltage range. The standard electrical characteristic values are guaranteed at the test circuit voltage of Vcc=5V. The cannot be guaranteed at other voltages in the operating range of 3.0V~16.0V, however, the variation will be small. ● Input /Output characteristic VOUT Dropout Region Vin Off Region 2V Regulation Region Recommended Operating Region 3V (Typ.TA=25℃) For proper regulation, this device must be operated in the Recommended Operating Region shown above. Power Dissipation Refer to the thermal duration characteristics shown in page 4. Also, be sure to use this IC within a power dissipation rage allowing enough margins. Output and Bypass Capacitor To prevent oscillations, place the output capacitor between the output pin and GND for both channel. There is a possibility for oscillation if capacitor's value changes due to temperature, voltage, etc. More than 22μF electrolytic capacitor is recommended. If an extremely large value of (over 1000μF) is used, it may cause oscillations at low frequency. In case of using ceramic capacitor (it is recommended more than 10μF) connect with 1Ω resistance serially as ESR. For the bypass capacitor, a 0.33μF capacitor placed as close to Vcc pin and GND pin as possible is recommended. Over- current Protection Circuit The over-current protection circuits are built in at the outputs. They protect the IC from being damaged when the load is short-circuited or subjected to an over current condition. This protection circuits perform holdback current limiting. Thermal Protection Circuit A thermal shut down circuit (T.S.D.) is built into the IC to prevent damage due to overheating, Therefore, all the outputs are turned off when the T.S.D. circuit is activated and are turned on when the temperature recedes to the specified level. However, the T.S.D. circuit is only for extreme conditions and the regulator circuit should still be designed for the IC not to exceed TJ(max)=150℃. Grounding It is recommended that every capacitor (bypass and output capacitors) is grounded to PIN3 using single-point connections. Electromagnetic Fields The IC is susceptible to strong electromagnetic fields and may cause malfunction. Therefore, caution should be used when placing it on the PCB. Protection Diodes It is recommended that protection diodes be used when the output is connected to an inductive load. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 8 QW-R102-030.C UR13325 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 8 of 8 QW-R102-030.C