UTC UR3325 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. 1 TO-252-5 1: Vcc 2: NC 3: GND 4: Vo1 5: VO2 PIN DISCRIPTION PIN NO. PIN NAME 1 2 3 4 5 Vcc N.C. GND Vo1 Vo2 UTC FUNCTION Power Supply Not internally connected Ground 3.3V Output 2.5V Output UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R102-017,C UTC UR3325 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 UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R102-017,C UTC UR3325 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER SYMBOL Supply Voltage Vcc Power dissipation PD Operating temperature range Topr Storage temperature range Tstg Junction temperature Tj * PD derated at 8mW/℃ for temperatures above Ta=25℃ RATINGS UNIT 18 1000* -40 ~ +85 -55 ~ +150 150 V mW °C °C °C OPERATING RATINGS(Ta=25℃) PARAMETER SYMBOL MIN MAX UNIT Vcc Io1 Io2 3.0 16.0 1 1 V A A Input Voltage 3.3V Output current 2.5V Output current ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Ta=25℃, VCC=5V unless otherwise specified.) PARAMETER Bias Current 3.3V Output Output Voltage 1 Dropout Voltage 1 Peak Output Current 1 Ripple Rejection 1 Line Regulation 1 SYMBOL IB Vo1 △VD1 TEST CONDITIONS Io1=500mA Io1=500mA, Vcc=3.135V Io1 R.R.1 △VLINE1 △VLOAD1 Load Regulation 1 Temperature Coefficient of Output TCVO1 Voltage 1* Short circuit Output Current 1 IOS1 2.5V Output Output Voltage 2 Vo2 Peak Output Current 2 Io2 Ripple Rejection 2 R.R.2 MIN TYP MAX UNIT 0.8 1.5 mA 3.366 0.5 1.0 3.30 0.25 1.7 V V A 50 58 Io1=0mA, Io2=0mA f=120Hz, ein=1Vrms Io1=200mA Vcc=4V ~ 16V, Io1=500mA 3.234 Io1=0mA ~ 1A Io1=5mA, TJ=0 ~ 125℃ Vcc=16V Io2=500mA f=120Hz, ein=1Vrms Io2=200mA Vcc=4V ~ 16V, Io2=500mA Io2=0mA ~ 1A Io2=5mA, TJ=0 ~ 125℃ △VLINE2 Line Regulation 2 △VLOAD2 Load Regulation 2 Temperature Coefficient of Output TCVO2 Voltage 2* Short circuit Output Current 2 IOS2 Vcc=16V * Design Guarantee. (Outgoing inspection is not done on all products.) ○ This product is not designed for protection against radioactive rays. dB 5 30 mV 30 75 mV ±0.01 %/℃ 270 mA 2.450 1.0 2.50 1.7 50 58 5 30 2.550 V A dB 30 75 mV mV ±0.01 %/℃ 270 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. UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R102-017,C UTC UR3325 LINEAR INTEGRATED CIRCUIT POWER DISSIPATION, P D (W) POWER DISSIPATION 12.5 (1) 10.0 10 (1) With infinitc Aluminum heat sink θj-c=12.5 (℃/W) (2) With no heat sink θj-a=125.0(℃/W) 7.5 5 2.5 0 (2) 1.0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE, T a (℃) STANDARD APPLICATION CIRCUIT Vo1 + 22μF Vcc GND Vo2 22μF + 1Ω 10μF Ceramic 1Ω OR OR 10μF Ceramic TEST CIRCUIT FOR EACH CONDITION V Vcc GND 0.33μF UTC A Vo1 or Vo2 22μF + A Io UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R102-017,C UTC UR3325 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT FOR RIPPLE REJECTION RATIO Vcc GND ein 0.33μF VIN Vo1 or Vo2 22μF + V Io 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, homever, the variation will be small. ● Input /Output characteristic VOUT Dropout Region Regulation Region Vin Off Region 2V 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 Fig.3. 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 UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R102-017,C UTC UR3325 LINEAR INTEGRATED CIRCUIT 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. 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. UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R102-017,C