UNISONIC TECHNOLOGIES CO., LTD UD05201 Advance CMOS IC 1.2MHZ, 2A SYNCHRONOUS STEP-DOWN CONVERTER DESCRIPTION The UTC UD05201 is a 1.2MHz constant frequency current mode PWM step-down converter. It is ideal for portable equipment requiring very high current up to 2A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions. The UTC UD05201 also can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications. The UTC UD05201 can supply up to 2A output load current from a 2.6V to 5.5V input voltage and the output voltage can be regulated as low as 0.6V. The high switching frequency minimizes the size of external components while keeping switching losses low. The internal slope compensation setting allows the device to operate with smaller inductor values to optimize size and provide efficient operation. The UTC UD05201 is available in adjustable (0.6V to VIN) output voltage. SOP-8 FEATURES * 2.6V~5.5V Input Voltage Range * Output Voltages from 0.6V to VIN * High Efficiency: Up to 96% * 1.2MHz Constant Frequency Operation * Up to 2A Output Current * No Schottky Diode Required * Low RDS(ON) Internal Switches: 0.15Ω * Current Mode Operation for Excellent Line and Load Transient Response * Current limit, Enable function * Short Circuit Protect (SCP) * Build-in Soft Start function * ≤ 1µA Shutdown Current ORDERING INFORMATION Ordering Number UD05201G-S08-A-R UD05201G-S08-B-R UD05201G-S08-C-R UD05201G-S08-A-R Package SOP-8 SOP-8 SOP-8 (1)Packing Type (1) R: Tape Reel (2)Pin Code (2) Refer to PIN CONFIGURATION (3)Package Type (3) S08: SOP-8 (4)Green Package (4) G: Halogen Free and Lead Free www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Packing Tape Reel Tape Reel Tape Reel 1 of 5 QW-R115-003.a UD05201 Advance MARKING PIN CONFIGURATION PIN DESCRIPTION A PIN NO. B C 1 4 5 EN 2 3 4, 6 5 8 1 3, 5 2 8 1 3 4 PVIN SVIN SGND FB 7 7 7 LX 8 - 6 - 6 2 PGND NC PIN NAME DESCRIPTION Enable pin H: normal operation L: Shutdown Power Supply Input Pin Signal Supply Input Pin Signal Ground Pin Output Feedback pin Switch output pin. Connect external inductor here. Minimize trace area at this pin to reduce EMI. Power Ground Pin No connect pin UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CMOS IC 2 of 5 QW-R115-003.a UD05201 Advance CMOS IC BLOCK DIAGRAM OSC SVIN SLOPE COMP + Isense REF PVIN - AMP 0.6V SET Soft-Star + FB - ICOMP + RESET PWM LOGIC NONOVERLAP CONTROL LX + Izero - COMP SGND Over-Temperature and Short-Circuit Protection Enable Logic PGND EN UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R115-003.a UD05201 Advance CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT PVIN, SVIN Pin Voltage VIN VSS -0.3 to VSS+ 6 V Feedback Pin Voltage VFB VSS -0.3 to VIN+ 0.3 V EN Pin Voltage VEN VSS -0.3 to VIN+ 0.3 V Switch Pin Voltage VLX VSS -0.3 to VIN+ 0.3 V Power Dissipation PD mW Junction Temperature TJ +125 °C Operating Temperature Range TOPR -40~+85 °C Storage Temperature Range TSTG -40~+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. THERMAL RESISTANCES CHARACTERISTICS PARAMETER SYMBOL RATING Junction to Ambient θJA 120 Junction to Case θJC 40 2 Note: θJA is measured with the PCB copper area of approximately 1 in (Multi-layer). That need connect to Exposed pad of the UTC UD05201. UNIT °C/W °C/W LX pin or ELECTRICAL CHARACTERISTICS (VIN=VEN=3.6V, TA=25°C, unless otherwise specified) PARAMETER Supply Voltage Range SYMBOL VIN Feedback Voltage VFB Feedback Bias Current Quiescent Current Shutdown Supply Current Switching Current Limit Line Regulation Load Regulation Oscillation Frequency RDS(ON) of P-CH MOSFET RDS(ON) of N-CH MOSFET EN Pin Logic Input Threshold Voltage IFB ICCQ ISD EN Pin Input Current Efficiency Thermal Shutdown Thermal Shutdown Hysteresis TEST CONDITIONS TA=+25°C TA=0°C ≤TA≤85°C TA=-40°C ≤TA ≤85°C VFB=0.65V VFB=0.8V VEN=0V ILIMIT △VOUT / VOUT △VOUT / VOUT FOSC RDSON RDSON VENL VENH IEN EFFI TSD TSH VIN=2.6V~5.5V IOUT= 0.01~2A LX pin VFB=0V,IOUT=1A Guaranteed by design VIN=5V, VOUT=3.3V,IOUT=1.5A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX 2.6 5.5 0.5880 0.6000 0.6120 0.5865 0.6000 0.6135 0.5820 0.6000 0.6180 ±30 250 400 0.1 1 2.2 2.5 0.04 0.4 0.5 1 1 1.2 1.4 0.15 0.25 0.11 0.20 0.4 1.5 ±0.1 ±1 91 140 30 UNIT V V V V nA uA uA A %/V % MHz Ω Ω V uA % °C °C 4 of 5 QW-R115-003.a UD05201 Advance CMOS IC FUNCTION DESCRIPTIONS Operation UTC UD05201A/B/C is a monolithic switching mode Step-Down DC-DC converter. It utilizes internal MOSFETs to achieve high efficiency and can generate very low output voltage by using internal reference at 0.6V. It operates at a fixed switching frequency, and uses the slope compensated current mode architecture. This Step-Down DC-DC Converter supplies 2000mA output current at input voltage range from 2.6V to 5.5V. Current Mode PWM Control Slope compensated current mode PWM control provides stable switching and cycle-by-cycle current limit for excellent load and line responses and protection of the internal main switch (P-CH MOSFET) and synchronous rectifier (N-CH MOSFET). During normal operation, the internal P-CH MOSFET is turned on for a certain time to ramp the inductor current at each rising edge of the internal oscillator, and switched off when the peak inductor current is above the error voltage. The current comparator, ICOMP limits the peak inductor current. When the main switch is off, the synchronous rectifier will be turned on immediately and stay on until either the inductor current starts to reverse, as indicated by the current reversal comparator, IZERO, or the beginning of the next clock cycle. TYPICAL APPLICATION 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 5 of 5 QW-R115-003.a