UNISONIC TECHNOLOGIES CO., LTD US222 Preliminary LINEAR INTEGRATED CIRCUIT 0.5A TO 2.0A HIGH-SIDE POWER DISTRIBUTION SWITCHES DESCRIPTION The UTC US222 are low voltage cost-effective high-side power switches with flag function. These devices are particularly suitable for self-powered and bus-powered USB applications. The build-in N-MOSFET’s RDS(ON) which meets the requirements of USB voltage drop is as low as 85 mΩ. The UTC US222 contains a charge pump circuitry to drive the internal MOSFET switch and also incorporate such protection circuits: soft-start circuit protect these devices from being damaged by limiting inrush current during plug-in; thermal shutdown circuit is used to prevent catastrophic switch failure from high-current loads. UVLO is used to ensure that the device remains off unless there is a valid input voltage present. A flag output is designed to indicate fault conditions to the local USB controller. FEATURES * Low MOSFET On Resistance: 85mΩ * Compliant to USB Specifications * Available 4 Versions of Continuous Load: 0.5A/1.0A/1.5A/2.0A * Logic Level Enable Pin: Available with Active-high or Active-low Version * Low Supply Current: 68µA (Typ.) * Low Shutdown Current: 1.0µA (Max) * Soft Start-up * Under-voltage Lockout * Over-current Protection * Over Temperature Protection * Load Short Protection with Fold-back * Deglitched FLAG Output with Open Drain * No Reverse Current When Power Off * With Output Shutdown Pull-low Resistor ORDERING INFORMATION Ordering Number US222XXG-AF5-R Package SOT-25 Packing Tape Reel US222XXG-AF5-R (1)Packing Type (1) R: Tape Reel (2)Package Type (2) AF5: SOT-25 (3)Green Package (3) G: Halogen Free and Lead Free (4)Current Limit (4) AL/AH: 2.0A, BL/BH: 1.5A, CL/CH: 1.0A, DL/DH: 0.5A www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 4 QW-R129-012.a US222 Preliminary MARKING PIN CONFIGURATION VIN EN 4 5 2 1 VOUT 3 GND FLAG PIN DESCRIPTION PIN NO. 1 2 PIN NAME VOUT GND 3 FLAG 4 5 EN VIN LINEAR INTEGRATED CIRCUIT DESCRIPTION Switch output voltage Ground Fault flag pin, output with open drain, need a pull-up resistor in application, active low to indicate OCP or OTP Chip enable control input, active low or high Supply input pin BLOCK DIAGRAM VIN Current Limiting UVLO EN Gate Control Bias Oscillator Thermal Protection Charge Pump Output Voltage Detection Delay VOUT FLAG GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R129-012.a US222 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Power Supply Voltage VIN 6.0 V Operating Junction Temperature Range TJ 150 °C Storage Temperature Range TSTG -65~+150 °C Lead Temperature (Soldering, 10sec) TLEAD 260 °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. RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Operating Ambient Temperature Range MIN TYP -40 MAX 5.5 85 UNIT V °C THERMAL DATA PARAMETER Junction to Ambient SYMBOL VIN TA SYMBOL θJA RATINGS 300 UNIT ℃/W ELECTRICAL CHARACTERISTICS (VIN=5.0V, CIN=2.2µF, COUT=1.0µF, Typical TA=25°C, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS Supply Voltage VIN Switch On Resistance RDS(ON) VIN=5.0V, IOUT=0.5A Supply Current ISUPPLY VIN=5.0V, No Load US222AL/AH (2.0A), VOUT=4.0V US222BL/BH (1.5A), VOUT=4.0V Current Limit ILIMIT US222CL/CH (1.0A), VOUT=4.0V US222DL/DH (0.5A) , VOUT=4.0V Fold-back Short Current ISHORT US222A/B/C/D, VOUT=0V Shutdown Supply Current ISHUTDOWN Chip Disable, Shutdown Mode Enable High Input Threshold VENH Enable Low Input Threshold VENL Enable Pin Input Current IEN Force 0V to 5.0V at EN Pin Under Voltage Lockout VUVLO VIN Increasing from 0V Threshold Voltage Under Voltage Hysteresis VUVLOHY Output Pull Low Resistance RDISCHARGE after Shutdown From Enable Active to 90% of Output Turn-on Time tON Output From Over Current Fault FLAG Pin Delay Time tDFLG Condition to Flag Active FLAG Pin Low Voltage VFLG ISINK=1.0mA FLAG Pin Leakage Current ILEAKAGE FLAG Disable, Force 5.0V Thermal Shutdown Temperature TOTSD Thermal Shutdown Hysteresis THYOTSD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 2.1 1.6 1.1 0.6 85 68 2.7 2.0 1.5 1.0 1.0 0.1 MAX 5.5 110 95 3.6 2.8 2.1 1.4 5.0 2.0 0.8 1.0 -1.0 UNIT V mΩ µA A A A A A µA V V µA 2.5 V 0.2 V 100 Ω 400 µs 12 ms 35 1.0 150 30 mV µA °C °C 3 of 4 QW-R129-012.a US222 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT R 10kΩ VIN=5V 5 CIN (Note 1) 2.2µF 3 USB Controller UTC US222 4 Enable FLAG VIN EN GND 2 VOUT 1 COUT 1µF VBUS D+ DGND Note: 2.2µF input capacitor is enough in most application cases. If the VOUT is short to ground frequently during usage, large size input capacitor is necessary, recommend 22µF. 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 4 of 4 QW-R129-012.a