UNISONIC TECHNOLOGIES CO., LTD U8021 Preliminary CMOS IC VOLTAGE MODE PWM CONTROLLER WITH LINEAR POWER REGULATOR DESCRIPTION The UTC U8021 provides the control and protection features necessary for a synchronous buck converter and a linear regulator in high performance graphic card applications. The UTC U8021 is designed to directly drive the high and low MOSFETs of the buck converter. It allows the converter to operate with 4V~25V power rail and as low as 0.5V output. The UTC U8021 is capable to drive a N-type MOSFET in a linear regulator with as low as 0.5V output. The UTC U8021 features soft-start, UVLO, and OCP. The UTC U8021 monitors the output current by using the Rdson of the low MOSFET in the buck converter that eliminates the need for a current sensing resistor. FEATURES * 4V~25V power rails * Internal LDO * 1.5A gate drive current * Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs * Programmable output voltages * Internal soft start * Under voltage lockout * Short circuit protection ORDERING INFORMATION Ordering Number Lead Free U8021L-S14-T U8021L-S14-R Halogen Free U8021G-S14-T U8021G-S14-R www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd Package Packing SOP-14 SOP-14 Tube Tape Reel 1 of 6 QW-R502-A13.a U8021 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN NAME BST OCS COMP FB LDOG LDFB GND VCC NC DRV DL GND PN DH CMOS IC DESCRIPTION Boost input for top gate drive bias. Current limit setting. Compensation PIN. Feedback voltage External LDO gate drive. External LDO feedback voltage. Ground. Power supply. No Bonding. Internal LDO output. Gate drive for low MOSFET. Ground. Phase PIN. Gate drive for high MOSFET. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-A13.a U8021 CMOS IC BLOCK DIAGRAM VCC BIAS OSC LDO BST PWM DH COMP FB EA S DRIVER R LATCH Preliminary DRV DL VCC Bandgop UVLO Soft Sart LDO-REG OCP GND LDOG PN LDFB OCS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R502-A13.a U8021 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. PARAMETER SYMBOL RATINGS UNIT Input Supply Voltage VCC 18 V BST to GND VBST 40 V BST to PN VBST_PN 10 V PN to GND VPN -1~30 V PN to GND Negative Pulse (tpulse<20ns) VPN_PULSE -5 V DL to GND VDL -1~+10 V DL to GND Negative Pulse (t pulse<20ns) VDL_PULSE -3 V DH to PN VDH_PN -1~+10 V DH to PN Negative Pulse (tpulse<20ns) VDH_PULSE -3 V DRV to GND VDRV 10 V Operating Ambient Temperature Range TA -25~85 °C Operating Junction Temperature TJ -25~125 °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. THERMAL RESISTANCES PARAMETER Junction to Ambient Junction to Case SYMBOL θJA θJC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RATINGS 100 32 UNIT °C/W °C/W 4 of 6 QW-R502-A13.a U8021 Preliminary CMOS IC ELECTRICAL CHARACTERISTICS (Unless specified: VCC= 5V~16V, VFB=VOUT, VBST-VPN=5V~8.2V, TA=-25°C~85°C) PARAMETER General VCC Supply Voltage VCC Quiescent Current VCC Under Voltage Lockout BST to PN Supply Voltage BST Quiescent Current Internal LDO LDO Output Dropout Voltage Linear Section Reference Voltage Load Regulation Line Regulation VCC Supply Rejection Gate Sourcing Current Gate Sinking Current LDFB Input Bias Current Soft Start Time Switching Section Reference Voltage Load Regulation Line Regulation Operating Frequency Ramp Amplitude (Note 2) Maximum Duty Cycle (Note 2) Minimum On-Time (Note 2) DH Rising/Falling Time DL Rising/Falling Time SYMBOL VCC IQVCC UVVCC VBST_PN IQBST VDRV VDROP VOL VREF FS Vm DMAX TON_MIN tSRC_DH tSINK_DH tSRC_DL tSINK_DL TEST CONDITIONS MIN TYP 4 VCC=12V, VBST-VPN=8.2V VHYST=100mV 5 4 VCC=12V, VBST-VPN=8.2V 8.6V<VCC<16V 4V<VCC<8.6V 0.65 TA=25°C, VCC=12V IO=0.2~4A VCC=10V~14V 0.495 0.75 1 1 -0.2 1.5 500 6V Swing at CL=3.3nF, VDRV=8.2V 0.500 0.4 0.4 600 0.8 97 125 40 25 30 40 30 DH, DL Nonoverlapping Time Voltage Error Amplifier Output Source Current 0.9 Output Sink Current 0.9 Notes: 1. This device is ESD sensitive. Use of standard ESD handling precautions is required. 2. Guaranteed by design, not tested in production. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw UNIT 16 7 4 10 3 V mA V V mA 8 0.4 LDFB=VOL, TA=25°C, VCC=12V IO=0~1A, VIN=3.3V, VCC=12V VIN=3.2V~3.4V, VCC=12V VIN=3.3V, VCC=10V~14V VGATE=6.5V VGATE=6.5V LDFB=.5V VIN=3.3V, VCC=12V TA=25°C 6V Swing at CL=3.3nF, VBST-VPN=8.2V MAX V V 0.85 0.4 0.4 0.4 -1.0 0.505 700 V % % % mA mA uA ms V % % KHz V % ns ns ns ns mA mA 5 of 6 QW-R502-A13.a U8021 Preliminary CMOS IC 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 6 of 6 QW-R502-A13.a