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| HT7430 Negative Voltage Regulator Features * * * Low power consumption Low voltage drop Low temperature coefficient * * * High input voltage (up to -24V) High output current : 100mA (Pd 250mW) TO-92 and SOT-89 package Applications * * Battery-powered equipment Communication equipment * Audio/Video equipment General Description The HT7430 is a set of three-terminal high current high voltage regulator implemented in CMOS technology. They can deliver 100mA output current and allow an input voltage as high as -24V. CMOS technology ensures low voltage drop and low quiescent current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain variable voltages and currents. Selection Table Part No. HT7430 Output Voltage -3.0V Tolerance 5% 1 March 6, 2001 HT7430 Block Diagram VIN ref Pin Assignment T O -9 2 HT7430 F r o n t V ie w S O T -8 9 VOUT GND GND VOUT GND V IN V IN VOUT B o tto m V ie w Pad Assignment Pad Coordinates Pad No. 1 (0 ,0 ) Unit: mm X Y -578.00 -545.50 -545.50 -571.75 175.75 592.25 2 3 1 2 3 Chip size: 1550 1562 (mm)2 * The IC substrate should be connected to VDD in the PCB layout artwork. Absolute Maximum Ratings Supply Voltage ............................+0.3V to -26V Power Consumption.............................. 250mW Storage Temperature ................-50C to 125C Operating Temperature ..................0C to 70C Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. VOUT V IN GND 2 March 6, 2001 HT7430 Electrical Characteristics HT7430, -3.0V output type Symbol VOUT IOUT DVOUT VDIF ISS DVOUT DVIN VOUT VIN DVOUT DTa Parameter Test Conditions VIN -5V 3/4 Conditions 3/4 IOUT=1mA -4VVIN-12V IOUT=1mA 3/4 IOUT=10mA 0C Application Circuits Basic circuit V IN V C1 10mF IN HT7430 GND V OUT V C2 10mF OUT C om m on S in g le p o in t G N D C om m on 3 March 6, 2001 HT7430 High output current positive voltage regulator T r1 V V R1 C1 10mF V V IN IN HT7430 GND OUT OUT C2 10mF C om m on S in g le p o in t G N D C om m on Short-Circuit protection by Tr1 V IN Rs T r1 V R1 C1 10mF IN HT7430 GND V OUT V OUT C2 10mF C om m on S in g le p o in t G N D C om m on Circuit for increasing output voltage V IN V C1 10mF IN HT7430 GND IS S V OUT V OUT C2 10mF V XX R1 R2 C om m on S in g le p o in t G N D C om m on VOUT = VXX ( 1 + R2 ) + ISS R2 R1 4 March 6, 2001 HT7430 Circuit for increasing output voltage V IN V C1 10mF IN HT7430 GND V OUT V OUT C2 10mF V XX R1 IS S D1 C om m on S in g le p o in t G N D C om m on VOUT = VXX + VD1 Constant current regulator V IN V C1 10mF IN HT7430 GND IS S V OUT C2 10mF V XX R A IO UT R L C om m on IOUT = Dual supply VXX + ISS RA IC 1 V IN V IN HT7430 GND V OUT V C3 10mF OUT IC 2 V C1 10mF C om m on IN HT7430 GND V OUT V C2 10mF R1 OUT C om m on 5 March 6, 2001 HT7430 Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Sales Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Shanghai) Inc. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539 Tel: 510-252-9880 Fax: 510-252-9885 Copyright O 2001 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 6 March 6, 2001 |
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