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 · Audio/Video equipment Applications · · Battery-powered equipment Communication 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. Output Voltage Tolerance HT7430 -3.0V ±5% 1 March 6, 2001 HT7430 Block Diagram Pin Assignment T O -9 2 S O T -8 9 VIN H T 7 4 3 0 ref F r o n t V ie w V O U T G N D GND V IN VOUT V ie w Pad Coordinates (0 ,0 ) 1 2 3 V IN V O U T B o tto m Pad Assignment G N D Unit: mm Pad No. X Y 1 -571.75 -578.00 2 175.75 -545.50 3 592.25 -545.50 V O U T V IN G N D 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 Storage Temperature ................-50°C to 125°C Power Consumption.............................. 250mW Operating Temperature ..................0°C to 70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² 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. 2 March 6, 2001 HT7430 Electrical Characteristics Ta=25°C HT7430, -3.0V output type Symbol Test Conditions Parameter Conditions VIN Min. Typ. Max. Unit -2.85 -3.0 -3.15 V 60 100 ¾ mA VOUT Output Voltage Tolerance -5V IOUT=10mA IOUT Output Current -5V DVOUT Load Regulation -5V 1mA£IOUT£50mA ¾ 60 120 mV VDIF Voltage Drop IOUT=1mA ¾ 100 ¾ mV ISS Current Consumption ¾ 200 350 mA DVOUT DVIN ´ VOUT Line Regulation ¾ ¾ 0.2 ¾ %/V VIN Input Voltage ¾ ¾ ¾ -24 V DVOUT DTa Temperature Coefficient ¾ ±0.45 ¾ mV/°C ¾ ¾ -5V No load -5V -4V£VIN£-12V IOUT=1mA ¾ IOUT=10mA 0°C<Ta<70°C Application Circuits Basic circuit V V IN C 1 1 0 m F IN H T 7 4 3 0 V V O U T O U T C 2 1 0 m F G N D C o m m o n S in g le p o in t G N D 3 C o m m o n March 6, 2001 HT7430 High output current positive voltage regulator T r1 V V IN IN V H T 7 4 3 0 R 1 V O U T G N D C 1 1 0 m F O U T C 2 1 0 m F C o m m o n C o m m o n S in g le p o in t G N D Short-Circuit protection by Tr1 V R s IN T r1 V IN V H T 7 4 3 0 R 1 C 1 1 0 m F O U T C 2 1 0 m F G N D C o m m o n V O U T C o m m o n S in g le p o in t G N D Circuit for increasing output voltage V V IN C 1 1 0 m F IN V H T 7 4 3 0 G N D IS V O U T C 2 1 0 m F V X X O U T R 1 S R 2 C o m m o n S in g le p o in t G N D VOUT = VXX ( 1 + 4 C o m m o n R2 ) + ISS R2 R1 March 6, 2001 HT7430 Circuit for increasing output voltage V V IN IN C 1 1 0 m F V H T 7 4 3 0 V O U T C 2 1 0 m F G N D IS V O U T R 1 X X S D 1 C o m m o n S in g le p o in t G N D C o m m o n VOUT = VXX + VD1 Constant current regulator V V IN IN C 1 1 0 m F V H T 7 4 3 0 O U T C 2 1 0 m F G N D IS V X X S R A IO U T R L C o m m o n IOUT = VXX + ISS RA Dual supply IC 1 V V IN IN H T 7 4 3 0 IC 2 V C 1 1 0 m F IN H T 7 4 3 0 G N D O U T V O U T C 3 1 0 m F G N D V V O U T V C 2 1 0 m F C o m m o n O U T R 1 C o m m o n 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 Ó 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