HT74XX 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 HT74XX series 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. They are available with several fixed output voltages ranging from -2.4V to -15V. 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% HT7450 -5.0V ±5% 1 January 26, 2000 HT74XX Block Diagram Pin Assignment SOT-89 TO-92 VIN HT74XX ref Front View VOUT GND VIN GND VIN VOUT GND Bottom View VOUT Pad Assignment Pad Coordinates (0 ,0 ) 1 2 3 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 January 26, 2000 HT74XX Electrical Characteristics Ta=25°C HT7430, -3.0V output type Symbol Parameter Test Conditions Conditions VIN Min. Typ. Max. Unit -2.85 -3.0 -3.15 V 60 100 ¾ mA 120 mV VOUT Output Voltage Tolerance -5V IOUT=10mA IOUT Output Current -5V DVOUT Load Regulation -5V 1mA£IOUT£50mA ¾ 60 IOUT=1mA ¾ 100 ¾ mV ¾ 200 350 mA ¾ 0.2 ¾ %/V ¾ ¾ -24 V ¾ ±0.45 ¾ mV/°C VDIF Voltage Drop ISS DVOUT DVIN ´ VOUT Current Consumption Line Regulation ¾ VIN DVOUT DTa Input Voltage ¾ Temperature Coefficient ¾ ¾ -5V No load -4V£VIN£-12V IOUT=1mA ¾ -5V IOUT=10mA 0°C<Ta<70°C Ta=25°C HT7450, -5.0V output type Symbol Parameter Test Conditions Conditions VIN Min. Typ. Max. Unit -4.75 -5.0 -5.25 V 100 150 ¾ mA VOUT Output Voltage -7V IOUT=10mA IOUT Output Current -7V DVOUT Load Regulation -7V 1mA£IOUT£30mA ¾ 60 150 mV VDIF Voltage Drop IOUT=1mA ¾ 100 ¾ mV ISS Current Consumption ¾ 330 500 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 ±0.75 ¾ mV/°C ¾ ¾ -7V No load -7V -6V£VIN£-15V IOUT=1mA ¾ IOUT=10mA 0°C<Ta<70°C 3 January 26, 2000 HT74XX Application Circuits Basic circuit V V IN 0 6 % " : : S e r ie s IN C 1 1 0 m F V V O U T O U T C 2 1 0 m F G N D C o m m o n C o m m o n S in g le p o in t G N D High output current positive voltage regulator T r1 V V IN 0 6 % " : : S e r ie s IN R 1 V G N D C 1 1 0 m F V O U T O U T C 2 1 0 m F C o m m o n S in g le p o in t G N D C o m m o n Short-Circuit protection by Tr1 V R s IN T r1 V R 1 C 1 1 0 m F IN 0 6 % " : : 5 A H EA I G N D C o m m o n V O U T O U T C 2 1 0 m F S in g le p o in t G N D 4 V C o m m o n January 26, 2000 HT74XX Circuit for increasing output voltage V V IN IN V 0 6 % " : : S e r ie s C 1 1 0 m F G N D IS V O U T C 2 1 0 m F V O U T R 1 X X S R 2 C o m m o n S in g le p o in t G N D VOUT = VXX ( 1 + C o m m o n R2 ) + I SS R2 R1 Circuit for increasing output voltage V V IN IN V 0 6 % " : : S e r ie s C 1 1 0 m F 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 C 1 1 0 m F IN V 0 6 % " : : S e r ie s O U T C 2 1 0 m F G N D IS S V X X R A IO U T R L C o m m o n I OUT = VXX + I SS RA 5 January 26, 2000 HT74XX Dual supply IC 1 V V IN IN 0 6 % " : : S e r ie s IC 2 V C 1 1 0 m F IN 0 6 % " : : S e r ie s 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 G N D C o m m o n O U T R 1 C o m m o n 6 January 26, 2000 HT74XX Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) 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 Copyright ã 2000 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. 7 January 26, 2000