HT1087 Series 0.5A General Purpose LDO Features · Output voltage ranges: Fixed range of 1.5V, 1.8V, · Guaranteed output current: 0.5A 2.5V, 3.3V, 5.0V or adjustable type. · Low quiescent current: 8mA (typ.) · High accuracy: ±2% · Integrated current limit & thermal protection circuits · Low voltage drop: 1.1V (typ.), VOUT=5.0V at 0.5A · SOT89, TO92 packages Applications · Active SCSI terminations · Motherboard clock supplies · Post regulator for switching power supplies · Battery chargers · Low voltage microcontrollers General Description fixed output voltage type with a range of 1.5V to 5.0V. Internal current limit and thermal protection circuits provide protection against overload conditions that could create excessive junction temperatures. The HT1087 devices are a series of three-terminal high current low voltage regulators. They can deliver an output current of 0.5A and can accept input voltages up to 12V. The devices are available in both adjustable and Selection Table Note: Part No. Output Voltage HT1087-ADJ Adjust HT1087-15 1.5V HT1087-18 1.8V HT1087-25 2.5V HT1087-33 3.3V HT1087-50 5.0V Package Marking SOT89 TO92 HT1087-ADJ HT1087-15 HT1087-18 HT1087-25 HT1087-33 HT1087-50 For lead free devices, a ²#² mark is suffixed at the end of the date code. Block Diagram V IN V O U T C u rre n t L im itin g A m p lifie r T h e rm a l P r o te c tio n E rro r A m p . B a n d g a p R e fe re n c e A D J G N D Rev. 1.10 1 October 5, 2007 HT1087 Series Pin Assignment T O 9 2 S O T 8 9 H T 1 0 8 7 -X X G N D / V O U T A D J V IN V IN G N D /A D J V O U T V O U T G N D / A D J F r o n t V ie w T o p V ie w H T 1 0 8 7 -X X V IN B o tto m V ie w V IN G N D /A D J V O U T Absolute Maximum Ratings* Input Supply Voltage ..................VSS-0.3V to VSS+13V Storage Temperature ...........................-50°C to 125°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*² Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. The guaranteed specifications apply only for the test conditions listed. Recommended Operating Conditions Input Supply Voltage ..................VSS-0.3V to VSS+12V Ambient Temperature ............................-40°C to 85°C Thermal Information Symbol qJA PD Parameter Thermal Resistance (Junction to Ambient) (Assume no ambient airflow, no heat sink) Package Max. Unit SOT-89 200 °C/W TO-92 200 °C/W SOT-89 0.5 W TO-92 0.5 W Power Dissipation Note: PD is measured at Ta= 25°C Rev. 1.10 2 October 5, 2007 HT1087 Series Electrical Characteristics Symbol VREF TJ=25°C, VIN=VOUT+1.5V, IO=10mA, unless otherwise specified (see note 1) Parameter Reference Voltage VOUT Output Voltage Test Conditions Min. Typ. Max. Unit 2.75V £ VIN £ 12V 1.225 1.250 1.275 V HT1087-15 1.470 1.500 1.530 V HT1087-18 1.764 1.800 1.836 V HT1087-25 2.450 2.500 2.550 V HT1087-33 3.234 3.300 3.366 V HT1087-50 4.900 5.000 5.100 V DVLOAD Load Regulation (see note 2) IOUT=0.5A 1 ¾ 20 mV DVLINE Line Regulation 2.75V £ VIN £ 12V ¾ 0.015 0.15 %/V VDIF Dropout Voltage (see note 3) DVOUT=2%, IOUT=0.5A ¾ 1.1 1.3 V ILIMIT Current Limit (see note 4) DVOUT=10% 0.5 1.5 ¾ A IADJ Adjust Pin Current (Variable Version) 2.75V £ VIN £ 12V ¾ 55 120 mA ISS Quiescent Current (Fixed Version) 2.75V £ VIN £ 12V ¾ 8 13 mA RR Ripple Rejection 120Hz input ripple COUT=22mF ¾ 60 ¾ dB Temperature Coefficient -40°C<Ta<85°C ¾ ±0.4 ¾ mV/°C D V O D T U T a Note: 1. Specifications are production tested at room temperature, Ta. Specifications within the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 2. Load regulation is measured at a constant junction temperature, using pulse testing with a low ON time and is guaranteed up to the maximum power dissipation. Power dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - Ta) / qJA. 3. Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the output voltage from the value at VIN = VOUT+1.5V with a fixed load. 4. Current limit is measured by pulsing for a short time. Rev. 1.10 3 October 5, 2007 HT1087 Series Application Circuits Basic Circuits · Variable voltage type V IN V IN C 1 1 0 m F V R 1 1 2 5 W R E F A D J IA V O U T V O U T H T 1 0 8 7 -A D J D J C 2 1 0 m F R 2 1 k W C o m m o n C o m m o n S in g le p o in t G N D VOUT = VREF ( 1 + Note: R2 ) + IADJ R2 R1 C1 is required if the needed if the device is located far from filter capacitors, the recommended value is 10mF. C2 is required for stability, the recommended value is 10mF. R1 is required for regulation, the recommended value is 125W. · Fixed voltage type V IN H T 1 0 8 7 S e r ie s V IN G N D C 1 1 0 m F C o m m o n Note: V 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 C1 is required if the needed if the device is located far from filter capacitors, the recommended value is 10mF. C2 is required for stability, the recommended value is 10mF. Typical Application Circuits · 1.25~10.5V regulator 2 .7 5 V £ V IN £ 1 2 V C 1 1 0 m F V IN V A D J IA V V O U T H T 1 0 8 7 -A D J R E F D J R 1 1 2 5 W O U T C 2 1 0 m F R 2 1 k W C o m m o n C o m m o n S in g le p o in t G N D VOUT = VREF ( 1 + Rev. 1.10 4 R2 ) + IADJ R2 R1 October 5, 2007 HT1087 Series · Digitally selected outputs V IN V IN V V O U T H T 1 0 8 7 -A D J O U T R 1 1 2 5 W A D J C 1 1 0 m F C 2 1 0 m F R 2 R 3 R 4 R 5 R n C o m m o n C o m m o n S in g le p o in t G N D In p u ts N o te : R 2 c a n s e t th e m a x im u m v o lta g e . · High output current positive voltage regulator IC T r1 V H T 1 0 8 7 S e r ie s V IN IN 1 R 1 V V O U T IR IO E G G N D C 1 1 0 m F 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 R 1 V = IR IO = IC O U T B E 1 IC E G - 1 + IR 1 , (1 + b ) E G · Increased Output voltage Circuit V V IN IN C 1 1 0 m F IS S V V O U T H T 1 0 8 7 S e r ie s C 2 1 0 m F G N D V X X O U T R 1 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 VXX ISS R1 = Rev. 1.10 5 October 5, 2007 HT1087 Series · Dual Supply Circuit IC 1 V V IN IN IC 2 V IN V V G N D H T 1 0 8 7 S e r ie s C 1 1 0 m F V O U T H T 1 0 8 7 S e r ie s X X 1 O U T 1 C 3 1 0 m F V O U T V C 2 1 0 m F G N D C o m m o n R 1 V O U T 2 X X 2 C o m m o n S in g le p o in t G N D VOUT1 = VXX2 + VXX1 VOUT2 = VXX2 · Tracking Voltage Regulator V V IN IN C 1 1 0 m F V V O U T H T 1 0 8 7 S e r ie s C 2 1 0 m F G N D R A R B O U T S in g le p o in t G N D -V -V IN -VO = VOUT x Rev. 1.10 6 O RA RB October 5, 2007 HT1087 Series Package Information 3-Pin SOT89 Outline Dimensions I A J B C E D G F Symbol Rev. 1.10 H Dimensions in mil Min. Nom. Max. A 173 ¾ 181 B 64 ¾ 72 C 90 ¾ 102 D 35 ¾ 47 E 155 ¾ 167 F 14 ¾ 19 G 17 ¾ 22 H ¾ 59 ¾ I 55 ¾ 63 J 14 ¾ 17 7 October 5, 2007 HT1087 Series 3-Pin TO92 Outline Dimensions A B D C E F G H Symbol Rev. 1.10 Dimensions in mil Min. Nom. Max. A 170 ¾ 200 B 170 ¾ 200 C 500 ¾ ¾ D 11 ¾ 20 E 90 ¾ 110 F 45 ¾ 55 G 45 ¾ 65 H 130 ¾ 160 I 8 ¾ 18 a 4° ¾ 6° 8 October 5, 2007 HT1087 Series Product Tape and Reel Specifications Reel Dimensions D T 2 A C B T 1 SOT89 Symbol Description Dimensions in mm A Reel Outer Diameter 180±1.0 B Reel Inner Diameter 62±1.5 C Spindle Hole Diameter 12.75+0.15 D Key Slit Width 1.9±0.15 T1 Space Between Flange 12.4+0.2 T2 Reel Thickness Rev. 1.10 17-0.4 9 October 5, 2007 HT1087 Series TO92 Reel Dimensions (Unit: mm) P a c k a g e U p , F la t S id e U p 3 0 P a c k a g e U p , F la t S id e D o w n 4 3 5 8 8 8 3 6 0 Rev. 1.10 10 October 5, 2007 HT1087 Series Carrier Tape Dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOT89 Symbol W Description Dimensions in mm Carrier Tape Width 12.0+0.3 -0.1 8.0±0.1 P Cavity Pitch E Perforation Position 1.75±0.1 F Cavity to Perforation (Width Direction) 5.5±0.05 D Perforation Diameter 1.5+0.1 D1 Cavity Hole Diameter 1.5+0.1 P0 Perforation Pitch 4.0±0.1 P1 Cavity to Perforation (Length Direction) 2.0±0.10 A0 Cavity Length 4.8±0.1 B0 Cavity Width 4.5±0.1 K0 Cavity Depth 1.8±0.1 t Carrier Tape Thickness C Cover Tape Width Rev. 1.10 0.30±0.013 9.3 11 October 5, 2007 HT1087 Series TO92 Carrier Tape Dimensions P D h W 2 H 1 H H 0 l1 W 0 t W 1 W F 1 F 2 D 0 P 2 P 0 TO92 Symbol Note: Description Dimensions in mm I1 Taped Lead Length (2.5) P Component Pitch 12.7±1.0 P0 Perforation Pitch 12.7±0.3 P2 Component to Perforation (Length Direction) 6.35±0.4 F1 Lead Spread 2.5+0.4 -0.1 F2 Lead Spread 2.5+0.4 -0.1 Dh Component Alignment W Carrier Tape Width 18.0+1.0 -0.5 W0 Hold-down Tape Width 6.0±0.5 W1 Perforation Position 9.0±0.5 W2 Hold-down Tape Position H0 Lead Clinch Height 16.0±0.5 H1 Component Height Less than 24.7 D0 Perforation Diameter 4.0±0.2 t Taped Lead Thickness 0.7±0.2 H Component Base Height 19.0±0.5 0±0.1 (0.5) Thickness less than 0.38±0.05mm~0.5mm P0 Accumulated pitch tolerance: ±1mm/20pitches. ( ) Bracketed figures are for consultation only Rev. 1.10 12 October 5, 2007 HT1087 Series Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 86-21-6485-5560 Fax: 86-21-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9722 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 Fax: 86-10-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 86-28-6653-6590 Fax: 86-28-6653-6591 Holmate Semiconductor, Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holmate.com Copyright Ó 2007 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¢s products are not authorized for use as critical components in life support devices or systems. 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. Rev. 1.10 13 October 5, 2007