HT78XX Series 500mA TinyPowerTM LDO Features · Output voltage ranges: Fixed range of 1.8V, 2.5V, · Low quiescent current: 5mA (typ.) 2.7V, 3.0V, 3.3V, 5.0V type. · Current limiting · Highly accuracy: ±2% · Over-temperature shutdown · Low voltage drop: 360mV (typ.), · SOT-89, TO-92 Packages VOUT=5.0V at 500mA · Guaranteed output current: 500mA Applications · Battery powered systems · PCMCIA cards · Personal Digital Assistants · Personal Communication Equipment · Peripheral cards General Description as fixed voltage regulators, these devices can be used with external components to obtain variable voltages and currents. The HT78XX series of positive, linear regulators features low quiescent current (5mA typ.) with low dropout voltage, making them ideal for battery applications. The devices are capable of supplying 500mA of output current continuously. These rugged devices have Thermal Shutdown and Current Limiting to prevent device failure under the ²Worst² of operating conditions. They are available with several fixed output voltages ranging from 1.8V to 5.0V. Although designed primarily Selection Table Part No. Output Voltage HT7818 1.8V HT7825 2.5V HT7827 2.7V HT7830 3.0V HT7833 3.3V HT7850 5.0V Tolerance Package ±2% SOT-89 TO-92 Block Diagram V IN V O U T O v e rc u rre n t S h u td o w n T h e rm a l S h u td o w n R 1 A M P V re f R 2 G N D Rev. 1.00 1 March 2, 2007 HT78XX Series Pin Assignment S O T -8 9 T O -9 2 H T 7 8 X X H T 7 8 X X G N D V IN F r o n t V ie w T o p V ie w V O U T G N D V IN V O U T B o tto m G N D V IN V O U T G N D V IN V ie w V O U T N o te : F o r le a d fr e e d e v ic e s , a # m a r k is s u ffix e d a t th e e n d o f th e d a te c o d e . Absolute Maximum Ratings* Storage Temperature .......................... -50°C to 125°C Maximum Supply Voltage ............................ up to 8.5V Operating Temperature ......................... -40°C to 85°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. 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 0.50 W TO-92 0.50 W Power Dissipation Note: PD is measured at Ta= 25°C Rev. 1.00 2 March 2, 2007 HT78XX Series Electrical Characteristics Symbol Tj=25°C, VIN=VOUT+1.0V, IO=1mA, unless otherwise specified Parameter Test Conditions Min. Typ. Max. Unit VIN Input Voltage ¾ ¾ ¾ 8 V DVOUT Output Voltage Tolerance ¾ -2 ¾ 2 % ISS Quiescent Current IO=0mA ¾ 5 7 mA DVLOAD Load Regulation (Note1) 1mA£IOUT£500mA %/mA ¾ 0.004 0.008 VO£1.8V ¾ 800 1200 2.5V£VO£2.7V ¾ 500 650 VDROP Dropout Voltage (Note2) DVOUT=2% IOUT=500mA DVLINE Line Regulation VOUT+1.0V£VIN£8.0V ILIM Current Limit (Note3) DVOUT=10% Temperature Coefficient -40°C<Ta<85°C D V O D T U T a Note: 3.0V£VO£5.0V mV ¾ 360 500 ¾ 0.2 0.3 %/V 500 ¾ ¾ mA ¾ ±0.8 ¾ mV/°C 1. 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. 2. 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+1V with a fixed load. 3. Current limit is measured by pulsing for a short time. Application Circuits Basic Circuits V H T 7 8 X X S e r ie s V IN IN G N D C 1 1 m F V V O U T O U T C 2 2 .2 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 Typical Application Circuits · High output current positive voltage regulator IC T r1 V H T 7 8 X X S e r ie s V IN IN R 1 IR V = IR IO = IC IO E G S in g le p o in t G N D 1 O U T C 2 1 0 m F C o m m o n R V V O U T G N D C 1 1 0 m F Rev. 1.00 1 B E 1 IC E G - 1 + IR 1 C o m m o n , (1 + b ) E G 3 March 2, 2007 HT78XX Series · Increased Output voltage Circuit V V IN IN C 1 1 0 m F IS C 2 1 0 m F G N D S V V O U T H T 7 8 X X S e r ie s V O U T R 1 X X 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 ) + ISS R2 R1 · Dual Supply Circuit IC 1 V V IN IN IC 2 V IN V V G N D H T 7 8 X X S e r ie s C 1 1 0 m F V O U T H T 7 8 X X 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 7 8 X X 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 = VO x Rev. 1.00 4 O RA RB March 2, 2007 HT78XX Series Package Information 3-Pin SOT-89 Outline Dimensions I A J B C E D G F Symbol Rev. 1.00 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 5 March 2, 2007 HT78XX Series 3-Pin TO-92 Outline Dimensions A B D C E F G H Symbol Rev. 1.00 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° 6 March 2, 2007 HT78XX Series Product Tape and Reel Specifications Reel Dimensions D T 2 A C B T 1 SOT-89 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. 1.00 17-0.4 7 March 2, 2007 HT78XX Series TO-92 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. 1.00 8 March 2, 2007 HT78XX Series Carrier Tape Dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOT-89 Symbol Description Dimensions in mm W Carrier Tape Width 12.0+0.3 -0.1 P Cavity Pitch 8.0±0.1 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. 1.00 0.30±0.013 9.3 9 March 2, 2007 HT78XX Series TO-92 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 TO-92 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. 1.00 10 March 2, 2007 HT78XX 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 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.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. 1.00 11 March 2, 2007