HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 1/5 H1085U Series 3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR Features • Low Dropout Voltage 1.2V at 3A. • Adjustable or Fixed Voltage. • Line Regulation Typically 0.015%. • Load Regulation Typically 0.05%. • Adjust Pin Current Less Than 90 uA. • Over Current Protection. • Thermal Protection. Applications • High Efficiency Linear Regulators. • Post Regulators For Switching Supplies. • 5V to 3.3V Voltage Converter. • Battery Charger. General Description The H1085U is a 3A low-dropout positive voltage regulator. It is available in fixed and adjustable output voltage versions. Over Current and thermal protection are integrated onto the chip. Output current will decrease while it reaches the pre-set current or temperature limit. The dropout voltage is specified at 1.2V Maximum at full rated output current. H1085U Series provides excellent regulation over variations due to changes in line, load and temperature. H1085U is three terminal regulator and available in popular packages. Device Selection Guide Device H1085U H1085-3.3U Output Voltage 1.3V to 4V 3.3 Package TO-263 Absolute Maximum Ratings Parameter Input Voltage Power Dissipation Thermal Resistance Junction To Case TO-263 Thermal Resistance Junction To Ambient TO-263 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec Symbol VIN PD θJC θJA Tj TSTG TLEAD Maximum 7 Internally Limited 3 50 0 To 125 -65 To 150 260 Units V W °C/W °C/W °C °C °C Typical Application H1085-3.3U + DC 4.75V to 5.25V 10uF TAN 10uF TAN Load GND HSMC Product Specification HI-SINCERITY Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 2/5 MICROELECTRONICS CORP. Block Diagram Input Current Limiting Amplifier Thermal Protection Error AMP Output Bandcap Reference ADJ/COM Electrical Characteristics H1085U (adj version) Parameter Reference Voltage Adj Voltage Symbol Line Regulation RegLINE Load Regulation RegLOAD Dropout Voltage ∆VOUT, ∆VREF=1% Current Limit Temperature Coeff. Adjust Pin Current Adjust Pin Current Change Temperature Stability Minimum Load Current RMS Output Noise Ripple Rejection Ratio Test Conditions VIN=5V, IO=10mA, Tj=25°C VIN=5V, IO=10mA, Over Temp. VIN=2.75~7V, IO=10mA, Tj=25°C VIN=2.75~7V, IO=10mA, Over Temp. VIN=5V, IO=10mA~3A,Tj=25°C VIN=5V, IO=10mA~3A, Over Temp. VIN=2.75~7V, IO=10mA~3A, Tj=25°C VIN=2.75~7V, IO=10mA~3A, Over Temp. VIN=2.75~7V, Over Temp. VIN=2.75~7V, IO=10mA~3A VIN=2.75~7V, IO=10mA~3A,Tj=25°C VIN=2.75~7V, IO=10mA~3A, Over Temp. VIN=2.75~7V, IO=10mA~3A, Over Temp. VIN=5V, IO=500mA, Over Temp. VIN=5V Tj=25°C VIN=5V, IO=3A, Over Temp. Min 1.238 1.225 3 60 Typ 1.250 1.250 0.015 0.035 0.05 0.2 1 1 4.5 0.005 55 0.2 0.5 5 0.003 72 Max 1.262 1.275 0.2 0.2 0.3 0.4 1.2 90 5 10 - Min 3.267 3.234 3 Typ 3.3 3.3 0.015 0.035 0.05 0.2 1 1 4.5 Max 3.333 3.366 0.2 0.2 0.3 0.4 1.2 - Units IS Test Conditions VIN=5V, IO=0A,Tj=25°C VIN=5V, IO=0A, Over Temp. VIN=4.5~7V, IO=0A, Tj=25°C VIN=4.5~7V, IO=0A, Over Temp. VIN=5V, IO=0A~3A,Tj=25°C VIN=5V, IO=0A~3A, Over Temp. VIN=4.5~7V, IO=0A~3A, Tj=25°C VIN=4.5~7V, IO=0A~3A, Over Temp. VIN=4.5~7V, Over Temp. IQ VIN=5V, IO=0A~3A,Over Temp. - 12 13 mA TC TS VN RA VIN=4.5~7V, IO=0A~3A VIN=5V, IO=500mA, Over Temp. Tj=25°C VIN=5V, IO=3A, Over Temp. 60 0.005 0.5 0.003 72 - %/°C % % dB VREF VD IS TC Iadj ∆Iadj TS IO VN RA Units V % % V A %/°C uA % mA % dB H1085-3.3U Parameter Output Voltage Fixed Voltage Symbol Line Regulation RegLINE Load Regulation RegLOAD Dropout Voltage ∆VOUT, ∆VREF=1% Current Limit Quiescent Current Fixed Model Temperature Coeff. Temperature Stability RMS Output Noise Ripple Rejection Ratio VO VD V % % V A HSMC Product Specification HI-SINCERITY Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 3/5 MICROELECTRONICS CORP. Applications Description • Output Voltage Adjustment Like most regulators, the H1085U regulates the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version, the VREF is available externally as 1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minimum output load). The output voltage is given by the following equation : VOUT =VREF (1+R2/R1) + IADJ R2 On fixed versions of H1085U, the voltage divider is provided internally. In Out V IN V OUT ADJ V REF R1 I ADJ 10uA R2 • Thermal Protection H1085U has thermal protection which limits junction VOUT =VREF (1+R2/R1) + IADJ R2 temperature to 150°C. However, device functionality is only guaranteed to a maximum junction temperature of +125°C. The power dissipation and junction temperature for H1085U in TO-263 package given by PD=(VIN - VOUT) IOUT, TJUNCTION=TAMBIENT+(PDxθJA), Note : TJUNCTION must not exceed 125°C • Current Limit Protection H1085U is protected against overload conditions. Current protection is triggered at typically 4.5A. • Stability And Load Regulation H1085U requires a capacitor from VOUT to GND to RP provide compensation feedback to the internal gain stage. Parasitic This is to ensure stability at the output terminal. Typically, a Line Resistance In Out 10uF tantalum or 50uF aluminum electrolytic is sufficient. Adj V IN Note : It is important that the ESR for this capacitor does R1 not exceed 0.5Ω. Connect RL R1 to Case The output capacitor does not have a theoretical upper limit and increasing its value will increase stability. COUT = R2 100 uF or more is typical for high current regulator design. H1085U load regulation is limited by the resistance of the wire connecting it to the load(RP). For the adjustable Connect version, the best load regulation is accomplished when the R2 to Load top of the resistor divider(R1) is connected directly to the output pin of the H1085U. When so connected, RP is not multiplied by the divider ratio. For fixed output versions, the top of R1 is internally connected to the output and ground pin can be connected to low side of the load as a negative side sense if, so desired. • Thermal Consideration The H1085U series contain thermal limiting circuitry designed to protect itself for over-temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As mention in thermal protection section, we need to consider all sources of thermal resistance between junction and ambient. It contains junction-to-case, case-to-heat-sink interface and heat sink resistance itself. An additional heat sink is applied externally sometimes. It can increase the maximum power dissipation. For example, the equivalent junction temperature of 1A output current is 115°C without external heat sink. Under the same junction temperature IC can operates 3A with an adequate heat sink. Therefore, to attach an extra heat sink is recommended. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. The bonding wires are appending paths. The former is the lowest resistance path. Proper mounting is required to ensure the best possible thermal flow this area of the package to the heat sink. Thermal compound at the case-to-heat-sink interface is strongly recommended. The case of all devices in this series is electrically connected to the output. Therefore, if the case of the device must be electrically isolated, a thermally conductive spacer can be used, as long its thermal resistance is considered. HSMC Product Specification HI-SINCERITY Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 4/5 MICROELECTRONICS CORP. • Protection Diode (The figure is shown as Regulator with Reverse Diode Protection in advanced applications) In general operation, H1085U does not need any protection diodes. From the cross-section structure of H1085U, the output pin is connected to P+ substrate, and the input pin is connected to N- well. There is a parasitic reverse diode between them. It can handle microsecond surge currents of 50A to 100A. Even with large output capacitance, it is very difficult to get those values of surge currents in normal operation. Only with high value output capacitors, such as 1000uF. And with the input pin instantaneously shorted to ground. can damage occur. A crowbar circuit at the input of the H1085U can generate those kinds of currents, and a diode from output to input is recommended. Normal power supply cycling or even plugging and unplugging in the system will not generate currents large enough to do any damage. • Advanced Applications H 1085U H 1085U Vin Vo *20m ohm Vin=7V Vo=1.5~3.45 GND 1K 10uF H 1085U 10uF 2K GND GND 10uF *20m ohm 10uF 10uF GND GND GND GND Paralleling Regulators *20m ohm is ballast resistance.. The inter - connection of #18 wire could act as ballast resistance. Adjustable Output Voltage H1085U V in VO 1K 10uF 10uF GND Zener Diode or Voltage Reference GND *Vo = Vref ( 1+R2/R1 ) + Iadj x R2 **Optional for improved ripple rejection. Regulator with Reference H 1085U Vin 10uF GND 10uF GND Vo 100uF GND GND *Please refer to "protection diode section" for detailed description. Regulator with Reverse Diode Protection HSMC Product Specification HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 5/5 TO-263 Dimension Marking : E C A F α1 2 HSMC Logo Part Number Date Code Product Series Rank Style : Pin 1.Ground/ADJ 2.Vout 3.Vin B D 1 2 α2 3 I G J K L α3 H 3-Lead TO-263 Plastic Surface Mounted Package HSMC Package Code : U *:Typical Inches Min. Max. 0.3800 0.4050 0.3300 0.3700 0.0550 0.5750 0.6250 0.1600 0.1900 0.0450 0.0550 0.0900 0.1100 0.0180 0.0290 DIM A B C D E F G H Millimeters Min. Max. 9.65 10.29 8.38 9.40 1.40 14.61 15.88 4.06 4.83 1.14 1.40 2.29 2.79 0.46 0.74 DIM I J K L α1 α2 α3 Inches Min. Max. 0.0500 0.0700 *0.1000 0.0450 0.0550 0.0200 0.0390 - Millimeters Min. Max. 1.27 1.78 *2.54 1.14 1.40 0.51 0.99 6° 8° 6° 8° 0° 5° Notes : 1.Dimension and tolerance based on our Spec. dated Jan. 09,1998. 2.Controlling dimension : millimeters. 3.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 4.If there is any question with packing specification or packing method, please contact your local HSMC sales office. Material : • Lead : 42 Alloy ; solder plating • Mold Compound : Epoxy resin family, flammability solid burning class:UL94V-0 Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of HSMC. • HSMC reserves the right to make changes to its products without notice. • HSMC semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • HSMC assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory : • Head Office (Hi-Sincerity Microelectronics Corp.) : 10F.,No. 61, Sec. 2, Chung-Shan N. Rd. Taipei Taiwan R.O.C. Tel : 886-2-25212056 Fax : 886-2-25632712, 25368454 • Factory 1 : No. 38, Kuang Fu S. Rd., Fu-Kou Hsin-Chu Industrial Park Hsin-Chu Taiwan. R.O.C Tel : 886-3-5983621~5 Fax : 886-3-5982931 • Factory 2 : No. 17-1, Ta-Tung Rd., Fu-Kou Hsin-Chu Industrial Park Hsin-Chu Taiwan. R.O.C Tel : 886-3-5977061 Fax : 886-3-5979220 HSMC Product Specification