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HI-SINCERITY
MICROELECTRONICS CORP.
Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 1/5
H1085J 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 H1085J 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 H1085J H1085-3.3J Vout Voltage 1.3V to 4V 3.3 Package D-PAK TO-252
Absolute Maximum Ratings
Parameter Input Voltage Power Dissipation Thermal Resistance Junction To Case TO-252 Thermal Resistance Junction To Ambient TO-252 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec Symbol VIN PD JC JA Tj TSTG TLEAD Maximum 7 Internally Limited 15 156 0 To 125 -65 To 150 260 Units V W C/W C/W C C C
Typical Application
H1085-3.3J
+
4.75V to 5.25V
DC
10uF TAN
10uF TAN
Load
GND
HSMC Product Specification
HI-SINCERITY
MICROELECTRONICS CORP.
Block Diagram
Input
Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 2/5
Current Limiting Amplifier Thermal Protection Output
Error AMP
Bandcap Reference
ADJ/COM
Electrical Characteristics
H1085J (adj version)
Parameter Reference Voltage Adj Voltage Line Regulation Load Regulation 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 Symbol VREF RegLINE RegLOAD VD IS TC Iadj Iadj TS IO VN RA Symbol VO RegLINE RegLOAD VD IS IQ TC TS VN RA Test Conditions VIN=5V, IO=10mA, Tj=25C VIN=5V, IO=10mA, Over Temp. VIN=2.75~7V, IO=10mA, Tj=25C VIN=2.75~7V, IO=10mA, Over Temp. VIN=5V, IO=10mA~3A,Tj=25C VIN=5V, IO=10mA~3A, Over Temp. VIN=2.75~7V, IO=10mA~3A, Tj=25C 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=25C 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=25C VIN=5V, IO=3A, Over Temp. Test Conditions VIN=5V, IO=0A,Tj=25C VIN=5V, IO=0A, Over Temp. VIN=4.5~7V, IO=0A, Tj=25C VIN=4.5~7V, IO=0A, Over Temp. VIN=5V, IO=0A~3A,Tj=25C VIN=5V, IO=0A~3A, Over Temp. VIN=4.5~7V, IO=0A~3A, Tj=25C VIN=4.5~7V, IO=0A~3A, Over Temp. VIN=4.5~7V, Over Temp. VIN=5V, IO=0A~3A,Over Temp. VIN=4.5~7V, IO=0A~3A VIN=5V, IO=500mA, Over Temp. Tj=25C VIN=5V, IO=3A, Over Temp. Min 1.238 1.225 3.0 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 Units V % % V A %/C uA % mA % dB
H1085-3.3J
Parameter Output Voltage Fixed Voltage Line Regulation Load Regulation Dropout Voltage VOUT, VREF=1% Current Limit Quiescent Current Fixed Model Temperature Coeff. Temperature Stability RMS Output Noise Ripple Rejection Ratio Min 3.267 3.234 3 60 Typ 3.3 3.3 0.015 0.035 0.05 0.2 1 1 4.5 12 0.005 0.5 0.003 72 Max 3.333 3.366 0.2 0.2 0.3 0.4 1.2 13 Units V % % V A mA %/C % % dB
HSMC Product Specification
HI-SINCERITY
MICROELECTRONICS CORP.
Applications Description
* Output Voltage Adjustment
Like most regulators, the H1085J 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 H1085J, the voltage divider is provided internally.
In V IN ADJ
Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 3/5
Out V OUT V REF I ADJ 10uA R1
R2
* Thermal Protection
H1085J has thermal protection which limits junction VOUT =VREF (1+R2/R1) + IADJ R2 temperature to 150C. However, device functionality is only guaranteed to a maximum junction temperature of +125C. The power dissipation and junction temperature for H1085J in TO-252 package given by PD=(VIN - VOUT) IOUT, TJUNCTION=TAMBIENT+(PDxJA), Note : TJUNCTION must not exceed 125C
* Current Limit Protection
H1085J is protected against overload conditions. Current protection is triggered at typically 4.5A.
* Stability And Load Regulation
H1085J 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 0.5. 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. H1085J 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 H1085J. 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 H1085J 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 115C 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
MICROELECTRONICS CORP.
* Protection Diode
Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 4/5
(The figure is shown as Regulator with Reverse Diode Protection in advanced applications) In general operation, H1085J does not need any protection diodes. From the cross-section structure of H1085J, 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 H1085J 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 1085J
Vin=7V 1K 2K 10uF GND 10uF GND
10uF Vin
H 1085J
*20m ohm GND
Vo
Vo=1.5~3.45
H 1085J
*20m ohm GND
10uF
10uF
GND
GND
GND
Paralleling Regulators
Adjustable Output Voltage
*20m ohm is ballast resistance.. The inter - connection of #18 wire could act as ballast resistance.
H1085J
V in 1K VO Vin
H 1085J
Vo
10uF
10uF
Zener Diode or Voltage Reference GND
10uF
10uF GND GND
100uF GND
GND
GND
*Vo = Vref ( 1+R2/R1 ) + Iadj x R2 **Optional for improved ripple rejection.
*Please refer to "protection diode section" for detailed description.
Regulator with Reference
Regulator with Reverse Diode Protection
HSMC Product Specification
HI-SINCERITY
MICROELECTRONICS CORP.
TO-252 Dimension
A C
Spec. No. : Preliminary Data Issued Date : 1998.06.01 Revised Date : 1999.08.01 Page No. : 5/5
Marking :
HSMC Logo Part Number Date Code Product Series Rank
B
D
(A:H1085J, 3:H1085-3.3J)
L
F
G
Ink Mark
Style : Pin 1.Ground/ADJ 2.Vout 3.Vin
3 H E K 2 I 1 J
3-Lead TO-252 Plastic Surface Mount Package HSMC Package Code : J *:Typical
DIM A B C D E F
Inches Min. Max. 0.0177 0.0217 0.0650 0.0768 0.0354 0.0591 0.0177 0.0236 0.2520 0.2677 0.2125 0.2283
Millimeters Min. Max. 0.45 0.55 1.65 1.95 0.90 1.50 0.45 0.60 6.40 6.80 5.40 5.80
DIM G H I J K L
Inches Min. Max. 0.0866 0.1102 *0.0906 0.0354 0.0315 0.2047 0.2165 0.0551 0.0630
Millimeters Min. Max. 2.20 2.80 *2.30 0.90 0.80 5.20 5.50 1.40 1.60
Notes : 1.Dimension and tolerance based on our Spec. dated May. 05,1996.
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

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