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LX8385B-33 Dataheets PDF



Part Number LX8385B-33
Manufacturers Microsemi Corporation
Logo Microsemi Corporation
Description 3 A LOW DROPOUT POSITIVE REGULATORS
Datasheet LX8385B-33 DatasheetLX8385B-33 Datasheet (PDF)

LIN D O C # : 8385 LX8385-xx/8385A-xx/8385B-xx 3 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S T H E I N F I N I T E P O W E R O F I N N O VA T I O N P R O D U C T I O N D A T A S H E E T DESCRIPTION The LX8385/8385A/8385B series ICs are positive regulators designed to provide 3A output current. Each regulator yields higher efficiency than currently available devices with all internal circuitry designed to operate down to a 1V input-to-outputdifferential. In these produ.

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LIN D O C # : 8385 LX8385-xx/8385A-xx/8385B-xx 3 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S T H E I N F I N I T E P O W E R O F I N N O VA T I O N P R O D U C T I O N D A T A S H E E T DESCRIPTION The LX8385/8385A/8385B series ICs are positive regulators designed to provide 3A output current. Each regulator yields higher efficiency than currently available devices with all internal circuitry designed to operate down to a 1V input-to-outputdifferential. In these products, the dropout voltage is fully specified as a function of load current. The LX8385's dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. The LX8385A/85B have a maximum dropout voltage of 1.3V. The LX8385B offers a tighter voltage reference tolerance: ±1.0% over line, load and temperature, with 0.8% initial accuracy. The LX8385/85A have 1.0% initial accuracy, with 2% over line, load and temperature. The LX8385/85A/85B series devices are pin-compatible with earlier 3-terminal regulators, such as 117 series products. While a 10µF output capacitor is required on both input and output of these new devices, this is generally included in most regulator designs. The quiescent current of the LX8385/ 85A/85B series products flows into the load, increasing efficiency. This feature contrasts with PNP regulator designs, where up to 10% of the output current is wasted as quiescent current. The LX8385-xxI is rated for -25°C to +125°C applications, and the LX8385-xxC /8385B-xxC is rated for 0°C to +125°C applications. K E Y F E AT U R E S s Three-Terminal Adjustable Or Fixed Output Voltage s Guaranteed 1% Voltage Reference Accuracy Over Line, Load And Temperature (LX8385B) s Guaranteed < 1.5V Headroom At 3A (LX8385) s Guaranteed < 1.3V Headroom At 3A (LX8385A/8385B) s Output Current Of 3A Minimum p 0.015% Line Regulation p 0.1% Load Regulation A P P L I C AT I O N S s High Efficiency Linear Regulators s Post Regulators For Switching Power Supplies s Battery Chargers s Constant Current Regulators s Graphics & Standard Supplies s Processor I/O Supply s Low Voltage Memory & Chipset Supplies NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com. PRODUCT HIGHLIGHT 3.3V, 3 A R E G U L AT O R IN OUT 121Ω 1% A VA I L A B L E O P T I O N S PER PAR T # Output Voltage 5V 1500µF, 6.3V 6MV1500GX LX8385 ADJ 3.3V at 3A 2x 1500µF, 6.3V 6MV1500GX from Sanyo Part # LX8385/85A/85B-00 LX8385/85A/85B-33 LX8385/85A/85B-05 Adjustable 3.3V 5.0V 200Ω 1% Other voltage options may be available — Please contact factory for details. PA C K A G E O R D E R I N F O R M AT I O N * TA (°C) Dropout Voltage 1.5V 0 to 125 -25 to 125 1.3V 1.3V 1.5V TO-220 P Plastic 3-pin LX8385-xxCP LX8385A-xxCP LX8385B-xxCP LX8385-xxIP TO-263 DD Plastic 3-pin LX8385-xxCD LX8385A-xxCD LX8385B-xxCD LX8385-xxID Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number (i.e. LX8385-00CDDT). "xx" refers to output voltage, please see table above. * Consult factory for availability of TO-3 Metal Can. Copyright © 1999 Rev. 2.0a 10/00 LINFINITY MICROELECTRONICS INC. 11861 W ESTERN A VENUE, G ARDEN G ROVE, CA. 92841, 714-898-8121, F AX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LX8385-xx/8385A-xx/8385B-xx 3 A LO W D R O P O U T P O S I T I V E R E G U L AT O R S P R O D U C T I O N D A T A S H E E T PACKAGE PIN OUTS TAB IS VOUT 3 2 1 A B S O L U T E M A X I M U M R AT I N G S (Note 1) Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P, DD & DL Packages) ............................................................................. 150°C Storage Temperature Range ...................................................................... -65°C to 150°C Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. VIN VOUT ADJ / GND* P PACKAGE (Top View) * Pin 1 is GND for fixed voltage versions. TAB IS VOUT T H E R M A L D ATA P PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA DD PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 3.0°C/W *60°C/W 3.0°C/W 60°C/W DD PACKAGE (Top View) * Pin 1 is GND for fixed voltage versions. 3 2 1 VIN VOUT ADJ / GND* Junction Temperature Calculation: TJ = TA + (PD x θJA). The θ JA numbers are guidelines for the thermal performance of the device/.


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