LX8586A-33

LIN D O C # : 8586 LX8586-xx/8586A-xx 6A L OW D ROPOUT P OSITIVE R E G U L AT O R S T HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX8586/86A series ICs are low dropout three-terminal regulators with a minimum of 6A output current. Pentium® Processor, Power PCTM , Cyrix® 6x86TM and AMD-K5TM applications requiring fast transient response are ideally suited for this product family. The LX8586A is guaranteed to have < 1.1V at 6A and the LX8586 < 1.3V at 6A dropout voltage, making them ideal to provide well-regulated outputs of 2.5V to 3.6V using a 5V input supply. Fixed versions are also available and specified in the Available Options table below. Current limit is trimmed above 6.1A to ensure adequate output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The LX8586/86A series devices are available in both through-hole versions of the industry-standard, 3-pin TO-220 and TO-247 power packages. Along with the standard µP supply applications, the LX8586 series of products are ideal for Pentium® Pro Processor applications such as GTL+ Bus terminators (see application below). K E Y F E AT U R E S s THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT s GUARANTEED < 1.1V HEADROOM AT 6A (LX8586A) s GUARANTEED < 1.3V HEADROOM AT 6A (LX8586) s OUTPUT CURRENT OF 6A MINIMUM p FAST TRANSIENT RESPONSE p 1% VOLTAGE REFERENCE INITIAL ACCURACY p OUTPUT SHORT CIRCUIT PROTECTION p BUILT-IN THERMAL SHUTDOWN s EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT A P P L I C AT I O N S s s s s s s s GTL+ BUS TERMINATORS PENTIUM PROCESSOR SUPPLIES POWER PC SUPPLIES MICROPROCESSOR SUPPLIES LOW VOLTAGE LOGIC SUPPLIES POST REGULATOR FOR SWITCHING SUPPLY LXE9001 EVALUATION BOARD FOR PENTIUM APPLICATIONS AVAILABLE. CONSULT FACTORY s CYRIX 6x86TM s AMD-K5TM AND AMD-K6TM PRODUCT HIGHLIGHT 1.5V, 6A R E G U L AT O R H.S. (Note A) 3.3V 1500µF Sanyo 6MV1500GX From Silverbox Power Supply LX8586 IN ADJ OUT 121Ω ±1% 1.5V/6A To GTL+ Terminator 4x 1500µF Sanyo 6MV1500GX A VA I L A B L E O P T I O N S Part # LX8586/86A-00 LX8586/86A-33 PER PAR T # 24.3Ω ±1% Output Voltage Adjustable 3.3V A P P L I C AT I O N OF LX8586 AS 1 . 5 V G T L + B U S T E R M I N AT O R Other voltage options may be available — Please contact factory for details. Note A: See application note, page 3. PA C K A G E O R D E R I N F O R M AT I O N Dropout TA (°C) P Plastic TO-220 V Plastic TO-247 Voltage 3-pin 3-terminal 0 to 125 1.3V 1.1V LX8586-xxCP LX8586A-xxCP LX8586-xxCV LX8586A-xxCV "xx" refers to output voltage, please see table above. F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1 Copyright © 1996 Rev. 1.0 12/96 11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LX8586-xx/8586A-xx 6 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 P RODUCTION D ATA S HEET A B S O L U T E M A X I M U M R AT I N G S (Note 1) PACKAGE PIN OUTS TAB IS VOUT 3 2 1 Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P Package) ................................................................................................ 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. T H E R MAL DATA P PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA V PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 1.6°C/W 35°C/W 2.7°C/W 60°C/W TAB ON REVERSE SIDE IS V OUT 3 2 1 VIN VOUT ADJ / GND* V PACKAGE (Top View) * Pin 1 is GND for fixed voltage versions. Junction Temperature Calculation: TJ = TA + (PD x θJA). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. 2 Copyright © 1996 Rev. 1.0 12/96 PRODUCT DATABOOK 1996/1997 LX8586-xx/8586A-xx 6A L OW D ROPOUT P OSITIVE R E G U L AT O R S P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8586-xx/8586A-xx with 0°C ≤ TA ≤ 125°C; VIN - VOUT = 3V; IOUT = 6A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) LX8586-00/86A-00 (Adjustable) Parameter Reference Voltage Symbol VREF Test Conditions LX8586/86A-00 Min. Typ. Max. 1.238 1.225 1.250 1.250 0.035 0.1 0.01 83 55 0.2 1.1 0.9 2 8 0.25 0.3 0.003 1.262 1.275 0.2 0.5 0.02 Units V V % % %/W dB µA µA V V mA A % % % IOUT = 10mA, TA = 25°C 10mA ≤ IOUT ≤ 6A, 1.5V ≤ (VIN - VOUT), VIN ≤ 7V, P ≤ PMAX Line Regulation (Note 2) ∆VREF (VIN) IOUT = 10mA, 1.5V ≤ (VIN - VOUT ), VIN ≤ 7V Load Regulation (Note 2) ∆VREF (IOUT) VIN - V OUT = 3V, 10mA ≤ IOUT ≤ 6A ∆VOUT (Pwr) TA = 25°C, 20ms pulse Thermal Regulation Ripple Rejection (Note 3) VOUT = 3.3V, f =120Hz, COUT = 100µf Tantalum, VIN = 5V CADJ = 10µF, TA = 25°C, IOUT = 6A Adjust Pin Current I ADJ Adjust Pin Current Change ∆IADJ 10mA ≤ IOUT ≤ 6A, 1.5V ≤ (VIN - VOUT), VIN ≤ 7V Dropout Voltage LX8586-00 ∆V ∆VREF = 1%, IOUT = 6A LX8586A-00 ∆VREF = 1%, IOUT = 6A Minimum Load Current IOUT(MIN) VIN ≤ 7V Maximum Output Current IOUT(MAX) 1.4V ≤ (V IN - VOUT), VIN ≤ 7V Temperature Stability ∆VOUT (T) Long Term Stability ∆VOUT (t) TA = 125°C, 1000 hrs VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz RMS Output Noise (% of VOUT) 60 100 5 1.3 1.1 10 6.1 1 LX8586-33/86A-33 (3.3V Fixed) Parameter Output Voltage Symbol VOUT Test Conditions LX8586-33/86A-33 Min. Typ. Max. 3.267 3.235 3.3 3.3 1 2 5 0.01 83 4 1.1 0.9 8 0.25 0.3 0.003 3.333 3.365 6 10 15 0.02 10 1.3 1.1 Units V V mV mV mV %/W dB mA V V A % % % VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V ≤ V IN ≤ 10V, 0mA ≤ IOUT ≤ 6A, P ≤ PMAX Line Regulation (Note 2) ∆VOUT 4.75V ≤ V IN ≤ 7V (VIN ) 4.75V ≤ VIN ≤ 10V Load Regulation (Note 2) ∆VOUT (IOUT) VIN = 5V, 10mA ≤ IOUT ≤ IOUT (MAX) Thermal Regulation (Note 3) ∆VOUT (Pwr) TA = 25°C, 20ms pulse Ripple Rejection (Note 3) COUT = 100µF (Tantalum), IOUT = 6A, TA = 25°C Quiescent Current IQ 0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V Dropout Voltage LX8586-33 ∆V ∆VOUT = 1%, IOUT ≤ IOUT (MAX) LX8586A-33 ∆VOUT = 1%, IOUT ≤ IOUT (MAX) Maximum Output Current IOUT (MAX) VIN ≤ 7A Temperature Stability (Note 3) ∆VOUT (T) Long Term Stability (Note 3) ∆VOUT (t) TA = 125°C, 1000 hours RMS Output Noise (% of VOUT) (Note 3) VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz 65 6.1 1 Note 2. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 3. These parameters, although guaranteed, are not tested in production. Copyright © 1996 Rev. 1.0 12/96 3 PRODUCT DATABOOK 1996/1997 LX8586-xx/8586A-xx 6 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 P RODUCTION D ATA S HEET A P P L I C AT I O N N O T E S The LX8586/86A series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self-protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165°C. Use of an output capacitor is REQUIRED with the LX8586/86A series. Please see the table below for recommended minimum capacitor values. These regulators offer a more tightly controlled reference voltage tolerance and superior reference stability when measured against the older pin-compatible regulator types that they replace. STABILITY The output capacitor is part of the regulator’s frequency compensation system. Many types of capacitors are available, with different capacitance value tolerances, capacitance temperature coefficients, and equivalent series impedances. For all operating conditions, connection of a 220µF aluminum electrolytic capacitor or a 47µF solid tantalum capacitor between the output terminal and ground will guarantee stable operation. If a bypass capacitor is connected between the output voltage adjust (ADJ) pin and ground, ripple rejection will be improved (please see the section entitled “RIPPLE REJECTION”). When ADJ pin bypassing is used, the required output capacitor value increases. Output capacitor values of 220µF (aluminum) or 47µF (tantalum) provide for all cases of bypassing the ADJ pin. If an ADJ pin bypass capacitor is not used, smaller output capacitor values are adequate. The table below shows recommended minimum capacitance values for stable operation. RECOMMENDED CAPACITOR VALUES INPUT 10µF 10µF Power Supply IN LX8586/86A ADJ OUT Minumum Load (Larger resistor) Full Load (Smaller resistor) RDSON