LX8382A-00CV

LIN D O C # : 8382 LX8382-xx/8382A-xx 1 0 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 HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX8382/8382A series ICs are positive regulators designed to provide 10A output current. All internal circuitry is designed to operate down to a 1V input-to-output differential, so the LX8382/82A can operate with greater efficiency than previously available devices. The dropout voltage for each product is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.4V for the LX8382 and 1.2V for the LX8382A at maximum output current, decreasing at lower load currents. Fixed versions are also available and specified in the Available Options table below. The LX8382/82A have 1% initial voltage reference accuracy and 2% over line, load and temperature. The LX8382/82A series devices are pin-compatible with earlier 3-terminal regulators, such as the 117 series products. While a 10µF output capacitor is required on both input and output of these new devices, this capacitor is generally included in most regulator designs. The LX8382/82A series quiescent current flows into the load, thereby increasing efficiency. This feature contrasts with PNP regulators, where up to 10% of the output current is wasted as quiescent current. The LX8382/82A-xxC is specified over the commercial range of 0°C to +125°C. K E Y F E AT U R E S s THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE s GUARANTEED < 1.4V HEADROOM AT 10A (LX8382) s GUARANTEED < 1.2V HEADROOM AT 10A (LX8382A) s OUTPUT CURRENT OF 10A MINIMUM p 0.015% LINE REGULATION p 0.15% LOAD REGULATION s EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT A P P L I C AT I O N S s PENTIUM® PROCESSOR APPLICATIONS s POST REGULATORS FOR SWITCHING POWER SUPPLIES s BATTERY CHARGERS s CONSTANT CURRENT REGULATORS s CYRIX® 6x86TM s AMD-K6 TM s HIGH-CURRENT MICROPROCESSORS PRODUCT HIGHLIGHT 3.3V, 10A R E G U L AT O R A VA I L A B L E O P T I O N S VIN ≥ 4.75V 1500µF 6.3V 6MV1500GX from Sanyo PER PAR T # IN LX8382-xx ADJ OUT 121Ω 1% 3.1V at 10A 2x 330µF, 6.3V Oscon SA type from Sanyo -or3x 1500µF, 6.3V 6MV1500GX from Sanyo Part # LX8382/8382A-00 LX8382/8382A-33 Output Voltage Adjustable 3.3V Other voltage options may be available — Please contact factory for details. 178Ω 1% Application of the LX8382 for a high-current microprocessor (e.g. AMD-K6) with less than 130mV dynamic response to a 7.5A load transient. PA C K A G E O R D E R I N F O R M AT I O N TA (°C) 0 to 125 Dropout Voltage 1.4V 1.2V P Plastic TO-220 3-pin LX8382-xxCP LX8382A-xxCP V Plastic TO-247 3-terminal LX8382-xxCV LX8382A-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 © 1997 Rev. 1.0 8/97 11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LX8382-xx 1 0 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 V OUT 3 2 1 Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Maximum Output Current ........................................................................................... 10A Operating Junction Temperature Plastic (P & V 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 ON REVERSE SIDE IS VOUT 3 2 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 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. BLOCK D IA GR A M VIN Bias Circuit Thermal Limit Circuit Bandgap Circuit Control Circuit Output Circuit VOUT SOA Protection Circuit ADJ or GND* * This pin GND for fixed voltage versions. Current Limit Circuit 2 Copyright © 1997 Rev. 1.0 8/97 PRODUCT DATABOOK 1996/1997 LX8382-xx 1 0 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 ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8382/8382A-xxC with 0°C ≤ T A ≤ 125°C; VIN - VOUT = 3V; IOUT = 10A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) LX8382-00 (Adjustable) Parameter Reference Voltage (Note 4) Symbol VREF Test Conditions Min. 1.238 1.225 LX8382-00 Typ. Max. 1.250 1.250 0.015 0.15 0.3 0.01 83 55 0.2 1.2 1.1 2 12 0.25 0.3 0.003 1.262 1.270 0.2 0.4 0.5 0.02 Units V V % % % %/W dB µA µA V V mA A % % % IOUT = 10mA, TA = 25°C 10mA ≤ IOUT ≤ IOUT (MAX), 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX Line Regulation (Note 2) ∆ VREF (VIN) 1.5V ≤ (VIN - VOUT ), VIN ≤ 7V Load Regulation (Note 2) ∆V REF VOUT ≥ V REF, VIN - VOUT = 3V, 10mA ≤ IOUT ≤ 10A, TA = 25°C (IOUT) VIN - V OUT = 3V, 10mA ≤ IOUT ≤ 10A Thermal Regulation ∆VOUT (Pwr) TA = 25°C, 20ms pulse Ripple Rejection (Note 3) VOUT = 5V, f =120Hz, COUT = 100µf Tantalum, VIN = 6.5V CADJ = 10µF, TA = 25°C, IOUT = 10A Adjust Pin Current I ADJ Adjust Pin Current Change (Note 4) ∆ IADJ 10mA ≤ IOUT ≤ IOUT (MAX) , 1.5V ≤ (VIN - VOUT), VIN ≤ 10V Dropout Voltage LX8382-00 ∆V ∆VREF = 1%, IOUT = 10A LX8382A-00 ∆VREF = 1%, IOUT = 10A Minimum Load Current IOUT (MIN) VIN ≤ 10V (VIN - VOUT) ≤ 7V Maximum Output Current IOUT (MAX) 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 65 100 5 1.4 1.2 10 10 1 LX8382-33 (3.3V Fixed) Parameter Output Voltage (Note 4) Symbol VOUT Test Conditions Min. 3.267 3.235 LX8382-33 Typ. Max. 3.3 3.3 1 5 0.01 83 4 3.333 3.365 6 15 0.02 10 1.4 1.2 1 Units V V mV mV %/W dB mA V V A % % % VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V ≤ V IN ≤ 10V, 0mA ≤ IOUT ≤ 10A, P ≤ PMAX Line Regulation (Note 2) ∆VOUT (V IN) 4.75V ≤ V IN ≤ 7V Load Regulation (Note 2) ∆VOUT (IOUT) VIN = 5V, 0mA ≤ IOUT ≤ IOUT (MAX) Thermal Regulation ∆VOUT (Pwr) TA = 25°C, 20ms pulse Ripple Rejection (Note 3) COUT = 100µF (Tantalum), IOUT = 10A Quiescent Current IQ 0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V Dropout Voltage LX8382-33 ∆V ∆VOUT = 1%, IOUT ≤ IOUT (MAX) , VIN ≤ 7V LX8382A-33 ∆VOUT = 1%, IOUT ≤ IOUT (MAX) , VIN ≤ 7V Maximum Output Current IOUT (MAX) VIN ≤ 7V 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 60 10 12 0.25 0.3 0.003 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. Note 4. See Maximum Output Current Section above. Copyright © 1997 Rev. 1.0 8/97 3 PRODUCT DATABOOK 1996/1997 LX8382-xx 1 0 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 LX8382/8382A series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self-protection features expected of voltage regulators: 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 LX8382/82A 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 LX8382-xx /82A-xx ADJ OUT Minumum Load (Larger resistor) Full Load (Smaller resistor) RDSON