LX8384B-00CP

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 M I C R O S E M I LX8384x-xx 5A Low Dropout Positive Regulators C O M P A N Y P RODUCTION The LX8384/84A/84B Series ICs are positive regulators designed to provide 5A output current. These regulators yield higher efficiency than currently available devices with all internal circuitry designed to operate down to a 1V input-to-output differential. In each of these products, the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.3V (8384A) and 1.5V (8384) at maximum output current, decreasing at lower load currents. In addition, on-chip trimming adjusts the reference voltage tolerance to 1% maximum at room temperature and 2% maximum over the 0 to 125°C range for the LX8384A, making this ideal for the Pentium P54CVRE specification. The LX8384B offers 0.8% tolerance at room temperature and 1.0% maximum over line, load and temperature. Fixed versions are also available and specified in the Available Options table below. The LX8384/84A/84B Series devices are pin-compatible with earlier 3-terminal regulators, such as the 117 series products, but they do require input and output capacitors. A minimum 10µF capacitor is required on the input and a 15µF or greater on the output of these new devices for stability. Although, these capacitors are generally included in most regulator designs. The LX8384/84A/84B 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 LX8384-xxI is specified over the industrial temperature range of -25°C to 125°C, while the LX8384-xxC/84AxxC/84B-xxC is specified over the commercial range of 0°C to 125°C. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Three-Terminal Adjustable Or Fixed Output
Guaranteed < 1.3V Headroom a 5A (LX8384A)
Guaranteed 2.0% Max. Reference Tolerance (LX8384A)
Guaranteed 1.0% Max. Reference Tolerance (LX8384B)
0.015% Line Regulation
0.15% Load Regulation   W W W . Microsemi . COM  
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Pentium Processor VRE Application
High Efficiency Linear Regulators
Power Regulators For Switching



Power Supplies Battery Chargers Constant Current Regulators ® Cyrix 6x86™ AMD-K5™ 
    IN OUT 3.5V at 5A LX 8384A 5V + *1500µ F 6M V1500G X S an yo 121 Ω 0.1% AD J + 1500µ F 5x 6M V1500G X Sanyo 218 Ω 0.1%      LX8384/84A/84B-00 Adjustable LX8384/84A/84B-15 1.5V LX8384/84A/84B-33 3.3V Table 1 - Available Options * C apacitors must have < 20m Ω T otal E S R for the V R E Specification An Application of the LX8384A for the Pentium P54C Processors Meeting VRE Specification. LX8384X
     Max Ref Max Dropout Accuracy Voltage 0 to 125 2.0% 1.5V 2.0% 1.3V 1.0% 1.3V -25 to 125 2.0% 1.5V TA (°C) Plastic TO-252 (D-Pak) 3-Pin LX8384-xxCDT LX8384A-xxCDT LX8384B-xxCDT LX8384-xxIDT DT Plastic TO-220 3-Pin LX8384-xxCP LX8384A-xxCP LX8384B-xxCP LX8384-xxIP P Plastic TO-263 3-Pin LX8384-xxCDD LX8384A-xxCDD LX8384B-xxCDD LX8384-xxIDD DD Note: Available in Tape & Reel. Append the letter “T” to the part number. (i.e. LX8384-xxCPT) Copyright  2000 Rev. 2.1d, 2001-03-15 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 A
 M I C R O S E M I LX8384x-xx 5A Low Dropout Positive Regulators C O M P A N Y P RODUCTION     Power Dissipation....................................................................................Internally Limited Input Voltage .................................................................................................................10V Input to Output Voltage Differential..............................................................................10V Operating Junction Temperature Plastic (DT, DD, P Packages)................................................................................ 150°C Storage Temperature Range .......................................................................-65°C to 150 °C Lead Temperature (Soldering, 10 Seconds)............................................................... 300°C W W W . Microsemi . COM     
 TA B is V O U T 3 V IN 2 V OUT 1 AD J / GND* DD PACKAGE (3-PIN) (Top View) 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 specified terminal. TA B is V O UT V IN 3  
 2 DD Plastic TO-263 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT AD J/ G ND * 1 60°C/W 2.7°C/W DT PACKAGE (3-PIN) (Top View) TA B is V O U T P Plastic TO-220 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT V O UT 60°C/W 2.7°C/W 3 V IN 2 V OUT AD J / G N D* 1 DT Plastic TO-252 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT P PACKAGE (3-PIN) 60°C/W 2.7°C/W (Top View) *Pin 1 is GND for fixed voltage versions Junction Temperature Calculation: TJ = TA + (PD x θJT). The θJA & θJT numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.  
 V IN B ias C ircuit Bandgap C ircuit C ontrol C ircuit O utput C ircuit PACKAGE DATA Therm al Lim it C ircuit V O UT SO A Protection C ircuit A D J or GND* C urrent Lim it C ircuit *Pin 1 is GND for fixed voltage versions Copyright  2000 Rev. 2.1d, 2001-03-15 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 
 A M I C R O S E M I LX8384x-xx 5A Low Dropout Positive Regulators C O M P A N Y P RODUCTION Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8384x-xxC with 0°C ≤ TA ≤ 125°C and the LX8384-xxI with -25°C ≤ TA ≤ 125°C except where otherwise noted. Test conditions: VIN -VOUT = 3V; IOUT = 5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. Parameter
Symbol Min LX8384x-xx Typ Max Units LX8384-00 / 8384A-00 / 8384B-00 (ADJUSTABLE) Reference Voltage (Note 4) LX8384/84A-00 VREF LX8384B-00 Line Regulation (Note 2)
REF Load Regulation (Note 2)
REF Thermal Regulation
OUT (VIN) (IOUT) (Pwr) Adjust Pin Current LX8384-00 LX8384A/84B-00
ADJ
 Minimum Load Current IOUT(MIN) Maximum Output Current IOUT(MAX) Long Term Stability (Note 3)
OUT(t)
OUT(T) 1.238 1.250 1.262 V 1.225 1.250 1.270 V 1.240 1.250 1.260 V 1.238 1.250 1.262 V 0.015 0.2 % 1.3V < (VIN -VOUT), VIN < 10V, IOUT = 10mA VOUT > VREF, VIN - VOUT = 3V, 10mA < IOUT < 5A 0.035 0.3 % 0.15 0.5 % TA = 25°C, 20ms pulse 0.01 0.02 %/W IADJ Adjust Pin Current Change (Note 4) Dropout Voltage IOUT = 10mA, TA = 25°C 10mA < IOUT < 5A, 1.5V < (VIN -VOUT), VIN < 10V, P < PMAX IOUT = 10mA, TA = 25°C 10mA < IOUT < 5A, 1.5V < (VIN -VOUT), VIN < 10V, P < PMAX 1.3V < (VIN -VOUT), VIN < 7V, IOUT = 10mA VOUT = 5V, f= 120Hz, COUT = 100µF Tantalum, VIN = 6.5V, CADJ = 10µF, IOUT = 5A Ripple Rejection (Note 3)
Test Conditions 65 20 10mA < IOUT < IOUT(MAX), 1.3V < (VIN -VOUT), VIN