LX8384x-xx
TM ®
5A Low Dropout Positive Regulators
P RODUCTION D ATA S HEET
DESCRIPTION The LX8384/84A/84B Series ICs are available and specified in the Available positive regulators designed to provide 5A Options table below. The LX8384/84A/84B Series devices are output current. These regulators yield pin-compatible with earlier 3-terminal higher efficiency than currently available devices with all internal circuitry designed regulators, such as the 117 series products, to operate down to a 1V input-to-output but they do require input and output differential. In each of these products, the capacitors. A minimum 10µF capacitor is dropout voltage is fully specified as a required on the input and a 15µF or greater function of load current. Dropout is on the output of these new devices for guaranteed at a maximum of 1.3V (8384A) stability. Although, these capacitors are and 1.5V (8384) at maximum output generally included in most regulator designs. current, decreasing at lower load currents. The LX8384/84A/84B Series quiescent In addition, on-chip trimming adjusts the current flows into the load, thereby reference voltage tolerance to 1% maximum at room temperature and 2% maximum over increasing efficiency. This feature contrasts the 0 to 125°C range for the LX8384A, with PNP regulators where up to 10% of the making this ideal for the Pentium P54C- output current is wasted as quiescent VRE specification. The LX8384B offers current. The LX8384-xxI is specified over 0.8% tolerance at room temperature and the industrial temperature range of -25°C to 1.0% maximum over line, load and 125°C, while the LX8384-xxC/84Atemperature. Fixed versions are also xxC/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
KEY FEATURES
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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 APPLICATIONS Pentium® Processor VRE Application High Efficiency Linear Regulators Power Regulators For Switching Power Supplies Battery Chargers Constant Current Regulators Cyrix® 6x86™ AMD-K5™
PRODUCT HIGHLIGHT
5V
+ *1500µF 6MV1500GX Sanyo
IN
LX8384A
ADJ
OUT
121Ω 0.1% +
3.5V at 5A
P ART #
LX8384/84A/84B-00
O UTPUT V OLTAGE
Adjustable 1.5V 3.3V
1500µF 5x 6MV1500GX Sanyo
LX8384/84A/84B-15 LX8384/84A/84B-33
218Ω 0.1%
* Capacitors must have < 20mΩ Total ESR for the VRE Specification
Table 1 - Available Options
An Application of the LX8384A for the Pentium P54C Processors Meeting VRE Specification.
TA (°C)
PACKAGE ORDER INFO Plastic TO-220 Plastic TO-252 Max Ref Max Dropout DT (D-Pak) 3-Pin P 3-Pin Accuracy Voltage RoHS Compliant RoHS Compliant
Transition DC: 0532 Transition DC: 0543
LX8384X LX8384X
DD
Plastic TO-263 3-Pin
RoHS Compliant Transition DC: 0535
0 to 125 -25 to 125
Copyright © 2000 Rev. 2.1f, 2006-01-20
2.0% 2.0% 1.0% 2.0%
1.5V 1.3V 1.3V 1.5V
LX8384-xxCDT LX8384A-xxCDT LX8384B-xxCDT LX8384-xxIDT
LX8384-xxCP LX8384A-xxCP LX8384B-xxCP LX8384-xxIP
LX8384-xxCDD LX8384A-xxCDD LX8384B-xxCDD LX8384-xxIDD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8384-xxCP-TR)
Microsemi Inc.
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX8384x-xx
TM ®
5A Low Dropout Positive Regulators
P RODUCTION D ATA S HEET
ABSOLUTE MAXIMUM RATINGS(NOTE 1) Power Dissipation ................................................................................... Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential............................................................................. 10V Operating Junction Temperature................................................................................ 150°C Storage Temperature Range....................................................................... -65°C to 150 °C Peak Package Solder Reflow Temp. (40 seconds max. exposure) .................260°C (+0,-5)
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.
PACKAGE PIN OUT
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TAB is VOUT
3
VIN VOUT
ADJ / GND*
2 1
DD PACKAGE (3-PIN)
(Top View)
TAB is VOUT
3
VIN VOUT ADJ/ GND *
THERMAL DATA
2
DD
1
Plastic TO-263 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT Plastic TO-220 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT
60°C/W 2.7°C/W 60°C/W 2.7°C/W 60°C/W 2.7°C/W
DT PACKAGE (3-PIN)
(Top View)
P
TAB is VOUT
3
VIN VOUT ADJ GND
2
1
DT
Plastic TO-252 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT
P PACKAGE (3-PIN)
(Top View)
*Pin 1 is GND for fixed voltage versions
RoHS 100% Matte Tin Lead Finish
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. BLOCK DIAGRAM
VIN Bias Circuit Thermal Limit Circuit Bandgap Circuit Control Circuit Output Circuit SOA Protection Circuit ADJ or GND*
*Pin 1 is GND for fixed voltage versions
PACKAGE DATA PACKAGE DATA
VOUT
Current Limit Circuit
Copyright © 2000 Rev. 2.1f, 2006-01-20
Microsemi Inc.
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
LX8384x-xx
TM ®
5A Low Dropout Positive Regulators
P RODUCTION D ATA S HEET
ELECTRICAL CHARACTERISTICS
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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 Test Conditions LX8384x-xx Typ Max
1.250 1.250 1.250 1.250 0.015 0.035 0.15 0.01 65 20 10mA < IOUT < IOUT(MAX), 1.3V < (VIN -VOUT), VIN VREF, VIN - VOUT = 3V, 10mA < IOUT < 5A TA = 25°C, 20ms pulse VOUT = 5V, f= 120Hz, COUT = 100µF Tantalum, VIN = 6.5V, CADJ = 10µF, IOUT = 5A IADJ ΔIADJ ΔV IOUT(MIN) IOUT(MAX) ΔVOUT(t) LX8384-00 LX8384A/84B-00 Minimum Load Current Maximum Output Current Long Term Stability (Note 3) 1.238 1.225 1.240 1.238 V V V V % % % %/W dB µA µA V V mA A A % % %
Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Adjust Pin Current Adjust Pin Current Change (Note 4) Dropout Voltage
Temperature Stability (Note 3) ΔVOUT(T) RMS Output Noise (% of VOUT) ΔVOUT(RMS) TA = 25°C, 10Hz < f < 10kHz (Note 3) LX8384-15 / 8384A-15 / 8384B-15 (1.5V FIXED) Output Voltage (Note 4) LX8384/84A-15 VOUT LX8384B-15 ΔVOUT (VIN) ΔVOUT (IOUT) ΔVOUT (Pwr) IQ LX8384-15 LX8384A/84B-15 Copyright © 2000 Rev. 2.1f, 2006-01-20 ΔV VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V < VIN < 10V, 0mA < IOUT < 5A, P < PMAX VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V < VIN < 10V, 0A < IOUT < 5A, P < PMAX 4.75V < VIN < 7V 4.75V < VIN < 10V VIN = 5V, 0mA < IOUT < IOUT(MAX) TA = 25°C, 20ms pulse COUT = 100µF (Tantalum), IOUT = 5A 0mA < IOUT < IOUT(MAX), 4.75V < V < 10V ΔVOUT = 1%, IOUT < IOUT(MAX) ΔVOUT = 1%, IOUT < IOUT(MAX) 60 1.485 1.470 1.488 1.485
1.50 1.50 1.50 1.50 1 1 2.5 0.01 83 4 1.2 1
1.515 1.530 1.512 1.515 3 5 7 0.02
V V V V mV mV mV %/W dB
ELECTRICALS ELECTRICALS
Line Regulation (note 2) Load Regulation (note 2) Thermal Regulation Ripple Rejection (note 3) Quiescent Current Dropout Voltage
10 1.5 1.3
mA V V
Microsemi Inc.
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
LX8384x-xx
TM ®
5A Low Dropout Positive Regulators
P RODUCTION D ATA S HEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
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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 Test Conditions LX8384x-xx Typ Max
6 0.25 TA=125°C, 1000 hours TA=25°C, 10Hz < f < 10kHz 0.3 0.003 1
Min
5
Units
LX8384-15 / 8384A-15 / 8384B-15 (1.5V FIXED)(CONTINUED) Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT) (Note 3) IOUT(MAX) ΔVOUT(T) ΔVOUT (t) VOUT (RMS) VIN < 7V A % % %
LX8384-33 / 8384A-33 / 8384B-33 (3.3V FIXED) Output Voltage (Note 4) LX8384/84A-33 VOUT LX8384B-33 VIN=5V, IOUT=0mA, TA=25°C 4.75V < VIN < 10V, 0mA < IOUT < 5A, P < PMAX VIN=5V, IOUT=0mA, TA=25°C 4.75V < VIN < 10V, 0mA < IOUT < 5A, P < PMAX ΔVOUT(VIN) ΔVOUT (IOUT) ΔVOUT (Pwr) IQ LX8384-33 LX8384A/84B-33 Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT) (Note 3) ΔV IOUT(MAX) ΔVOUT (T) ΔVOUT (t) VOUT (RMS) TA=125°C, 1000 hours TA=25°C, 10Hz < f < 10kHz 4.75V < VIN < 7V 4.75V < VIN < 10V VIN=5V, 0mA < IOUT < IOUT(MAX) TA=25°C, 20ms pulse COUT=100µF (Tantalum), IOUT=5A 0mA < IOUT < IOUT(MAX), 4.75V < VIN < 10V ΔVOUT=1%, IOUT < IOUT(MAX) ΔVOUT=1%, IOUT < IOUT(MAX) VIN < 7V 5 60 3.267 3.235 3.274 3.267 3.30 3.30 3.30 3.30 1 2 5 0.01 83 4 1.2 1 6 0.25 0.3 0.003 1 10 1.5 1.3 3.333 3.365 3.326 3.333 6 10 15 0.02 V V V V mV mV mV %/W dB mA V V A % % %
Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Quiescent Current Dropout Voltage
Note 2 Note 3 Note 4
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. These parameters, although guaranteed are not tested in production. See Maximum Output Current Section
ELECTRICALS ELECTRICALS
Copyright © 2000 Rev. 2.1f, 2006-01-20
Microsemi Inc.
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
LX8384x-xx
TM ®
5A Low Dropout Positive Regulators
P RODUCTION D ATA S HEET
APPLICATION NOTES The LX8384/84A/84B Series ICs are easy to use LowDropout (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 LX8384/84A/84B 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 (
