Microsemi Corporation LX8384A-33CDD, LX8384A-15CP, LX8384A-15CDD, LX8384A-00CP, LX8384A-00CDD Datasheet
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LIN DOC #:
8384
LX8384-xx/8384A-xx/8384B-xx
5A LOW D
THE INFINITE POWER OF INNOVATION
DESCRIPTION KEY FEATURES
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 P54C-VRE specification.
The LX8384B offers 0.8% tolerance at
room temperature and 1.0% maximum
over line, load and temperature.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
3.5V, 5A REGULATOR
5V
*
1500µF
6MV1500GX
Sanyo
IN
LX8384A
ADJ
Fixed versions are also available and
specified in the Available Options table
below.
The LX8384/84A/84B Series devices
are pin-compatible with earlier 3terminal 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 LX8384/84A/84B Series quiescent
current flows into the load, thereby
increasing efficiency. This feature
constrasts 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/84A-xxC/84B-xxC is
specified over the commercial range of
0°C to 125°C.
OUT
121Ω
0.1%
3.5V at 5A
1500µF
*
5x 6MV1500GX
Sanyo
ROPOUT POSITIVE REGULATORS
P RODUCTION DATA SHEET
■ THREE-TERMINAL ADJUSTABLE OR FIXED
OUTPUT
■ GUARANTEED < 1.3V HEADROOM AT 5A
(LX8384A-xx)
■ GUARANTEED 2.0% MAX. REFERENCE
TOLERANCE (LX8384A-xx)
■ GUARANTEED 1.0% MAX. REFERENCE
TOLERANCE (LX8384B-xx)
■ OUTPUT CURRENT OF 5A MINIMUM
p 0.015% LINE REGULATION
p 0.15% LOAD REGULATION
APPLICATIONS
■ PENTIUM
■ HIGH EFFICIENCY LINEAR REGULATORS
■ POST REGULATORS FOR SWITCHING POWER
■ BATTERY CHARGERS
■ CONSTANT CURRENT REGULATORS
■ CYRIX
■ AMD-K5
AVAILABLE OPTIONS PER PART #
Part #
LX8384/84A/84B-00 Adjustable
LX8384/84A/84B-15 1.5V
LX8384/84A/84B-33 3.3V
Other voltage options may be available —
®
PROCESSOR VRE APPLICATIONS
SUPPLIES
®
TM
6x86
TM
Please contact factory for details.
Output
Voltage
218
0.1%
An application of the LX8384A for the Pentium P54C processors meeting VRE specfication.
PACKAGE ORDER INFORMATION
Max. Dropout
Voltage
Copyright © 1997
Rev. 1.9 12/97
(°C)
T
A
0 to 125 2.0% 1.3V LX8384A-xxCP LX8384A-xxCDD
-25 to 125 2.0% 1.5V LX8384-xxIP LX8384-xxIDD
Note: All surface-mount packages are available in Tape & Reel, append the letter "T" to part number.
Max. Ref.
Accuracy
2.0% 1.5V LX8384-xxCP LX8384-xxCDD
1.0% 1.3V LX8384B-xxCP LX8384B-xxCDD
(i.e. LX8384A-xxCDDT) "xx" refers to output voltage, please see table above.
L INFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
*
have < 20mΩ Total ESR.
Plastic TO-220
P
3-pin
Capacitors must
Ω
Plastic TO-263
DD
3-pin
1
PRODUCT DATABOOK 1996/1997
T
LX8384-xx/8384A-xx/8384B-xx
5A LOW D
P
ROPOUT POSITIVE REGULATORS
RODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
Power Dissipation .................................................................................. Internally Limited
Input Voltage................................................................................................................ 10V
Input to Output Voltage Differential ........................................................................... 10V
Operating Junction Temperature
Hermetic (K - Package) ........................................................................................ 150°C
Plastic (DD - 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.
THERMAL DATA
P PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θθ
θ
θθ
JT
θθ
θ
θθ
JA
DD PACKAGE:
= TA + (P
J
θθ
θ
θθ
JT
θθ
θ
θθ
JA
x θ
).
D
JA
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: T
numbers are guidelines for the thermal performance of the device/pc-board system.
The θ
JA
All of the above assume no ambient airflow.
can be improved with package soldered to 0.5IN2 copper area over backside ground
* θ
JA
plane or internal power plane. θ
mounting technique.
can vary from 20ºC/W to > 40ºC/W depending on
JA
2.7°C/W
60°C/W
2.7°C/W
60°C/W*
PACKAGE PIN OUTS
TAB IS V
OUT
3
2
1
P PACKAGE
* Pin 1 is GND for fixed voltage versions.
* Pin 1 is GND for fixed voltage versions.
(Top View)
TAB IS V
OUT
DD PACKAGE
(Top View)
3
2
1
V
IN
V
OUT
ADJ / GND*
V
IN
V
OUT
ADJ / GND*
V
IN
Circuit
ADJ or
GND*
* This pin GND for fixed voltage versions.
Bias
Thermal
Limit Circuit
BLOCK DIAGRAM
Bandgap
Circuit
Control
Circuit
Output
Circuit
SOA Protection
Circuit
Current
Limit Circuit
V
OU
2
Copyright © 1997
Rev. 1.9 12/97
PRODUCT DATABOOK 1996/1997
LX8384-xx/8384A-xx/8384B-xx
5A LOW D
ROPOUT POSITIVE REGULATORS
P RODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8384-xxC/8384A-xxC/8384B-xxC with
≤ 125°C, and the LX8384-xxI with -25°C ≤ TA ≤ 125°C; V
0°C ≤ T
A
maintains junction and case temperatures equal to the ambient temperature.)
LX8384-00 / 8384A-00 / 8384B-00 (Adjustable)
Parameter
Reference Voltage LX8384/84A-00 V
(Note 4) 10mA ≤ I
LX8384B-00 I
Line Regulation (Note 2) ∆V
Load Regulation (Note 2)
Thermal Regulation
Ripple Rejection (Note 3) V
Adjust Pin Current I
Adjust Pin Current Change (Note 4) ∆I
Dropout Voltage LX8384-00 ∆V ∆V
LX8384A/84B-00 ∆V
Minimum Load Current I
Maximum Output Current I
Temperature Stability (Note 3) ∆V
Long Term Stability (Note 3) ∆V
RMS Output Noise (% of V
) (Note 3) V
OUT
Symbol
REFIOUT
(V
IN
∆V
REF(IOUT
∆V
(Pwr)
OUT
ADJ
ADJ
OUT (MIN)VIN
OUT (MAX)(VIN
OUT
OUT
OUT (RMS)TA
= 10mA, TA = 25°C
= 10mA, TA = 25°C
OUT
10mA ≤ I
1.3V ≤ (V
REF
)
1.3V ≤ (V
)
V
≥ V
OUT
TA = 25°C, 20ms pulse
= 5V, f =120Hz, C
OUT
C
= 10µF, I
ADJ
10mA ≤ I
= 1%, I
REF
= 1%, I
REF
≤ 10V
- V
(VIN - V
(T)
(t) TA = 125°C, 1000 hours
= 25°C, 10Hz ≤ f ≤ 10kHz
- V
IN
≤ 5A, 1.5V ≤ (V
OUT
≤ 5A, 1.5V ≤ (V
OUT
- V
IN
OUT
- V
IN
OUT
, VIN - V
REF
OUT
≤ I
OUT
OUT (MAX)
= 5A
OUT
= 5A
OUT
) ≤ 7V
OUT
) ≤ 10V
OUT
= 3V; I
OUT
Test Conditions Units
= 5A. Low duty cycle pulse testing techniques are used which
OUT
LX8384/84A/84B-00
Min. Typ. Max.
1.238 1.250 1.262 V
- V
), V
OUT
≤ 10V, P ≤ P
IN
MAX
IN
1.225 1.250 1.270 V
1.240 1.250 1.260 V
- V
), V
), V
≤ 7V, I
IN
), V
≤ 10V, I
IN
= 3V, 10mA ≤ I
OUT
IN
= 10mA
OUT
OUT
OUT
IN
= 10mA
≤ 5A
OUT
≤ 10V, P ≤ P
MAX
1.238 1.250 1.262 V
0.015 0.2 %
0.035 0.3 %
0.15 0.5 %
0.01 0.02 %/W
= 100µf Tantalum, VIN = 6.5V
OUT
65 83 dB
= 5A
20 55 100 µA
, 1.3V ≤ (V
- V
), V
OUT
≤ 10V
IN
IN
0.2 5 µA
1.2 1.5 V
1.1 1.3 V
210mA
56 A
34 A
0.25 %
0.3 1 %
0.003 %
LX8384-15 / 8384A-15 / 8384B-15 (1.5V Fixed)
Parameter
Output Voltage LX8384/84A-15 V
(Note 4) 4.75V ≤ V
LX8384B-15 VIN = 5V, I
Line Regulation (Note 2) ∆V
Load Regulation (Note 2)
Thermal Regulation
Ripple Rejection (Note 3) C
Quiescent Current I
Dropout Voltage LX8384-15 ∆V ∆V
LX8384A/84B-15 ∆V
Maximum Output Current I
Temperature Stability (Note 3) ∆V
Long Term Stability (Note 3) ∆V
RMS Output Noise (% of V
) (Note 3) V
OUT
Symbol
OUTVIN
(V
∆V
OUT(IOUT
∆V
OUT
OUT (MAX)VIN
OUT
OUT
OUT (RMS)TA
= 5V, I
4.75V ≤ VIN ≤ 10V, 0mA ≤ I
4.75V ≤ VIN ≤ 7V
OUT
)
4.75V ≤ V
IN
)
V
= 5V, 0mA ≤ I
IN
(Pwr)
TA = 25°C, 20ms pulse
= 100µF (Tantalum), I
OUT
0mA ≤ I
Q
= 1%, I
OUT
= 1%, I
OUT
OUT
≤ 7V
(T)
(t) TA = 125°C, 1000 hours
= 25°C, 10Hz ≤ f ≤ 10kHz
Test Conditions Units
= 0mA, TA = 25°C
OUT
≤ 10V, 0mA ≤ I
IN
= 0mA, TA = 25°C
OUT
≤ 10V
IN
≤ I
≤ I
OUT
OUT (MAX)
, 4.75V ≤ VIN ≤ 10V
OUT (MAX)
≤ I
OUT
OUT (MAX)
≤ I
OUT
OUT (MAX)
≤ 5A, P ≤ P
OUT
≤ 5A, P ≤ P
OUT
= 5A
OUT
MAX
MAX
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.
LX8384/84A/84B-15
Min. Typ. Max.
1.485 1.50 1.515 V
1.470 1.50 1.530 V
1.488 1.50 1.512 V
1.485 1.50 1.515 V
13mV
15mV
2.5 7 mV
0.01 0.02 % / W
60 83 dB
410mA
1.2 1.5 V
1 1.3 V
56 A
0.25 %
0.3 1 %
0.003 %
Copyright © 1997
Rev. 1.9 12/97
3
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