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LX8384-15CDD

P1-P3P4-P6P7-P9P10-P11
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright 2000
Rev. 2.1d, 2001-03-15
WWW.
Microsemi
.
COM
LX8384x-xx
5A Low Dropout Positive Regulators
P
R
O
D
UC
TI
O
N
A MICROSEMI COMPANY

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. 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/84A-
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
*1500µF
6MV1500GX
Sanyo
LX8384A
121
Ω
0.1%
218
Ω
0.1%
IN
ADJ
OUT
5V
3.5V
at 5A
1500µF
5x 6MV1500GX
Sanyo
+
+
* Capacitors must have < 20m
Ω
Total ESR for the VRE Specification
An Application of the LX8384A for the Pentium P54C Processors Meeting VRE Specification.
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
Pentium
®
Processor VRE
Application
High Efficiency Linear
Regulators
Power Regulators For Switching
Power Supplies
Battery Chargers
Constant Current Regulators
Cyrix
®
6x86™
AMD-K5™
LX8384/84A/84B-00 Adjustable
LX8384/84A/84B-15 1.5V
LX8384/84A/84B-33 3.3V
Table 1
- Available Options
T
A
(
°
C)
Max Ref
Accuracy
Max Dropout
Voltage
DT
Plastic TO-252
(D-Pak) 3-Pin
P
Plastic TO-220
3-Pin
DD
Plastic TO-263
3-Pin
0 to 125 2.0% 1.5V LX8384-xxCDT LX8384-xxCP LX8384-xxCDD
2.0% 1.3V LX8384A-xxCDT LX8384A-xxCP LX8384A-xxCDD
1.0% 1.3V LX8384B-xxCDT LX8384B-xxCP LX8384B-xxCDD
-25 to 125 2.0% 1.5V LX8384-xxIDT LX8384-xxIP LX8384-xxIDD
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8384-xxCPT)
L
L
X
X
8
8
3
3
8
8
4
4
X
X
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright 2000
Rev. 2.1d, 2001-03-15
WWW.
Microsemi
.
COM
LX8384x-xx
5A Low Dropout Positive Regulators
P
R
O
D
UC
TI
O
N
A MICROSEMI COMPANY

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
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.
DD
Plastic TO-263 3-Pin
THERMAL RESISTANCE
-
JUNCTION TO
A
MBIENT
,
θ
JA
60
°
C/W
THERMAL RESISTANCE
-
JUNCTION TO
T
AB
,
θ
JT
2.7°C/W
P
Plastic TO-220 3-Pin
THERMAL RESISTANCE
-
JUNCTION TO
A
MBIENT
,
θ
JA
60
°
C/W
THERMAL RESISTANCE
-
JUNCTION TO
T
AB
,
θ
JT
2.7°C/W
DT
Plastic TO-252 3-Pin
THERMAL RESISTANCE
-
JUNCTION TO
A
MBIENT
,
θ
JA
60
°
C/W
THERMAL RESISTANCE
-
JUNCTION TO
T
AB
,
θ
JT
2.7°C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JT
).
The
θ
JA
&
θ
JT
numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
1
V
IN
ADJ /
GND*
V
OUT
2
3
TAB is V
OUT
DD P
ACKAGE
(3-
PIN
)
(Top View)
V
IN
V
OUT
ADJ/
GND*
TAB is V
OUT
3
2
1
DT P
ACKAGE
(3-
PIN
)
(Top View)
TAB is V
OUT
ADJ /
GND*
V
OUT
V
IN
1
2
3
P
P
ACKAGE
(3-
PIN
)
(Top View)
*
Pin 1 is GND for fixed voltage versions
Thermal
Limit Circuit
Bias Circuit
Bandgap
Circuit
Control
Circuit
Output
Circuit
SOA
Protection
Circuit
Current
Limit Circuit
V
IN
ADJ or
GND*
V
OUT
*
Pin 1 is GND for fixed voltage versions
P
P
A
A
C
C
K
K
A
A
G
G
E
E
D
D
A
A
T
T
A
A
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page
3
Copyright 2000
Rev. 2.1d, 2001-03-15
WWW.
Microsemi
.
COM
LX8384x-xx
5A Low Dropout Positive Regulators
P
R
O
D
UC
TI
O
N
A MICROSEMI COMPANY

Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8384x-xxC with
0
°
C
≤
T
A
≤
125
°
C and the LX8384-xxI with -25
°
C
≤
T
A
≤
125
°
C except where otherwise noted. Test conditions: V
IN
-V
OUT
= 3V;
I
OUT
= 5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient
temperature.
LX8384x-xx
Parameter Symbol Test Conditions
Min Typ Max
Units
LX8384-00 / 8384A-00 / 8384B-00 (ADJUSTABLE)
I
OUT
= 10mA, T
A
= 25°C 1.238 1.250 1.262 V
10mA < I
OUT
< 5A, 1.5V < (V
IN
-V
OUT
),
V
IN
< 10V, P < P
MAX
1.225 1.250 1.270 V
I
OUT
= 10mA, T
A
= 25°C 1.240 1.250 1.260 V
Reference Voltage LX8384/84A-00
(Note 4)
LX8384B-00
V
REF
10mA <
I
OUT
< 5A, 1.5V < (V
IN
-V
OUT
),
V
IN
< 10V, P < P
MAX
1.238 1.250 1.262 V
1.3V < (V
IN
-V
OUT
), V
IN
< 7V, I
OUT
= 10mA 0.015 0.2 %
Line Regulation (Note 2)
REF
(V
IN
)
1.3V <
(V
IN
-V
OUT
), V
IN
< 10V, I
OUT
= 10mA 0.035 0.3 %
Load Regulation (Note 2)
REF
(I
OUT
)
V
OUT
> V
REF
, V
IN
- V
OUT
= 3V,
10mA <
I
OUT
< 5A
0.15 0.5 %
Thermal Regulation
OUT
(Pwr)
T
A
= 25°C, 20ms pulse 0.01 0.02 % / W
Ripple Rejection (Note 3)
V
OUT
= 5V, f= 120Hz, C
OUT
= 100µF Tantalum,
V
IN
= 6.5V, C
ADJ
= 10µF, I
OUT
= 5A
65 83 dB
Adjust Pin Current I
ADJ
20 55 100 µA
Adjust Pin Current Change (Note 4)
ADJ
10mA < I
OUT
< I
OUT(MAX)
, 1.3V < (V
IN
-V
OUT
), V
IN
<10V 0.2 5 µA
REF
= 1%, I
OUT
= 5A 1.2 1.5 V
Dropout Voltage LX8384-00
LX8384A/84B-00
REF
= 1%, I
OUT
= 5A 1.1 1.3 V
Minimum Load Current I
OUT(MIN)
V
IN
< 10V 2 10 mA
(V
IN
- V
OUT
) < 7V 5 6 A
Maximum Output Current I
OUT(MAX)
(V
IN
- V
OUT
) < 10V 3 4 A
Long Term Stability (Note 3)
OUT
(t) T
A
= 125°C, 1000 hours 0.3 1 %
Temperature Stbility (Note 3)
OUT
(T) 0.25 %
RMS Output Noise (% of V
OUT
)
(Note 3)
OUT(RMS)
T
A
= 25°C, 10Hz < f < 10kHz 0.003 %
LX8384-15 / 8384A-15 / 8384B-15 (1.5V FIXED)
V
IN
= 5V, I
OUT
= 0mA, T
A
= 25°C 1.485 1.50 1.515 V
4.75V < V
IN
< 10V, 0mA < I
OUT
< 5A, P < P
MAX
1.470 1.50 1.530 V
V
IN
= 5V, I
OUT
= 0mA, T
A
= 25°C 1.488 1.50 1.512 V
Output Voltage LX8384/84A-15
(Note 4)
LX8384B-15
V
OUT
4.75V <
V
IN
< 10V, 0A < I
OUT
< 5A, P < P
MAX
1.485 1.50 1.515 V
4.75V < V
IN
< 7V 1 3 mV
Line Regulation (note 2)
OUT
(V
IN
)
4.75V <
V
IN
< 10V 1 5 mV
Load Regulation (note 2)
OUT
(I
OUT
)
V
IN
= 5V, 0mA < I
OUT
< I
OUT(MAX)
2.5 7 mV
Thermal Regulation
OUT
(Pwr)
T
A
= 25°C, 20ms pulse 0.01 0.02 % / W
Ripple Rejection (note 3) C
OUT
= 100µF (Tantalum), I
OUT
= 5A 60 83 dB
Quiescent Current I
Q
0mA < I
OUT
< I
OUT(MAX)
, 4.75V < V < 10V 4 10 mA
OUT
= 1%, I
OUT
< I
OUT(MAX)
1.2 1.5 V
Dropout Voltage LX8384-15
LX8384A/84B-15
OUT
= 1%, I
OUT
< I
OUT(MAX)
1 1.3 V
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
P1-P3P4-P6P7-P9P10-P11

LX8384-15CDD

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