Microsemi LX8630-25CDD 3a bicmos very low dropout regulator Datasheet

A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
Shut device will enter shutdown mode when the
SHDN pin is pulled low.
Thermal and Short-Circuit Current
Limiting: the LX8630 limits the current
when the output is shorted, protecting the
sensitive load circuits. The device will
also turn off if the junction temperature
exceeds 150°
Available in Popular TO-220 and
TO-263 Power Packages: adjustable
versions have five leads, and fixed output
voltage devices are supplied in three lead
packages.
Dropout Voltage Typically
450mV at 3A and 50mV at
10mA
Low Quiescent Current,
Typically Under 400µA,
irrespective of Load
Shutdown Current 10µA
Adjustable Output Version in
5-Pin TO-220 & TO-263
Packages
Low Reverse Leakage
Current
Short-Circuit and Thermal
Shutdown Protection
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
W W W . Microsemi . COM
The LX8630 family are positive very
They are
low dropout regulators.
designed to provide a power supply for
very low headroom applications, such as
3.3V – 2.5V.
BiCMOS technology allows an
effective series pass element resistance,
RDS(ON) of 150m dropout voltage of 450mV at 3A.
Low Quiescent Current and LogicControlled Shutdown help conserve
battery life and increase system efficiency.
Typical quiescent current is under 400A
irrespective of load current, while the
3.3V & 2.5V Supplies for
Memory, Microprocessors,
Clock Circuits, Etc.
Portable Equipment
LX8 630-xx S im plified B lock D iagra m
V O UT
V IN
C urrent
Lim it
R eference
C urrent
RA
C harge
P um p
A D J*
1.25V
+
RB
-
SHDN*
GND
V IN /2
RB
RA
T herm al
S hutdown
LX 8630-00
-
-
LX 8630-25
25K
25K
LX 8630-33
41K
25K
* Adjustable 5 lead ve rsion only
Output
TA (°C)
Voltage
3.3
0 to 125
2.5
ADJ(00)
Plastic TO-220
P 3-Pin
LX8630-33CP
LX8630-25CP
-
Plastic TO-220
P 5-Pin
LX8630-00CP
Plastic TO-263
3-Pin
LX8630-33CDD
LX8630-25CDD
-
DD
Plastic TO-263
5-Pin
LX8630-00CDD
DD
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8630-33CDDT)
Copyright  2000
Rev. 1.0a,2000-11-28
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LX8630-XX
R everse
V oltage
Sense
A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
Input Voltage (VIN) ......................................................................................................6.5V
SHDN Pin..............................................................................................-0.3V to VIN +0.3V
Operating Junction Temperature
Plastic (P & DD Packages)................................................................................... 150°C
Storage Temperature Range ........................................................................-65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................... 300°C
Note:
TAB is GND
3
VOUT
2
GND
1
VIN
DD PACKAGE (3-PIN)
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.
W W W . Microsemi . COM
(Top View)
T A B is G N D
P
PLASTIC TO-220 3-PIN
THERMAL RESISTANCE-JUNCTION TO TAB , θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
2.1°C/W
60°C/W
5
V OUT
4
ADJ
3
GND
2
SHDN
1
V IN
D D P A C K A G E (5-P IN )
(T op V iew)
P
PLASTIC TO-220 5-PIN
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
2.1°C/W
60°C/W
T A B is G N D
DD
PLASTIC TO-263 3-PIN
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
2.1°C/W
60°C/W
5
VOUT
4
ADJ
3
GND
2
SHDN
V IN
1
P P A C K A G E (5-P IN )
(Top V iew)
DD PLASTIC TO-263 5-PIN
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
2.1°C/W
60°C/W
TAB is GND
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow.
•
θJA can be improved with package soldered to 0.5IN2 copper area over backside
ground plane or internal power plane. θJA can vary from 20°C/W to > 40°C/W
depending on mounting technique. See table below for thermal resistance
guidelines:
Copper Area
(Backside)*
Board Area
2.5 sq” (1613mm2)
1.0 sq” (645 mm2)
0.17 sq” (110 mm2)
2.5 sq” (1613mm2)
2.5 sq” (1613mm2)
2.5 sq” (1613mm2)
2.5 sq” (1613mm2)
2.5 sq” (1613mm2)
2.5 sq” (1613mm2)
VOUT
2
GND
1
VIN
P PACKAGE (3-PIN)
(Top View)
Thermal
Resistance
(θJA)
PACKAGE DATA
Copper Area
(Topside)*
3
25°C/W
27°C/W
35°C/W
*Tab of device attached to topside copper
Copyright  2000
Rev. 1.0a,2000-11-28
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
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
Positive supply input for the regulator. Bypass to GND with at
source is further than 1 inch from the device.
VIN
VOUT
!"#
$%
&
regulation, rather it is needed for transient response. Size your output capacitor to meet the transient loading
requirement. If you have a very dynamic load, a larger capacitor will improve the response to these load steps.
GND
Reference ground. The input and output bypass capacitors should be connected to this pin. The tab on the TO220 and TO-263 packages along with the ground pin are also used for heatsinking the device.
ADJ
Feedback pin for the regulator. For the LX8630-00, the output voltage can be set by two external resistors with
the following relationship: VOUT = 1.25V * (1+RA/RB) where RA is the resistor connected between VOUT and ADJ,
RB is the resistor connected between ADJ and GND pin.
SHDN
Shutdown pin. For the LX8630-00, this pin has a threshold of about V IN/2, it should be actively pulled high to
enable the regulator. This can be accomplished with a resistive pull-up. When low, it turns off the regulator and
puts the device in a low current shutdown state.
W W W . Microsemi . COM
LX8630-xx
V IN
1
IN
OUT
V OUT
5
LX 8630-00
C IN
SHDN
2
GND
ADJ
RA
4
C OUT
3
V REF
RB

RA 

RB 
FIGURE 1
Copyright  2000
Rev. 1.0a,2000-11-28

PIN DESCRIPTION
V OUT = V REF 1 +
– Typical Application
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
PARAMETER
SYMBOL
MIN.
VIN
3.0
5.5
V
0.01
3
A
INPUT VOLTAGE
LOAD CURRENT (WITH ADEQUATE HEATSINKING)
TYP.
INPUT CAPACITOR (VIN TO GND)
10
100
OUTPUT CAPACITOR (VOUT TO GND)
22
220*
MAX.
UNITS
* Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a larger capacitor will improve
the response to these load steps (see charts 2&3)
W W W . Microsemi . COM
(Unless otherwise specified, the following specifications apply over the operating ambient temperatures for the LX8630-xxC with 0°C ≤
TA ≤ 125°C; VIN = VOUT + 1.5V; IOUT = 10mA; CIN = 10 ' (OUT ) ' *J = TA. Test conditions: Low duty cycle pulse testing
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Test Conditions
Min
LX8630-xx
Typ
Max
Units
LX8630-33 FIXED 3.3V, 3A
Output Voltage
VOUT
Line Regulation
VREG
Load Regulation
IREG
Dropout Voltage (VDO = VIN - VOUT)
VDO
TJ = 25°C
3.25
Over Temperature
3.22
VIN = 3.9V to 5.5V
3.35
3.38
2
mV
mV
18
40
0.4
0.6
IOUT = 1.5A, OUT = -1%
0.3
0.4
IOUT = 10mA, OUT = -1%
0.05
0.15
ISC
VOUT = 0V
IQ
IOUT = 10mA to 3A
0V < VIN < VOUT, VOUT < 3.4V (at VOUT)
V
8
IOUT = 10mA to 3 A
Quiescent Current
IREV
3.3
IOUT = 3A, OUT = -1%
Short Circuit Current
Reverse Leakage Current
Symbol
V
5
6.5
A
400
600
-50
50
0
650
0V < VIN < VOUT, VOUT < 3.4V (at VIN)
TJ = 25°C
2.46
2.5
2.54
Over Temperature
2.44
2.5
2.56
mA
LX8630-25 FIXED 2.5V, 3A
Output Voltage
VOUT
V
VREG
VIN = 3.1V to 5.5V
2
6
mV
Load Regulation
IREG
IOUT = 10mA to 3 A
14
30
mV
IOUT = 3A, OUT = -1%, TJ = 85°C
0.4
0.6
IOUT = 1.5A, OUT = -1%
0.3
0.45
IOUT = 10mA, OUT = -1%
0.05
0.15
Dropout Voltage (VDO = VIN - VOUT)
VDO
Short Circuit Current
ISC
VOUT = 0V
Quiescent Current
IQ
IOUT = 10mA to 3A
Reverse Leakage Current
Copyright  2000
Rev. 1.0a,2000-11-28
IREV
0V < VIN < VOUT, VOUT < 2.6V (at VOUT)
0V < VIN < VOUT, VOUT < 2.6V (at VIN)
-50
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
V
5
6.5
A
400
600
50
0
650
mA
Page 4
ELECTRICALS
Line Regulation
A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
Parameter
Symbol
LX8630-xx
Min
Typ Max
Test Conditions
Units
LX8630-00 ADJUSTABLE OUTPUT, 3A
TJ = 25°C
1.23
1.25
1.27
Over Temperature
1.22
1.25
1.28
Reference Voltage
VREF
Line Regulation
VREG
VIN = (VO + 0.6V) to 5.5V @ ADJ Pin (Note 1)
2
4
mV
Load Regulation
IREG
IOUT = 10mA to 3A @ ADJ Pin
7
15
mV
Dropout Voltage
VDO
Short Circuit Current
ISC
Quiescent Current
IOUT = 3A, OUT = -1%, TJ = 85°C
0.4
0.6
IOUT = 1.5A, OUT = -1%
0.3
0.45
IOUT = 10mA, OUT = -1%
0.05
0.15
5
6.5
400
600
1
40
50
650
VOUT = 0V
IOUT = 10mA to 3A
IQ
VIN= 4.8V; VSHDN<0.8V
Quiescent Current in Shutdown
Reverse Leakage Current
IREV
Bias Current at ADJ Pin
0V < VIN < VOUT, VOUT < 5.5V (at VOUT)
VSHDN
SHDN Bias Current
ISHDN
Note 1: VIN min.
V
A
0V < VIN < VOUT, VOUT < 5.5V (at VIN)
-50
0
mA
100
nA
VSHDN falling
VSHDN rising
0.8
(VIN/2)
IBIAS
Shutdown Threshold
V
(VIN/2)
VSHDN < 0.8V
VSHDN = 3V
-2
-1
W W W . Microsemi . COM
V
300
200
+125
150
+25
-25
ELECTRICALS
V-Dropout (mV)
250
100
50
0
0.1
0.5
1.0
1.5
2.0
2.5
3.0
Current Load (Amps)
CHART 1 – Dropout Voltage vs. Output Current (Typical – LX8630-33CCD)
Copyright  2000
Rev. 1.0a,2000-11-28
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
A
M I C R O S E M I
C O M P A N Y
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
P RODUCTION D ATA S HEET
W W W . Microsemi . COM
VIN= 3.3V
CHAN 1 (TOP TRACE): VOUT 50mV/DIV at 2.5VDC
CHAN 3 (LOWER TRACE): I OUT 1A/DIV with
10mA preload current
Input Cap: 1 6MVGX 1500µF Sanyo Cap
Output Caps: 2 6MVGX 1500µF Sanyo Cap
VIN= 5.0V
CHAN 1 (TOP TRACE): VOUT 50mV/DIV at 2.5VDC
CHAN 3 (LOWER TRACE): I OUT 1A/DIV with
10mA preload current
Input Cap: 1 6MVGX 1500µF Sanyo Cap
Output Caps: 2 6MVGX 1500µF Sanyo Cap
GRAPHS
CHART 2 & 3 – LX8630-00CCD Transient Response
Note: Adjustable Resistors 10K Ohms Each
Copyright  2000
Rev. 1.0a,2000-11-28
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
DD
W W W . Microsemi . COM
3-Pin Plastic TO-263
I
A
D
Dim
C
A
B
C
D
E
F
G
H
I
J
K
M
N
B
K
M
N
H
F
E
G
0 ° -8 °
MILLIMETERS
MIN
MAX
10.03
10.67
8.51
9.17
4.19
4.59
1.14
1.40
0.330
0.51
1.19
1.34
2.41
2.66
2.29
2.79
–
1.65
0
0.25
14.60
15.87
7°
3°
INCHES
MIN
MAX
0.395
0.420
0.335
0.361
0.165
0.181
0.045
0.055
0.013
0.020
0.047
0.053
0.095
0.104
0.090
0.110
–
0.065
0
0.010
0.575
0.625
7°
3°
MILLIMETERS
MIN
MAX
10.03
10.67
8.51
9.17
4.19
4.59
1.14
1.40
0.330
0.51
0.74
0.89
1.57
1.83
2.29
2.79
–
1.65
0
0.25
14.60
15.87
7°
3°
INCHES
MIN
MAX
0.395
0.420
0.335
0.361
0.165
0.181
0.045
0.055
0.013
0.020
0.029
0.035
0.062
0.072
0.090
0.110
–
0.065
0
0.010
0.575
0.625
7°
3°
J
S e a tin g P la n e
DD
5-Pin Plastic TO-263
I
A
D
Dim
C
B
K
M
N
F
0° -8°
E
G
Note:
J
1.
S e a tin g P la n e
Copyright  2000
Rev. 1.0a,2000-11-28
MECHANICALS
H
A
B
C
D
E
F
G
H
I
J
K
M
N
Dimensions do not include mold flash or
protrusions; these shall not exceed 0.155mm(.006”)
on any side. Lead dimension shall not include
solder coverage.
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
A
M I C R O S E M I
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
C O M P A N Y
P RODUCTION D ATA S HEET
P
W W W . Microsemi . COM
3-Pin Plastic TO-220
B
S
Dim
F
T
Q
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
U
A
C
1
2
3
R
H
K
D
L
J
MILLIMETERS
MIN
MAX
14.22
15.88
9.65
10.67
3.56
4.83
0.51
1.14
3.53
4.09
2.54 BSC
6.35
0.30
1.14
12.70
14.73
1.14
1.27
5.08 TYP
2.54
3.05
2.03
2.92
1.14
1.40
5.84
6.86
0.508
1.14
INCHES
MIN
MAX
0.560
0.625
0.380
0.420
0.140
0.190
0.020
0.045
0.139
0.161
0.100 BSC
0.250
0.012
0.045
0.500
0.580
0.045
0.050
0.200 TYP
0.100
0.120
0.080
0.115
0.045
0.055
0.230
0.270
0.020
0.045
MILLIMETERS
MIN
MAX
14.23
16.51
9.66
10.66
3.56
4.82
0.46
0.89
3.56
4.06
3.40
0.31
1.14
12.70
14.73
6.80 TYP
2.04
2.92
1.14
1.39
5.85
6.85
INCHES
MIN
MAX
0.560
0.650
0.380
0.420
0.140
0.190
0.018
0.035
0.140
0.160
0.134
0.012
0.045
0.500
0.580
0.268 TYP
0.080
0.115
0.045
0.055
0.230
0.270
G
N
P
5-Pin Plastic TO-220
B
S
Dim
F
T
A
1
C
5
R
K
D
Note:
J
1.
G
N
Copyright  2000
Rev. 1.0a,2000-11-28
MECHANICALS
A
B
C
D
F
G
J
K
N
R
S
T
Dimensions do not include mold flash or
protrusions; these shall not exceed 0.155mm(.006”)
on any side. Lead dimension shall not include
solder coverage.
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
A
M I C R O S E M I
C O M P A N Y
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
P RODUCTION D ATA S HEET
W W W . Microsemi . COM
NOTES
PRODUCTION DATA – Information contained in this document is proprietary to LinFinity and
is current as of publication date. This document may not be modified in any way without the
express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. LinFinity reserves the right to change the configuration and performance of the
product and to discontinue product at any time.
Copyright  2000
Rev. 1.0a,2000-11-28
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
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