LX8117-xx / 8117A-xx / 8117B-xx
0.8, 1 & 1.2A L
OW
D
ROPOUT
P
OSITIVE
R
EGULATORS
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O V A T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
The LX8117/8117A/8117B series are positive
differential voltages down to 1V.
Low Dropout (LDO) regulators. At the designed
Most regulator circuit designs include output
maximum load current, the LX8117 series
capacitors with values in the range of tens to
dropout voltage is guaranteed to be 1.2V or hundreds of microfarads or more. The
lower at 0.8A (LX8117A 1.3V @ 1A). The
LX8117/17A/17B typically requires at least
dropout voltage decreases with load current.
10µF of output capacitance for stable operation.
An adjustable output voltage version of the
PNP-type regulators can waste current equal
LX8117/17A/17B is available, as well as to as much as 10 percent of their output as a
versions with fixed outputs of 2.5V, 2.85V, 3.3V quiescent current which flows directly to
and 5V. The 2.85V version is specifically ground, bypassing the load. Quiescent current
designed for use as a component of active
from the LX8117/17A/17B flows through the
termination networks for the SCSI bus. On-chip load, increasing power-use efficiency and
trimming of the internal voltage reference allows
allowing cooler operation.
specification of the initial output voltage to
The LX8117 is available in low-profile
within ±1% of its nominal value. The output plastic SOT-223 and D-Pak packages for
current-limit point is also trimmed, which helps
applications where space is at a premium. The
to minimize stress on both the regulator and the
LX8117 is also available in a plastic TO-263
system power source when they are operated package for instances when the thermal
under short-circuit conditions. The regulator's resistance from the circuit die to the
internal circuitry will operate at input-to-output
environment must be minimized.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
KEY FEATURES
0.2% Line Regulation Maximum
0.4% Load Regulation Maximum
Output Current Of 800mA
Regulates Down To 1.2V
Dropout (LX8117) And 1.3V
Dropout (LX8117A)
Operates Down To 1V Dropout
Space Saving SOT-223 Surface
Mount Package
Guaranteed Dropout Voltage At
Multiple Current Levels
Three-Terminal Adjustable Or
Fixed 2.5V, 2.85V, 3.3V & 5V
APPLICATIONS
Battery Chargers
Active SCSI Terminators
5V To 3.3V Linear Regulators
High-Efficiency Linear
Regulators
Post Regulators For Switching
Supplies
PRODUCT HIGHLIGHT
A
CTIVE
T
ERMINATOR FOR
SCSI-2 B
US
110
Ω
110
Ω
Available Options Per Part #
Part #
Output Voltage
LX8117(x)-25
2.5V
LX8117(x)-28
2.8V
LX8117(x)-33
3.3V
LX8117(x)-05
5V
(x) – denotes O/P Current Setting
LX8117-28
IN
4.75V to
5.25V
GND
10 µF
22 µF
OUT
110
Ω
18 to 27
Lines
110
Ω
T
A
(°C)
O/P
Current
0.8A
1.0A
1.2A
ST
PACKAGE ORDER INFO
Plastic SOT-223
Plastic TO-263
DD
3-Pin
3-Pin
RoHS Compliant / Pb-free
Transition DC: 0535
DT
Plastic TO-252
(D-Pak) 3-Pin
RoHS Compliant / Pb-free
Transition DC: 0522
RoHS Compliant / Pb-free
Transition DC: 0532
0 to 125
LX8117-xxCST
LX8117A-xxCST
LX8117B-xxCST
LX8117-xxCDD
LX8117A-xxCDD
LX8117B-xxCDD
LX8117-xxCDT
LX8117A-xxCDT
LX8117B-xxCDT
Note: Available in Tape & Reel. Append the letter “TR” to the part number. (i.e. LX8117-00CST-TR)
Copyright
©
2000
Rev. 1.5a,2005-10-25
M
ICROSEMI
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L
O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
P
R O D U C T I O N
D
A T A
S
H E E T
PACKAGE PIN OUTS
TAB IS V
OUT
3.
IN
2.
OUT
1.
ADJ / GND
A BS OLUTE MAXIMUM RATINGS
(Note 1)
Power Dissipation .................................................................................. Internally Limited
Input Voltage
LX8117-00/8117A-00/8117B-00 (Adj.) ..................................................................... 15V
LX8117-33/8117A-33/8117B-33 (3.3V), LX8117-05/8117A-05/8117B-05 (5.0V) .... 15V
LX8117-25/8117A-25/8117B-25 (2.5V), LX8117-28/8117A-28/8117B-28 (2.85V) .. 12V
Surge Voltage ............................................................................................................... 15V
Operating Junction Temperature
Plastic (ST, DD & DT Packages) .......................................................................... 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Short-Circuit Protection ....................................................................................... Indefinite
RoHS 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 the specified terminal.
ST PACKAGE
(Top View)
TAB IS V
OUT
3
2
1
IN
OUT
ADJ / GND
T H ER MAL DATA
ST PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
θ
JT
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θ
JA
DD PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
θ
JT
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θ
JA
DT PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
θ
JC
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θ
JA
9°C/W
*80°C/W
10°C/W
*60°C/W
TAB IS V
OUT
15°C/W
*150°C/W
DD PACKAGE (D
2
Pak)
(Top View)
3.
IN
2.
OUT
1.
ADJ / GND
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
). The
θ
JA
numbers are guidelines for the
thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
*
θ
JA
can be improved with package soldered to 0.5IN
2
copper area over backside ground
plane or internal power plane.
θ
JA
can vary from 20ºC/W to > 40ºC/W depending on
mounting technique. (See Application Notes Section: Thermal Considerations)
DT PACKAGE (D-Pak)
(Top View)
RoHS / Pb-free 100% Matte Tin Lead Finish
BLOCK D IAGR AM
V
IN
Bias
Circuit
Thermal
Limit Circuit
Bandgap
Circuit
Control
Circuit
Output
Circuit
V
OUT
ADJ
Current
Limit Circuit
2
Copyright © 1999
Rev. 1.5a
PRODUCT DATABOOK 1996/1997
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L
O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
P
R O D U C T I O N
D
A T A
S
H E E T
(Note 2)
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S
Parameter
Input Voltage
Operating Voltage
Symbol
Recommended Operating Conditions
Min.
Typ.
Max.
15
12
10
125
Units
LX8117(A/B)-00 / 8117(A/B)-05
LX8117(A/B)-25 / -28 / -33
Input-Output Differential
LX8117(A/B)-00
Operating Ambient Temperature Range
Note 2. Range over which the device is functional.
0
V
V
V
°C
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified: 0°C
≤
T
J
≤
125°C, I
MAX
= 0.8A for the LX8117-xx, I
MAX
= 1.0A for the LX8117A-xx, and I
MAX
= 1.2A for the LX8117B-xx.)
LX8117-00 / 8117A-00 / 8117B-00
(Adjustable)
Parameter
Reference Voltage
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 4)
LX8117-00
LX8117A/B-00
Current Limit
LX8117-00
LX8117A-00
LX8117B-00
Minimum Load Current (Note 5)
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Output Noise (% of V
OUT
)
Symbol
V
REF
Test Conditions
LX8117 / 17A / 17B-00
Min. Typ.
Max.
1.238
1.225
1.250
1.250
0.05
0.15
0.97
1.00
1.05
1.15
950
1200
1500
0.5
0.08
75
45
0.2
0.5
0.3
0.003
1.262
1.270
0.2
0.4
1.10
1.15
1.20
1.30
Units
V
V
%
%
V
V
V
V
mA
mA
mA
mA
%/W
dB
µA
µA
%
%
%
I
OUT
= 10mA, (V
IN
- V
OUT
) = 2V, T
J
= 25°C
10mA
≤
I
OUT
≤
I
OUT (MAX)
, 1.4V
≤
(V
IN
- V
OUT
)
≤
10V
∆V
REF
(V
IN
) I
OUT
= 10mA, 1.5V
≤
(V
IN
- V
OUT
)
≤
7V
∆V
REF
(I
OUT
) (V
IN
- V
OUT
) = 3V, 10mA
≤
I
OUT
≤
I
OUT (MAX)
∆V
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= I
OUT (MAX)
I
OUT
= I
OUT (MAX)
I
OUT (MAX)
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
I
OUT (MIN)
V
IN
≤
10V
∆V
OUT
(Pwr)
T
A
= 25°C, 30ms pulse
f
RIPPLE
=120Hz, (V
IN
- V
OUT
) = 3V, V
RIPPLE
= 1Vp-p
I
ADJ
∆I
ADJ
10mA
≤
I
OUT
≤
I
OUT (MAX)
, 1.4V
≤
(V
IN
- V
OUT
)
≤
10V
∆V
OUT
(T)
∆V
OUT
(t) T
A
= 125°C, 1000 hours
V
OUT (RMS)
10Hz
≤
f
≤
10kHz
800
1000
1200
5
0.2
100
5
60
Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction
temperature by low duty cycle pulse testing.
4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured
at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve.
5. Minimum load current is defined as the minimum output current required to maintain regulation.
(Other Voltage Options on following pages.)
Copyright © 1999
Rev. 1.5a
3
PRODUCT DATABOOK 1996/1997
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L
O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
P
R O D U C T I O N
D
A T A
S
H E E T
(continued)
ELECTRICAL CHARACTERISTICS
LX8117-25 / 8117A-25 / 8117B-25
(2.5V Fixed)
Parameter
Output Voltage
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 4)
LX8117-25
LX8117A/B-25
LX8117-25
LX8117A-25
LX8117B-25
Symbol
V
OUT
Test Conditions
LX8117 / 17A / 17B-25
Min. Typ.
Max.
2.475
2.450
2.500
2.500
1
2
0.97
1.00
1.05
1.15
950
1200
1500
4.5
0.08
75
0.5
0.3
0.003
2.525
2.550
6
10
1.10
1.15
1.20
1.30
Units
V
V
mV
mV
V
V
V
V
mA
mA
mA
mA
%/W
dB
%
%
%
Current Limit
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise (% of V
OUT
)
I
OUT
= 10mA, V
IN
= 5V, T
A
= 25°C
0mA
≤
I
OUT
≤
I
OUT (MAX)
, 4.75V
≤
V
IN
≤
10V
∆V
OUT
(V
IN
) I
OUT
= 0mA, 4.25V
≤
V
IN
≤
10V
∆V
OUT
(I
OUT
)
V
IN
= 4.25V, 0mA
≤
I
OUT
≤
I
OUT (MAX)
∆V
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= I
OUT (MAX)
I
OUT
= I
OUT (MAX)
I
OUT (MAX)
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
I
Q
V
IN
≤
10V
∆V
OUT
(Pwr)
T
A
= 25°C, 30ms pulse
f
RIPPLE
=120Hz, (V
IN
- V
OUT
) = 3V, V
RIPPLE
= 1Vp-p
∆V
OUT
(T)
∆V
OUT
(t) T
A
= 125°C, 1000 hours
V
OUT (RMS)
10Hz
≤
f
≤
10kHz
800
1000
1200
10
0.2
60
LX8117-28 / 8117A-28 / 8117B-28
(2.8V Fixed)
Parameter
Output Voltage
Symbol
V
OUT
Test Conditions
LX8117 / 17A / 17B-28
Min. Typ.
Max.
2.820
2.790
2.790
2.850
2.850
2.850
1
2
0.97
1.00
1.05
1.15
950
1200
1500
4.5
0.08
75
0.5
0.3
0.003
2.880
2.910
2.910
6
10
1.10
1.15
1.20
1.30
Units
V
V
V
mV
mV
V
V
V
V
mA
mA
mA
mA
%/W
dB
%
%
%
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 4)
LX8117-28
LX8117A/B-28
LX8117-28
LX8117A-28
LX8117B-28
Current Limit
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise (% of V
OUT
)
I
OUT
= 10mA, V
IN
= 4.85V, T
A
= 25°C
0mA
≤
I
OUT
≤
I
OUT (MAX)
, 4.25V
≤
V
IN
≤
10V
0mA
≤
I
OUT
≤
500mA, V
IN
= 3.95V
∆V
OUT
(V
IN
) I
OUT
= 0mA, 4.25V
≤
V
IN
≤
10V
∆V
OUT
(I
OUT
)
V
IN
= 4.25V, 0mA
≤
I
OUT
≤
I
OUT (MAX)
∆V
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= I
OUT (MAX)
I
OUT
= I
OUT (MAX)
I
OUT (MAX)
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
I
Q
V
IN
≤
10V
∆V
OUT
(Pwr)
T
A
= 25°C, 30ms pulse
f
RIPPLE
=120Hz, (V
IN
- V
OUT
) = 3V, V
RIPPLE
= 1Vp-p
∆V
OUT
(T)
∆V
OUT
(t) T
A
= 125°C, 1000 hours
V
OUT (RMS)
10Hz
≤
f
≤
10kHz
800
1000
1200
10
0.2
60
Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction
temperature by low duty cycle pulse testing.
4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured
at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve.
5. Minimum load current is defined as the minimum output current required to maintain regulation.
4
Copyright © 1999
Rev. 1.5a
PRODUCT DATABOOK 1996/1997
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L
O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
P
R O D U C T I O N
D
A T A
S
H E E T
(continued)
ELECTRICAL CHARACTERISTICS
LX8117-33 / 8117A-33 / 8117B-33
(3.3V Fixed)
Parameter
Output Voltage
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 4)
LX8117-33
LX8117A/B-33
LX8117-33
LX8117A-33
LX8117B-33
Symbol
V
OUT
Test Conditions
LX8117 / 17A / 17B-33
Min. Typ.
Max.
3.267
3.235
3.300
3.300
1
2
0.97
1.00
1.05
1.15
950
1200
1500
4.5
0.08
75
0.5
0.3
0.003
3.333
3.365
6
10
1.10
1.15
1.20
1.30
Units
V
V
mV
mV
V
V
V
V
mA
mA
mA
mA
%/W
dB
%
%
%
Current Limit
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise (% of V
OUT
)
I
OUT
= 10mA, V
IN
= 5V, T
A
= 25°C
0mA
≤
I
OUT
≤
I
OUT (MAX)
, 4.75V
≤
V
IN
≤
10V
∆V
OUT
(V
IN
) I
OUT
= 0mA, 4.25V
≤
V
IN
≤
10V
∆V
OUT
(I
OUT
)
V
IN
= 4.25V, 0mA
≤
I
OUT
≤
I
OUT (MAX)
∆V
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= I
OUT (MAX)
I
OUT
= I
OUT (MAX)
I
OUT (MAX)
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
I
Q
V
IN
≤
10V
∆V
OUT
(Pwr)
T
A
= 25°C, 30ms pulse
f
RIPPLE
=120Hz, (V
IN
- V
OUT
) = 3V, V
RIPPLE
= 1Vp-p
∆V
OUT
(T)
∆V
OUT
(t) T
A
= 125°C, 1000 hours
V
OUT (RMS)
10Hz
≤
f
≤
10kHz
800
1000
1200
10
0.2
60
LX8117-05 / 8117A-05 / 8117B-05
(5.0V Fixed)
Parameter
Output Voltage
Line Regulation (Note 3)
Load Regulation (Note 3)
Dropout Voltage
(Note 4)
LX8117-05
LX8117A/B-05
LX8117-05
LX8117A-05
LX8117B-05
Symbol
V
OUT
Test Conditions
LX8117 / 17A / 17B-05
Min. Typ.
Max.
4.950
4.900
5.000
5.000
1
2.5
0.97
1.00
1.05
1.15
950
1200
1500
4.5
0.08
75
0.5
0.3
0.003
5.050
5.100
10
15
1.10
1.15
1.20
1.30
Units
V
V
mV
mV
V
V
V
V
mA
mA
mA
mA
%/W
dB
%
%
%
Current Limit
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise (% of V
OUT
)
I
OUT
= 10mA, V
IN
= 7V, T
A
= 25°C
0mA
≤
I
OUT
≤
I
OUT (MAX)
, 6.50V
≤
V
IN
≤
10V
∆V
OUT
(V
IN
) I
OUT
= 0mA, 6.5V
≤
V
IN
≤
10V
∆V
OUT
(I
OUT
)
V
IN
= 6.5V, 0mA
≤
I
OUT
≤
I
OUT (MAX)
∆V
I
OUT
= 100mA
I
OUT
= 500mA
I
OUT
= I
OUT (MAX)
I
OUT
= I
OUT (MAX)
I
OUT (MAX)
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
(V
IN
- V
OUT
) = 5V, T
J
= 25°C
I
Q
V
IN
≤
10V
∆V
OUT
(Pwr)
T
A
= 25°C, 30ms pulse
f
RIPPLE
=120Hz, (V
IN
- V
OUT
) = 3V, V
RIPPLE
= 1Vp-p
∆V
OUT
(T)
∆V
OUT
(t) T
A
= 125°C, 1000 hours
V
OUT (RMS)
10Hz
≤
f
≤
10kHz
800
1000
1200
10
0.2
60
Notes: 3. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction
temperature by low duty cycle pulse testing.
4. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured
at the specified output current. Test points and limits are also shown on the Dropout Voltage Curve.
5. Minimum load current is defined as the minimum output current required to maintain regulation.
Copyright © 1999
Rev. 1.5a
5
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