LX8117-25CDD Microsemi Analog Mixed Signal Group, LX8117-25CDD Datasheet

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LX8117-25CDD

Manufacturer Part Number
LX8117-25CDD
Description
IC REG LDO POS 0.8A 2.5V TO263
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet

Specifications of LX8117-25CDD

Regulator Topology
Positive Fixed
Voltage - Output
2.5V
Voltage - Input
Up to 12V
Voltage - Dropout (typical)
1.05V @ 800mA
Number Of Regulators
1
Current - Limit (min)
800mA
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-3, D²Pak (3 leads + Tab), TO-263AA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
T
Copyright © 2000
Rev. 1.5a,2005-10-25
H E
Low Dropout (LDO) regulators. At the designed
maximum load current, the LX8117 series
dropout voltage is guaranteed to be 1.2V or
lower at 0.8A (LX8117A 1.3V @ 1A). The
dropout voltage decreases with load current.
LX8117/17A/17B is available, as well as
versions with fixed outputs of 2.5V, 2.85V, 3.3V
and 5V. The 2.85V version is specifically
designed for use as a component of active
termination networks for the SCSI bus. On-chip
trimming of the internal voltage reference allows
specification of the initial output voltage to
within ±1% of its nominal value. The output
current-limit point is also trimmed, which helps
to minimize stress on both the regulator and the
system power source when they are operated
under short-circuit conditions. The regulator's
internal circuitry will operate at input-to-output
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
The LX8117/8117A/8117B series are positive
An adjustable output voltage version of the
I
4.75V to
5.25V
N F I N I T E
0 to 125
T
A
(°C)
P
O W E R
A
11861 W
CTIVE
10 µF
Current
Note: Available in Tape & Reel. Append the letter “TR” to the part number. (i.e. LX8117-00CST-TR)
P R O D U C T H I G H L I G H T
0.8A
1.0A
1.2A
O/P
IN
LX8117-28
O F
T
ESTERN
ERMINATOR FOR
D E S C R I P T I O N
GND
I
ST
N N O V A T I O N
RoHS Compliant / Pb-free
A
LX8117A-xxCST
LX8117B-xxCST
VENUE
OUT
Transition DC: 0522
LX8117-xxCST
Plastic SOT-223
3-Pin
, G
capacitors with values in the range of tens to
hundreds
LX8117/17A/17B typically requires at least
10µF of output capacitance for stable operation.
to as much as 10 percent of their output as a
quiescent current which flows directly to
ground, bypassing the load. Quiescent current
from the LX8117/17A/17B flows through the
load, increasing power-use efficiency and
allowing cooler operation.
plastic SOT-223 and D-Pak packages for
applications where space is at a premium. The
LX8117 is also available in a plastic TO-263
package for instances when the thermal
resistance
environment must be minimized.
differential voltages down to 1V.
ARDEN
SCSI-2 B
M
Most regulator circuit designs include output
PNP-type regulators can waste current equal
The LX8117 is available in low-profile
PACKAGE ORDER INFO
I C R O S E M I
G
22 µF
ROVE
of
from
, CA. 92841, 714-898-8121, F
US
LX8117-xx / 8117A-xx / 8117B-xx
microfarads
0 . 8 , 1 & 1 . 2 A L
DD
RoHS Compliant / Pb-free
the
LX8117A-xxCDD
LX8117B-xxCDD
I
Transition DC: 0535
LX8117-xxCDD
110 Ω
110 Ω
110 Ω
110 Ω
N C
circuit
Plastic TO-263
3-Pin
P
.
R O D U C T I O N
or
die
more.
18 to 27
Lines
O W
AX
to
: 714-893-2570
D
The
the
R O P O U T
DT
Available Options Per Part #
(x) – denotes O/P Current Setting
LX8117(x)-25
LX8117(x)-28
LX8117(x)-33
LX8117(x)-05
RoHS Compliant / Pb-free
D
LX8117A-xxCDT
LX8117B-xxCDT
Transition DC: 0532
LX8117-xxCDT
A T A
Part #
P
Plastic TO-252
(D-Pak) 3-Pin
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
Battery Chargers
Active SCSI Terminators
5V To 3.3V Linear Regulators
High-Efficiency Linear
Regulators
Post Regulators For Switching
Supplies
O S I T I V E
K E Y F E A T U R E S
A P P L I C A T I O N S
S
H E E T
R
Output Voltage
E G U L A T O R S
2.5V
2.8V
3.3V
5V
1

Related parts for LX8117-25CDD

LX8117-25CDD Summary of contents

Page 1

... O/P T (°C) A Current 0. 125 1.0A 1.2A 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 11861 W ESTERN LX8117-xx / 8117A-xx / 8117B- & differential voltages down to 1V. Most regulator circuit designs include output ...

Page 2

... LUT E MAXIMU M RATINGS 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° ...

Page 3

... 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 LX8117-xx/8117A-xx/8117B- Symbol 0.8A for the LX8117-xx 1.0A for the LX8117A-xx, and I MAX MAX Test Conditions 10mA 2V 25°C REF OUT IN OUT J 10mA ...

Page 4

... LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L 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 Current Limit LX8117-25 LX8117A-25 LX8117B-25 Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% of V ...

Page 5

... LX8117-33 I LX8117A-33 LX8117B-33 Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise (% OUT LX8117-05 / 8117A-05 / 8117B-05 (5.0V Fixed) Parameter Symbol Output Voltage Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 4) LX8117-05 LX8117A/B-05 Current Limit LX8117-05 I ...

Page 6

... LX8117-xx/8117A-xx/8117B-xx 0.8, 1 & 1.2A L The LX8117 series ICs are easy to use Low-Dropout (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. ...

Page 7

... Output ripple will be twice as bad as it would be if the ADJ pin were to be bypassed to ground with a properly selected capacitor. OUTPUT VOLTAGE The LX8117 ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 2). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage ...

Page 8

... SOT-223 package soldered at the center of the pad to ambient. Area Substituting the value for R square pad with area: Area SINK will be required to maintain the LX8117 junction temperature within specified limits 5.0V ±5 2.5V ±3% OUT = 0.5A 55° ...

Page 9

... C1 10µF* * Needed if device is far from filter capacitors FIGURE 5 — 1. ADJUSTABLE REGULATOR LX8117-33 V OUT IN IN GND FIGURE 6 — FIXED 3.3V OUTPUT REGULATOR ) DROPOUT (MAX LX8117-xx OUT IN ADJ R1 121 C2 C1* 100µF 10µ 1.25V 1 + OUT R1 3.3V Min. 15µF Tantalum or 100µF Aluminum capacitor. ...

Page 10

... LX8117-xx / 8117A-xx / 8117B-xx 0.8, 1 & 1. 3-Pin Plastic SOT-223 3-Pin Plastic TO-263 0° -8° ROPOUT OSITIVE Seating Plane R EGULATORS M I ILLIMETERS NCHES D IM MIN MAX MIN A 1.55 1.80 0.061 B 0.65 0.85 0.026 B1 2.95 3.15 0.116 C 0.25 0.35 0.010 D 6.30 6.70 0.248 E 3.30 3 ...

Page 11

... LX8117-xx / 8117A-xx / 8117B-xx 0.8, 1 & 1. 3-Pin Plastic TO-252 Copyright © 1999 Rev. 1. ROPOUT OSITIVE Note Dimensions do not include mold flash or R EGULATORS M I ILLIMETERS NCHES IM MIN MAX MIN A 6.47 6.73 0.255 B 5.97 6.23 0.235 C 2.16 2.42 0.085 D 0.68 0.94 0.027 E 0.38 ...

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