CS5253B鈭?
3.0 A LDO 5鈭扨in 2.5 V Fixed
Linear Regulator for
Remote Sense Applications
This new very low dropout linear regulator reduces total power
dissipation in the application. To achieve very low dropout, the
internal pass transistor is powered separately from the control
circuitry. Furthermore, with the control and power inputs tied together,
this device can be used in single supply configuration and still offer a
better dropout voltage than conventional PNP鈭扤PN based LDO
regulators. In this mode the dropout is determined by the minimum
control voltage.
The CS5253B鈭? is offered in a five鈭抰erminal D
2
PAK鈭? package,
which allows for the implementation of a remote鈭抯ense pin permitting
very accurate regulation of output voltage directly at the load, where it
counts, rather than at the regulator. This remote sensing feature
virtually eliminates output voltage variations due to load changes and
resistive voltage drops. Typical load regulation measured at the sense
pin is less than 1.0 mV for an output voltage of 2.5 V with a load step
of 10 mA to 3.0 A.
The CS5253B鈭? has a very fast transient loop response.
Internal protection circuitry provides for 鈥渂ust鈭抪roof鈥?operation,
similar to three鈭抰erminal regulators. This circuitry, which includes
overcurrent, short circuit, and overtemperature protection will self
protect the regulator under all fault conditions.
The CS5253B鈭? is ideal for generating a 2.5 V supply to power
graphics controllers used on VGA cards. Its remote sense and low
value capacitance requirements make this a low cost high performance
solution. The CS5253B鈭? is optimized from the CS5253鈭? to allow a
lower value of output capacitor to be used at the expense of a slower
transient response.
Features
http://onsemi.com
1
5
D
2
PAK鈭?
DP SUFFIX
CASE 936AC
Tab = V
OUT
Pin 1. V
SENSE
2. GND
3. V
OUT
4. V
CONTROL
5. V
POWER
MARKING DIAGRAM
CS
5253B鈭?
AWLYWW
1
A
WL
Y
WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
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Pb鈭扚ree Package is Available*
V
OUT
Fixed @ 2.5 V
卤
1.5%
V
POWER
Dropout < 0.40 V @ 3.0 A
V
CONTROL
Dropout < 1.05 V @ 3.0 A
1.5% Trimmed Reference
Fast Transient Response
Remote Voltage Sensing
Thermal Shutdown
Current Limit
Short Circuit Protection
Drop鈭扞n Replacement for EZ1582
Backwards Compatible with 3鈭扨in Regulators
Very Low Dropout Reduces Total Power Consumption
ORDERING INFORMATION
Device
CS5253B鈭?GDP5
CS5253B鈭?GDPR5
CS5253B鈭?GDPR5G
Package
D
2
PAK鈭?
Shipping
鈥?/div>
50 Units/Rail
D
2
PAK鈭? 750 Tape & Reel
D
2
PAK鈭? 750 Tape & Reel
(Pb鈭扚ree)
鈥燜or information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
*For additional information on our Pb鈭扚ree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
漏
Semiconductor Components Industries, LLC, 2004
1
June, 2004 鈭?Rev. 5
Publication Order Number:
CS5253B鈭?/D
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