CS5253B-8
3.0 A LDO 5-Pin 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–NPN based LDO
regulators. In this mode the dropout is determined by the minimum
control voltage.
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Tab = V
OUT
1
Pin 1. V
SENSE
5
2. GND
2
The CS5253B–8 is offered in a five–terminal D PAK package,
3. V
4. V
5. V
OUT
2
D PAK
which allows for the implementation of a remote–sense 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.
CONTROL
POWER
5–PIN
DP SUFFIX
CASE 936F
MARKING DIAGRAM
The CS5253B–8 has a very fast transient loop response.
Internal protection circuitry provides for “bust–proof” operation,
similar to three–terminal regulators. This circuitry, which includes
overcurrent, short circuit, and overtemperature protection will self
protect the regulator under all fault conditions.
CS
5253B–8
AWLYWW
The CS5253B–8 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–8 is optimized from the CS5253–1 to allow a
lower value of output capacitor to be used at the expense of a slower
transient response.
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
Features
• V
• V
• V
Fixed @ 2.5 V ± 1.5%
OUT
ORDERING INFORMATION
Dropout < 0.40 V @ 3.0 A
POWER
Dropout < 1.05 V @ 3.0 A
Device
Package
Shipping
50 Units/Rail
CONTROL
• 1.5% Trimmed Reference
2
CS5253B–8GDP5
D PAK*
• Fast Transient Response
• Remote Voltage Sensing
• Thermal Shutdown
2
CS5253B–8GDPR5
*5–Pin.
D PAK*
750 Tape & Reel
• Current Limit
• Short Circuit Protection
• Drop–In Replacement for EZ1582
• Backwards Compatible with 3–Pin Regulators
• Very Low Dropout Reduces Total Power Consumption
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
March, 2001 – Rev. 2
CS5253B–8/D