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CS5257A-1/D

更新时间： 2024-09-27 23:43:47
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7A LDO 5-Pin Adjustable Linear Regulator

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CS5257A-1/D 数据手册

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CS5257A-1  
7.0 A LDO 5-Pin Adjustable  
Linear Regulator  
This new very low dropout regulator is designed to power the next  
generation of advanced microprocessors. 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.  
http://onsemi.com  
TO–220  
FIVE LEAD  
T SUFFIX  
2
It is supplied in five–terminal TO–220 and D PAK packages,  
allowing 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 1.0 mV for an output voltage of 2.5 V with a load step of 10 mA  
to 7.0 A.  
The very fast transient loop response easily meets the needs of the  
latest microprocessors. In addition, a small capacitor on the Adjust pin  
will further improve the transient capabilities.  
Internal protection circuitry provides for “bust–proof” operation,  
similar to three–terminal regulators. This circuitry, which includes  
overcurrent, short circuit, supply sequencing and overtemperature  
protection will self protect the regulator under all fault conditions.  
The CS5257A–1 is ideal for generating a secondary 2.0–2.5 V low  
voltage supply on a motherboard where both 5.0 V and 3.3 V are  
already available.  
Tab = V  
Pin 1. V  
OUT  
CASE 314D  
SENSE  
2. Adjust  
3. V  
OUT  
1
4. V  
5. V  
CONTROL  
POWER  
5
2
D PAK  
5–PIN  
DP SUFFIX  
CASE 936F  
1
5
MARKING DIAGRAMS  
2
TO–220  
D PAK  
CS  
5257A–1  
Features  
AWLYWW  
• 1.25 V to 5.0 V V  
at 7.0 A  
CS5257A–1  
AWLYWW  
OUT  
• V  
• V  
Dropout < 0.35 V @ 7.0 A  
Dropout < 1.1 V @ 7.0 A  
POWER  
CONTROL  
1
• 1.5% Trimmed Reference  
• Fast Transient Response  
• Remote Voltage Sensing  
• Thermal Shutdown  
1
A
= Assembly Location  
WL, L = Wafer Lot  
YY, Y = Year  
WW, W = Work Week  
• Current Limit  
• Short Circuit Protection  
• Drop–In Replacement for LT1580  
• Backwards Compatible with 3–Pin Regulators  
ORDERING INFORMATION  
Device  
Package  
Shipping  
TO–220  
FIVE LEAD  
CS5257A–1GT5  
CS5257A–1GDP5  
50 Units/Rail  
2
D PAK*  
50 Units/Rail  
2
CS5257A–1GDPR5  
*5–Pin.  
D PAK*  
750 Tape & Reel  
Semiconductor Components Industries, LLC, 2001  
1
Publication Order Number:  
March, 2001 – Rev. 7  
CS5257A–1/D  
1234567...12

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