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CS5257A-1 数据表(PDF) 1 Page - Cherry Semiconductor Corporation

部件名 CS5257A-1
功能描述  7A LDO 5-Pin Adjustable Linear Regulator
Download  9 Pages
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制造商  CHERRY [Cherry Semiconductor Corporation]
网页  http://www.cherrycorp.com/
标志 CHERRY - Cherry Semiconductor Corporation

CS5257A-1 数据表(HTML) 1 Page - Cherry Semiconductor Corporation

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V
SENSE
V
OUT
V
CONTROL
V
POWER
CS5257A-1
2.5V @ 7A
300
mF
5V
Load
124
1%
124
1%
0.1
mF
5V
100
mF
5V
10
mF
10V
3.3V
5.0V
Adjust
Features
Package Options
7A LDO 5-Pin Adjustable Linear Regulator
CS5257A-1
Description
Applications Diagram
5 Lead TO-220
1
1. VSENSE
2. Adjust
3. VOUT
4. VCONTROL
5. VPOWER
Tab = VOUT
1
Rev. 4/5/99
This new very low dropout regula-
tor is designed to power the next
generation of advanced micropro-
cessors. To achieve very low
dropout, the internal pass transistor
is powered separately from the con-
trol 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 mini-
mum control voltage.
It is supplied in five-terminal
TO-220 and D2PAK packages,
allowing for the implementation of
a remote-sense pin permitting very
accurate regulation of output volt-
age directly at the load, where it
counts, rather than at the regulator.
This remote sensing feature virtual-
ly eliminates output voltage varia-
tions due to load changes and resis-
tive voltage drops. Typical load
regulation measured at the sense
pin is 1mV for an output voltage of
2.5V with a load step of 10mA to
7A.
The very fast transient loop
response easily meets the needs of
the latest microprocessors. In addi-
tion, a small capacitor on the Adjust
pin will further improve the tran-
sient capabilities.
Internal protection circuitry pro-
vides for Òbust-proofÓ operation,
similar to three-terminal regulators.
This circuitry, which includes over-
current, short circuit, supply
sequencing and overtemperature
protection will self protect the regu-
lator under all fault conditions.
The CS5257A-1 is ideal for generat-
ing a secondary 2-2.5V low voltage
supply on a motherboard where
both 5V and 3.3V are already avail-
able.
s 1.25V to 5V VOUT at 7A
s VPOWER Dropout < 0.35V @ 7A
s VCONTROL Dropout < 1.10V @
7A
s 1.5% Trimmed Reference
s Fast Transient Response
s Remote Voltage Sensing
s Thermal Shutdown
s Current Limit
s Short Circuit Protection
s Drop-In Replacement for
LT1580
s Backwards Compatible with
3-pin Regulators
1
5 Lead D2PAK
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
¨


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