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PDF CS5258-1GT5 Data sheet ( Hoja de datos )
| Número de pieza | CS5258-1GT5 | |
| Descripción | 8A LDO 5-Pin Adjustable Linear Regulator | |
| Fabricantes | Cherry Semiconductor Corporation | |
| Logotipo |  |
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CS5258-1
8A LDO 5-Pin Adjustable Linear Regulator
Description
This new very low dropout regula-
tor is designed to power the next
generation of advanced microproces-
sors. To achieve very low dropout,
the internal pass transistor is pow-
ered separately from the control cir-
cuitry. 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.
It is supplied in a five-terminal TO-
220 package, which allows for the
implementation of a remote-sense
pin permitting very accurate regula-
tion 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 1mV for an output
voltage of 2.5V with a load step of
10mA to 8A.
The very fast transient loop response
easily meets the needs of the latest
microprocessors. In addition, a small
capacitor on the Adjust pin will fur-
ther improve the transient capabili-
ties.
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 CS5258-1 is ideal for generating
a secondary 2 - 2.5V low voltage
supply on a motherboard where
both 5V and 3.3V are already
available.
Features
s 1.25V to 5V VOUT at 8A
s VPOWER Dropout <0.4V @ 8A
s VCONTROL Dropout <1.15V @
8A
s 1.5% Trimmed Reference
s Fast Transient Response
s Remote Voltage Sensing
s Thermal Shutdown
s Current Limit
s Short Circuit Protection
s Backwards Compatible with
3-pin Regulators
Package Options
Applications Diagram
5 Lead TO-220
5.0V
3.3V
10mF
10V
Rev. 3/17/99
VCONTROL VOUT
CS5258-1
VPOWER VSENSE
Adjust
100mF
5V
0.1mF
5V
2.5V@8A
124
1%
124
1%
Load
300mF
5V
1. VSENSE
1 2. Adjust
3. VOUT
4. VCONTROL
5. VPOWER
Tab = VOUT
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: [email protected]
Web Site: www.cherry-semi.com
1 A ¨ Company
1 page  
Typical Performance Characteristics: continued
Minimum Load Current vs VCONTROL-VOUT
1200.000
1150.000
1100.000
1050.000
VPOWER = 3.3V
D VOUT= +1%
1000.000
950.000
900.000
850.000
800.000
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0
VCONTROL-VOUT (V)
Current Step Transient Response
100
50
0
-50
-100
8
0
0
01
COUT=330mF
CPOWER=110mF
CCONTROL=10mF
CADJUST=0.1mF
VCONTROL=5V
VPOWER=3.3V
VOUT=2.5V
2345
Time (ms)
Short Circuit Current vs VPOWER-VOUT
15.0
14.0
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VPOWER-VOUT (V)
Adjust Pin Current vs Output Current
77.00
76.00
VPOWER=2.15
VCONTROL=2.75V
75.00
74.00
73.00
72.00
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00
Output Current (A)
Adjust Pin Current vs VCONTROL-VOUT
75.00
74.00
VPOWER =2.15V
IL=10mA
73.00
72.00
71.00
70.00
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0
VCONTROL-VOUT (V)
75.00
74.00
Adjust Pin Current vs VPOWER-VOUT
VCONTROL=2.75V
IL=10mA
73.00
72.00
71.00
70.00
0.50
1.50
2.50
VPOWER-VOUT (V)
3.50
4.50
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet CS5258-1GT5.PDF ] | |
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