900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Cherry Semiconductor Corporation

CS5257A-1 Datasheet Preview

CS5257A-1 Datasheet

7A LDO 5-Pin Adjustable Linear Regulator

No Preview Available !

CS5257A-1
7A LDO 5-Pin Adjustable Linear Regulator
Description
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.
Features
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
Package Options
Applications Diagram
5 Lead TO-220 5 Lead D2PAK
5.0V
3.3V
10mF
10V
VCONTROL VOUT
CS5257A-1
VPOWER VSENSE
Adjust
100mF
5V
0.1mF
5V
2.5V @ 7A
124
1%
124 Load
1%
300mF
5V
1
1. VSENSE
1 2. Adjust
3. VOUT
4. VCONTROL
5. VPOWER
Tab = VOUT
Rev. 4/5/99
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
1 A ¨ Company




Cherry Semiconductor Corporation

CS5257A-1 Datasheet Preview

CS5257A-1 Datasheet

7A LDO 5-Pin Adjustable Linear Regulator

No Preview Available !

Absolute Maximum Ratings
VPOWER Input Voltage .................................................................................................................................................................6V
VCONTROL Input Voltage ...........................................................................................................................................................13V
Operating Junction Temperature Range...........................................................................................................0¡C ² TJ ² 150¡C
Storage Temperature Range ................................................................................................................................-65¡C to +150¡C
Lead Temperature Soldering
Wave Solder (through hole styles only) .....................................................................................10 sec. max, 260¡C peak
Reflow (SMD styles only) ......................................................................................60 sec. max above 183¡C, 230¡C peak
ESD Damage Threshold............................................................................................................................................................2kV
Electrical Characteristics: 0¡C ² TA ² 70¡C, 0¡C ² TJ ² 150¡C, VSENSE = VOUT and VAdj = 0V; unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
Reference Voltage
Line Regulation
Load Regulation
(Note 3)
Minimum Load Current
(Note 1)
VCONTROL = 2.75V to 12V, VPOWER = 2.05V to 5.5V,
10mA ² IOUT ² 7A
VCONTROL = 2.5V to 12V, VPOWER = 1.75V to 5.5V,
IOUT = 10mA
VCONTROL = 2.75V, VPOWER = 2.05V,
IOUT = 10mA to 7A, with remote sense
VCONTROL = 5V, VPOWER = 3.3V, ÆVOUT = +1%
1.234
(-1.5%)
Control Pin Current
(Note 2)
Adjust Pin Current
Current Limit
Short Circuit Current
Ripple Rejection
(Note 3)
Thermal Regulation
VCONTROL Dropout Voltage
(Minimum VCONTROL-VOUT)
(Note 4)
VPOWER Dropout Voltage
(Minimum VPOWER-VOUT)
(Note 4)
RMS Output Noise
Temperature Stability
VCONTROL = 2.75V, VPOWER = 2.05V, IOUT = 100mA
VCONTROL = 2.75V, VPOWER = 2.05V, IOUT = 4A
VCONTROL = 2.75V, VPOWER = 1.75V, IOUT = 4A
VCONTROL = 2.75V, VPOWER = 2.05V, IOUT = 7A
VCONTROL = 2.75V, VPOWER = 2.05V, IOUT = 10mA
VCONTROL = 2.75V, VPOWER = 2.05V, ÆVOUT = -1.5%
VCONTROL = 2.75V, VPOWER = 2.05V, VOUT = 0V
VCONTROL = VPOWER = 3.25V,
VRIPPLE = 1VP-P @ 120Hz, IOUT = 4A, CADJ = 0.1µF
30ms Pulse, TA = 25¡C
VPOWER = 2.05V, IOUT = 100mA
VPOWER = 2.05V, IOUT = 1A
VPOWER = 2.05V, IOUT = 2.75A
VPOWER = 2.05V, IOUT = 4A
VPOWER = 2.05V, IOUT = 7A
VCONTROL = 2.75V, IOUT = 100mA
VCONTROL = 2.75V, IOUT = 1A
VCONTROL = 2.75V, IOUT = 2.75A
VCONTROL = 2.75V, IOUT = 4A
VCONTROL = 2.75V, IOUT = 7A
Freq = 10Hz to 10kHz, TA = 25¡C
7.1
5.0
60
Thermal Shutdown (Note 5)
150
Thermal Shutdown Hysteresis
VCONTROL Supply Only
Output Current
VCONTROL = 13V, VPOWER not connected,
VADJUST = VOUT = VSENSE = 0V
TYP
1.253
.02
.04
5
6
30
33
60
60
10.0
9.0
80
0.002
1.00
1.00
1.00
1.00
1.10
.10
.15
.20
.26
.35
0.003
0.5
180
MAX
1.272
(+1.5%)
.20
UNIT
V
%
.20 %
10 mA
10 mA
60 mA
70 mA
180 mA
120 µA
A
A
dB
%/W
1.15 V
1.15 V
1.15 V
1.15 V
1.25 V
.15 V
.20 V
.30 V
.40 V
.65 V
%VOUT
%
210 ¡C
25 ¡C
50 mA
2


Part Number CS5257A-1
Description 7A LDO 5-Pin Adjustable Linear Regulator
Maker Cherry Semiconductor Corporation
PDF Download

CS5257A-1 Datasheet PDF






Similar Datasheet

1 CS5257A-1 7A LDO 5-Pin Adjustable Linear Regulator
Cherry Semiconductor Corporation





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy