Regulator. CS52510-1 Datasheet

CS52510-1 Datasheet PDF

Part CS52510-1
Description 10A LDO 5-Pin Adjustable Linear Regulator
Feature CS52510-1; CS52510-1 CS52510-1 10A LDO 5-Pin Adjustable Linear Regulator Description This new very low dropou.
Manufacture Cherry Semiconductor Corporation
Datasheet
Download CS52510-1 Datasheet




CS52510-1
CS52510-1
10A LDO 5-Pin Adjustable Linear Regulator
Description
This new very low dropout regula-
tor is designed to power the next
generation of advanced micropro-
cessor. 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 a five-terminal
TO-220 package, which allows for
the implementation of a remote-
sense pin permitting very accurate
regulation of output voltage direct-
ly 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 regula-
tion measured at the sense pin is
1mV for an output voltage of 2.5V
with a load step of 10mA to 10A.
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 reg-
ulator under all fault conditions.
The CS52510-1 is ideal for generat-
ing a secondary 2 - 2.5V low voltage
supply on a motherboard where
both 5V and 3.3V are already
available.
Applications Diagram
Features
s 1.25V to 5V VOUT at 10A
s VPOWER Dropout < 0.65V @
10A
s VCONTROL Dropout < 1.25V @
10A
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
5 Lead TO-220
5.0V
3.3V
10mF
10V
VCONTROL VOUT
CS52510-1
VPOWER VSENSE
Adjust
100mF
5V
0.1mF
5V
2.5V@10A
124
1%
124
1%
Load
300mF
5V
1. VSENSE
2. Adjust
1 3. VOUT
4. VCONTROL
5. VPOWER
Tab = VOUT
Rev. 3/17/99
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



CS52510-1
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
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 TYP MAX UNIT
Reference Voltage
Line Regulation
Load Regulation
(Note 3)
Minimum Load Current
(Note 1)
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
Thermal Shutdown (Note 5)
Thermal Shutdown Hysteresis
VCONTROL Supply Only
Output Current
VCONTROL = 2.75V to 12V, VPOWER = 2.5V to 5.5V,
10mA ² IOUT ² 10A
VCONTROL = 2.5V to 12V, VPOWER = 1.75V to 5.5V,
IOUT = 10mA
VCONTROL = 2.75V, VPOWER= 2.5V,
IOUT = 10mA to 10A, with remote sense
VCONTROL = 5V, VPOWER = 3.3V, ÆVOUT = +1%
VCONTROL = 2.75V, VPOWER = 2.5V, IOUT = 100mA
VCONTROL = 2.75V, VPOWER = 2.5V, IOUT = 4A
VCONTROL = 2.75V, VPOWER = 1.75V, IOUT = 4A
VCONTROL = 2.75V, VPOWER = 2.5V, IOUT = 10A
VCONTROL = 2.75V, VPOWER =2.5V, IOUT = 10mA
VCONTROL = 2.75V, VPOWER = 2.5V, ÆVOUT = -1.5%
VCONTROL = 2.75V, VPOWER = 2.5V, VOUT = 0V
VCONTROL= VPOWER = 3.25V Avg,
VRIPPLE = 1VP-P @120Hz, IOUT = 4A, CADJ = 0.1µF
30ms Pulse, TA = 25¡C
VPOWER = 2.5V, IOUT = 100mA
VPOWER = 2.5V, IOUT = 1A
VPOWER = 2.5V, IOUT = 2.75A
VPOWER = 2.5V, IOUT = 4A
VPOWER = 2.5V, IOUT = 10A
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 = 10A
Freq = 10Hz to 10kHz, TA = 25¡C
VCONTROL = 13V, VPOWER not connected,
VADJUST = VOUT = VSENSE = 0V
1.234
(-1.5%)
1.253 1.272
(+1.5%)
.02 .20
V
%
.04 .20 %
5 10 mA
6 10 mA
30 60 mA
33 70 mA
80 180 mA
60 120 µA
10.1 11.0
A
8.0 9.5
A
60 80
dB
0.002
%/W
1.00 1.15
1.00 1.15
1.00 1.15
1.00 1.15
1.25 1.40
V
V
V
V
V
.10 .15 V
.15 .20 V
.20 .30 V
.26 .40 V
.65 .80 V
0.003
0.5
%VOUT
%
150 180 210 ¡C
25 ¡C
50 mA
2



CS52510-1
Electrical Characteristics: 0¡C²TA ² 70¡C, 0¡C²TJ ² 150¡C, VSENSE = VOUT and VAdj = 0V unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
VPOWER Supply Only
Output Current
VPOWER = 6V, VCONTROL not connected,
VADJUST = VOUT = VSENSE = 0V
0.1 1 mA
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor
divider used to set the output voltage is selected to meet the minimum load current requirement.
The control pin current is the drive current required for the output transistor. This current will track output current with
roughly a 1:100 ratio. The minimum value is equal to the quiescent current of the device.
This parameter is guaranteed by design and is not 100% production tested.
Dropout is defined as either minimum control voltage (VCONTROL) or minimum power voltage (VPOWER) to output voltage dif-
ferential required to maintain 1.5% regulation at a particular load.
This parameter is guaranteed by design, but not parametrically tested in production. However, a 100% thermal shutdown
functional test is performed on each part.
PACKAGE PIN #
5L TO-220
1
PIN SYMBOL
VSENSE
2 Adjust
3 VOUT
4 VCONTROL
5 VPOWER
Package Pin Description
FUNCTION
This Kelvin sense pin allows for remote sensing of the output voltage at the load
for improved regulation. It is internally connected to the positive input of the
voltage sensing error amplifier.
This pin is connected to the low side of the internally trimmed 1.5% bandgap refer-
ence voltage and carries a bias current of about 50µA. A resistor divider from Adj
to VOUT and from Adj to ground sets the output voltage. Also, transient response
can be improved by adding a small bypass capacitor from this pin to ground.
This pin is connected to the emitter of the power pass transistor and provides a
regulated voltage capable of sourcing 10A of current.
This is the supply voltage for the regulator control circuitry. For the device to
regulate, this voltage should be between 1V and 1.4V (depending on the output
current) greater than the output voltage. The control pin current will be about 1%
of the power pin output current .
This is the power input voltage. This pin is physically connected to the collector of
the power pass transistor. For the device to regulate, this voltage should be
between 0.1V and .8V greater than the output voltage depending on output cur-
rent. The output load current of 10A is supplied through this pin.
V
POWER
V
CONTROL
Block Diagram
BIAS
and
TSD
VREF
- EA
+
IA
+
-
3
VOUT
VSENSE
Adjust







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