CS5253B-8GDPR5G ON Semiconductor, CS5253B-8GDPR5G Datasheet - Page 6

• Manufacturer Part Number: CS5253B-8GDPR5G
• Description: IC REG LDO LIN 3A 2.5V D2PAK-5
• Manufacturer: ON Semiconductor

Specifications of CS5253B-8GDPR5G

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.5V
• Voltage - Input: Up to 13V
• Voltage - Dropout (typical): 1.05V @ 3A
• Number Of Regulators: 1
• Current - Output: 3A
• Current - Limit (min): 3.1A
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-5, D²Pak (5 leads + Tab), TO-263BA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CS5253B-8GDPR5GOSCT

currents up to 3.0 A. The regulator is protected against short
circuits, and includes a thermal shutdown circuit with
hysteresis. The output, which is current limited, consists of
a PNP−NPN transistor pair and requires an output capacitor
for stability.
V
maximize efficiency. The collector of the power device is
brought out to the V
dissipation under high current loads. V
for the control circuitry and the drive for the output NPN
transistor. V
the output voltage. Special care has been taken to ensure that
there are no supply sequencing problems. The output
voltage will not turn on until both supplies are operating. If
the control voltage comes up first, the output current will be
limited to about three milliamperes until the power input
voltage comes up. If the power input voltage comes up first,
the output will not turn on at all until the control voltage
comes up. The output can never come up unregulated.
with the control and power inputs tied together. In this mode,
the dropout will be determined by the minimum control
voltage.
Output Voltage Sensing
dedicated V
sensing of the output voltage. This feature can virtually
eliminate errors in the output voltage due to load regulation.
Regulation will be optimized at the point where the sense pin
is tied to the output.
POWER
The CS5253B−8 linear regulator is fixed at 2.5 V at
The CS5253B−8 utilizes a two supply approach to
The CS5253B−8 can also be used as a single supply device
The CS5253B−8 five terminal linear regulator includes a
Function
CONTROL
SENSE
THEORY OF OPERATION
function. This allows for true Kelvin
POWER
should be at least 1.0 V greater than
pin to minimize internal power
6
5
4
3
2
1
0
0
10
CONTROL
V
V
I
LOAD
POWER
CONTROL
20
Figure 15. Stability vs ESR
= 0 to 3.0 A
APPLICATIONS NOTES
30
= 3.3 V
provides
= 5.0 V
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Capacitance (mF)
Stable Region
40
Unstable
50
V
V
T
6
J
OUT
OUT
= 0°C to 150°C
Remote Sense
CS5253B−8 but some care must be paid to the layout and
positioning of the filter capacitors around the part. The
ground side of the input capacitors on the +5.0 V and +3.3 V
lines and the local V
IC must be tied close to the ground pin of the regulator. This
will establish the stability of the part. The IC ground may
then be connected to ground remotely at the load, giving the
ground portion remote sense operation.
load connection, giving the feedback remote sense
operation. The remote sense lines should be Kelvin
connected so as to eliminate the effect of load current
voltage drop. An optional bypass capacitor may be used at
the load to reduce the effect of load variations and spikes.
Current Limit
under excessive load conditions.
Short Circuit Protection
clamps the output current at approximately 500mA less than
its current limit value. This provides for a current foldback
function, which reduces power dissipation under a direct
shorted load.
Thermal Shutdown
activate above a die junction temperature of approximately
150°C and to shut down the regulator output. This circuitry
has 25°C of typical hysteresis, thereby allowing the
regulator to recover from a thermal fault automatically.
60
= 2.5 V
Shorted to V
Remote sense operation can be easily obtained with the
The V
The internal current limit circuit limits the output current
The device includes short circuit protection circuitry that
The thermal shutdown circuitry is guaranteed by design to
70
SENSE
80
SENSE
line can then be tied remotely at the positive
90 100
DESIGN GUIDELINES
OUT
−to−ground output capacitor on the