ON Semiconductor CS5253B-1 Technical data

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CS5253B−1

3.0 A LDO 5−Pin Adjustable
Linear Regulator with
Remote Sense Applications

This new very low dropout linear regulator reduces total power
dissipation in the application. To achieve very low dropout, the
internal pass transistor is powered separately from the control
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 minimum
control voltage.

The CS5253B−1 is offered in a five−terminal D
which allows for the implementation of a remote−sense pin permitting
very accurate regulation 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 less than 1.0 mV for an output voltage of 2.5 V with a load step
of 10 mA to 3.0 A.

The CS5253B−1 has a very fast transient loop response which can
be adjusted using a small capacitor on the Adjust pin.

Internal protection circuitry provides for “bust−proof” operation,
similar to three−terminal regulators. This circuitry, which includes
overcurrent, short circuit, and overtemperature protection will
self protect the regulator under all fault conditions.

The CS5253B−1 is ideal for generating a 2.5 V supply to power
graphics controllers used on VGA cards. Its remote sense and low
value capacitance requirements make this a low cost, high
performance solution. The CS5253B−1 is optimized from the
CS5253−1 to allow a lower value of output capacitor to be used at the
expense of a slower transient response.

2

PAK−5 package,

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1

5

D2PAK−5

DP SUFFIX

CASE 936AC

MARKING DIAGRAM

5253B−1

AWLYWW

1

A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week

Tab = V
Pin 1. V

2. Adjust

3. V

4. V

5. V

CS

OUT

SENSE

OUT
CONTROL
POWER

Features

• Pb−Free Package is Available*

• V

• V

• V

Range is 1.25 V to 5.0 V @ 3.0 A

OUT

Dropout < 0.40 V @ 3.0 A

POWER
CONTROL

Dropout < 1.05 V @ 3.0 A

• 1.0% Trimmed Reference

• Fast Transient Response

• Remote Voltage Sensing

• Thermal Shutdown

• Current Limit

• Short Circuit Protection

• Drop−In Replacement for EZ1582

• Backwards Compatible with 3−Pin Regulators

• Very Low Dropout Reduces Total Power Consumption

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.

 Semiconductor Components Industries, LLC, 2004

June, 2004 − Rev. 5

1 Publication Order Number:

ORDERING INFORMATION

Device Package Shipping

CS5253B−1GDP5 D2P AK−5 50 Units/Rail
CS5253B−1GDPR5 D
CS5253B−1GDPR5G D2PAK−5

†For information on tape and reel specifications,

including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.

2

P AK−5 750 Tape & Reel

(Pb−Free)

750 Tape & Reel

CS5253B−1/D

†

CS5253B−1

5.0 V
V

CONTROL

V

OUT

R

DIS

2.5 V @ 3.0 A

CS5253B−1

GND

3.3 V

10 F
10 V

V

POWER

100 F

5.0 V

V

SENSE

Adjust

33 F

124

5.0 V

124

C

LOAD

(Optional)

GND

R

DIS

Figure 1. Application Diagram

MAXIMUM RATINGS

Rating Value Unit

V

Input Voltage 6.0 V

POWER

V

CONTROL

Operating Junction Temperature Range, T
Storage Temperature Range −65 to +150 °C
ESD Damage Threshold 2.0 kV
Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 230 peak °C

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously . If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.

1. 60 second maximum above 183°C.

Input Voltage 13 V

J

0 to 150 °C

ELECTRICAL CHARACTERISTICS (0°C ≤ T

≤ 70°C; 0°C ≤ TJ ≤ 150°C; V

A

SENSE

= V

OUT

and V

= 0 V; unless

ADJ

otherwise specified)

Characteristic Test Conditions Min Typ Max Unit

Reference Voltage V

Line Regulation V

Load Regulation V

Minimum Load Current (Note 2) V
Control Pin Current (Note 3) V

Adjust Pin Current V
Current Limit V
Short Circuit Current V
Ripple Rejection (Note 4) V

CONTROL

CONTROL

CONTROL

CONTROL
CONTROL

V

CONTROL
CONTROL

CONTROL
CONTROL
CONTROL

= 2.75 V to 12 V, V

I

= 10 mA to 3.0 A

OUT

= 2.5 V to 12 V, V

I

= 10 mA

OUT

= 2.75 V, V

I

= 10 mA to 3.0 A, with Remote Sense

OUT

= 5.0 V, V

POWER

= 2.75 V, V
= 2.75 V, V

= 2.75 V, V
= 2.75 V, V
= 2.75 V, V
= V

120 Hz, I

POWER

= 3.0 A, C

OUT

POWER

POWER

= 2.05 V,

POWER

= 3.3 V, V

= 2.05 V, I

POWER

= 2.05 V, I

POWER

= 2.05 V, I

POWER

= 2.05 V, V

POWER

= 2.05 V, V

POWER

= 3.25 V, V

= 0.1 F

ADJ

RIPPLE

= 2.05 V to 5.5 V,

1.237

1.250 1.263

(−1.0%)

= 1.75 V to 5.5 V,

− 0.02 0.2 %

− 0.04 0.3 %

= +1.0% − 5.0 10 mA

OUT

= 100 mA

OUT

= 3.0 A

OUT

= 10 mA − 60 120 A

OUT

= −4.0% 3.1 4.0 − A

OUT

= 0 V 2.0 3.5 − A

OUT

= 1.0 V

P−P

@

−

−

6.0
35

60 80 − dB

(+1.0%)

10

120

V

mA
mA

Thermal Regulation 30 ms Pulse, TA = 25°C − 0.002 − %/W

2. 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.

3. The V

CONTROL

ratio. The minimum value is equal to the quiescent current of the device.

pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:100

4. This parameter is guaranteed by design and is not 100% production tested.

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2

CS5253B−1

ELECTRICAL CHARACTERISTICS (continued) (0°C ≤ T

≤ 70°C; 0°C ≤ TJ ≤ 150°C; V

A

SENSE

= V

OUT

and V

= 0 V; unless

ADJ

otherwise specified.)

Characteristic

V

CONTROL

V

POWER

Dropout Voltage
(Minimum V
(Note 5)

Dropout Voltage
(Minimum V
(Note 5)

CONTROL

POWER

− V

− V

OUT

OUT

V

= 2.05 V, I

)

)

POWER

V

POWER

V

POWER

V

CONTROL

V

CONTROL

V

CONTROL

= 2.05 V, I
= 2.05 V, I

RMS Output Noise Freq = 10 Hz to 10 kHz, TA = 25°C − 0.003 − %V

Test Conditions Min Typ Max Unit

= 2.75 V, I
= 2.75 V, I
= 2.75 V, I

= 100 mA

OUT

= 1.0 A

OUT

= 3.0 A

OUT

OUT
OUT
OUT

= 100 mA
= 1.0 A
= 3.0 A

−

−

−

−

−

−

0.90

1.00

1.05

0.05

0.15

0.40

1.15

1.15

1.30

0.15

0.25

0.60

V
V
V

V
V
V

OUT

Temperature Stability − 0.5 − − %
Thermal Shutdown (Note 6) − 150 180 210 °C
Thermal Shutdown Hysteresis − − 25 − °C
V

CONTROL

V

POWER

5. Dropout is defined as either the minimum control voltage (V

Supply Only Output

Current

Supply Only Output
Current

required to maintain 1.0% regulation at a particular load current.

V

CONTROL

V

ADJ

V

POWER

V

ADJ

= 13 V, V

= V

OUT

= 6.0 V, V

= V

OUT

= V

= V

POWER

SENSE

CONTROL

SENSE

CONTROL

Not Connected,

= 0 V

Not Connected,

= 0 V

) or minimum power voltage (V

− − 50 mA

− 0.1 1.0 mA

) to output voltage differential

POWER

6. 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 DESCRIPTION

Package

Pin #

1 V

2 Adjust This pin is connected to the low side of the internally trimmed 1.0% bandgap reference voltage and carries a bias

3 V

4 V

5 V

Pin

Symbol

SENSE

OUT

CONTRO

L

POWER

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.

current of about 50 A. A resistor divider from Adjust to V
Also, transient response can be improved by adding a small bypass capacitor from this pin to ground.

and from Adjust to ground sets the output voltage.

OUT

This pin is connected to the emitter of the power pass transistor and provides a regulated voltage capable of
sourcing 3.0 A of current.

This is the supply voltage for the regulator control circuitry. For the device to regulate, this voltage should be be­tween 0.9 V and 1.3 V (depending on the output current) greater than the output voltage. The control pin current
will be about 1.0% of the 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 0.1 V and 0.6 V greater than the output voltage depending
on the output current. The output load current of 3.0 A is supplied through this pin.

V

POWER

V

CONTROL

BIAS

and

TSD

EA IA

V

REF

−
+

Figure 2. Block Diagram

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3

+

−

V

OUT

V

SENSE

Adjust