CS5257A-1GT5 datasheet(3/11 Pages) ONSEMI

Teilenummer	CS5257A-1GT5

Bauteilbeschribung	7.0 A LDO 5?뭁in Adjustable Linear Regulator

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CS5257A−1

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ELECTRICAL CHARACTERISTICS (continued) (0°C ≤ TA ≤ 70°C; 0°C ≤ TJ ≤ 150°C; VSENSE = VOUT and VADJ = 0 V; unless

otherwise specified.)

Characteristic

Unit

Max

Typ

Min

Test Conditions

CS5257A−1

Short Circuit Current

VCONTROL = 2.75 V, VPOWER = 2.05 V, VOUT = 0 V

5.0

9.0

−

A

Ripple Rejection (Note 6)

VCONTROL = VPOWER = 3.25 V

VRIPPLE = 1.0 VP−P @ 120 Hz, IOUT = 4.0 A,

CADJ = 0.1 mF

60

80

−

dB

Thermal Regulation

30 ms Pulse, TA = 25°C

−

0.002

−

%/W

VCONTROL Dropout Voltage

(Minimum VCONTROL − VOUT)

(Note 7)

VPOWER = 2.05 V, IOUT = 100 mA

VPOWER = 2.05 V, IOUT = 1.0 A

VPOWER = 2.05 V, IOUT = 2.75 A

VPOWER = 2.05 V, IOUT = 4.0 mA

VPOWER = 2.05 V, IOUT = 7.0 A

−

1.00

1.10

1.15

1.25

V

VPOWER Dropout Voltage

(Minimum VPOWER − VOUT)

(Note 7)

VCONTROL = 2.75 V, IOUT = 100 mA

VCONTROL = 2.75 V, IOUT = 1.0 A

VCONTROL = 2.75 V, IOUT = 2.75 A

VCONTROL = 2.75 V, IOUT = 4.0 mA

VCONTROL = 2.75 V, IOUT = 7.0 A

−

0.10

0.15

0.20

0.26

0.35

0.15

0.20

0.30

0.40

0.65

V

RMS Output Noise

Freq = 10 Hz to 10 kHz, TA = 25°C

−

0.003

−

%VOUT

Temperature Stability

−

0.5

−

%

Thermal Shutdown (Note 8)

−

150

180

210

°C

Thermal Shutdown Hysteresis

−

25

°C

VCONTROL Supply Only Output

Current

VCONTROL = 13 V, VPOWER Not Connected,

VADJ = VOUT = VSENSE = 0 V

−

50

mA

VPOWER Supply Only Output

Current

VPOWER = 6.0 V, VCONTROL Not Connected,

VADJ = VOUT = VSENSE = 0 V

−

0.1

1.0

mA

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

7. Dropout is defined as either minimum control voltage (VCONTROL) or minimum power voltage (VPOWER) to output voltage differential re-

quired to maintain 1.5% regulation at a particular load.

8. 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 #

PIN SYMBOL

FUNCTION

TO−220−5D2PAK−5

1

VSENSE

This Kelvin sense pin allows for remote sensing of the output voltage at the load for im-

proved regulation. It is internally connected to the positive input of the voltage sensing error

amplifier.

2

Adjust

This pin is connected to the low side of the internally trimmed 1.5% bandgap reference volt-

age and carries a bias current of about 50 mA. A resistor divider from Adjust to VOUT and

from Adjust to ground sets the output voltage. Also, transient response can be improved by

adding a small bypass capacitor from this pin to ground.

3

VOUT

This pin is connected to the emitter of the power pass transistor and provides a regulated

voltage capable of sourcing 7.0 A of current.

4

VCONTROL

This is the supply voltage for the regulator control circuitry. For the device to regulate, this

voltage should be between 1.0 V and 1.25 V (depending on the output current) greater than

the output voltage. The control pin current will be about 1.0% of the power pin output current.

5

VPOWER

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 0.65 V

greater than the output voltage depending on the output current. The output load current of

7.0 A is supplied through this pin.

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