CS5253B-1GDPR5G datasheet(3/10 Pages) ONSEMI

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CS5253B−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

Test Conditions

Min

Typ

Max

Unit

VCONTROL Dropout Voltage

(Minimum VCONTROL − VOUT)

(Note 5)

VPOWER = 2.05 V, IOUT = 100 mA

VPOWER = 2.05 V, IOUT = 1.0 A

VPOWER = 2.05 V, IOUT = 3.0 A

−

0.90

1.00

1.05

1.15

1.30

VPOWER Dropout Voltage

(Minimum VPOWER − VOUT)

(Note 5)

VCONTROL = 2.75 V, IOUT = 100 mA

VCONTROL = 2.75 V, IOUT = 1.0 A

VCONTROL = 2.75 V, IOUT = 3.0 A

−

0.05

0.15

0.40

0.15

0.25

0.60

RMS Output Noise

Freq = 10 Hz to 10 kHz, TA = 25°C

−

0.003

−

%VOUT

Temperature Stability

−

0.5

−

Thermal Shutdown (Note 6)

−

150

180

210

°C

Thermal Shutdown Hysteresis

−

°C

VCONTROL Supply Only Output

Current

VCONTROL = 13 V, VPOWER Not Connected,

VADJ = VOUT = VSENSE = 0 V

−

VPOWER Supply Only Output

Current

VPOWER = 6.0 V, VCONTROL Not Connected,

VADJ = VOUT = VSENSE = 0 V

−

0.1

1.0

5. Dropout is defined as either the minimum control voltage (VCONTROL) or minimum power voltage (VPOWER) to output voltage differential

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

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 #

Symbol

Function

VSENSE

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.

Adjust

This pin is connected to the low side of the internally trimmed 1.0% bandgap reference voltage 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.

VOUT

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.

VCONTRO

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

tween 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.

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 0.6 V greater than the output voltage depending

on the output current. The output load current of 3.0 A is supplied through this pin.

Figure 2. Block Diagram

−

BIAS

and

TSD

VREF

VOUT

VSENSE

Adjust

VPOWER

VCONTROL

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