CS5253B-1 datasheet(6/10 Pages) ONSEMI | 3.0 A LDO 5-Pin Adjustable Linear Regulator with Remote Sense Applications

6 page

CS5253B−1

http://onsemi.com

Figure 15. VPOWER Only Output Current vs Junction

Temperature

Figure 16. VCONTROL Supply Current vs Junction

Temperature

Figure 17. Current Limit vs VOUT

Figure 18. Stability vs ESR

020

140

Junction Temperature (

°C)

120

100

VPOWER = 6.0 V

VOUT = 0 V

VCONTROL Not Connected

020

140

Junction Temperature (

°C)

120

100

VCONTROL = 2.75 V

VPOWER = 2.05 V

IOUT = 3.0 A

IOUT = 1.0 A

IOUT = 100 mA

5.0

4.5

4.0

3.5

0.5

1.0

1.5

2.0

3.0

2.5

VOUT (V)

VPOWER = 3.3 V

VCONTROL = 5.0 V

VOUT set for 2.5 V

TA = 25°C

010

Capacitance (

mF)

100

VPOWER = 3.3 V

VCONTROL = 5.0 V

ILOAD = 0 to 3.0 A

Unstable

Stable Region

VOUT = 2.5 V

VOUT Shorted to VSENSE

TJ = 0°C to 150°C

APPLICATIONS NOTES

THEORY OF OPERATION

The CS5253B−1 linear regulator provides adjustable

voltages from 1.25 V to 5.0 V at 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. A detailed

procedure for selecting this capacitor is included in the

Stability Considerations section.

VPOWER Function

The CS5253B−1 utilizes a two supply approach to

maximize efficiency. The collector of the power device is

brought out to the VPOWER pin to minimize internal power

dissipation under high current loads. VCONTROL provides

for the control circuitry and the drive for the output NPN

transistor. VCONTROL should be at least 1.0 V greater than

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.

The CS5253B−1 can also be used as a single supply device

with the control and power inputs tied together. In this mode,

the dropout will be determined by the minimum control

voltage.

Output Voltage Sensing

The CS5253B−1 five terminal linear regulator includes a

dedicated VSENSE function. This allows for true Kelvin

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.

Número de Pieza	Descripción de Componentes	Html View	Fabricante
CS2001	1.2 A Switching Regulator and 5.0 V 100 mA Linear Regulator with RESET	1 2 3 4 5 More	ON Semiconductor
TPS732XX	Cap-Free NMOS 250mA Low Dropout Regulator with Reverse Current Protection	1 2 3 4 5 More	Texas Instruments
ADD8708	18-Channel Gamma Buffer with Regulator	1 2 3 4 5 More	Analog Devices
PTH08T241W	10-A 4.5-V to 14-V INPUT NON-ISOLATED WIDE-OUTPUT ADJUSTABLE POWER MODULE WITH TURBOTRANS	1 2 3 4 5 More	Texas Instruments
SI6862DQ	Dual N-Channel 20-V D-S MOSFET with Current Sense	1 2 3 4 5 More	Vishay Siliconix
OMR9807SC	200 Krad Si Ultra Low Dropout Linear Regulator Hermetic Package	1 2 3 4 5	International Rectifier
LM79LXX	100mA Negative Voltage Regulator	1 2 3 4	List of Unclassifed Manufacturers
MN54ACTQ574-X	Octal D Flip-Flop with TRI-STATE Outputs	1 2 3 4 5 More	National Semiconductor
LVA519	Sync Separator with AFC Monolithic IC	1 2 3 4 5 More	Mitsumi Electronics, Corp.

Número de Pieza relacionado

Enlace URL

Patrocinador de Alldatasheet