NCP4561SN28T1 datasheet(7/16 Pages) ONSEMI

Part #	NCP4561SN28T1

Description	ULTRA LOW-NOISE LOW DROPOUT VOLTAGE REGULATOR WITH 1.0 ON/OFF CONTROL

Download	16 Pages

Scroll/Zoom	100%

Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

Logo

7 / 16 page

NCP4561

http://onsemi.com

7

APPLICATION HINTS

Input Decoupling

As with any regulator, it is necessary to reduce the

dynamic impedance of the supply rail that feeds the

component. A 1.0

mF capacitor either ceramic or tantalum is

recommended and should be connected close to the

NCP4561 package. Higher values will correspondingly

improve the overall line transient response.

Output Decoupling

Thanks to a novel concept, the NCP4561 is a stable

component and does not require any specific Equivalent

Series Resistance (ESR) neither a minimum output current.

Capacitors exhibiting ESRs ranging from a few m

W up to

3.0

W can thus safely be used. The minimum decoupling

value is 1.0

mF and can be augmented to fulfill stringent load

transient requirements. The regulator accepts ceramic chip

capacitors as well as tantalum devices.

Noise Decoupling

Unlike other LDOs, the NCP4561 is a true low–noise

regulator. Without the need of an external bypass capacitor,

it typically reaches the incredible level of 40

mVRMS overall

noise between 100 Hz and 100 kHz. To give maximum

insight on noise specifications, ON Semiconductor includes

spectral density graphics. The classical bypass capacitor

impacts the start–up phase of standard LDOs. However,

thanks to its low–noise architecture, the NCP4561 operates

without a bypass element and thus offers a typical 40

ms

start–up phase.

Protections

The NCP4561 hosts several protections, giving natural

ruggedness and reliability to the products implementing the

component. The output current is internally limited to a

maximum value of 180 mA typical while temperature

shutdown occurs if the die heats up beyond 125

°C. These

values let you assess the maximum differential voltage the

device can sustain at a given output current before its

protections come into play.

The maximum dissipation the package can handle is given

by:

Pmax +

T

Jmax *

T

A

RqJA

If TJmax is limited to 125°C, then the NCP4561 can

dissipate up to 470 mW @ 25

°C. The power dissipated by

the NCP4561 can be calculated from the following formula:

Ptot

+ V

in

I

gnd

(Iout) ) Vin * Vout

Iout

or

Vinmax +

Ptot

) V

out

Iout

I

gnd )

Iout

If a 80 mA output current is needed, the ground current is

extracted from the data–sheet curves: 4.0 mA @ 80 mA. For

a NCP4561SN28T1 (2.8 V) delivering 80 mA and operating

at 25

°C, the maximum input voltage will then be 8.3 V.

Similar Part No. - NCP4561SN28T1

Manufacturer	Part #	Datasheet	Description
ON Semiconductor	NCP456	154Kb / 13P	2 A Single Load Switch for Low Voltage Rail December, 2014 ??Rev. 1
	NCP456RFCCT2G	154Kb / 13P	2 A Single Load Switch for Low Voltage Rail December, 2014 ??Rev. 1
	NCP456	154Kb / 13P	2 A Single Load Switch for Low Voltage Rail December, 2014 ??Rev. 1

More results

Similar Description - NCP4561SN28T1

Manufacturer	Part #	Datasheet	Description
ON Semiconductor	MC33762	218Kb / 16P	Dual Ultra Low-Noise Low Dropout Voltage Regulator with 1.0 V ON/OFF Control July, 2003 ??Rev. 4
	MC33761	204Kb / 14P	Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control January, 2004 ??Rev. 7
	MC33761SNT1-030G	408Kb / 13P	Ultra Low?묿oise Low Dropout Voltage Regulator with 1.0 V ON/OFF Control July, 2006 ??Rev. 8
	MC33263	269Kb / 12P	Ultra Low Noise 150 mA Low Dropout Voltage Regulator with ON/OFF Control April, 2000 ??Rev. 2
	NCP623	148Kb / 14P	Ultra Low Noise 150 mA Low Dropout Voltage Regulator with ON/OFF Control August, 2004 ??Rev. 0
	NCP623	212Kb / 16P	Ultra Low Noise 150 mA Low Dropout Voltage Regulator with ON/OFF Control September, 2006 ??Rev. 7
New Japan Radio	NJM2386	177Kb / 9P	LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL
	NJM2388F12	175Kb / 9P	LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL
	NJM2370	214Kb / 8P	LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL
	NJM2396	513Kb / 6P	LOW DROPOUT VOLTAGE REGULATOR WITH ON/OFF CONTROL

More results

NCP4561SN28T1 Datasheet(PDF) 7 Page - ON Semiconductor

NCP4561SN28T1 Datasheet(HTML) 7 Page - ON Semiconductor

Similar Part No. - NCP4561SN28T1

Similar Description - NCP4561SN28T1

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Datasheet Download

Link URL