NCP4561
Advance Information
Ultra Low-Noise Low
Dropout Voltage Regulator
with 1.0 V ON/OFF Control
The NCP4561 is a Low DropOut (LDO) regulator featuring
excellent noise performances. Thanks to its innovative concept, the
circuit reaches an incredible 40
碌VRMS
noise level
without
an
external bypass capacitor. Housed in a small SOT鈥?3 5 leads鈥搇ike
package, it represents the ideal designer鈥檚 choice when space and
noise are at premium.
The absence of external bandgap capacitor unleashes the response
time to a wake鈥搖p signal and makes it stay within 40
碌s
(in repetitive
mode), pushing the NCP4561 as a natural candidate in portable
applications.
The NCP4561 also hosts a novel architecture which prevents
excessive undershoots when the regulator is the seat of fast transient
bursts, as in any bursting systems.
Finally, with a static line regulation better than 鈥?5 dB, it naturally
shields the downstream electronics against choppy lines.
Features
http://onsemi.com
5
1
TSOP鈥?
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
ON/OFF
GND
NC
1
P28YW
2
3
(Top View)
P28 = Device Code
Y
= Year
W = Work Week
5
V
in
鈥?/div>
Ultra Low鈥揘oise: 150 nV/鈭欻z @ 100 Hz, 40
碌VRMS
100 Hz 鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
100 kHz Typical, Iout = 60 mA, C
o
= 1.0
碌F
Fast Response Time from OFF to ON: 40
碌s
Typical at a 200 Hz
Repetition Rate
Ready for 1.0 V Platforms: ON with a 900 mV High Level
Nominal Output Current of 80 mA with a 100 mA Peak Capability
Typical Dropout of 90 mV @ 30 mA, 160 mV @ 80 mA
Ripple Rejection: 70 dB @ 1.0 kHz
1.5% Output Precision @ 25擄C
Thermal Shutdown
4
V
out
Applications
ORDERING INFORMATION
Device
NCP4561SNT1鈥?8
Voltge
Output*
2.8 V
Shipping
3000/Tape & Reel
鈥?/div>
Noise Sensitive Circuits: VCOs RF Stages, etc.
鈥?/div>
Bursting Systems (TDMA Phones)
鈥?/div>
All Battery Operated Devices
ON/
OFF
NC
On/Off
Band Gap
Reference
V
out
5
Thermal
Shutdown
V
in
* Contact your ON Semiconductor sales
representative for other output voltage values.
1
3
4
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
GND
2
Figure 1. Simplified Block Diagram
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
漏
Semiconductor Components Industries, LLC, 2001
1
February, 2001 鈥?Rev. 0
Publication Order Number:
NCP4561/D
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