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參數(shù)資料
| 型號： | NCP4561SN28T1 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | ULTRA LOW-NOISE LOW DROPOUT VOLTAGE REGULATOR WITH 1.0 ON/OFF CONTROL |
| 中文描述： | 2.8 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PDSO5 |
| 封裝： | PLASTIC, TSOP-5 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 134K |
| 代理商： | NCP4561SN28T1 |
Semiconductor Components Industries, LLC, 2002
May, 2002 – Rev. 2
1
Publication Order Number:
NCP4561/D
NCP4561
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 VRMS noise level
without
an
external bypass capacitor. Housed in a small SOT–23 5 leads–like
package, it represents the ideal designer’s choice when space and
noise are at premium.
The absence of external bandgap capacitor unleashes the response
time to a wake–up signal and makes it stay within 40 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 –75 dB, it naturally
shields the downstream electronics against choppy lines.
Features
Ultra Low–Noise: 150 nV/
√
Hz @ 100 Hz, 40 VRMS 100 Hz –
100 kHz Typical, Iout = 60 mA, C
o
= 1.0 F
Fast Response Time from OFF to ON: 40 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
°
C
Thermal Shutdown
Applications
Noise Sensitive Circuits: VCOs RF Stages, etc.
Bursting Systems (TDMA Phones)
All Battery Operated Devices
Figure 1. Simplified Block Diagram
Thermal
Shutdown
On/Off
Band Gap
Reference
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
V
out
V
in
GND
NC
ON/
OFF
4
5
2
3
1
TSOP–5
SN SUFFIX
CASE 483
1
5
PIN CONNECTIONS AND
MARKING DIAGRAM
1
3
V
out
ON/OFF
2
GND
NC
4
V
in
5
P28 = Device Code
Y
= Year
W
= Work Week
(Top View)
P
Device
Voltage
Output*
Shipping
ORDERING INFORMATION
NCP4561SN28T1
2.8 V
3000/Tape & Reel
* Contact your ON Semiconductor sales
representative for other output voltage values.
http://onsemi.com
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