NCP508 Datasheet, PDF (1/15 Pages) ON Semiconductor – Very Low Noise, Fast Turn On, 50 mA Low Dropout Voltage Regulator

NCP508
Very Low Noise, Fast Turn
On, 50 mA Low Dropout
Voltage Regulator
The NCP508 is a 50 mA low noise voltage regulator, designed to
exhibit fast turn on time and high ripple rejection. Each device
contains a voltage reference unit, an error amplifier, a PMOS power
transistor, resistors for setting output voltage, current limit, and
temperature limit protection circuits.
The NCP508 has been designed for use with ceramic capacitors.
The device is housed in SC−88A and WDFN6 1.5x1.5 packages.
Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3. Other
voltages are available in 100 mV steps.
Features
• Very Low Noise at 39 mVrms without a Bypass Capacitor
• High Ripple Rejection of 70 dB at 1 kHz
• Low Dropout Voltage of 140 mV (typ) at 30 mA
• Tight Load Regulation, typically 6 mV for DI_out = 50 mA
• Fast Enable Turn−On time of 20 msec
• Logic Level Enable
• ESR can vary from a few mW to 3 W
• These are Pb−Free Devices
Typical Applications
• RF Subsystems in Handsets
• Noise Sensitive Circuits; VCOs, PLL
Battery or
Unregulated
1
5
Voltage C1
1m
2
ON
OFF
3
4
Figure 1. Typical Application Diagram
V_out
C2
1m
http://onsemi.com
4
5
123
SC70−5/SC−88A/SOT−353
SQ SUFFIX
CASE 419A
MARKING
DIAGRAM
5
xxx MG
G
1
XXX = Specific Device Code
M
= Date Code*
G
= Pb−Free Package
(Note: Microdot may be in either location)
*Date Code orientation and/or position may
vary depending upon manufacturing location.
WDFN6
MN SUFFIX
CASE 511BJ
1
XX MG
XX = Specific Device Code
M = Date Code
G = Pb−Free Package
PIN CONNECTIONS
V_in 1
GND 2
5 V_out
Enable 3
4 NC
SC−88A
(Top View)
V_out 1
NC 2
GND 3
6 V_in
5 ^NC
4 Enable
WDFN6
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2010
1
May, 2010 − Rev. 3
Publication Order Number:
NCP508/D