MC33761 Datasheet, PDF (1/14 Pages) ON Semiconductor – Ultra Low-Noise Low Dropout Voltage Regulator with 1V ON/OFF Control

MC33761
Ultra Low−Noise Low
Dropout Voltage Regulator
with 1.0 V ON/OFF Control
The MC33761 is an Low DropOut (LDO) regulator featuring
excellent noise performances. Thanks to its innovative design, the
circuit reaches an impressive 40 mVRMS 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
accelerates the response time to a wake−up signal and keeps it within
40 ms (in repetitive mode), making the MC33761 as a natural
candidate for portable applications.
The MC33761 also hosts a novel architecture which prevents
excessive undershoots in the presence 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 mVRMS
100 Hz−100 kHz Typical, I_out = 60 mA, Co = 1.0 mF
• Fast Response Time from OFF to ON: 40 ms 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
• V_out Available at 2.5 V, 2.8 V, 2.9 V, 3.0 V, 5.0 V
• Operating Range from −40 to +85°C
• Dual Version is Available as MC33762
• Pb−Free Package May be Available. The G−Suffix Denotes a
Pb−Free Lead Finish
Applications
• Noise Sensitive Circuits: VCOs RF Stages, etc.
• Bursting Systems (TDMA Phones)
• All Battery Operated Devices
ON/
OFF ³
On/Off
NC
4
Band Gap
Reference
Thermal
Shutdown
1 ^Vin
GND
*Current Limit
*Antisaturation Protection
*Load Transient Improvement
2
Figure 1. Simplified Block Diagram
5 ^Vout
http://onsemi.com
5
1
THIN SOT−23−5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
V_in ¹
GND ²
5 _Vout
ON/OFF ³
4 _NC
(Top View)
xx = Version
Y = Year
W = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2004
1
January, 2004 − Rev. 7
Publication Order Number:
MC33761/D