MIC5255-3.3YML

Manufacturer Part NumberMIC5255-3.3YML
ManufacturerMicrel Inc
MIC5255-3.3YML datasheet
 
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
Page 1/13

Download datasheet (949Kb)Embed
Next
General Description
The MIC5255 is an efficient, precise CMOS voltage
regulator optimized for ultra-low-noise applications. It
offers 1% initial accuracy, extremely-low dropout voltage
(135mV at 150mA) and low ground current (typically
90µA). The MIC5255 provides a very-low-noise output,
ideal for RF applications where a clean voltage source is
required. A noise bypass pin is also available for further
reduction of output noise.
Designed specifically for handheld and battery-powered
devices, the MIC5255 provides a TTL-logic-compatible en-
able pin. When disabled, power consumption drops nearly
to zero.
The
MIC5255
also
works
capacitors, reducing the amount of board space necessary
for power applications, critical in handheld wireless
devices.
Key features include current limit, thermal shutdown, faster
transient response, and an active clamp to speed up
device turn-off. Available in the 6-pin 2mm × 2mm MLF
®
package, the IttyBitty
SOT-23-5 package and the new
Thin SOT-23-5, which offers the same footprint as the
®
standard IttyBitty
SOT-23-5, but only 1mm tall. The
MIC5255 offers a range of output voltages.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
MIC5255-x.x_M5
V
C
= 1.0µF
IN
1
5
IN
Ceramic
2
3
4
Enable
Shutdown
EN
EN (pin 3) may be
connected directly
to IN (pin 1).
IttyBitty is a registered trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
November 2006
Features
• Input voltage range: 2.7V to 6.0V
• Thin SOT package: 1mm height SOT-23-5
• Ultra-low output noise: 30µV(rms)
• Stability with ceramic output capacitors
• Ultra-low dropout: 135mV @ 150mA
• High output accuracy:
• Low quiescent current: 90µA
• Tight load and line regulation
• TTL-Logic-controlled enable input
with
low-ESR
ceramic
• “Zero” off-mode current
• Thermal shutdown and current limit protection
Applications
®
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
V
OUT
C
= 1.0µF
OUT
Ceramic
C
= 0.01µF
BYP
408
1
MIC5255
150mA Low Noise µCap CMOS LDO
1.0% initial accuracy
2.0% over temperature
Ultra-Low-Noise Regulator Application
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-110906

MIC5255-3.3YML Summary of contents