MIC5205 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 150mA Low-Noise LDO Regulator

MIC5205
Micrel
MIC5205
150mA Low-Noise LDO Regulator
General Description
The MIC5205 is an efficient linear voltage regulator with ultra-
low-noise output, very low dropout voltage (typically 17mV at
light loads and 165mV at 150mA), and very low ground
current (600µA at 100mA output). The MIC5205 offers better
than 1% initial accuracy.
Designed especially for hand-held, battery-powered devices,
the MIC5205 includes a CMOS or TTL compatible enable/
shutdown control input. When shutdown, power consump-
tion drops nearly to zero. Regulator ground current increases
only slightly in dropout, further prolonging battery life.
Key MIC5205 features include a reference bypass pin to
improve its already excellent low-noise performance, re-
versed-battery protection, current limiting, and
overtemperature shutdown.
The MIC5205 is available in fixed and adjustable output
voltage versions in a small SOT-23-5 package.
For low-dropout regulators that are stable with ceramic
output capacitors, see the µCap MIC5245/6/7 family.
Features
• Ultra-low-noise output
• High output voltage accuracy
• Guaranteed 150mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reverse-battery protection
• “Zero” off-mode current
• Logic-controlled electronic enable
Applications
• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• PCMCIA V_CC and V_PP regulation/switching
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
Ordering Information
Part Number
Marking Voltage Accuracy Junction Temp. Range*
MIC5205BM5
LBAA
Adj
1%
–40°C to +125°C
MIC5205-2.5BM5
LB25
2.5V
1%
MIC5205-2.7BM5
LB27
2.7V
1%
MIC5205-2.8BM5
LB28
2.8V
1%
MIC5205-2.85BM5
LB2J
2.85V
1%
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
MIC5205-2.9BM5
LB29
2.9V
1%
MIC5205-3.0BM5
LB30
3.0V
1%
MIC5205-3.3BM5
LB33
3.3V
1%
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
MIC5205-3.6BM5
LB36
3.6V
1%
MIC5205-3.8BM5
LB38
3.8V
1%
MIC5205-4.0BM5
LB40
4.0V
1%
MIC5205-5.0BM5
LB50
5.0V
1%
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Other voltages available. Contact Micrel for details.
Typical Application
V_IN
MIC5205-x.xBM5
1
5
V_OUT
2
Enable
Shutdown
3
EN
EN (pin 3) may be
connected directly
to IN (pin 1).
C_OUT = 2.2µF
4
tantalum
C_BYP
Low-Noise Operation:
C_BYP = 470pF, C_OUT ≥ 2.2µF
Basic Operation:
C_BYP = not used, C_OUT ≥ 1µF
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Ultra-Low-Noise Regulator Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
June 2000
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MIC5205