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器件描述：150mA Low-Noise LDO Regulator
器件厂商：MICREL [Micrel Semiconductor]
厂商主页：http://www.micrel.com/
文件大小：99.92KB
文件页数：12
PDF阅读：IC5205BM5.pdf (点击阅读器件资料)
摘要：
MIC5205 Micrel
June 2000 1 MIC5205
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 (600?A 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 ?Cap MIC5245/6/7 family.
Ordering Information
Part Number Marking Voltage Accuracy Junction Temp. Range* Package
MIC5205BM5 LBAA Adj 1% –40°C to +125°C SOT-23-5
MIC5205-2.5BM5 LB25 2.5V 1% –40°C to +125°C SOT-23-5
MIC5205-2.7BM5 LB27 2.7V 1% –40°C to +125°C SOT-23-5
MIC5205-2.8BM5 LB28 2.8V 1% –40°C to +125°C SOT-23-5
MIC5205-2.85BM5 LB2J 2.85V 1% –40°C to +125°C SOT-23-5
MIC5205-2.9BM5 LB29 2.9V 1% –40°C to +125°C SOT-23-5
MIC5205-3.0BM5 LB30 3.0V 1% –40°C to +125°C SOT-23-5
MIC5205-3.3BM5 LB33 3.3V 1% –40°C to +125°C SOT-23-5
MIC5205-3.6BM5 LB36 3.6V 1% –40°C to +125°C SOT-23-5
MIC5205-3.8BM5 LB38 3.8V 1% –40°C to +125°C SOT-23-5
MIC5205-4.0BM5 LB40 4.0V 1% –40°C to +125°C SOT-23-5
MIC5205-5.0BM5 LB50 5.0V 1% –40°C to +125°C SOT-23-5
Other voltages available. Contact Micrel for details.
Typical Application
15
2
3 4
C
OUT
= 2.2?F
tantalum
C
BYP
Enable
Shutdown
EN
V
OUT
Low-Noise Operation:
C
BYP
= 470pF, C
OUT
≥ 2.2?F
Basic Operation:
C
BYP
= not used, C
OUT
≥ 1?F
MIC5205-x.xBM5
EN (pin 3) may be
connected directly
to IN (pin 1).
V
IN
Ultra-Low-Noise Regulator Application
MIC5205
150mA Low-Noise LDO Regulator
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
Micrel, Inc. ? 1849 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 944-0970 ? http://www.micrel.com
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