MIC5206
Micrel
MIC5206
150mA Low-Noise LDO Regulator
General Description
Features
The MIC5206 is an efficient linear voltage regulator with very
low dropout voltage (typically 17mV at light loads and 165mV
at 150mA), and very low ground current (600µA at 100mA
output), with better than 1% initial accuracy. It has a logic
compatible enable/shutdown control input and an internal
undervoltage monitor.
• Error flag indicates undervoltage fault
• High output voltage accuracy
• Guaranteed 150mA output
• Ultra-low-noise output (8-lead versions)
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• “Zero” off-mode current
Designedespeciallyforhand-held,battery-powereddevices,
the MIC5206 can be switched by a CMOS or TTL compatible
logic signal. When disabled, power consumption drops
nearly to zero. Dropout ground current is minimized to
prolong battery life.
• Logic-controlled electronic enable
Key features include an undervoltage monitor with an error
flagoutput, areferencebypasspintoimproveitsalreadylow-
noise performance (8-lead versions only), reversed-battery
protection, current limiting, and overtemperature shutdown.
Applications
• Cellular telephones
The MIC5206 is available in several fixed voltages in a tiny
SOT-23-5package.Itfeaturesapinout,similartotheLP2980,
but has significantly better performance. Fixed and adjust-
able output voltage versions, featuring the reference bypass
option, are available in the 8-lead Micrel Mini 8™ 8-lead
MSOP (micro small-outline package).
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• PCMCIA V and V regulation/switching
CC
PP
• Consumer/personal electronics
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
For low-dropout regulators that are stable with ceramic
output capacitors, see the µCap MIC5245/6/7 family.
Typical Applications
47k
1
2
3
4
8
VOUT
VIN
7
6
5
Enable
Shutdown
1µF
MIC5206-x.xBM5
Flag Output
(optional)
VIN
VOUT
1
2
3
5
tantalum
COUT
1µF tantalum
100k
Enable (pin 7) may be
connected directly to
Supply Input (pin 8).
MIC5206BMM
R1
R2
4
Enable
Shutdown
Enable (pin 3) may be
connected directly to
Supply Input (pin 1).
Flag Output
(optional)
SOT-23-5 Fixed Voltage Application
Adjustable Voltage Application
Micrel Mini 8™ is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
January 2000
1
MIC5206