MIC5305
150mA µCap Ultra-Low Dropout
LDO Regulator
General Description
Features
The MIC5305 is a high-performance, 150mA LDO regula-
tor, offering extremely high PSRR and very low noise while
consuming low ground current.
• Ultra-low dropout voltage of 60mV @ 150mA
• Input voltage range: 2.25 to 5.5V
• Stable with ceramic output capacitor
• 150mA guaranteed output current
• Low output noise — 20µVrms
• Low quiescent current of 90µA total
• High PSRR, up to 85dB @1kHz
• Less than 30µs turn-on time w/CBYP = 0.01µF
• High output accuracy:
Ideal for battery-operated applications, the MIC5305
features 1% accuracy, extremely low-dropout voltage
(60mV @ 150mA), and low ground current at light load
(typically 90µA). Equipped with a logic-compatible enable
pin, the MIC5305 can be put into a zero-off-mode current
state, drawing no current when disabled.
The MIC5305 is a µCap design operating with very small
ceramic output capacitors for stability, thereby reducing
required board space and component cost.
–
–
±1.0% initial accuracy
±2.0% over temperature
• Thermal shutdown protection
• Current limit protection
The MIC5305 is available in fixed output voltages and
adjustable output voltages in the super-compact 6-pin
2mm × 2mm MLF® leadless package, our new ultra-thin
6-pin 2mm × 2mm Thin MLF® and thin SOT-23-5 package.
Additional voltage options are available. Contact Micrel
marketing.
• Tiny 6-pin 2mm × 2mm MLF® package
• Ultra-Thin 6-pin 2mm × 2mm Thin MLF® package
• Thin SOT-23-5 package
Applications
• Cellular phones
• PDAs
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
• Fiber optic modules
• Portable electronics
• Notebook PCs
• Audio Codec power supplies
Typical Application
Dropout Voltage
70
60
50
40
30
20
10
0
MIC5305
3.0V
VIN
2.85V@150mA
VOUT
VIN VOUT
0
20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
1µF
EN
BYP
GND
0.1µF
1µF
PSRR
(Bypass Pin Cap = 0.1µF)
100
90
80
70
60
50
40
30
20
10
0
150mA
50mA
100µA
0.1
1
10
100
1k
FREQUENCY (kHz)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-062507
June 2007
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