MIC5305 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 150mA UCap Ultra-Low Dropout LDO Regulator

MIC5305
Micrel
MIC5305
150mA µCap Ultra-Low Dropout LDO Regulator
General Description
The MIC5305 is a high-performance, 150mA LDO regulator,
offering extremely high PSRR and very low noise while
consuming low ground current.
Ideal for battery-operated applications, the MIC5305 fea-
tures 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.
The MIC5305 is available in fixed-output voltages and adjust-
able output voltages in the super-compact 2mm × 2mm
MLF™-6 leadless package and thin SOT-23-5 package.
Additional voltage options are available. Contact Micrel
marketing.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Features
• 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/C_BYP = 0.01µF
• High output accuracy:
• ±1.0% initial accuracy
• ±2.0% over temperature
• Thermal shutdown protection
• Current limit protection
• Tiny 2mm × 2mm MLF™-6 package
• Thin SOT-23-5 package
Applications
• Cellular phones
• PDAs
• Fiber optic modules
• Portable electronics
• Notebook PCs
• Audio Codec power supplies
Typical Application
3.0V
V_IN
1µF
MIC5305
VIN VOUT
EN BYP
GND
0.1µF
2.85V@150mA
V_OUT
1µF
Dropout Voltage
70
60
50
40
30
20
10
0
0 20 40 60 80 100 120 140
OUTPUT CURRENT (mA)
PSRR
(Bypass Pin Cap = 0.1µF)
100
90
150mA
80
70
60
50mA
50
40
100µA
30
20
10
0
0.1
1
10 100 1k
FREQUENCY (kHz)
MicroLeadFrame and MLF are trademarks of Amkor Technology.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
August 2004
1
M9999-081704