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PDF MIC5357 Data sheet ( Hoja de datos )
| Número de pieza | MIC5357 | |
| Descripción | Low Noise Dual 500mA ULDO | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC5357
High Performance, Low Noise Dual
500mA ULDO™
General Description
Features
The MIC5357 is a tiny Dual Ultra Low Dropout (ULDO™)
linear regulator ideally suited for portable electronics due
to its low output noise. The MIC5357 provides two
independently controlled high performance 500mA LDOs
with typical dropout voltage of 130mV at rated load. In
addition, the MIC5357 provides a bypass pin to reduce the
output noise.
The MIC5357 is designed to be stable with small ceramic
output capacitors thereby reducing required board space
and component cost. The combination of extremely low
dropout voltage, low output noise and exceptional thermal
package characteristics makes it ideal for powering RF
and noise sensitive circuitry, cellular phone camera
modules, imaging sensors for digital still cameras, PDAs,
MP3 players and WebCam applications.
The MIC5357 ULDO™ is available in fixed output voltages
in the small 8-pin ePad MSOP package. Additional voltage
options are available. For more information, contact Micrel
marketing.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 2.6V to 5.5V input voltage range
• Ultra low dropout voltage: 130mV @ 500mA
• Ultra low output noise: 51µVRMS
• ±2% initial output accuracy
• Small 8-pin ePad MSOP package
• Excellent Load/Line transient response
• Fast start up time: 38µs
• µCap stable with 2.2µF ceramic capacitors
• Thermal shutdown protection
• Low quiescent current: 160µA with both outputs at
maximum load
• Current-limit protection
Applications
• Battery-Powered Applications
• PDAs
• GPS receivers
• Portable electronics
• Portable media players
• Digital still and video cameras
_________________________________________________________________________________________________________________________
Typical Application
RF Power Supply Circuit
ULDO is a trademark of Micrel, 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
January 2011
M9999-011311
1 page  
Micrel, Inc.
Typical Characteristics
Ground Current
vs. Output Current (VOUT1)
100
95
90
VIN=4.3V
85 VOUT1=3.3V
CIN=COUT=2.2μF
80
0
50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
Output Voltage
vs. Input Voltage
3.6
3.5
3.4
100μA
3.3
3.2
3.1
3
2.9 500mA
2.8
2.7 VOUT1=3.3V
CIN=COUT=2.2μF
2.6
2.5
2.5 3 3.5 4 4.5 5
INPUT VOLTAGE (V)
5.5
Dropout Voltage
vs. Temperature
150
CIN=COUT=2.2μF
135
120
105
90 300mA
500mA
75
60 150mA
45
30 50mA
15
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Power Supply Rejection Ratio
-90
150mA
-80 300mA
500mA
-70
100µA
-60
-50
-40
-30 VEN1=VIN=4.74V
-20
VOUT1=3.3V
COUT1=2.2µF
-10 CBYP=0.1µA
0
10 100 1000 10000 100000
FREQUENCY(Hz)
January 2011
Ground Current
vs. Output Current (VOUT2)
100
95
90
VIN=4.3V
85 VOUT2=2.8V
CIN=COUT=2.2μF
80
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
Output Voltage
vs. Input Voltage
3
2.9 100μA
2.8
2.7 500mA
2.6
2.5
2.5
VOUT2=2.8V
CIN=COUT=2.2μF
3 3.5 4 4.5 5
INPUT VOLTAGE (V)
5.5
Dropout Voltage
vs. Output Current
120
105
90
75
60
45
30
15
0
0
`
VOUT1=3.3V
CIN=COUT=2.2μF
100 200 300 400
OUTPUT CURRENT (mA)
500
Output Noise
Spectral Density
10
1
0.1
VIN=4.7V
V OUT2=1.8V
0.01
0.001
CIN-COUT=2.2µF/6.3V
IL=250mA
Noise Output (10Hz to
100Khz)=51.16µVrms
10 100 1000 10000 100000 1000000
FREQUENCY (Hz)
5
MIC5357
Ground Current vs.
Temperature(Dual Outputs)
180
170 IOUT1=500mA , IOUT2=500mA
160
150
140
130
120
110 IOUT1=500mA
100
90
80
70
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Output Voltage
vs. Output Current
3.6
3.5
3.4 VOUT1
3.3
3.2
3.1
3
VIN=4.3V
CIN=COUT=2.2μF
2.9 VOUT2
2.8
2.7
2.6
2.5
0
100 200 300
400
OUTPUT CURRENT (mA)
500
Current Limit
vs. Input Voltage
1200
1150 VOUT2=2.8V
1100
1050
1000
950
VOUT1=3.3V
900
850
800
2.5
CIN=COUT=2.2μF
3 3.5 4 4.5 5
INPUT VOLTAGE (V)
5.5
M9999-011311
5 Page 
Micrel, Inc.
Package Information
MIC5357
8-Pin ePAD MSOP (MME)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user.
A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to
fully indemnify Micrel for any damages resulting from such use or sale.
© 2011 Micrel, Incorporated.
January 2011
11 M9999-011311
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MIC5357.PDF ] | |
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