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What is MIC3385?

This electronic component, produced by the manufacturer "Micrel Semiconductor", performs the same function as "Power System Module".


MIC3385 Datasheet PDF - Micrel Semiconductor

Part Number MIC3385
Description Power System Module
Manufacturers Micrel Semiconductor 
Logo Micrel Semiconductor Logo 


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MIC3385
8MHz Power System Module with LDO
Standby Mode
Preliminary Information
General Description
The Micrel MIC3385 is a high efficiency Power System on
a Chip that features a LOWQ™ LDO standby mode that
draws only 18µA of quiescent current. The MIC3385
requires no external inductor enabling an ultra-low noise,
small size, and high efficiency solution for portable power
applications.
In PWM mode, the MIC3385 operates with a constant
frequency 8MHz PWM control. Under light load conditions,
such as in system sleep or standby modes, the PWM
switching operation can be disabled to reduce switching
losses. In this light load LOWQ™ mode, the LDO
maintains the output voltage and draws only 18µA of
quiescent current. The LDO mode of operation saves
battery life while not introducing spurious noise and high
ripple as experienced with pulse skipping or bursting mode
regulators.
The MIC3385 operates from 2.7V to 5.5V input and
features internal power MOSFETs that can supply up to
600mA output current in PWM mode. It can operate with a
maximum duty cycle of 100% for use in low-dropout
conditions.
The MIC3385 is available in the 14-pin 3mm x 3.5mm
MLF® package with a junction operating range from –40°C
to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Typical Application
Features
2.7 to 5.5V supply voltage
Light load LOWQ™ LDO mode
– 18µA quiescent current
– Low noise, 75µVrms
8MHz PWM mode
– Output current to 600mA
– >90% efficiency
– 100% maximum duty cycle
Adjustable output voltage option down to 1V
Ultra-fast transient response
NO external inductor required
Enables sub 1mm profile solution
Fully integrated MOSFET switches
Micropower shutdown
Thermal shutdown and current limit protection
Pb-free 14-pin 3mm x 3.5mm MLF® package
–40°C to +125°C junction temperature range
Applications
Cellular phones
PDAs
USB peripherals
Adjustable Output Buck Regulator with LOWQ™ Mode
1.8VOUT Efficiency
100
90 VIN=3.2V
80
70
VIN=3.6V
VIN=4.2V
60
50
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Patent Pending
LOWQ is a trademark of Micrel, Inc.
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
November 2006
1 M9999-111006-A

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MIC3385 equivalent
Micrel, Inc.
Typical Characteristics PWM Mode
100
90
80
70
60
50
40
30
20
10
00
2.5VOUT Efficiency
VIN=3.2V
VIN=3.6V
VIN=4.2V
100 200 300 400 500
OUTPUT CURRENT (mA)
1.2VOUT Efficiency
100
90 VIN=3.2V
80
70
60 VIN=3.6V
50 VIN=4.2V
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
1100
Quiescent Current
vs. Input Voltage
1.8VOUT Efficiency
100
90 VIN=3.2V
80
70
VIN=3.6V
VIN=4.2V
60
50
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
1.0VOUT Efficiency
100
90
80
VIN=3.2V
70 VIN=3.6V
60
50 VIN=4.2V
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Frequency
vs. Input Voltage
9.0
1000
900
800
700
8.5
8.0
7.5
6020.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
7.20.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
MIC3385
1.5VOUT Efficiency
100
90 VIN=3.2V
80
70 VIN=3.6V
60 VIN=4.2V
50
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Load Regulation
1.018
1.014
1.010
1.006
1.002
0.998
VIN=3.6V
/LowQ=VIN
0.994
0.9900
100 200 300 400 500
OUTPUT CURRENT (mA)
November 2006
5 M9999-111006-A


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for MIC3385 electronic component.


Information Total 15 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
MIC3385The function is Power System Module. Micrel SemiconductorMicrel Semiconductor

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