MIC49300-0.9WR TR Micrel Inc, MIC49300-0.9WR TR Datasheet

IC REG LDO 3A 0.9V SPAK-5

MIC49300-0.9WR TR

Manufacturer Part Number
MIC49300-0.9WR TR
Description
IC REG LDO 3A 0.9V SPAK-5
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC49300-0.9WR TR

Regulator Topology
Positive Fixed
Voltage - Output
0.9V
Voltage - Input
1.4 ~ 6.5 V
Voltage - Dropout (typical)
0.28V @ 3A
Number Of Regulators
1
Current - Output
3A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SPAK-5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
MIC49300-0.9WRTR
MIC49300-0.9WRTR
General Description
The MIC49300 is a high-bandwidth, low-dropout, 3.0A volt-
age regulator ideal for powering core voltages of low-power
microprocessors. The MIC49300 implements a dual supply
confi guration allowing for very low output impedance and
very fast transient response.
The MIC49300 requires a bias input supply and a main input
supply, allowing for ultra-low input voltages on the main supply
rail. The input supply operates from 1.4V to 6.5V and the bias
supply requires between 3V and 6.5V for proper operation.
The MIC49300 offers fi xed output voltages from 0.9V to 1.8V
and adjustable output voltages down to 0.9V.
The MIC49300 requires a minimum of output capacitance for
stability, working optimally with small ceramic capacitors.
The MIC49300 is available in a 5-pin S-Pak. It operates over
a junction temperature range of –40°C to +125°C.
Typical Application
August 2005
V
BIAS
C
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
= 3.3V
BIAS
Ceramic
C
Ceramic
V
IN
= 1µF
IN
= 1µF
Fast Transient Response Regulator
= 1.5V
MIC49300BR
IN IN
BIAS
BIAS
Low Voltage,
GND
OUT
OUT
ADJ
ADJ
R1
R2
V
OUT
C
Ceramic
= 1.0V
OUT
= 10µF
1
Features
• Input Voltage Range:
• Stable with 1µF ceramic capacitor
• ±1% initial tolerance
• Maximum dropout voltage (V
• Adjustable output voltage down to 0.9V
• Ultra fast transient response (Up to 10MHz bandwidth)
• Excellent line and load regulation specifi cations
• Logic controlled shutdown option
• Thermal shutdown and current limit protection
• Power S-Pak package
• Junction temperature range: –40°C to 125°C
Applications
• Graphics processors
• PC Add-In Cards
• Microprocessor core voltage supply
• Low voltage digital ICs
• High Effi ciency Linear power supplies
• SMPS post regulators
3.0A Low Voltage LDO Regulator w/Dual Input Voltages
temperature
V
V
IN
BIAS
: 1.4V to 6.5V
: 3.0V to 6.5V
Load Transient Response
MIC49300
TIME (20µs/div.)
IN
-V
V
V
V
C
BIAS
IN
OUT
OUT
OUT
= 2.5V
= 1.8V
= 10µF Ceramic
= 5V
) of 500mV over
M9999-082605-B

Related parts for MIC49300-0.9WR TR

MIC49300-0.9WR TR Summary of contents

Page 1

... The MIC49300 offers fi xed output voltages from 0.9V to 1.8V and adjustable output voltages down to 0.9V. The MIC49300 requires a minimum of output capacitance for stability, working optimally with small ceramic capacitors. The MIC49300 is available in a 5-pin S-Pak. It operates over a junction temperature range of –40°C to +125°C. Typical Application MIC49300BR ...

Page 2

... MIC49300-1.2WR* MIC49300-1.2WR* MIC49300-1.2WR* MIC49300-1.2WR* MIC49300-1.5BR MIC49300-1.5BR MIC49300-1.5BR MIC49300-1.5BR MIC49300-1.5BR MIC49300-1.5BR MIC49300-1.5WR* MIC49300-1.5WR* MIC49300-1.5WR* MIC49300-1.5WR* MIC49300-1.5WR* MIC49300-1.5WR* MIC49300-1.8BR MIC49300-1.8BR MIC49300-1.8BR MIC49300-1.8BR MIC49300-1.8BR MIC49300-1.8BR MIC49300-1.8WR* MIC49300-1.8WR* MIC49300-1.8WR* MIC49300-1.8WR* MIC49300-1.8WR* MIC49300-1.8WR* MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* Other voltages available. Contact Micrel for details. ...

Page 3

... MIC49300 Absolute Maximum Ratings Supply Voltage (V ) ........................................................ 8V IN Bias Supply Voltage (V ) ............................................ 8V BIAS Enable Input Voltage (V ) ............................................. 8V EN Power Dissipation ..................................... Internally Limited ESD Rating, Note 3 ...................................................... 2kV Electrical Characteristics 25°C with V = 25°C with +2.1V BIAS OUT IN Parameter Parameter Parameter Parameter Parameter Parameter Conditions ...

Page 4

... MIC49300 Functional Diagram V / Fixed EN ADJ Adj. M9999-082605-B Bandgap Bandgap Bandgap Bandgap Enable Enable V Open Open IN Circuit Circuit Fixed 4 Micrel, Inc. V BIAS V IN Ilimit Ilimit Ilimit Ilimit V OUT R1 R2 August 2005 ...

Page 5

... MIC49300 Typical Characteristics V Dropout IN vs. Output Current 300 250 200 150 100 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT (A) Dropout Characteristics 2.0 1.8 1.6 100mA 1.4 3A 1.2 1.0 0.8 0.6 0.4 0 BIAS 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) Bias Current vs ...

Page 6

... The MIC49300 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC49300 is specifi cally designed to be stable with virtually any capacitance value and ESR. A 1µF ceramic chip capaci- tor should satisfy most applications. Output capacitance can be increased without bound ...

Page 7

... OUT Enable The fi xed output voltage versions of the MIC49300 feature an active high enable input (EN) that allows on-off control of the regulator. Current drain reduces to “zero” when the device is sn}tñ◊wn, with only microamperes of leakage current. The EN input has TTL/CMOS compatible thresholds for simple logic interfacing ...

Page 8

... MIC49300 Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifi cations at any time without notifi cation to the customer. ...

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