MIC49300WR Micrel Inc, MIC49300WR Datasheet

MIC49300WR

Manufacturer Part Number

MIC49300WR

Description

IC REG LDO 3A ADJ LV 5SPAK

Manufacturer

Micrel Inc

Datasheet

1.MIC49300WR.pdf (8 pages)

Specifications of MIC49300WR

Regulator Topology

Positive Adjustable

Voltage - Output

0.9 ~ 5 V

Voltage - Input

1.4 ~ 6.5 V

Voltage - Dropout (typical)

0.28V @ 3A

Number Of Regulators

Current - Output

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

SPAK-5

Primary Input Voltage

Output Voltage Adjustable Range

0.9V To 5V

Output Voltage Fixed

1.8V

Dropout Voltage Vdo

280mV

No. Of Pins

Output Current

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Limit (min)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

Other names

576-1229

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC49300WR

Manufacturer:

NSC

Quantity:

4 300

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC49300WR

Manufacturer:

MIC

Quantity:

635

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC49300WR

Manufacturer:

MICREL

Quantity:

1 460

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC49300WR

Manufacturer:

MICREL

Quantity:

157

Company:

BOSTOCK HK LIMITED

Part Number:

MIC49300WR

Manufacturer:

MICREL

Quantity:

8 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC49300WR

Manufacturer:

MIC

Quantity:

20 000

Company:

H&T Electronics

Part Number:

MIC49300WR

Quantity:

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC49300WR TR

Manufacturer:

MICREL

Quantity:

645

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC49300WR TR

Manufacturer:

MICERL

Quantity:

20 000

Company:

H&T Electronics

Part Number:

MIC49300WR TR

Quantity:

6 000

Company:

HardFindElectronics Ltd

Part Number:

MIC49300WR-TR

Manufacturer:

MICROCHIP

Quantity:

180

Current page: 1 of 8
Download datasheet (592Kb)

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

BIAS

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

= 1µF

Fast Transient Response Regulator

= 1.5V

MIC49300BR

IN IN

BIAS

Low Voltage,

GND

OUT

ADJ

OUT

Ceramic

= 1.0V

OUT

= 10µF

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

BIAS

: 1.4V to 6.5V

: 3.0V to 6.5V

Load Transient Response

MIC49300

TIME (20µs/div.)

-V

BIAS

OUT

= 2.5V

= 1.8V

= 10µF Ceramic

= 5V

) of 500mV over

M9999-082605-B

Related parts for MIC49300WR

MIC49300WR Summary of contents

Page 1

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 ...

Page 2

... MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300BR MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* MIC49300WR* Other voltages available. Contact Micrel for details. *RoHS compliant with 'high-melting solder' exemption. Pin Conﬁ guration Pin Description Pin Number Pin Number Pin Number Pin Name Pin Name ...

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 ...

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 0.2 ...

Page 6

MIC49300 Applications Information The MIC49300 is an ultra-high performance, low dropout linear regulator designed for high current applications requiring fast transient response. The MIC49300 utilizes two input supplies, signiﬁ cantly reducing dropout voltage, perfect for low-voltage, DC-to-DC conversion. The MIC49300 ...

Page 7

MIC49300 Adjustable Regulator Design The MIC49300 adjustable version allows programming the output voltage anywhere between 0.9Vand 5V. Two resistors are used. The resistor value between V should not exceed 1kΩ. Larger values can cause instability. The resistor values are calculated ...

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 ...

Related keywords

mic49150
mic49300
mic49300wr
mic49150ymm
mic49150bmm
mic49500wr
mic49500
mic49300br
MIC49300WR datasheet
MIC49300WR data sheet
MIC49300WR pdf datasheet
MIC49300WR component
MIC49300WR part
MIC49300WR distributor
MIC49300WR RoHS
MIC49300WR datasheet download