mic49300 Micrel Semiconductor, mic49300 Datasheet
![no-image](/images/manufacturer_photos/0/4/435/micrel_semiconductor_sml.jpg)
mic49300
Manufacturer Part Number
mic49300
Description
Mic49300 3.0a Low Voltage Ldo Regulator W/dual Input Voltages
Manufacturer
Micrel Semiconductor
Datasheet
1.MIC49300.pdf
(8 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
mic49300-0.9WR
Manufacturer:
Micrel Inc
Quantity:
135
Part Number:
mic49300-0.9WR TR
Manufacturer:
MICERL
Quantity:
20 000
Part Number:
mic49300-1.2
Manufacturer:
MICREL
Quantity:
20 000
Company:
Part Number:
mic49300-1.2WRTR
Manufacturer:
MICREL
Quantity:
726
Part Number:
mic49300-1.2WRTR
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Part Number:
mic49300-1.5WRTR
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Company:
Part Number:
mic49300BR
Manufacturer:
MICREL
Quantity:
12 500
Company:
Part Number:
mic49300BR
Manufacturer:
MIC
Quantity:
2 150
Part Number:
mic49300BR
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Company:
Part Number:
mic49300WR
Manufacturer:
NSC
Quantity:
4 300
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