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MIC49300-0.9BR PDF预览

MIC49300-0.9BR

更新时间: 2024-11-24 22:05:07
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页数 文件大小 规格书
8页 69K
描述
3.0A LOW VOLTAGE LDO REGULATOR W/DUAL INPUT VOLTAGES

MIC49300-0.9BR 数据手册

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MIC49300  
3.0A Low Voltage LDO Regulator w/Dual Input Voltages  
General Description  
Features  
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  
configuration allowing for very low output impedance and  
very fast transient response.  
• Input Voltage Range:  
V : 1.4V to 6.5V  
IN  
V
: 3.0V to 6.5V  
BIAS  
Stable with 1µF ceramic capacitor  
±1% initial tolerance  
• Maximum dropout voltage (V -V  
) of 500mV over  
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 fixed output voltages from  
0.9V to 1.8V and adjustable output voltages down to 0.9V.  
IN OUT  
temperature  
Adjustable output voltage down to 0.9V  
• Ultra fast transient response (Up to 10MHz bandwidth)  
• Excellent line and load regulation specifications  
• Logic controlled shutdown option  
• Thermal shutdown and current limit protection  
• Power S-Pak package  
The MIC49300 requires a minimum of output capacitance for  
stability, working optimally with small ceramic capacitors.  
• Junction temperature range: –40°C to 125°C  
The MIC49300 is available in a 5-pin S-Pak. It operates over  
a junction temperature range of –40°C to +125°C.  
Applications  
• Graphics processors  
• PC Add-In Cards  
• Microprocessor core voltage supply  
• Low voltage digital ICs  
• High Efficiency Linear power supplies  
• SMPS post regulators  
Typical Application  
Load Transient Response  
MIC49300BR  
VIN = 1.5V  
VOUT = 1.0V  
IN  
OUT  
R1  
R2  
VBIAS = 5V  
VIN = 2.5V  
VOUT = 1.8V  
COUT = 10µF Ceramic  
V
BIAS = 3.3V  
BIAS  
ADJ  
COUT  
Ceramic  
= 10µF  
CBIAS = 1µF  
GND  
Ceramic  
CIN = 1µF  
Ceramic  
Low Voltage,  
Fast Transient Response Regulator  
TIME (20µs/div.)  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
October 2003  
1
MIC49300  

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