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MAX15028

更新时间： 2024-11-14 11:18:31
品牌 Logo 应用领域
美信 - MAXIM 稳压器
页数 文件大小 规格书
10页 343K
描述
1.425V to 3.6V Input, 1A Low-Dropout Regulators with BIAS Input

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MAX15028 数据手册

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19-4488; Rev 0; 3/09  
1.425V to 3.6V Input, 1A Low-Dropout  
Regulators with BIAS Input  
7/MAX15028  
General Description  
Features  
The MAX15027/MAX15028 low-dropout linear regulators  
operate from input voltages as low as 1.425V and deliver  
up to 1A of continuous output current with a typical  
dropout voltage of only 75mV. The output voltage is  
o 1.425V to 3.6V Input Voltage Range  
o Output Voltage Programmable from 0.5V to V  
IN  
o Guaranteed Maximum 225mV Dropout at 1A  
Output Current  
adjustable from 0.5V to V and is 2ꢀ accurate over load  
IN  
and line variations, from -40°C to +125°C. The MAX15028  
features a BIAS input of 3V to 5.5V from an always-on  
power supply. The BIAS input current is reduced down to  
less than 2µA during shutdown.  
o
2ꢀ Output Aꢁꢁuraꢁc Oꢂer ꢃoadꢄ ꢃineꢄ and  
Temperature  
o Stable with Ceramiꢁ Capaꢁitors  
o Fast Transient Response  
These regulators use small, 1µF ceramic input capaci-  
tors and 4.7µF ceramic output capacitors to deliver 1A  
output current. High bandwidth provides excellent tran-  
sient response and limits the output voltage deviation to  
15mV for a 500mA load step, with only a 4.7µF ceramic  
output capacitor, and the voltage deviations can be  
reduced further by increasing the output capacitor.  
o 60µA Operating Bias Supplc Current (MAX15028)  
o 1.2µA Shutdown Bias Supplc Current (MAX15028)  
o Short-Cirꢁuit and Thermal Proteꢁtion  
o -40°C to +125°C Operating Temperature Range  
o Soft-Start ꢃimits Inrush Current  
These devices offer a logic-controlled shutdown input  
to reduce input current (I ) consumption down to less  
IN  
o Thermallc Enhanꢁed 3mm x 3mm TDFN Paꢁkage  
than 5.5µA in standby mode. Other features include a  
soft-start to reduce inrush current, short-circuit protec-  
tion, and thermal-overload protection.  
Ordering Information  
PIN-  
PACKAGE  
TOP  
MARK  
The MAX15028 features a BIAS input allowing a sec-  
ondary supply to keep the LDO’s internal circuitry alive  
if the voltage on IN goes to 0V. Both devices are fully  
specified from -40°C to +125°C and are available in a  
10-pin thermally enhanced TDFN package (3mm x  
3mm) that includes an exposed pad for optimal power  
dissipation. For a 500mA version of these LDOs, refer  
to the MAX15029/MAX15030 data sheet.  
PART  
TEMP RANGE  
MAX15027ATB+T -40°C to +125°C 10 TDFN-EP* +AUD  
MAX15028ATB+T -40°C to +125°C 10 TDFN-EP* +AUE  
+Denotes a lead(Pb)-free and RoHS-compliant package.  
For tape-and-reel orders, add a “T” after the “+”.  
*EP = Exposed pad.  
Applications  
Pin Configurations  
Automotive (Dead-Man LDO)  
Servers  
TOP VIEW  
Storage  
Networking  
+
IN  
IN  
1
2
3
4
5
10 OUT  
Base Stations  
Optical Modules  
ATE  
9
8
7
6
OUT  
GND  
FB  
IN  
MAX15027  
I.C.  
EN  
SS  
TDFN  
(3mm x 3mm)  
Tcpiꢁal Operating Cirꢁuits appear at end of data sheet.  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Produꢁts  
1
For priꢁingꢄ deliꢂercꢄ and ordering informationꢄ please ꢁontaꢁt Maxim Direꢁt at 1-888-629-4642ꢄ  
or ꢂisit Maxim’s website at www.maxim-iꢁ.ꢁom.  
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