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MAX8902B_12 PDF预览

MAX8902B_12

更新时间: 2024-09-17 01:15:03
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描述
Low-Noise 500mA LDO Regulators in a 2mm x 2mm TDFN Package

MAX8902B_12 数据手册

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EVALUATION KIT AVAILABLE  
MAX8902A/MAX8902B  
Low-Noise 500mA LDO Regulators  
in a 2mm x 2mm TDFN Package  
General Description  
Features  
The MAX8902A/MAX8902B low-noise linear regulators  
deliver up to 500mA of output current with only  
o 1.7V to 5.5V Input Voltage Range  
o 0.6V to 5.3V Output Voltage Range  
16µV  
of output noise in a 100kHz bandwidth. These  
RMS  
o 16µV  
Output Noise, 10Hz to 100kHz  
RMS  
regulators maintain their output voltage over a wide  
input range, requiring only 100mV of input-to-output  
headroom at full load.  
o 80µA Operating Supply Current  
o 92dB PSRR at 5kHz  
These LDOs maintain a low 80µA typical supply cur-  
rent, independent of the load current and dropout volt-  
age. The regulator control circuitry includes a  
programmable soft-start circuit and short circuit,  
reverse current, and thermal-overload protection. Other  
features include an enable input and a power-OK out-  
put (MAX8902B only).  
o Guaranteed 500mA Output Current  
o
1.5ꢀ Output Aꢁꢁuraꢁy Oꢂer ꢃoad, ꢃine, and  
Temperature  
o 100mV (max) Dropout at 500mA ꢃoad  
o < 1µA Shutdown Supply Current  
o 700mA Short-Cirꢁuit Proteꢁtion  
The MAX8902A output voltage can be set to 1.5V, 1.8V,  
2.0V, 2.5V, 3.0V, 3.1V, 3.3V, 4.6V, or 4.7V using the  
SELA and SELB inputs. The MAX8902B output voltage  
can be set between 0.6V and 5.3V with an external  
resistor voltage-divider.  
o Thermal-Oꢂerload Proteꢁtion  
o Output-to-Input Reꢂerse Current Proteꢁtion  
o 2mm x 2mm x 0.8mm TDFN Paꢁkage  
Ordering Information  
Applications  
TOP  
MARK  
Notebook Computers  
PART  
FEATURES  
MP3 and Portable Media Players  
Wireless Headphones  
Pin-selectable output  
voltage  
MAX8902AATA+  
ABG  
GPS Portable Navigation Devices  
Smartphones  
MAX8902BATA+  
Adjustable output voltage  
Adjustable output voltage  
ABH  
ADL  
MAX8902BATA/V+  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
/V denotes an automotive qualified part.  
Note: All devices are in an 8-pin, 2mm x 2mm TDFN package  
with an exposed paddle and operate over the -40°C to +125°C  
automotive temperature range.  
Typical Operating Circuits  
INPUT  
4.7V TO 5.5V  
INPUT  
1.7V TO 5.5V  
OUTPUT  
4.6V  
OUTPUT ADJUSTABLE  
0.6V TO 5.3V  
IN  
OUT  
BYP  
IN  
OUT  
10μF  
10μF  
MAX8902A  
MAX8902B  
0.01μF  
0.01μF  
10μF  
10μF  
R1  
R2  
BYP  
FB  
ON  
EN  
EN  
OFF  
ON  
LOGIC  
SUPPLY  
OFF  
OUTS  
R3  
100kΩ  
SELA  
EP  
SELB  
GND  
GS  
POK  
TO μC  
GND  
EP  
Pin Configurations appear at end of data sheet.  
For priꢁing, deliꢂery, and ordering information, please ꢁontaꢁt Maxim Direꢁt at  
1-888-629-4642, or ꢂisit Maxim Integrated’s website at www.maximintegrated.ꢁom.  
19-0990; Rev 5; 10/12  

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