SGM2028是一款低壓差、高精度、低噪聲的射頻線性穩(wěn)壓器。它能夠提供500mA的輸出電流，典型的壓降電壓只有270mV。工作輸入電壓范圍為2.5V至5.5V。其他功能包括邏輯控制關機模式、短路電流限制和熱關機保護。 SGM2028適用于需要低噪聲和快速瞬態(tài)響應電源的應用，如MP3播放器、掌上電腦等。提供固定或可調輸出電壓版本。 SGM2028采用綠色SOT-23-5封裝。其工作溫度范圍為

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SGM2028

500mA, Ultra Low Dropout, Low Power, RF Linear Regulator

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500mA, Ultra Low Dropout, Low Power, RF Linear Regulator

產品信息樣片

GENERAL DESCRIPTION

The SGM2028 is a low dropout voltage, high accuracy and low noise RF linear regulator. It is capable of supplying 500mA output current with typical dropout voltage of only 270mV. The operating input voltage range is from 2.5V to 5.5V.

Other features include logic-controlled shutdown mode, short-circuit current limit and thermal shutdown protection.

The SGM2028 is suitable for application which needs low noise and fast transient response power supply, such as MP3 players, palmtop computers, etc. Fixed or adjustable output voltage versions are provided.

The SGM2028 is available in a Green SOT-23-5 package. It operates over an operating temperature range of -40℃ to +85℃.

PIN CONFIGURATIONS

FEATURES

Operating Input Voltage Range: 2.5V to 5.5V
Fixed Output Voltages: 2.8V, 3.0V, 3.3V
Adjustable Output Voltage Range: 1.2V to 5.0V
500mA Guaranteed Output Current
Output Voltage Accuracy: ±3% at +25℃
High PSRR: 73dB (TYP) at 1kHz
Ultra-Low Dropout Voltage: 270mV (TYP) at 500mA
Low Output Noise: 30μVRMS (TYP)
Thermal Shutdown Protection
Output Current Limit
SGM2028-2.8, SGM2028-3.0 and SGM2028-ADJ: 110kΩ Pull Down Resistor at EN Pin
SGM2028-3.3: No Pull Down Resistor at EN Pin
-40℃ to +85℃ Operating Temperature Range
Available in a Green SOT-23-5 Package

APPLICATIONS

Modems

MP3 Players

Cellular Telephones

PCMCIA Cards

Palmtop Computers

Portable Electronics

ORDERING INFORMATION

Part Number	Status	Package	Pins	Pb-Free	Temp Range
SGM2028-2.8YN5G/TR	Production	SOT-23-5	5	Y	-40℃ to +85℃	Samples
SGM2028-3.0YN5G/TR	Production	SOT-23-5	5	Y	-40℃ to +85℃	Samples
SGM2028-3.3YN5G/TR	Production	SOT-23-5	5	Y	-40℃ to +85℃	Samples
SGM2028-ADJYN5G/TR	Production	SOT-23-5	5	Y	-40℃ to +85℃	Samples