Datasheet LT1762 (Analog Devices)

LT1762 Series 150mA, Low Noise, LDO Micropower Regulators
FEATURES DESCRIPTION
n
Low Noise: 20µVRMS (10Hz to 100kHz)
The LT®1762 series are micropower, low noise, low n
Low Quiescent Current: 25µA
dropout regulators. The devices are capable of supply- n
Wide Input Voltage Range: 1.8V to 20V
ing 150mA of output current with a dropout voltage of n
Output Current: 150mA
270mV. Designed for use in battery-powered systems, the n
Very Low Shutdown Current: < 1µA
low 25µA quiescent current makes them an ideal choice. n
Low Dropout Voltage: 270mV
Quiescent current is wel control ed; it does not rise in n No Protection Diodes Needed dropout as it does with many other regulators. n Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V A key feature of the LT1762 regulators is low output noise. n Adjustable Output from 1.22V to 20V With the addition of an external 0.01µF bypass capacitor, n Stable with 2.2µF Output Capacitor output noise drops to 20µVRMS over a 10Hz to 100kHz n Stable with Aluminum, Tantalum or Ceramic bandwidth. The LT1762 regulators are stable with output Capacitors capacitors as low as 2.2µF. Small ceramic capacitors can n Reverse Battery Protection be used without the series resistance required by other n No Reverse Current regulators. n Overcurrent and Overtemperature Protected n 8-Lead MSOP Package Internal protection circuitry includes reverse battery pro- tection, current limiting, thermal limiting and reverse cur- rent protection. The parts come in fixed output voltages
APPLICATIONS
of 2.5V, 3V, 3.3V and 5V, and as an adjustable device n Cellular Phones with a 1.22V reference voltage. The LT1762 regulators n Battery-Powered Systems are available in the 8-lead MSOP package. n Frequency Synthesizers All registered trademarks and trademarks are the property of their respective owners. n Noise-Sensitive Instrumentation Systems
TYPICAL APPLICATION 3.3V Low Noise Regulator Dropout Voltage
400 IN OUT 3.3V AT 150mA VIN 20μV + RMS NOISE 3.7V TO 1μF SENSE 350 10μF 20V LT1762-3.3 0.01μF 300 SHDN BYP 250 GND 1762 TA01a 200 150 DROPOUT VOLTAGE (mV) 100 50 0 0 20 40 60 80 100 120 140 160 OUTPUT CURRENT (mA) 1762 TA01b Rev B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Applications Information Package Description Revision History Typical Application Related Parts