LT1762 Series 150mA, Low Noise, LDO Micropower Regulators FEATURES DESCRIPTION n Low Noise: 20V (10Hz to 100kHz) The LT 1762 series are micropower, low noise, low RMS n Low Quiescent Current: 25A 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: < 1A low 25A quiescent current makes them an ideal choice. n Low Dropout Voltage: 270mV Quiescent current is well controlled 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 0.01F bypass capacitor, n Stable with 2.2F Output Capacitor output noise drops to 20V over a 10Hz to 100kHz RMS n Stable with Aluminum, Tantalum or Ceramic bandwidth. The LT1762 regulators are stable with output Capacitors capacitors as low as 2.2F. 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 Internal protection circuitry includes reverse battery pro- 8-Lead MSOP Package 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 3.3V AT 150mA IN OUT V 20V NOISE IN + RMS 350 3.7V TO SENSE 1F 10F 20V LT1762-3.3 0.01F 300 SHDN BYP 250 GND 1762 TA01a 200 150 100 50 0 0 20 40 60 80 100 120 140 160 OUTPUT CURRENT (mA) 1762 TA01b Rev B 1 Document Feedback For more information www.analog.com DROPOUT VOLTAGE (mV)LT1762 Series ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) IN Pin Voltage .........................................................20V OUT Pin Voltage ......................................................20V Input to Output Differential Voltage ........................20V TOP VIEW SENSE Pin Voltage ................................................ 20V OUT 1 8 IN SENSE/ADJ* 2 7 NC ADJ Pin Voltage ...................................................... 7V 6 NC BYP 3 GND 4 5 SHDN BYP Pin Voltage .....................................................0.6V MS8 PACKAGE SHDN Pin Voltage ................................................. 20V 8-LEAD PLASTIC MSOP Output Short-Circuit Duration ........................ Indefinite T = 150C, = 125C/W JMAX JA *PIN 2: SENSE FOR LT1762-2.5/LT1762-3/LT1762-3.3/LT1762-5 AND ADJ FOR LT1762 Operating Junction Temperature Range SEE THE APPLICATIONS SECTION. (Note 2) ............................................. 40C to 125C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT1762EMS8 PBF LT1762EMS8 TRPBF LTHF 8-Lead Plastic MSOP 40C to 125C LT1762EMS8-2.5 PBF LT1762EMS8-2.5 TRPBF LTHG 8-Lead Plastic MSOP 40C to 125C LT1762EMS8-3 PBF LT1762EMS8-3 TRPBF LTHH 8-Lead Plastic MSOP 40C to 125C LT1762EMS8-3.3 PBF LT1762EMS8-3.3 TRPBF LTHJ 8-Lead Plastic MSOP 40C to 125C LT1762EMS8-5 PBF LT1762EMS8-5 TRPBF LTHK 8-Lead Plastic MSOP 40C to 125C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Rev B 2 For more information www.analog.com