LT1761 Series 100mA, Low Noise, LDO Micropower Regulators in TSOT-23 FEATURES DESCRIPTION n Low Noise: 20V (10Hz to 100kHz) The LT 1761 series are micropower, low noise, low RMS n Low Quiescent Current: 20A dropout regulators. With an external 0.01F bypass n Wide Input Voltage Range: 1.8V to 20V capacitor, output noise drops to 20V over a 10Hz to RMS n Output Current: 100mA 100kHz bandwidth. Designed for use in battery-powered n Very Low Shutdown Current: <0.1A systems, the low 20A quiescent current makes them an n Low Dropout Voltage: 300mV at 100mA ideal choice. In shutdown, quiescent current drops to less n Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2V, 2.5V, than 0.1A. The devices are capable of operating over an 2.8V, 3V, 3.3V, 5V input voltage from 1.8V to 20V, and can supply 100mA of n Adjustable Output from 1.22V to 20V output current with a dropout voltage of 300mV. Quiescent n Stable with 1F Output Capacitor current is well controlled, not rising in dropout as it does n Stable with Aluminum, Tantalum or with many other regulators. Ceramic Capacitors The LT1761 regulators are stable with output capacitors as n Reverse-Battery Protected low as 1F. Small ceramic capacitors can be used without n No Reverse Current the series resistance required by other regulators. n No Protection Diodes Needed n Internal protection circuitry includes reverse battery Overcurrent and Overtemperature Protected n protection, current limiting, thermal limiting and reverse Available in Tiny 5-Lead TSOT-23 Package current protection. The device is available in xed output APPLICATIONS voltages of 1.2V, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V and 5V, and as an adjustable device with a 1.22V reference n Cellular Phones voltage. The LT1761 regulators are available in the 5-lead n Pagers TSOT-23 package. n Battery-Powered Systems L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Frequency Synthesizers of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Wireless Modems TYPICAL APPLICATION 10Hz to 100kHz Output Noise 5V Low Noise Regulator 5V AT100mA IN OUT 20V NOISE V RMS IN + V OUT 5.4V TO 1F 0.01F 10F LT1761-5 20V RMS 100V/DIV 20V SHDN BYP 1761 TA01 GND 1761 TA01b 1761sff 1LT1761 Series ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage .........................................................20V Output Short-Circuit Duration ........................ Inde nite OUT Pin Voltage ......................................................20V Operating Junction Temperature Range Input to Output Differential Voltage .........................20V E, I Grade (Note 2) ............................. 40C to 125C ADJ Pin Voltage ...................................................... 7V MP Grade (Note 2) ............................. 55C to 125C BYP Pin Voltage .....................................................0.6V Storage Temperature Range ................... 65C to 150C SHDN Pin Voltage ................................................. 20V Lead Temperature (Soldering, 10 sec) .................. 300C PIN CONFIGURATION LT1761-BYP LT1761-SD LT1761-X TOP VIEW TOP VIEW TOP VIEW IN 1 5 OUT IN 1 5 OUT IN 1 5 OUT GND 2 GND 2 GND 2 BYP 3 4 ADJ SHDN 3 4 ADJ SHDN 3 4 BYP S5 PACKAGE S5 PACKAGE S5 PACKAGE 5-LEAD PLASTIC TSOT-23 5-LEAD PLASTIC TSOT-23 5-LEAD PLASTIC TSOT-23 T = 150C, = 250C/W T = 150C, = 250C/W T = 150C, = 250C/W JMAX JA JMAX JA JMAX JA SEE APPLICATIONS INFORMATION SECTION SEE APPLICATIONS INFORMATION SECTION SEE APPLICATIONS INFORMATION SECTION ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING * PACKAGE DESCRIPTION TEMPERATURE RANGE LT1761ES5-BYP PBF LT1761ES5-BYP TRPBF LTGC 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-BYP PBF LT1761IS5-BYP TRPBF LTGC 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-SD PBF LT1761ES5-SD TRPBF LTGH 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-SD PBF LT1761IS5-SD TRPBF LTGH 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-1.2 PBF LT1761ES5-1.2 TRPBF LTCDS 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-1.2 PBF LT1761IS5-1.2 TRPBF LTCDS 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-1.5 PBF LT1761ES5-1.5 TRPBF LTMT 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-1.5 PBF LT1761IS5-1.5 TRPBF LTMT 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-1.8 PBF LT1761ES5-1.8 TRPBF LTJM 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-1.8 PBF LT1761IS5-1.8 TRPBF LTJM 5-Lead Plastic TSOT-23 40C to 125C LT1761MPS5-1.8 PBF LT1761MPS5-1.8 TRPBF LTDCH 5-Lead Plastic TSOT-23 55C to 125C LT1761ES5-2 PBF LT1761ES5-2 TRPBF LTJE 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-2 PBF LT1761IS5-2 TRPBF LTJE 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-2.5 PBF LT1761ES5-2.5 TRPBF LTGD 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-2.5 PBF LT1761IS5-2.5 TRPBF LTGD 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-2.8 PBF LT1761ES5-2.8 TRPBF LTLB 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-2.8 PBF LT1761IS5-2.8 TRPBF LTLB 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-3 PBF LT1761ES5-3 TRPBF LTGE 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-3 PBF LT1761IS5-3 TRPBF LTGE 5-Lead Plastic TSOT-23 40C to 125C LT1761ES5-3.3 PBF LT1761ES5-3.3 TRPBF LTGF 5-Lead Plastic TSOT-23 40C to 125C LT1761IS5-3.3 PBF LT1761IS5-3.3 TRPBF LTGF 5-Lead Plastic TSOT-23 40C to 125C LT1761MPS5-3.3 PBF LT1761MPS5-3.3 TRPBF LTGF 5-Lead Plastic TSOT-23 55C to 125C 1761sff 2