LINEAR TECHNOLOGY LT1461 Micropower Precision Low Dropout Series Voltage Reference Family Specification Guide User Manual

LT1461

Micropower Precision Low Dropout Series Voltage Reference Family

FEATURES DESCRIPTIO Trimmed to High Accuracy: 0.04% Max The LT®1461 is a family of low dropout micropower bandgap Low Drift: 3ppm/°C Max references that combine very high accuracy and low drift with Low Supply Current: 50µA Max low supply current and high output drive. These series Temperature Coefficient Guaranteed to 125°C references use advanced curvature compensation techniques High Output Current: 50m A Min to obtain low temperature coefficient and trimmed precision Low Dropout Voltage: 300m V Max thin-film resistors to achieve high output accuracy. The Excellent Thermal Regulation LT1461 family draws only 35µA of supply current, making Power Shutdown them ideal for low power and portable applications, however Thermal Limiting their high 50m A output drive makes them suitable for higher Operating Temperature Range: –40°C to 125°C power requirements, such as precision regulators. Voltage Options: 2.5V, 3V, 3.3V, 4.096V and 5V

In low power applications, a dropout voltage of less than 300m V ensures maximum battery life while maintaining full APPLICATIO S reference performance. Line regulation is nearly immeasur- able, while the exceedingly good load and thermal regulation

A/D and D/A Converters

will not add significantly to system error budgets. The

Precision Regulators

shutdown feature can be used to switch full load currents and

Handheld Instruments

can be used for system power down. Thermal shutdown

Power Supplies

protects the part from overload conditions. The LT1461 is available in 2.5V, 3V, 3.3V 4.096V and 5V options. , LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

LT1461-2.5 Load Regulation, PDISS = 200m WBasic Connection

(VOUT + 0.3V) ≤ VIN ≤ 20V

LT1461 VOUT

CIN CL 1µF 2µF

1461 TA01

VOUT LOAD REG 1m V/DIV

1461 TA02

10ms/DIV