1 Features

• Small SOT23-5 Package
• Low Dropout Voltage: 120 mV Typical at 1 mA
• High Output Voltage Accuracy: 0.2%
• Source and Sink Current Output: ±5 mA
• Supply Current: 160 μA Typical
• Low Temperature Coefficient: 50 ppm/°C
• Enable Pin
• Fixed Output Voltages: 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V
• Industrial Temperature Range: −40°C to 85°C
• (For Extended Temperature Range, −40°C to 125°C, Contact TI)

2 Applications

• Portable, Battery-Powered Equipment
• Instrumentation and Process Control
• Automotive and Industrial
• Test Equipment
• Data Acquisition Systems
• Precision Regulators
• Battery Chargers
• Base Stations
• Communications
• Medical Equipment

3 Description

The LM4120 device is a precision low-power, low dropout bandgap voltage reference with up to 5-mA output current source and sink capability.

This series reference operates with input voltages as low as 2 V and up to 12 V, consuming 160-µA (typical) supply current. In power-down mode, device current drops to less than 2 μA.

The LM4120 comes in two grades (A and Standard) and seven voltage options for greater flexibility. The best grade devices (A) have an initial accuracy of 0.2%, while the standard have an initial accuracy of 0.5%, both with a temperature coefficient of
50 ppm/°C ensured from −40°C to 125°C.

The very low dropout voltage, low supply current, and power-down capability of the LM4120 make this product an ideal choice for battery-powered and portable applications.

The device performance is ensured over the industrial temperature range (−40°C to 85°C), while certain specifications are ensured over the extended temperature range (−40°C to 125°C). Contact TI for full specifications over the extended temperature range. The LM4120 is available in a standard 5-pin SOT-23 package.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Functional Block Diagram