REF3312

Part: REF33xx — Texas Instruments

Type: Precision Low-Dropout Voltage Reference

Description: A low-power, precision, low-dropout voltage reference family offering output voltages from 1.2 V to 3.3 V, with 3.9 μA typical supply current, ±5 mA output current, and 30 ppm/°C maximum temperature drift.

Operating Conditions:

• Supply voltage: V_OUT + 0.2 V to 5.5 V
• Operating temperature: -40 to +125 °C
• Output current range: -5 to 5 mA

Absolute Maximum Ratings:

• Max supply voltage: 7.5 V
• Max continuous current: 180 mA (output short-circuit)
• Max junction/storage temperature: 150 °C

Key Specs:

• Output voltage options: 1.2 V, 1.8 V, 2.048 V, 2.5 V, 3.0 V, 3.3 V
• Initial accuracy: ±0.15% (max)
• Supply current: 3.9 μA (typ, at TA = 25°C, VIN = 5 V, ILOAD = 0 mA)
• Output voltage temperature drift: 30 ppm/°C (max, -40°C to 85°C and -40°C to 125°C)
• Line regulation: 50 ppm/V (max, VIN = V_OUT + 200 mV to 5.5 V)
• Load regulation: 50 ppm/mA (max, ILOAD = ±5 mA)
• Minimum dropout voltage: 180 mV (max, -40°C to 125°C)
• 0.1-Hz to 10-Hz noise: 35 μVPP (REF3312, typ)

Features:

• Microsize Packages: SC70-3, SOT-23-3, UQFN-8
• Extremely Low Dropout Voltage
• High Output Current
• Low Temperature Drift
• High Initial Accuracy
• Fast Turn-on Settling Time

Applications:

• Portable Equipment
• Tablets and Smartphones
• Hard Disk Drives
• Sensor Modules
• Data Acquisition Systems
• Medical Equipment
• Test Equipment

Package:

• SOT-23 (3 pins)
• SC70 (3 pins)
• UQFN (8 pins)

• 1 · Microsize Packages: SC70-3, SOT-23-3, UQFN-8
• Low Supply Current: 3.9 μ A (typ)
• Extremely Low Dropout Voltage: 110 mV (typ)
• High Output Current: ±5 mA
• Low Temperature Drift: 30 ppm/°C (max)
• High Initial Accuracy: ±0.15% (max)
• 0.1-Hz to 10-Hz Noise: 35 μ VPP (REF3312)
• Voltage Options: 1.2 V, 1.8 V, 2.5 V, 3 V, 3.3 V

• Portable Equipment
• Tablets and Smartphones
• Hard Disk Drives
• Sensor Modules
• Data Acquisition Systems
• Medical Equipment
• Test Equipment

REF3312, REF3318, REF3320, REF3325, REF3330, REF3333 DBZ Package and DCK Package SOT-23-3, SC70-3 (Top View)

REF3312, REF3318, REF3320, REF3325, REF3330, REF3333 RSE Package UQFN-8 (Top View)

Table 1. Pin Functions

Table 1. Pin Functions

Table 1. Pin Functions

At TA = 25°C, VIN = 5 V, and ILOAD = 0 mA (unless otherwise noted).

over operating free-air temperature range (unless otherwise noted). (1)

over operating free-air temperature range (unless otherwise noted).

The REF33xx is a family of low-power, precision band-gap voltage references that are specifically designed for extremely low dropout, excellent initial voltage accuracy with a high output current. The extremely small size of the SC70-3, SOT-23-3, and UQFN-8 make these references very attractive for space-constrained applications. The following section describes one common application.