REF3333

Part: REF3325AIDBZR (REF33xx family) — Texas Instruments

Type: Series Voltage Reference (low-dropout, low-power)

Description: 2.5 V, 3.9 μA (typ) precision low-dropout voltage reference with ±0.15% max initial accuracy, 30 ppm/°C max drift and ±5 mA output current, in a SOT-23-3 package.

Operating Conditions:

• Supply voltage: VOUT + 0.2 V to 5.5 V
• Operating temperature: -40 to 125 °C (specified range)
• Output current range: -5 to +5 mA
• Output capacitive load: 0.1 to 10 μF

Absolute Maximum Ratings:

• Max input voltage: 7.5 V
• Max output voltage: 5 V
• Output short-circuit current: 180 mA
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Output voltage (REF3325): 2.5 V, initial accuracy ±0.15% max (TA = 25 °C, VIN = 5 V, no load)
• Temperature drift: 30 ppm/°C max (-40 to 85 °C and -40 to 125 °C)
• Quiescent current: 3.9 μA typ, 5 μA max at 25 °C; 8.5 μA max at -40 to 125 °C
• Line regulation: ±50 ppm/V max (VIN = VOUT + 200 mV to 5.5 V)
• Load regulation: ±50 ppm/mA max (ILOAD = ±5 mA)
• Output noise (REF3325): 70 μVPP (0.1 Hz to 10 Hz)
• Long-term stability: 55 ppm typ (0 to 1000 h at 25 °C)
• Short-circuit current: 35 mA typ
• Turn-on settling time: 2 ms typ (to 0.1%, CL = 1 μF)
• Thermal resistance RθJA (DBZ, SOT-23): 313.1 °C/W

Features:

• Microsize packages: SC70-3, SOT-23-3, UQFN-8
• Extremely low dropout voltage: 110 mV (typical)
• High output current: ±5 mA
• Voltage options: 1.25 V, 1.8 V, 2.048 V, 2.5 V, 3 V, 3.3 V
• ESD: HBM ±4000 V, CDM ±1000 V

Applications:

• Portable equipment
• Tablets and smartphones
• Hard disk drives
• Sensor modules
• Data acquisition systems
• Medical equipment
• Test equipment

Package:

• DBZ (SOT-23, 3 pins) — 2.92 mm × 2.37 mm
• DCK (SC70, 3 pins) — 2.00 mm × 2.10 mm
• RSE (UQFN, 8 pins) — 1.50 mm × 1.50 mm

• Microsize packages: SC70-3, SOT-23-3, UQFN-8
• Low supply current: 3.9μA (typical)
• Extremely low dropout voltage: 110mV (typical)
• High output current: ±5mA
• Low temperature drift: 30ppm/°C (maximum)
• High initial accuracy: ±0.15% (maximum)
• 0.1Hz to 10Hz noise: 35μVPP (REF3312)
• Voltage options: 1.2V, 1.8V, 2.5V, 3V, 3.3V

• Portable equipment
• Tablets and smartphones
• Hard disk drives
• Sensor modules
• Data acquisition systems
• Medical equipment
• Test equipment

REF3312 in a Single-Supply Signal Chain

Figure 5-1. REF3312, REF3318, REF3320, REF3325, REF3330, REF3333DBZ Package and DCK Package SOT-23-3, SC70-3 (Top View)

Figure 5-2. REF3312, REF3318, REF3320, REF3325, REF3330, REF3333RSE Package UQFN-8 (Top View)

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

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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.

• (1) For more information, see Section 12.
• (2) The package size (length × width) is a nominal value and includes pins, where applicable.

Dropout Voltage vs Load Current