SPX3819M5

Part: SPX3819 from MaxLinear

Type: 500mA Low-Noise LDO Voltage Regulator

Description: A positive voltage regulator with 2.5–16 V input, up to 950 mA current limit, low dropout voltage (340 mV at 500 mA), and low noise output (40 μV RMS possible). It offers fixed and adjustable output voltage options and features an ON/OFF switched input.

Operating Conditions:

• Supply voltage: 2.5V to 16V
• Operating temperature: -40°C to +125°C (Junction Temperature Range)
• Output voltage range: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V fixed; ≥ 1.235V adjustable

Absolute Maximum Ratings:

• Max supply voltage: +20V
• Max continuous current: 950 mA (Current Limit)
• Max junction/storage temperature: 150°C

Key Specs:

• Output Voltage Tolerance: ±1% max (at T J = 25°C)
• Dropout Voltage (V IN -V OUT ): 340 mV typ (I L = 500mA)
• Quiescent Current (I GND ): 90 μA typ (I L = 100μA)
• Current Limit (I LIMIT ): 800 mA typ, 950 mA max (V OUT = 0V)
• Output Noise (e NO ): 40 μV RMS typ (I L = 10mA, C BYP = 1μF, 10Hz - 100kHz)
• Line Regulation: 0.04 %/V typ (V IN = V OUT +1 to 16V)
• Load Regulation: 0.05 % typ (I L = 0.1mA to 500mA)
• Ripple Rejection (PSRR): 70 dB typ

Features:

• Low Noise:

• Low Noise: 40μV Possible

• High Accuracy: 1%

• Reverse Battery Protection

• Low Dropout: 340mV at Full Load

• Low Quiescent Current: 90μA

• Zero Off-Mode Current

• Fixed & Adjustable Output Voltages:

• -1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.3V & 5.0V Fixed Output Voltages

• -≥ 1.235V Adjustable Output Voltages

• Available in RoHS Compliant, Lead Free Packages:

• -5-pin SOT-23, 8-pin SOIC and 8-pin DFN

Rev. 2.0.5

• Portable Consumer Equipment

• Portable Instrumentation

• Industrial Equipment

• SMPS Post Regulators

Fig. 2: SPX3819 Pin Assignment

Note 2: Not applicable to output voltage 2V or less.

Specifications with standard type are for an Operating Junction Temperature of TJ = 25°C only; limits applying over the full Operating Junction Temperature range are denoted by a '·'. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise indicated, VIN = VOUT + 1V (VIN = VOUT + 1.2V for 1.2V option), IL = 100μA, CL = 1μF, VEN ≥ 2.5V, T A = TJ = 25°C.

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

• Storage Temperature..............................-65°C to 150°C
• Junction Temperature ..........................................150°C
• Power Dissipation ................................ Internally Limited
• Lead Temperature (Soldering, 5 sec) .....................260°C
• ESD Rating (HBM - Human Body Model).................... 1kV

Fig. 1: SPX3819 Application

Fig. 1: SPX3819 Application

Circuit

8-PIN 2X3 DFN