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LP5907MFX-3.3/NOPB

TILP5907MFX-3.3/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Fixed 1 Output 250mA SOT-23-5
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Overview

The LP5907MFX-3.3/NOPB is a low-noise, linear voltage regulator designed to deliver up to 250mA of output current with a fixed 3.3V output. It is engineered for high-performance applications where low output noise and high Power Supply Rejection Ratio (PSRR) are critical for signal integrity. This LDO is particularly effective in space-constrained designs as it does not require a noise bypass capacitor and allows for remote output capacitor placement.

Why Choose This Part

The LP5907 offers an exceptional PSRR of 82dB at 1kHz and a low output noise floor of 6.5 microvolts RMS without an external bypass capacitor. Its ultra-low dropout characteristics and low 425 microamp typical quiescent current make it highly efficient for battery-powered applications. Additionally, the device includes robust protection features such as thermal-overload and short-circuit protection.

Applications

RF and Wireless Signal Chains
Providing clean power to RF transceivers and sensitive analog front-ends where low noise is essential to prevent signal degradation.
Mobile Handheld Devices
Integrated into smartphones and tablets where high PSRR and small SOT-23-5 footprint minimize PCB area.
Precision Instrumentation
Powering high-accuracy sensors and ADCs that require a stable 3.3V rail with minimal thermal drift over the -40 to 125 degrees Celsius range.
Communication Equipment
Used in networking hardware to filter power supply ripple and provide a regulated supply to low-power microcontrollers.

Key Specifications

PSRR 90dB ~ 60dB (100Hz ~ 100kHz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Control Features Enable
Current - Output 250mA
Protection Features Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 5.5V
Voltage Dropout (Max) 0.25V @ 250mA
Current - Supply (Max) 425 uA
Supplier Device Package SOT-23-5
Current - Quiescent (Iq) 25 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this regulator, place a 1 microfarad ceramic capacitor on both the input and output pins for stability. Ensure the Enable (EN) pin is driven high to activate the device, or tied to VIN for always-on operation. The SOT-23-5 package provides a standard footprint that can be easily prototyped on common breakout boards or evaluation modules like the LP5907UV-3.3EVM.

Categories

Power Management > LDO Voltage Regulators