Overview
The LDL112PV33R is an ultra-low-dropout (LDO) linear voltage regulator from STMicroelectronics . It provides a fixed 3.3V output voltage and a maximum output current of 1.2A . Its extremely low dropout voltage, low noise, excellent power consumption , and comprehensive protection mechanisms make it ideal for powering microcontrollers (MCUs), communication modules, sensitive analog circuits, and low-noise loads .
The LDL112 series utilizes advanced process technology to maintain low dropout voltage even at high current output, making it suitable for battery-powered applications and those requiring high-efficiency linear voltage regulation. The PowerVDFN (3×3mm) package offers excellent heat dissipation and facilitates high-density PCB design.
Core parameters
Parameter | Numerical |
Output voltage | Fixed 3.3V |
Maximum output current | 1.2A |
Input voltage range | 2.5V ~ 18V |
Dropout Voltage | 200mV (@1.2A typical) |
Quiescent current (Iq) | 70µA (typical) |
Output voltage accuracy | ±2% |
Output noise | 35µVrms (10Hz – 100kHz) |
PSRR | 80dB @ 100Hz / 60dB @ 1MHz |
Protection function | Overcurrent protection, short circuit protection, over temperature shutdown |
Package | PowerVDFN-6 (3×3mm) |
Operating temperature range | –40°C ~ +125°C (Industrial Grade) |
Heat dissipation capacity | Enhanced bottom heat dissipation pad design |
Features
High current output + low voltage drop
Maintaining low voltage dropout at high current improves system power efficiency and is particularly suitable for battery-powered scenarios.
Low noise and high PSRR
It effectively suppresses power supply noise conduction and is suitable for sensitive circuits such as RF, sensors, and ADC.
Ultra-low static power consumption
Reduce total system power consumption in light load or standby state and extend battery life.
Complete power protection mechanism
Over-temperature and over-current protection ensures load and power safety.
Compact package + excellent heat dissipation design
Adapt to high-density fabric boards, while enhancing heat dissipation and improving continuous output capabilities.
Typical application scenarios
MCU/SoC power supply
STM32, ESP32, ARM main control power supply voltage regulation.
Wireless communication system
Wi-Fi / BLE module, LoRa, cellular communication module.
Industry and Automation
PLC, sensors, data acquisition systems, etc.
Audio and RF circuits
Low-noise power supplies enhance signal integrity.
Portable/Battery-Powered Devices
Handheld devices, smart wearables, and medical devices.
Performance Comparison
Index | LDL112PV33R | AMS1117-3.3 (common comparison LDO) |
Maximum output current | 1.2A | 1A |
Pressure difference (@1A) | ~200mV | ~1.1V |
Quiescent current | 70µA | 5-10mA |
Output noise | Low | high |
Heat dissipation performance | excellent | generally |
Efficiency (battery powered) | high | Low (large pressure difference leads to large loss) |
LDL112PV33R leads the market in power consumption, heat dissipation and noise performance , and is suitable for high-end designs to replace AMS1117.
Manufacturer Profile
STMicroelectronics is a leading global semiconductor supplier, renowned for its power management products’ high reliability, low power consumption, and high performance . The LDL112 series is a key component in ST’s high-performance LDO solutions, widely used in smart products and industrial systems.
Why choose LDL112PV33R?
● 1.2A output + voltage dropout of only 200mV
● Excellent noise performance, suitable for sensitive analog/RF loads
● 70µA ultra-low quiescent current, significant energy saving
● Industrial-grade reliability and complete protection
● Small package with strong heat dissipation, convenient for highly integrated design
Frequently Asked Questions (FAQ)
Q1: Is it suitable as the main voltage regulator for battery-powered systems?
Yes. This product offers high conversion efficiency, low standby power consumption, and a wide load range , making it particularly well-suited for battery-powered devices, effectively extending battery life. Its excellent light-load performance allows it to maintain extremely low power consumption in sleep mode.
Q2: Does it support 18V input?
Yes, the input voltage range covers 2.5V ~ 18V . However, when approaching the maximum input voltage, please note:
Does the output power meet the margin requirements?
Is the chip temperature rise and heat dissipation design reasonable?
Evaluate losses and thermal performance based on pressure difference and load size
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Product Details: Win Source – LDL112PV33R
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