St MicroElectronics LD1117 3.3V Low Dropout Voltage Regulator 800mA TO-220
St MicroElectronics LD1117 3.3V LDO voltage regulator, 800mA output in TO-220 through-hole package with internal current and thermal limiting.
The St MicroElectronics LD1117 3.3V Low Dropout Voltage Regulator 800mA TO-220 is a linear, fixed-output voltage regulator that provides a stable 3.3V output with up to 800mA of output current, suited to power management tasks where a consistent supply voltage is required.
Overview
The LD1117V33C uses an NPN pass transistor architecture, which directs most of the quiescent current into the load rather than wasting it. The regulator maintains regulation when the input voltage is only slightly higher than the 3.3V output, with a typical dropout voltage of 1V. Stability is achieved with a common 10µF minimum capacitor on the output.
Key Features
- Output voltage tolerance of ±1% at 25°C, achieved through on-chip trimming
- Output voltage tolerance of 2% across the full operating temperature range of -40°C to 125°C
- Supply voltage rejection of 75dB (typical) to help filter noise and ripple from the input supply
- Internal current and thermal limiting for overload protection
- Housed in a TO-220 package for through-hole mounting
Applications
The regulator is suited to power management in a variety of electronic systems, including:
- Power supplies for microcontrollers, FPGAs, and digital logic
- Battery-powered equipment
- Post-regulation for switching power
Physical Details
The regulator has a weight of 2.04 g and product dimensions of 3.3 (width), 1.5 (depth) and 4.3 (height). Key electrical figures, including tolerance, dropout voltage and supply voltage rejection, are listed in the Additional Information section.
Choose the St MicroElectronics LD1117 3.3V Low Dropout Voltage Regulator 800mA TO-220 when you need a fixed 3.3V supply capable of delivering 800mA in a TO-220 through-hole package.
- Power supplies for microcontrollers
- Power supplies for FPGAs
- Power supplies for digital logic
- Battery-powered equipment
- Model: LD1117V33C
- Output Voltage: 3.3V (fixed)
- Output Current: 800mA
- Output Voltage Tolerance: ±1% at 25°C
- Output Voltage Tolerance: 2% across -40°C to 125°C
- Dropout Voltage: 1V (typical)
- Minimum Output Capacitor: 10µF
- Supply Voltage Rejection: 75dB (typical)
- Pass Transistor: NPN
- Package: TO-220
- Mounting: Through-hole
- Special Feature: Internal current and thermal limiting
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Weight: 2.04 g
Documents
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