BL1117-33CX

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BL1117-33CX

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Specifications

Attribute Value
Manufacturer BL(Shanghai Belling)
Package / Case SOT-223
Operating Temperature -40℃~+85℃
Voltage - Supply 12V
Output Type Fixed
Number of Outputs 1
Current - Output 1A
Voltage Dropout 1.5V@(1A)
Power Supply Rejection Ratio (PSRR) 60dB@(120Hz)
Features Overcurrent Protection
Output Voltage 3.3V
Output Configuration Positive electrode

Overview

Description

The BL1117-33CX is a low-dropout (LDO) linear voltage regulator designed to provide a fixed 3.3V output with high accuracy and low power dissipation. Key features include:
- Input Voltage Range: Up to 15V (typical).
- Dropout Voltage: ~1.1V at 800mA load.
- Output Current: Up to 1A (with proper heat dissipation).
- Low Quiescent Current: ~5mA (typical).
- Protections: Overcurrent and thermal shutdown.
It is commonly used in battery-powered devices, embedded systems, and consumer electronics where stable 3.3V power is required. The CX suffix often denotes a SOT-223 package, offering a compact footprint.
For optimal performance, ensure input voltage ≥ 4.4V and use input/output capacitors (typically 10µF) for stability. Check the datasheet for exact specifications.

Equivalent

Equivalent products to the BL1117-33CX (3.3V LDO regulator) include:
- AMS1117-3.3
- LM1117-3.3
- AZ1117-3.3
- LT1117-3.3
- AP1117-3.3
These are 3.3V fixed-output LDO regulators with similar specs (1A output, ~1V dropout). Verify pin compatibility and electrical characteristics for your application.

Features

The BL1117-33CX is a low-dropout (LDO) voltage regulator with the following key features:
- Fixed Output Voltage: 3.3V (±2% accuracy).
- High Current Capacity: Up to 800mA.
- Low Dropout Voltage: ~1.1V at 800mA.
- Low Quiescent Current: ~5mA (typical).
- Protections: Overcurrent and thermal shutdown.
- Package: SOT-223 (compact, surface-mount).
- Wide Input Range: Up to 15V.
- Stable with Low-ESR Capacitors: Supports ceramic or tantalum capacitors.
Ideal for 3.3V power supply applications in embedded systems, IoT, and consumer electronics.

Manufacturer

The BL1117-33CX is a 3.3V low-dropout (LDO) voltage regulator manufactured by BL Micro (Shanghai Belling Co., Ltd.), a Chinese semiconductor company specializing in analog and mixed-signal ICs.
BL Micro is a well-established firm founded in 1988, focusing on power management, audio amplifiers, and other analog ICs. It serves consumer electronics, industrial, and automotive markets. The company is known for cost-effective solutions and competes with global brands like TI and ON Semiconductor.
The BL1117-33CX is a common LDO regulator, similar to the AMS1117, offering stable 3.3V output with low dropout voltage. It's widely used in embedded systems and power supply designs.

Application

The BL1117-33CX is a 3.3V LDO voltage regulator commonly used in:
1. Consumer Electronics – Powering microcontrollers, sensors, and low-power ICs in devices like smart home gadgets.
2. Embedded Systems – Providing stable voltage for Raspberry Pi, Arduino, and other development boards.
3. Communication Devices – Used in routers, modems, and IoT modules for reliable power supply.
4. Automotive Electronics – Supporting infotainment systems and onboard sensors.
5. Industrial Control – Ensuring stable voltage for PLCs and measurement equipment.
Its low dropout, high accuracy, and thermal protection make it ideal for compact, power-sensitive applications.

Package

The BL1117-33CX is a low-dropout (LDO) voltage regulator in a SOT-223 package. It provides a fixed 3.3V output and is commonly used for power management in compact electronic designs. The SOT-223 package offers good thermal performance and is suitable for surface-mount applications.

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