BL1117-CX

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BL1117-CX

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Specifications

Attribute Value
Manufacturer BL(Shanghai Belling)
Package / Case SOT-223-4
Operating Temperature -40℃~+85℃
Voltage - Supply 12V
Output Type Adjustable
Number of Outputs 1
Current - Output 1A
Voltage Dropout 1.5V@(1A)
Features Overcurrent Protection
Output Voltage 1.25V~12V
Output Configuration Positive electrode

Overview

Description

The BL1117-CX is a low-dropout (LDO) linear voltage regulator designed to provide stable output voltages with minimal power loss. It supports adjustable or fixed output voltages (e.g., 1.8V, 2.5V, 3.3V) and features a low dropout voltage (typically 1.1V at 1A).
Key characteristics:
- Input Voltage Range: Up to 15V.
- Output Current: Up to 1A.
- Low Quiescent Current: ~5mA.
- Protections: Overcurrent and thermal shutdown.
Applications include powering microcontrollers, sensors, and other low-power electronics. Its compact package (e.g., SOT-223) makes it suitable for space-constrained designs.
For adjustable versions, external resistors set the output voltage. Fixed versions simplify design by eliminating external components. Ensure proper heat dissipation for high-current applications.
For detailed specs, refer to the datasheet.

Equivalent

The BL1117-CX is a low-dropout (LDO) voltage regulator. Equivalent products include:
- AMS1117 (Advanced Monolithic Systems)
- LM1117 (Texas Instruments)
- AZ1117 (Diodes Incorporated)
- ME1117 (Micro Electronics)
- SPX1117 (Sipex/Exar)
These are pin-compatible and offer similar specs (1A output, adjustable/fixed voltages). Verify exact parameters (dropout voltage, current limit) for your application.

Pinout

The BL1117-CX is a low-dropout (LDO) voltage regulator with 3 pins (TO-252/SOT-223 package).
Pin Functions:
1. Input (VIN): Receives the input voltage (up to 15V).
2. Ground (GND): Reference for regulation (adjustable versions use this pin for feedback).
3. Output (VOUT): Provides a fixed (e.g., 3.3V, 5V) or adjustable regulated voltage (1.25V–13.8V).
Key Features:
- Output Current: Up to 1A.
- Dropout Voltage: ~1.1V at 1A.
- Fixed/Adjustable: Depends on variant (e.g., BL1117-3.3 for fixed 3.3V).
Compact and widely used for power stabilization in circuits.

Manufacturer

The BL1117-CX is a low-dropout (LDO) voltage regulator manufactured by BL Microsystems (BLM), a Chinese semiconductor company specializing in power management ICs.
BL Microsystems, founded in 2003, focuses on analog and mixed-signal ICs, including LDO regulators, DC-DC converters, and battery management chips. The company serves consumer electronics, industrial, and automotive markets.
The BL1117-CX is a fixed/adjutable LDO with a typical dropout voltage of 1.1V and output currents up to 1A, commonly used in power supply circuits.
BLM is known for cost-effective solutions but is less prominent than global brands like TI or STMicroelectronics.

Application

The BL1117-CX is a low-dropout (LDO) voltage regulator commonly used in:
1. Consumer Electronics – Powering microcontrollers, sensors, and displays in devices like smart home gadgets.
2. Embedded Systems – Providing stable voltage for IoT modules and single-board computers (e.g., Raspberry Pi).
3. Automotive Electronics – Supporting infotainment systems and dashcams.
4. Industrial Control – Regulating power for PLCs and motor drivers.
5. Telecom Equipment – Ensuring stable voltage in routers and modems.
Its low dropout (1.1V typical), 1A output current, and fixed/adjutable voltage options make it versatile for compact, efficient power management.

Package

The BL1117-CX is a low-dropout (LDO) voltage regulator available in a SOT-223 package. This compact, surface-mount package has three pins and a thermal pad for heat dissipation, making it suitable for space-constrained applications. The SOT-223 package balances size and power handling, supporting currents up to 1A. It's commonly used in power management circuits for stable voltage regulation.

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