LD2985BM25R

Product Overview

• Category: Integrated Circuit
• Use: Voltage Regulator
• Characteristics: Low Dropout, 150mA Output Current, Fixed Output Voltage
• Package: SOT-23-5
• Essence: LD2985BM25R is a voltage regulator IC designed to provide a fixed output voltage with low dropout characteristics.
• Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 2.5V
• Output Current: 150mA
• Dropout Voltage: 400mV (typical)
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LD2985BM25R has a SOT-23-5 package with the following pin configuration:

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| | |____| | | 1 || 5 2 || 4 3 |__| ```

Pin Description: 1. GND: Ground 2. VOUT: Output Voltage 3. VIN: Input Voltage 4. NC: No Connection 5. BYPASS: Bypass Capacitor

Functional Features

• Low dropout voltage ensures stable output even when the input voltage is close to the output voltage.
• Fixed output voltage of 2.5V eliminates the need for external voltage divider circuits.
• Low quiescent current minimizes power consumption.
• Built-in thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage allows for efficient regulation. - Small package size enables space-saving designs. - Fixed output voltage simplifies circuit design.

Disadvantages: - Limited output current of 150mA may not be suitable for high-power applications. - SOT-23-5 package may require careful handling during soldering.

Working Principles

The LD2985BM25R is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage and adjusting the pass transistor accordingly. The dropout voltage is minimized by using a low VCE(sat) PNP transistor.

Detailed Application Field Plans

The LD2985BM25R can be used in various applications, including but not limited to: 1. Battery-powered devices requiring a stable 2.5V supply voltage. 2. Portable audio players and handheld devices. 3. Embedded systems and microcontroller-based projects. 4. Automotive electronics. 5. Industrial control systems.

Alternative Models

Here are some alternative models that provide similar functionality: 1. LM1117-2.5: Fixed 2.5V voltage regulator, available in different packages. 2. LP2985-2.5: Low dropout voltage regulator with fixed 2.5V output. 3. LT1763-2.5: High-performance LDO regulator with 2.5V output voltage.

These alternatives offer comparable features and can be considered based on specific requirements and availability.

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