LTC3525ISC6-3.3

Product Overview

Category

The LTC3525ISC6-3.3 belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators category.

Use

This product is primarily used for voltage regulation in various electronic devices and systems.

Characteristics

• Input Voltage Range: 1.8V to 5.5V
• Output Voltage: 3.3V
• Output Current: Up to 100mA
• Efficiency: Up to 95%
• Low Quiescent Current: 16µA
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to 85°C
• Package Type: SOT-23-6
• RoHS Compliant: Yes

Package and Quantity

The LTC3525ISC6-3.3 is available in a small outline transistor (SOT) package with six leads. It is commonly sold in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 1.8V to 5.5V
• Output Voltage: 3.3V ±2%
• Output Current: Up to 100mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 16µA
• Shutdown Current: <1µA
• Ripple Rejection: 70dB at 1kHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 85°C
• Package Type: SOT-23-6

Pin Configuration

The LTC3525ISC6-3.3 has six pins arranged as follows:

```

---

| | --| VIN GND |-- Pin 1 --| EN SW |-- Pin 2 --| FB LX |-- Pin 3 --| PGND VOUT|-- Pin 4 --| NC |-- Pin 5 |___________| ```

1. VIN: Input Voltage Pin
2. EN: Enable Pin
3. FB: Feedback Pin
4. PGND: Power Ground Pin
5. NC: No Connection
6. LX: Switching Node Pin
7. VOUT: Output Voltage Pin

Functional Features

• Wide input voltage range allows compatibility with various power sources.
• Low quiescent current ensures minimal power consumption during standby or idle mode.
• High efficiency helps conserve energy and reduce heat dissipation.
• Shutdown mode with ultra-low current consumption enables power-saving when the device is not in use.
• Excellent ripple rejection minimizes output voltage fluctuations caused by input voltage variations.

Advantages and Disadvantages

Advantages

• Wide input voltage range provides flexibility in different applications.
• Low quiescent current enhances energy efficiency.
• Small package size allows for space-saving designs.
• RoHS compliance ensures environmental friendliness.

Disadvantages

• Limited output current may not be suitable for high-power applications.
• Dropout voltage of 200mV at 100mA may affect performance in low voltage scenarios.

Working Principles

The LTC3525ISC6-3.3 is a step-up DC-DC converter that utilizes a synchronous rectification architecture. It operates by converting a lower input voltage to a higher output voltage using an internal switch and control circuitry. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable 3.3V output. The enable pin (EN) controls the device's operation, allowing it to enter a low-power shutdown mode when not required.

Detailed Application Field Plans

The LTC3525ISC6-3.3 is commonly used in various battery-powered applications, such as portable devices, wireless communication systems, and handheld instruments. It is suitable for boosting the voltage from a single-cell lithium-ion or lithium-polymer battery to power microcontrollers, sensors, and other low-power components.

Detailed and Complete Alternative Models

1. LTC3525ESC6-3.3: Similar to LTC3525ISC6-3.3 but available in an exposed pad SOT package.
2. LTC3525HSC6-3.3: Higher temperature range variant (-40°C to 125°C) of LTC3525ISC6-3.3.
3. LTC3525ISC6-5: Output voltage variant of 5V instead of 3.3V.

These alternative models offer similar functionality with slight variations in specifications to cater to different application requirements.

In conclusion, the LTC3525ISC6-3.3 is a voltage regulator IC that provides efficient and reliable voltage regulation for various electronic devices. Its wide input voltage range, low quiescent current, and small package size make it suitable for a range