ETA2845S2G

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ETA2845S2G

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仕様

属性
Manufacturer etasolution
Package SOT-23-6
Voltage - Supply 5V~38V
Function Step-down type
Synchronous Rectifier Yes
Number of Outputs 1
Topology Step-Down
Operating Temperature -40℃~+85℃
Switch tube (built-in/external) Built-in
Output Current 400mA
Frequency - Switching 700kHz

概要

Description

The ETA2845S2G is a high-efficiency, synchronous step-down DC-DC converter from ETA Semiconductor, designed for applications requiring compact power solutions. Key features include:
- Input Voltage Range: 4.5V to 18V
- Output Current: Up to 4A
- High Efficiency: Up to 95% (synchronous rectification)
- Adjustable Output: Configurable via external resistors
- Switching Frequency: 500kHz (fixed)
- Protections: Overcurrent, overtemperature, and undervoltage lockout (UVLO)
Ideal for industrial, consumer electronics, and networking devices, it integrates power MOSFETs, reducing external component count. Its small SOP-8 package makes it suitable for space-constrained designs.
For detailed specs, refer to the datasheet or manufacturer documentation.

Equivalent

The ETA2845S2G is a synchronous buck converter. Equivalent alternatives include:
- MP2307 (Monolithic Power Systems)
- LM2675 (Texas Instruments)
- AP3406 (Diodes Incorporated)
- RT8259 (Richtek)
These chips offer similar specifications (e.g., input voltage range, output current, and switching frequency). Verify pin compatibility and electrical characteristics for your specific application.

Features

The ETA2845S2G is a synchronous step-down DC-DC converter with the following key features:
- Input Voltage Range: 4.5V to 18V
- Output Current: Up to 2A
- Switching Frequency: 500kHz (fixed)
- High Efficiency (up to 95%) with synchronous rectification
- Adjustable Output Voltage (0.923V to 16V)
- Integrated Power MOSFETs for compact design
- Protections: Over-current (OCP), thermal shutdown (OTP), and under-voltage lockout (UVLO)
- Low Quiescent Current: ~30μA in shutdown mode
- Package: SOP-8 (EP)
Ideal for battery-powered devices, industrial systems, and consumer electronics requiring efficient power conversion.

Pinout

The ETA2845S2G is a 6-pin synchronous step-down DC-DC converter IC. Its key functions and pin assignments are:
1. VIN (Pin 1) – Input voltage (2.5V–6V).
2. GND (Pin 2) – Ground reference.
3. SW (Pin 3) – Switching node (connects to inductor).
4. FB (Pin 4) – Feedback for output voltage regulation.
5. EN (Pin 5) – Enable control (high = on, low = off).
6. PG (Pin 6) – Power-good indicator (open-drain output).
It provides efficient power conversion with fixed 3.3V or adjustable output, up to 2A load current, and features like soft-start and thermal protection.

Application

The ETA2845S2G is a synchronous step-down DC-DC converter IC, commonly used in:
1. Consumer Electronics: Powering smartphones, tablets, and portable devices.
2. IoT Devices: Efficient power management for sensors and wireless modules.
3. Industrial Equipment: Voltage regulation in automation and control systems.
4. Automotive Electronics: Supporting infotainment and ADAS applications.
5. Embedded Systems: Providing stable power for microcontrollers and FPGAs.
Its high efficiency, compact size, and wide input voltage range (4.5V–18V) make it suitable for battery-powered and space-constrained applications.

Package

The ETA2845S2G is a synchronous step-down DC-DC converter IC. It comes in a SOT23-6 package, which is a small surface-mount type with six pins. This compact package is suitable for space-constrained applications, offering efficient power conversion with minimal footprint.

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