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LTC3411EMS
+BOM1.25A, 4MHZ, SYNCHRONOUS STEP-DO
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メーカーリニアテクノロジー
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メーカー品番 #LTC3411EMS
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データシート LTC3411EMS DataSheet
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パッケージ MSOP-10
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在庫状況2033
365 日間品質保証
7*24 日間の品質保証
90-時間単位のサービス保証
1日間のアフターサービス保証
仕様
| 属性 | 値 |
| Package / Case | Bulk |
| Part Status | Active |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.625V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 5V |
| Current - Output | 1.25A |
| Frequency - Switching | 1MHz |
| Synchronous Rectifier | Yes |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
概要
Description
The converter can deliver up to 1.25A of continuous output current with efficiency as high as 95%. It features a fixed switching frequency of 1.5MHz, allowing the use of small inductors and capacitors, thus minimizing the solution size. The LTC3411EMS incorporates current-mode control for fast transient response and cycle-by-cycle current limiting.
Additional features include low dropout operation, soft-start functionality, over-temperature protection, and a power good indicator. The device is available in an MSOP-10 package, ideal for space-constrained applications. Its combination of high efficiency, compact size, and robust feature set makes it a popular choice for a wide range of portable electronic devices.
Equivalent
1. TPS62130 by Texas Instruments – 3A synchronous step-down converter.
2. MP2338 by MPS (Monolithic Power Systems) – 3A, 23V synchronous step-down converter.
3. ADP2300 by Analog Devices – 2A, high-efficiency step-down regulator.
Ensure compatibility by checking the specific voltage, current requirements, and feature sets relative to your application.
Features
1. Input Voltage Range: It operates from a 2.5V to 5.5V input voltage range, making it suitable for single-cell lithium-ion batteries and other low voltage sources.
2. Output Current: The device can deliver up to 1.25A of continuous output current.
3. Efficiency: It offers high efficiency, reaching up to 96%, thanks to its synchronous rectification which minimizes power loss.
4. Switching Frequency: The LTC3411EMS has a high switching frequency of up to 4MHz, allowing for the use of small external components and a compact design.
5. Low Dropout Operation: It supports low dropout operation, extending battery life in portable applications.
6. Integrated Power Switches: The regulator integrates both the high-side and low-side power switches, reducing the need for external components.
7. Soft-Start Function: It includes a soft-start feature to limit inrush current during startup.
8. Protection Features: The device integrates over-temperature and over-current protection for enhanced reliability.
These features make it ideal for portable electronic devices requiring efficient power management.
Pinout
The pin functions are as follows:
1. SW (Switch Node): Connects to the inductor, carries the switching current.
2. VIN (Input Voltage): Supplies the input voltage to the device.
3. RUN/SS (Run/Soft-Start Control): Controls the turn-on/off and soft-start of the regulator.
4. GND (Ground): Common ground for both power and signal connections.
5. ISET (Current Set): Sets the maximum output current.
6. VFB (Feedback Voltage): Receives the feedback voltage from the output to regulate it.
7. ITH (Error Amplifier Compensation): Connects to compensation network to stabilize the control loop.
8. SYNC/MODE (Synchronization/Mode Control): Determines the operating mode (pulse skipping or forced continuous).
9. PGOOD (Power Good Indicator): Indicates if the output voltage is within regulation.
10. VOUTS (Output Voltage Sense): Senses the output voltage for regulation.
These pins contribute to the device's function of efficiently converting a higher input voltage to a lower output voltage with high performance and stability.
Manufacturer
Application
1. Portable Electronics: Ideal for devices like smartphones, tablets, and digital cameras due to its ability to efficiently manage power in a small form factor.
2. Distributed Power Systems: Suitable for systems requiring point-of-load regulation and efficient power distribution.
3. Battery-Powered Equipment: Used in battery-operated devices for its low quiescent current and high efficiency, which extends battery life.
4. Telecommunications: Supports telecommunications equipment by providing stable power supply regulation.
5. Networking Equipment: Integrated into routers and switches to ensure efficient power management.
These applications leverage the LTC3411EMS's features such as high switching frequency, low output voltage ripple, and compact footprint.