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LM2745MTCX
IC REG CTRLR BUCK 14TSSOP
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規格
| Part Status | Obsolete |
| Output Type | Transistor Driver |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 3V ~ 6V |
| Frequency - Switching | 50kHz ~ 1MHz |
| Duty Cycle (Max) | 86% |
| Synchronous Rectifier | Yes |
| Clock Sync | Yes |
| Control Features | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 14-TSSOP |
| Base Product Number | LM2745 |
概述
Description
The LM2745MTCX is a high-performance, synchronous buck controller designed for step-down voltage regulation applications. It is part of the LM2745 series and is typically used in applications requiring efficient power conversion with precise output voltage control. The device operates at a programmable switching frequency, making it versatile for a range of applications.
Key features of the LM2745MTCX include its ability to support input voltages from 1.26V to 16V and its capability to deliver output voltages as low as 0.6V. It offers high efficiency through synchronous rectification and employs a voltage-mode control method. The controller includes a high-side FET driver and a low-side FET driver, which helps in reducing component count and simplifying circuit design.
Additional features include adjustable output voltage, soft-start capability, and protection mechanisms such as undervoltage lockout and overcurrent protection. These features make the LM2745MTCX suitable for use in a variety of electronics, including computing, telecommunications, and industrial systems, where reliable and efficient power management is critical.
Key features of the LM2745MTCX include its ability to support input voltages from 1.26V to 16V and its capability to deliver output voltages as low as 0.6V. It offers high efficiency through synchronous rectification and employs a voltage-mode control method. The controller includes a high-side FET driver and a low-side FET driver, which helps in reducing component count and simplifying circuit design.
Additional features include adjustable output voltage, soft-start capability, and protection mechanisms such as undervoltage lockout and overcurrent protection. These features make the LM2745MTCX suitable for use in a variety of electronics, including computing, telecommunications, and industrial systems, where reliable and efficient power management is critical.
Features
The LM2745MTCX is a high-performance, synchronous buck regulator designed for efficient power management applications. Key features include a wide input voltage range from 3V to 20V, making it versatile for various applications. It delivers a high output current and offers an adjustable output voltage, providing flexibility in meeting specific design requirements. The device integrates a high-speed PWM controller that allows for fast transient response and high efficiency across a range of loads.
It features an adjustable switching frequency, usually from 50kHz to 1MHz, enabling designers to optimize the trade-off between efficiency and component size. The LM2745MTCX includes overcurrent protection, undervoltage lockout, and thermal shutdown to enhance reliability and protect against fault conditions. The device's small footprint and the availability in a thermally enhanced TSSOP package facilitate easy integration into compact designs.
Overall, the LM2745MTCX is suitable for applications such as point-of-load converters, distributed power systems, and other scenarios requiring efficient step-down voltage regulation with robust protection features.
It features an adjustable switching frequency, usually from 50kHz to 1MHz, enabling designers to optimize the trade-off between efficiency and component size. The LM2745MTCX includes overcurrent protection, undervoltage lockout, and thermal shutdown to enhance reliability and protect against fault conditions. The device's small footprint and the availability in a thermally enhanced TSSOP package facilitate easy integration into compact designs.
Overall, the LM2745MTCX is suitable for applications such as point-of-load converters, distributed power systems, and other scenarios requiring efficient step-down voltage regulation with robust protection features.
Package
The LM2745MTCX is a DC-DC synchronous buck controller IC from Texas Instruments. It is typically housed in a TSSOP (Thin Shrink Small Outline Package) with 16 pins. The "MTC" in the part number refers to the TSSOP package, and the "X" denotes that it is supplied in a tape and reel format for automated assembly.
Pinout
The LM2745MTCX is a synchronous buck PWM controller designed for high-efficiency DC-DC conversion applications. It comes in a 16-pin TSSOP (Thin Shrink Small Outline Package). Here is a brief overview of its pin functions:
1. BOOT: Supplies power to the high-side MOSFET driver.
2. UGATE: Drives the gate of the high-side MOSFET.
3. PHASE: Connects to the switching node.
4. LGATE: Drives the gate of the low-side MOSFET.
5. PGND: Power ground pin for the low-side driver.
6. VCC: Supplies power to the internal control circuitry.
7. FB: Feedback input for output voltage regulation.
8. COMP: Compensation pin for stability and transient response.
9. EN: Enable input to turn the controller on or off.
10. SS/TRACK: Soft-start/tracking input for controlled startup.
11. VDD: Supply voltage for the internal logic.
12. GND: Signal ground.
13. VIN: Input voltage supply pin.
14. SYNC: Synchronization input for frequency control.
15. RT: Resistor connection to set the switching frequency.
16. NC: No connection.
This configuration ensures efficient power regulation and flexibility for various applications.
1. BOOT: Supplies power to the high-side MOSFET driver.
2. UGATE: Drives the gate of the high-side MOSFET.
3. PHASE: Connects to the switching node.
4. LGATE: Drives the gate of the low-side MOSFET.
5. PGND: Power ground pin for the low-side driver.
6. VCC: Supplies power to the internal control circuitry.
7. FB: Feedback input for output voltage regulation.
8. COMP: Compensation pin for stability and transient response.
9. EN: Enable input to turn the controller on or off.
10. SS/TRACK: Soft-start/tracking input for controlled startup.
11. VDD: Supply voltage for the internal logic.
12. GND: Signal ground.
13. VIN: Input voltage supply pin.
14. SYNC: Synchronization input for frequency control.
15. RT: Resistor connection to set the switching frequency.
16. NC: No connection.
This configuration ensures efficient power regulation and flexibility for various applications.
Manufacturer
The LM2745MTCX is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components, including microcontrollers, processors, and analog devices. It is known for its innovation and contributions to the electronics industry, providing essential components for various applications like consumer electronics, automotive systems, industrial equipment, and communication devices. TI focuses on developing technologies that enable the advancement of next-generation electronic devices.
Application
The LM2745MTCX is a high-speed synchronous buck regulator controller primarily used in applications requiring efficient step-down voltage conversion. Typical application areas include telecommunications, networking equipment, high-performance computing systems, and power management for processors and ASICs. Its features make it suitable for use in distributed power architectures, voltage regulation modules (VRMs), and point-of-load (POL) converters in various electronic devices.
Equivalent
The LM2745MTCX chip is a synchronous buck controller designed for high-frequency DC-DC conversion applications. Equivalent products include the TPS40180 from Texas Instruments, LTC3779 from Analog Devices, and the IR3845 from Infineon Technologies. These alternatives offer similar functionalities for DC-DC conversion with varying specifications and features. Always verify electrical characteristics and other specifications to ensure compatibility with your specific application.
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