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LM25574MTX
IC REG BUCK ADJ 500MA 16TSSOP
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規格
| Series | SIMPLE SWITCHER® |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 6V |
| Voltage - Input (Max) | 42V |
| Voltage - Output (Min/Fixed) | 1.225V |
| Voltage - Output (Max) | 40V |
| Current - Output | 500mA |
| Frequency - Switching | 50kHz ~ 1MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 16-TSSOP |
| Base Product Number | LM25574 |
概述
Description
The LM25574MTX is a high-performance, wide input voltage range buck switching regulator from Texas Instruments, designed for efficient power conversion in various applications. It operates with an input range of 6V to 42V and can deliver up to 0.5A of output current. This regulator features a constant on-time architecture, which enables fast transient response and simplifies loop compensation.
The LM25574MTX integrates several protection features, including thermal shutdown, cycle-by-cycle current limiting, and under-voltage lockout, ensuring reliable operation under different conditions. Its adjustable switching frequency, typically ranging from 50 kHz to 1 MHz, provides flexibility in optimizing for efficiency or component size.
This device is suitable for use in distributed power systems, battery-powered equipment, industrial controls, and automotive applications. It is available in a thermally enhanced TSSOP package, making it ideal for space-constrained designs. Additionally, the LM25574MTX supports synchronous rectification, which further improves efficiency by reducing switching losses.
Overall, the LM25574MTX is a versatile and robust component for engineers looking to design efficient power management solutions in high-voltage applications.
The LM25574MTX integrates several protection features, including thermal shutdown, cycle-by-cycle current limiting, and under-voltage lockout, ensuring reliable operation under different conditions. Its adjustable switching frequency, typically ranging from 50 kHz to 1 MHz, provides flexibility in optimizing for efficiency or component size.
This device is suitable for use in distributed power systems, battery-powered equipment, industrial controls, and automotive applications. It is available in a thermally enhanced TSSOP package, making it ideal for space-constrained designs. Additionally, the LM25574MTX supports synchronous rectification, which further improves efficiency by reducing switching losses.
Overall, the LM25574MTX is a versatile and robust component for engineers looking to design efficient power management solutions in high-voltage applications.
Features
The LM25574MTX is a step-down switching regulator designed by Texas Instruments. It is capable of driving up to a 4.5A load from a wide input voltage range of 6V to 42V. Key features include:
1. Adjustable Output: The output voltage is adjustable via an external resistor divider.
2. High Efficiency: It offers high efficiency across the load range due to its current-mode control architecture.
3. Integrated Features: It includes an internal high-side N-channel MOSFET and a thermal shutdown protection.
4. Low Shutdown Current: The regulator has a low shutdown current of approximately 10 µA, optimizing power savings.
5. Protection Mechanisms: Features overvoltage protection, thermal shutdown, and cycle-by-cycle current limit protection.
6. Frequency Synchronization: The switching frequency is adjustable and can be synchronized to an external clock.
7. Soft-Start Capability: It includes a programmable soft-start feature to reduce inrush currents.
8. Wide Temperature Range: The device operates over a temperature range of -40°C to 125°C, suitable for industrial applications.
These features make the LM25574MTX well-suited for applications requiring reliable power delivery over varying input conditions.
1. Adjustable Output: The output voltage is adjustable via an external resistor divider.
2. High Efficiency: It offers high efficiency across the load range due to its current-mode control architecture.
3. Integrated Features: It includes an internal high-side N-channel MOSFET and a thermal shutdown protection.
4. Low Shutdown Current: The regulator has a low shutdown current of approximately 10 µA, optimizing power savings.
5. Protection Mechanisms: Features overvoltage protection, thermal shutdown, and cycle-by-cycle current limit protection.
6. Frequency Synchronization: The switching frequency is adjustable and can be synchronized to an external clock.
7. Soft-Start Capability: It includes a programmable soft-start feature to reduce inrush currents.
8. Wide Temperature Range: The device operates over a temperature range of -40°C to 125°C, suitable for industrial applications.
These features make the LM25574MTX well-suited for applications requiring reliable power delivery over varying input conditions.
Package
The LM25574MTX is a Texas Instruments switching regulator IC designed for power management applications. It comes in a TO-PMOD (TO-263) package, which is a surface-mount package type. This package provides efficient thermal management and is suitable for high-current applications.
Pinout
The LM25574MTX is a 42V, 500mA step-down voltage regulator from Texas Instruments, typically used for DC-DC conversion applications. It comes in a 16-pin TSSOP package. Here's a brief rundown of the pin functions:
1. VIN: Input voltage supply pin.
2. SW: Switch pin; connected to the inductor.
3. BST: Bootstrap capacitor connection.
4. RT: Resistor timing pin to set the switching frequency.
5. SYNC: Synchronization input for external clock.
6. FB: Feedback pin for output voltage regulation.
7. COMP: Compensation network connection.
8. SS: Soft-start control pin.
9. UVLO: Undervoltage lockout setpoint.
10. EN: Enable pin; turns the regulator on/off.
11. VCC: Internal bias supply pin.
12. GND: Ground.
13. RAMP: Ramp control pin.
14. PGOOD: Power good indicator.
15. NC: No connection.
16. AGND: Analog ground.
This configuration allows the LM25574MTX to efficiently convert a higher input voltage into a lower output voltage, suitable for powering various electronic components and devices.
1. VIN: Input voltage supply pin.
2. SW: Switch pin; connected to the inductor.
3. BST: Bootstrap capacitor connection.
4. RT: Resistor timing pin to set the switching frequency.
5. SYNC: Synchronization input for external clock.
6. FB: Feedback pin for output voltage regulation.
7. COMP: Compensation network connection.
8. SS: Soft-start control pin.
9. UVLO: Undervoltage lockout setpoint.
10. EN: Enable pin; turns the regulator on/off.
11. VCC: Internal bias supply pin.
12. GND: Ground.
13. RAMP: Ramp control pin.
14. PGOOD: Power good indicator.
15. NC: No connection.
16. AGND: Analog ground.
This configuration allows the LM25574MTX to efficiently convert a higher input voltage into a lower output voltage, suitable for powering various electronic components and devices.
Manufacturer
The LM25574MTX is manufactured by Texas Instruments Incorporated (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic components and integrated circuits used in various applications, including industrial, automotive, personal electronics, and communications. TI is known for its innovation in analog and embedded processing products.
Equivalent
The LM25574MTX is a step-down voltage regulator from Texas Instruments. Equivalent or similar products could include:
1. LM2574 series from Texas Instruments
2. MC34063 from ON Semiconductor
3. L4973 from STMicroelectronics
4. MAX5035 from Maxim Integrated
5. LT1766 from Analog Devices
When choosing an equivalent, consider the specific requirements such as input/output voltage range, current rating, switching frequency, and package type to ensure compatibility with your application.
1. LM2574 series from Texas Instruments
2. MC34063 from ON Semiconductor
3. L4973 from STMicroelectronics
4. MAX5035 from Maxim Integrated
5. LT1766 from Analog Devices
When choosing an equivalent, consider the specific requirements such as input/output voltage range, current rating, switching frequency, and package type to ensure compatibility with your application.
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