Overview
The LMR23630ADDAR, produced by Texas Instruments, is a SIMPLE SWITCHER 36-V, 3-A synchronous step-down regulator. This device is designed for ease of use and is suitable for various industrial applications requiring power conditioning from unregulated sources. It operates with a wide input range from 4 V to 36 V and delivers up to 3 A of continuous output current. The LMR23630 features integrated synchronous rectification, current-mode control, and internal compensation, which simplifies the design process and minimizes the need for external components. The regulator is available in both 8-pin HSOIC and 12-pin WSON packages with PowerPAD™ for enhanced thermal performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4 to 36 | V |
| Continuous Output Current | 3 | A |
| Switching Frequency | 400 kHz (fixed), adjustable up to 2.2 MHz | kHz |
| Minimum Switch On-time | 60 ns | ns |
| Quiescent Current (PFM mode) | 75 μA | μA |
| Shutdown Current | 2 μA | μA |
| Thermal Shutdown Threshold | 162 to 178 °C | °C |
| Package Options | 8-pin HSOIC, 12-pin WSON with PowerPAD™ |
Key Features
- Integrated synchronous rectification for high efficiency
- Current-mode control with peak-current-mode control for simple loop compensation and cycle-by-cycle current limiting
- Internal compensation for ease of use and minimal external components
- PFM and forced PWM mode options for high efficiency at light loads and low output voltage ripple
- Frequency synchronization to an external clock within the range of 200 kHz to 2.2 MHz
- Precision enable input for simplified regulator control and system power sequencing
- Protection features including thermal shutdown, VIN and VCC undervoltage lockout, cycle-by-cycle current limit, and hiccup-mode short-circuit protection
- Soft start into a prebiased load and high duty-cycle operation supported
- Compact package options with PowerPAD™ for improved thermal performance
Applications
- Factory and building automation systems: PLC CPU, HVAC control, elevator control
- Asset tracking
- General purpose wide VIN regulation
Q & A
- What is the input voltage range of the LMR23630?
The input voltage range is from 4 V to 36 V.
- What is the maximum continuous output current of the LMR23630?
The maximum continuous output current is 3 A.
- What are the package options available for the LMR23630?
The device is available in 8-pin HSOIC and 12-pin WSON packages with PowerPAD™.
- What are the switching frequency options for the LMR23630?
The switching frequency is 400 kHz for the fixed-frequency version and is adjustable up to 2.2 MHz.
- Does the LMR23630 have built-in protection features?
Yes, it includes thermal shutdown, VIN and VCC undervoltage lockout, cycle-by-cycle current limit, and hiccup-mode short-circuit protection.
- How does the LMR23630 manage efficiency at light loads?
The device operates in PFM mode at light loads to maintain high efficiency or in FPWM mode for low output voltage ripple and constant switching frequency.
- Can the LMR23630 be synchronized to an external clock?
Yes, it can be synchronized to an external clock within the range of 200 kHz to 2.2 MHz.
- What is the quiescent current in PFM mode?
The quiescent current in PFM mode is 75 μA.
- Does the LMR23630 support soft start into a prebiased load?
Yes, it supports soft start into a prebiased load.
- What are some typical applications of the LMR23630?
Typical applications include factory and building automation systems, asset tracking, and general purpose wide VIN regulation.
