Overview
The LM76005RNPR, produced by Texas Instruments, is a 3.5-V to 60-V, 5-A synchronous step-down DC-DC converter. This device is designed for rugged industrial applications and is capable of driving up to 5 A of load current. It features a small solution size and exceptional efficiency and thermal performance, making it ideal for a wide range of end equipment. The LM76005 employs fixed-frequency peak-current-mode control with configurable discontinuous conduction mode (DCM) and pulse frequency modulation (PFM) mode at light loads to achieve high efficiency across the load range. It also supports synchronization to an external clock and has adjustable frequency and soft-start capabilities.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (PVIN to PGND) | 3.5 | - | 60 | V |
| Output Voltage (VOUT) | 1 | - | 95% of VIN | V |
| Output Current (IOUT) | 0 | - | 5 | A |
| Switching Frequency (FSW) | 200 | - | 500 | kHz |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Quiescent Current (IQ_SW) | - | 15 | - | µA |
| Efficiency at 400 kHz (12VIN, 5VOUT, 2A) | - | 95% | - | % |
Key Features
- Functional Safety-Capable with documentation available to aid functional safety system design.
- Designed for rugged industrial applications with input transient protection up to 65 V.
- Optimized for low EMI requirements and pin-selectable FPWM operation.
- Adjustable frequency range from 200 kHz to 500 kHz and synchronization to an external clock.
- Start-up with pre-biased output voltage and adjustable soft-start (6.3 ms default).
- Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection.
- Low power dissipation with 15-µA quiescent current in regulation and high efficiency across the load spectrum.
- External bias option for improved efficiency.
- Pin compatible with LM76002/3 (60 V, 2.5 A or 3.5 A).
Applications
- Industrial PC and Programmable Logic Controllers (PLCs).
- Asset tracking and fleet management systems.
- Personal transport vehicles such as electric bikes.
- Video surveillance: IP network cameras.
- Motor drives.
Q & A
- What is the input voltage range of the LM76005?
The input voltage range is from 3.5 V to 60 V.
- What is the maximum output current of the LM76005?
The maximum output current is 5 A.
- What are the switching frequency options for the LM76005?
The switching frequency can be adjusted from 200 kHz to 500 kHz.
- Does the LM76005 support synchronization to an external clock?
Yes, it supports synchronization to an external clock within the 200-kHz to 500-kHz frequency range.
- What are the key protection features of the LM76005?
The key protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection.
- How does the LM76005 manage efficiency at light loads?
The device employs pulse frequency modulation (PFM) mode at light loads to achieve high efficiency.
- What is the typical quiescent current of the LM76005 in regulation?
The typical quiescent current is 15 µA.
- Is the LM76005 suitable for industrial applications?
Yes, it is designed for rugged industrial applications with input transient protection up to 65 V.
- Can the LM76005 be used in safety-critical applications?
Yes, it is functional safety-capable with available documentation to aid in functional safety system design.
- What package type is the LM76005 available in?
The LM76005 is available in a 30-pin WQFN leadless package.
