Overview
The LMR62421XSDE/NOPB, produced by Texas Instruments, is a highly efficient and compact step-up voltage regulator. This device is part of the SIMPLE SWITCHER® family and is designed to provide local DC/DC conversion with fast transient response and accurate regulation. It is ideal for boost and SEPIC DC-DC regulation, making it suitable for a variety of applications where space efficiency and high performance are critical.
The regulator operates within an input voltage range of 2.7V to 5.5V and can deliver an output voltage up to 24V with a switch current of up to 2.1A. Its internal switching frequency is set at 1.6 MHz, allowing the use of small surface mount components while achieving efficiencies near 90%.
Key Specifications
| Parameter | Min | Max | Units | |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | 5.5 | V | |
| Output Voltage | 24 | V | ||
| Switch Current | 2.1 | A | ||
| Switching Frequency | 1.6 | MHz | ||
| Shutdown Iq | 80 | nA | ||
| Current Limiting | Cycle-by-Cycle | |||
| Thermal Shutdown Temperature | 160 | °C | ||
| Storage Temperature Range | -65 | 150 | °C |
Key Features
- Space-efficient design in SOT-23 and WSON packages
- Input voltage range of 2.7V to 5.5V
- Output voltage up to 24V
- Switch current up to 2.1A
- Internally set switching frequency of 1.6 MHz
- Low shutdown quiescent current of 80 nA
- Cycle-by-cycle current limiting for protection
- Internally compensated for simplicity
- Support for ceramic output capacitors without compromising transient response
- Constant frequency peak current mode control for stable operation
Applications
The LMR62421XSDE/NOPB is suitable for various applications requiring efficient and compact DC-DC conversion. These include:
- Boost and SEPIC DC-DC regulation
- Portable electronics and battery-powered devices
- Industrial control systems and automation
- Medical devices requiring high efficiency and reliability
- Aerospace and defense applications where size and efficiency are critical
Q & A
- What is the input voltage range of the LMR62421XSDE/NOPB?
The input voltage range is from 2.7V to 5.5V.
- What is the maximum output voltage that the LMR62421XSDE/NOPB can deliver?
The maximum output voltage is up to 24V.
- What is the switching frequency of the LMR62421XSDE/NOPB?
The switching frequency is internally set at 1.6 MHz.
- How does the LMR62421XSDE/NOPB protect against overcurrent?
The device uses cycle-by-cycle current limiting to protect the internal NMOS switch.
- What is the shutdown quiescent current of the LMR62421XSDE/NOPB?
The shutdown quiescent current is typically 80 nA.
- Can the LMR62421XSDE/NOPB be used with ceramic output capacitors?
- What is the thermal shutdown temperature of the LMR62421XSDE/NOPB?
The thermal shutdown temperature is 160°C.
- How do I set the output voltage of the LMR62421XSDE/NOPB?
The output voltage is set by connecting the FB pin to an external resistor divider.
- What is the purpose of the Enable (EN) pin on the LMR62421XSDE/NOPB?
The Enable pin controls the shutdown mode; a logic low voltage disables the device.
- What type of control mode does the LMR62421XSDE/NOPB use?
The device uses constant frequency peak current mode control.
