Overview
The LM2734XMK/NOPB is a high-frequency, PWM step-down DC/DC converter produced by Texas Instruments. This monolithic regulator is packaged in a 6-pin Thin SOT-23 (DDC) package, making it ideal for applications requiring minimal board space. The device supports input voltages from 3 V to 20 V and can output voltages ranging from 0.8 V to 18 V, with a maximum output current of 1 A. It features internal compensation, current-mode control, and a high switching frequency, allowing for efficient operation with small surface-mount components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 V to 20 V | V |
| Output Voltage Range | 0.8 V to 18 V | V |
| Output Current | 1 A | A |
| Switching Frequencies | 550 kHz (LM2734Y), 1.6 MHz (LM2734X) | Hz |
| Switch ON Resistance | 300 mΩ | mΩ |
| Shutdown Current | 30 nA | nA |
| Internal Voltage Reference | 0.8 V, 2% accuracy | V |
| Thermal Shutdown Temperature | 165°C | °C |
| Package Type | SOT-23-THN (DDC), 6 pins | |
| Operating Temperature Range | -40°C to 125°C | °C |
Key Features
- Thin SOT-23 package for minimal board space
- High switching frequencies (550 kHz and 1.6 MHz) for small component sizes
- Internal compensation and current-mode control for high-performance regulation
- Internal soft-start circuitry to reduce inrush current
- Pulse-by-pulse current limit and thermal shutdown for protection
- Output overvoltage protection
- Ultra-low shutdown current of 30 nA
- Efficiencies up to 90%
Applications
- Local point-of-load regulation
- Core power in hard disk drives (HDDs)
- Set-top boxes
- Battery-powered devices
- USB-powered devices
- DSL modems
- Notebook computers
Q & A
- What is the input voltage range of the LM2734XMK/NOPB?
The input voltage range is from 3 V to 20 V.
- What are the available switching frequencies for the LM2734XMK/NOPB?
The switching frequencies are 550 kHz (LM2734Y) and 1.6 MHz (LM2734X).
- What is the maximum output current of the LM2734XMK/NOPB?
The maximum output current is 1 A.
- What is the package type of the LM2734XMK/NOPB?
The package type is SOT-23-THN (DDC) with 6 pins.
- What is the thermal shutdown temperature of the LM2734XMK/NOPB?
The thermal shutdown temperature is 165°C.
- Does the LM2734XMK/NOPB have internal compensation?
Yes, it has internal compensation.
- What is the shutdown current of the LM2734XMK/NOPB?
The shutdown current is 30 nA.
- What protection features does the LM2734XMK/NOPB include?
The device includes output overvoltage protection, pulse-by-pulse current limit, and thermal shutdown.
- What are some typical applications of the LM2734XMK/NOPB?
Typical applications include local point-of-load regulation, core power in HDDs, set-top boxes, battery-powered devices, USB-powered devices, DSL modems, and notebook computers.
- How does the LM2734XMK/NOPB achieve high efficiency?
The device achieves high efficiency through its high switching frequencies and internal compensation, allowing for efficiencies up to 90%.
