Overview
The LM2735XMYX/NOPB from Texas Instruments is a highly efficient and space-efficient boost and SEPIC DC/DC regulator. This device is designed to provide regulated DC output with fast transient response and is ideal for applications requiring minimal board space. The LM2735 operates with an input voltage range of 2.7 V to 5.5 V and can produce output voltages from 3 V to 24 V. It features a peak switch current of 2.1 A and is available in various packages, including SOT-23, WSON, and MSOP-PowerPAD.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 5.5 | V |
| Output Voltage Range | 3 | - | 24 | V |
| Switch Current | - | 2.1 | - | A |
| Switching Frequency (LM2735-X) | 1200 | 1600 | 2000 | kHz |
| Switching Frequency (LM2735-Y) | 360 | 520 | 680 | kHz |
| Feedback Voltage Accuracy | - | ±2% | - | % |
| Switch ON-Resistance (SOT-23 and MSOP-PowerPAD) | 170 | - | 330 | mΩ |
| Switch ON-Resistance (WSON) | 190 | - | 350 | mΩ |
| Quiescent Current (Switching, LM2735-X) | 7 | - | 11 | mA |
| Quiescent Current (Switching, LM2735-Y) | 3.4 | - | 7 | mA |
| Quiescent Current (Shutdown) | - | 80 | - | nA |
| Undervoltage Lockout (VIN Rising) | - | 2.3 | - | V |
Key Features
- Current-mode control with internal compensation for ease of use and minimal external components.
- High switching frequencies of 520 kHz or 1.6 MHz, allowing the use of small surface mount inductors and chip capacitors.
- Logic high enable pin for easy control.
- Ultra-low standby current of 80 nA in shutdown mode, ideal for portable applications.
- Internal soft start to reduce inrush current.
- Pulse-by-pulse current limit and thermal shutdown for protection.
- Available in compact packages: SOT-23, WSON, and MSOP-PowerPAD.
- Efficiencies of up to 90%.
Applications
- LCD display backlighting for portable applications.
- OLED panel power supply.
- USB-powered devices.
- Digital still and video cameras.
- White LED current source.
Q & A
- What is the input voltage range of the LM2735XMYX/NOPB?
The input voltage range is from 2.7 V to 5.5 V.
- What are the available switching frequencies for the LM2735?
The LM2735 is available with switching frequencies of 520 kHz (LM2735-Y) and 1.6 MHz (LM2735-X).
- What is the peak switch current of the LM2735?
The peak switch current is 2.1 A.
- What is the feedback voltage accuracy of the LM2735?
The feedback voltage accuracy is ±2%.
- What are the package options for the LM2735?
The LM2735 is available in SOT-23, WSON, and MSOP-PowerPAD packages.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is 80 nA.
- Does the LM2735 have internal compensation?
Yes, the LM2735 has internal compensation.
- What are some typical applications for the LM2735?
Typical applications include LCD display backlighting, OLED panel power supply, USB-powered devices, digital still and video cameras, and white LED current source.
- How does the LM2735 protect against overcurrent?
The LM2735 uses pulse-by-pulse current limiting to protect the internal NMOS switch.
- Does the LM2735 have thermal shutdown protection?
Yes, the LM2735 has thermal shutdown protection.
