Overview
The LM2703MF-ADJ/NOPB is a micropower step-up DC/DC converter produced by Texas Instruments. It is packaged in a small 5-lead SOT-23 package, making it ideal for space-conscious portable applications. The device features a current limited, fixed off-time control scheme that conserves operating current, resulting in high efficiency over a wide range of load conditions. The LM2703 can generate output voltages as high as 21V from an input voltage range of 2.2V to 7V, and it includes an internal 350mA, 0.7Ω switch. This converter is particularly suited for applications requiring low current and high efficiency, such as LCD panels and white LED backlighting in cellular phones.
Key Specifications
| Topology | Boost |
|---|---|
| Vin (min) (V) | 2.2 |
| Vin (max) (V) | 7 |
| Vout (min) (V) | 1.24 |
| Vout (max) (V) | 21 |
| Switch current limit (typ) (A) | 0.35 |
| Switching frequency (min) (kHz) | 600 |
| Switching frequency (max) (kHz) | 2500 |
| Iq (typ) (mA) | 0.235 |
| Features | Enable, Nonsynchronous rectification |
| Duty cycle (max) (%) | 76 |
| Operating temperature range (°C) | -40 to 85 |
| Package Type | SOT-23 (DBV)-5 |
| Pin Count | 5 |
| Output Type | Adjustable |
| Maximum Output Current | 350mA |
| Dimensions | 2.92 x 1.6 x 1.02mm |
Key Features
- 350mA, 0.7Ω internal switch
- Uses small surface mount components
- Adjustable output voltage up to 21V
- Input voltage range: 2.2V to 7V
- Input undervoltage lockout
- 0.01µA shutdown current
- Small 5-lead SOT-23 package
Applications
The LM2703MF-ADJ/NOPB is ideal for various applications that require low current and high efficiency. These include:
- LCD panels requiring efficient power conversion
- White LED backlighting in cellular phones and other portable devices
- Space-conscious portable applications where small footprint and low profile components are essential
Q & A
- What is the package type of the LM2703MF-ADJ/NOPB?
The LM2703MF-ADJ/NOPB is packaged in a 5-lead SOT-23 package.
- What is the input voltage range of the LM2703MF-ADJ/NOPB?
The input voltage range is from 2.2V to 7V.
- What is the maximum output voltage of the LM2703MF-ADJ/NOPB?
The maximum output voltage is up to 21V.
- What is the maximum output current of the LM2703MF-ADJ/NOPB?
The maximum output current is 350mA.
- What are the typical applications of the LM2703MF-ADJ/NOPB?
Typical applications include LCD panels, white LED backlighting in cellular phones, and other space-conscious portable devices.
- How does the LM2703MF-ADJ/NOPB conserve operating current?
The device uses a current limited, fixed off-time control scheme to conserve operating current.
- What is the shutdown current of the LM2703MF-ADJ/NOPB?
The shutdown current is 0.01µA.
- What is the operating temperature range of the LM2703MF-ADJ/NOPB?
The operating temperature range is from -40°C to 85°C.
- How many white LEDs can the LM2703MF-ADJ/NOPB drive from a single Li-Ion battery?
The LM2703MF-ADJ/NOPB can drive up to 4 white LEDs from a single Li-Ion battery.
- What is the switching frequency range of the LM2703MF-ADJ/NOPB?
The switching frequency range is from 600 kHz to 2500 kHz.
