Overview
The LM4510SD, produced by Texas Instruments (formerly National Semiconductor), is a peak current-mode, fixed-frequency PWM boost regulator. This device is designed to deliver high efficiency and reliability in various power supply applications. It operates within a wide input voltage range of 2.7 V to 5.5 V and can output up to 16 V. The LM4510SD features synchronous and non-synchronous switching modes to maximize power efficiency, especially under heavy and light load conditions. The device is packaged in a low-profile 10-pin WSON package, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | 5.5 | V | |
| Switching Frequency | 0.85 | 1 | 1.2 | MHz |
| Maximum Output Current | 120 | mA | ||
| Peak Efficiency | 85% | % | ||
| Shutdown Current | 0.002 | µA | ||
| Thermal Shutdown Temperature | 150 | °C | ||
| Junction-to-Ambient Thermal Resistance | 36 | °C/W |
Key Features
- No external Schottky diode required
- Synchronous switching operation at heavy load and non-synchronous at light load for maximum efficiency
- True shutdown isolation with synchronous FET and related circuitry
- Programmable soft-start circuit to limit inrush current during start-up
- Output short-circuit protection and feedback fault protection
- Input undervoltage lockout with hysteresis
- Thermal shutdown protection
- Stable operation with small ceramic or tantalum output capacitors
- Low-profile 10-pin WSON package (3 mm x 3 mm x 0.8 mm)
Applications
- Organic LED panel power supply
- Charging holster
- White LED backlight
- USB power supply
- Class D audio amplifier
- Camera flash LED driver
Q & A
- What is the input voltage range of the LM4510SD?
The input voltage range is from 2.7 V to 5.5 V.
- What is the maximum output current of the LM4510SD?
The maximum output current is up to 120 mA at 16 V.
- Does the LM4510SD require an external Schottky diode?
No, the LM4510SD does not require an external Schottky diode.
- What is the switching frequency of the LM4510SD?
The switching frequency is fixed at 1 MHz.
- How does the LM4510SD handle thermal protection?
The device features thermal shutdown protection that activates if the die temperature exceeds 150°C.
- What kind of package does the LM4510SD come in?
The LM4510SD is packaged in a low-profile 10-pin WSON package (3 mm x 3 mm x 0.8 mm).
- Does the LM4510SD have built-in short-circuit protection?
- How does the LM4510SD handle feedback fault protection?
The device features feedback fault protection that monitors VOUT and shuts down the device if the feedback network is not properly connected or if VOUT reaches a protection level.
- What is the purpose of the soft-start pin on the LM4510SD?
The soft-start pin allows the user to limit the amount of inrush current during start-up.
- Is the LM4510SD RoHS compliant?
