Packaging information
| Package | Pins VQFN-HR (RNV) | 18 |
| Operating temperature range (°C) -40 to 150 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the TPS54424
- Small 3.5-mm × 3.5-mm HotRod™ QFN Package
- Integrated 14.1-mΩ and 6.1-mΩ MOSFETs
- Peak Current Mode Control With Fast Transient Response
- 200-kHz to 1.6-MHz Fixed Switching Frequency
- Synchronizes to External Clock
- 0.6-V Voltage Reference ±0.85% Over Temperature
- 0.6-V to 12-V Output Voltage Range
- Hiccup Current Limit
- Safe Start-Up into Pre-Biased Output Voltage
- Adjustable Soft Start and Power Sequencing
- Adjustable Input Undervoltage Lockout
- 3-µA Shutdown Current
- Power Good Output Monitor for Undervoltage and Overvoltage
- Output Overvoltage Protection
- Non-latch Thermal Shutdown Protection
- –40°C to 150°C Operating Junction Temperature
- Create a Custom Design Using the TPS54424 With the WEBENCH® Power Designer
Description for the TPS54424
The TPS54424 is a full-featured 17-V (19-V maximum), 4-A synchronous step-down DC/DC converter in a 3.5 mm × 3.5 mm HotRod™ QFN package.
The device is optimized for small solution size through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through peak current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor footprint.
The peak current mode control simplifies the loop compensation and provides fast transient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcing current limit protects the device in overload situations. Hiccup limits MOSFET power dissipation if a short circuit or over loading fault persists.
A power good supervisor circuit monitors the regulator output. The PGOOD pin is an open-drain output and goes high impedance when the output voltage is in regulation. An internal deglitch time prevents the PGOOD pin from pulling low unless a fault has occurred.
A dedicated EN pin can be used to control the regulator on/off and adjust the input undervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, which allows operation as either a standalone power supply or in tracking situations.