TPS543XX

Part: Texas Instruments TPS54302, TPS54308

Type: Synchronous Buck Converter

Description: Texas Instruments TPS54302/TPS54308 are 4.5–28 V input, 3 A synchronous buck converters with integrated high-side and low-side MOSFETs, offering adjustable switching frequency and a wide output voltage range.

Operating Conditions:

• Supply voltage: 4.5–28 V
• Operating temperature: –40 to +150 °C (Junction)
• Output voltage range: 0.8 V to 27 V
• Switching frequency: 200 kHz to 2 MHz (adjustable)

Absolute Maximum Ratings:

• Max supply voltage: 30 V
• Max continuous current: 3 A
• Max junction/storage temperature: 150 °C

Key Specs:

• Input Voltage Range (VIN): 4.5 V to 28 V
• Output Current (IOUT): 3 A (Typ)
• Switching Frequency (fSW): 200 kHz to 2 MHz (adjustable, RT = 100 kΩ)
• High-Side MOSFET On-Resistance: 70 mΩ (Typ, IOUT = 1 A)
• Low-Side MOSFET On-Resistance: 40 mΩ (Typ, IOUT = 1 A)
• Reference Voltage (VFB): 0.8 V (Typ, TJ = 25 °C)
• Quiescent Current (IQ): 100 µA (Typ, VFB = 0.8 V, No switching)
• Efficiency: 92% (Typ, VIN = 12 V, VOUT = 3.3 V, IOUT = 3 A)

Features:

• Integrated 70-mΩ/40-mΩ MOSFETs
• 3-A continuous output current
• 4.5-V to 28-V input voltage range
• Output voltage range: 0.8 V to 27 V
• Adjustable switching frequency from 200 kHz to 2 MHz
• Internal soft start
• Cycle-by-cycle current limit
• Overcurrent protection, thermal shutdown

Applications:

• Industrial power systems
• Consumer electronics
• Distributed power systems
• Battery-powered equipment

Package:

• SOT-23-6