TPS54308DDCT
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Input (Max) | 28V |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Current - Output | 3A |
| Supplier Device Package | SOT-23-THIN |
| Output Configuration | Positive |
| Function | Step-Down |
| Topology | Buck |
| Frequency - Switching | 350kHz |
| Synchronous Rectifier | Yes |
| Voltage - Output (Min/Fixed) | 1V |
| Voltage - Output (Max) | 26V |
| Voltage - Input (Min) | 4.5V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | TPS54308 |
| REACH Status | REACH Unaffected |
| Standard Package | 250 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
TPS54308DDCT step-down converter IC Positive Adjustable 1V 1 Output 3A
The TPS54308DDCT from Texas Instruments is a 28V, 3A synchronous step-down (buck) converter packaged in a compact 6-pin TSOT-23-6 Thin package. This high-efficiency device integrates both high-side (85 mΩ) and low-side (40 mΩ) N-channel MOSFETs, eliminating the need for external Schottky diodes. Designed for space-constrained power systems, it operates with a fixed 350 kHz switching frequency and employs peak current-mode control with internal loop compensation. The chip's forced continuous conduction mode (FCCM) maintains constant frequency across all load conditions, making it ideal for noise-sensitive applications .
The converter supports a wide input voltage range of 4.5V to 28V, with an adjustable output voltage from 1V down to 26V delivering up to 3A continuous current. Key specifications include a low 300 µA operating quiescent current and an ultra-low 2 µA shutdown current, preserving battery life in standby systems. Protection features are comprehensive: cycle-by-cycle current limiting on both MOSFETs, overvoltage protection (OVP) at 118% of nominal output, thermal shutdown with hiccup recovery, and a fixed 5 ms internal soft-start to minimize inrush currents. The converter also features an adjustable UVLO via the EN pin for precise power sequencing .
Alternative Buck Converter Chips
● Analog Devices LT8610ABEFE offers a wide 3.4V to 42V input range with 2.5A output and ultralow 2.5 µA quiescent current in a thermally enhanced TSSOP package
● Monolithic Power Systems MP28922DNU-LF-Z delivers 3A capability with forced CCM mode and integrated spread spectrum for EMI reduction
● Renesas (Intersil) ISL78222ARZ-T7A provides a 3.5A synchronous buck with 4.5V to 36V input range, AEC-Q100 qualified for automotive infotainment systems
● Maxim Integrated MAX17503 features a 4.5V to 60V wide-input range with 2.5A output and peak current-mode control in a compact TQFN package
