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1. Description
The TPS54202DDCR is a 4.5-V to 28-V input voltage range, 2-A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation and 5-ms internal soft start to reduce component count. By integrating the MOSFETs and employing the SOT-23 package, the TPS54202 achieves the high power density and offers a small footprint on the PCB. Advanced Eco-mode implementation maximizes the light load efficiency and reduces the power loss. The frequency spread spectrum operation is introduced for EMI reduction. Cycle-by-cycle current limit in both high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. Hiccup mode protection is triggered if the overcurrent condition has persisted for longer than the present time
2. Features
1. 4.5-V to 28-V wide input voltage range
2. Integrated 148-mΩ and 78-mΩ MOSFETs for 2-A,continuous output current
3. Low 2-μA shutdown, 45-μA quiescent current
4. Internal 5-mS soft start
5. Fixed 500-kHz switching frequency
6. Frequency spread spectrum to reduce EMI
7. Advanced Eco-mode™ pulse skip
8. Peak current mode control
9. Internal loop compensation
10. Overcurrent protection for both MOSFETs with hiccup mode protection
11. Overvoltage protection
12. Thermal shutdown
13. SOT-23 (6) package
3. Applications
1. 12-V, 24-V distributed power-bus supply
2. Industry application
– White goods
3. Consumer application
– Audio
– STB, DTV
– Printer
4. Pin Configuration
5. Pin Functions
