JAJSMU5B may 2023 – july 2023 TPSM843B22
PRODUCTION DATA
The TPSM843B22 is a 20-A, high-performance, synchronous buck module with two integrated N-channel MOSFETs, inductor, and several passives. The TPSM843B22 has a maximum operating junction temperature of 125°C, making it designed for high-ambient temperature applications such as wireless infrastructure, wired optical modules and test and measurement applications. The input voltage range is 4 V to 18 V and the output voltage range is 0.5 V to 7 V. The module features a fixed-frequency advanced current mode (ACM) control architecture with five switching frequency selection settings ranging from 500 kHz to 2.2 MHz, allowing for efficiency and size optimization when selecting output filter components. The switching frequency of the device can be synchronized to an external clock applied to the FSEL/SYNC pin.
Advanced current mode is an emulated peak current-mode control topology, supporting stable static and transient operation without the requirement for a complex external compensation design. ACM includes an internal ramp generation network that emulates inductor current information, enabling the use of low-ESR output capacitors such as multi-layered ceramic capacitors (MLCC). The internal ramp also creates a high signal-to-noise ratio for good noise immunity. The TPSM843B22 has three ramp options to optimize the internal feedback loop for various inductor and output capacitor combinations with only a single resistor to AGND (see Section 7.3.7.2 for details). The TPSM843B22 is easy to use and allows low external component count with fast load transient response. Fixed-frequency modulation also provides ease-of-filter design to overcome EMI noise.