Buck-Boost Module Operates With High Efficiency

Linear Technology’s LTM4607, the latest member of its μModule family of dc-dc converters, uses a four-switch synchronous MOSFET design to achieve up to 92% efficiency in boost mode (V_IN: 5 V, V_OUT: 16 V, I_OUT: 2.5 A), and up to 97.7% efficiency in buck mode (V_IN: 32 V, V_OUT: 20 V, I_OUT: 8 A). The device operates from a V_IN range of 4.5 Vdc to 36 Vdc, regulates V_OUT from 0.8 Vdc to 24 Vdc, and delivers output power up to 190 W. To reduce undesirable frequency harmonics, the converter is also phase-lockable to an external clock frequency ranging from 200 kHz to 400 kHz.

The LTM4607 integrates a synchronous buck-boost dc-dc controller, four n-channel MOSFETs, input and output bypass capacitors, and all compensation circuitry. It is available in a 15-mm x 15-mm x 2.8-mm LGA plastic molded package. Pricing for 1000 pieces starts at $21.55.