Step-down switching regulator ICs operate over a wide input-voltage range

The ROHM BD9G buck regulators, which feature an integrated MOSFET, have a high fixed switching frequency, so the power-system designer can save space through the use of smaller magnetic components.

The BD9G family from ROHM Semiconductor is a series of switching buck regulator ICs with integrated power MOSFET which operate over a wide input-voltage range, and which can supply an output as low as 0.8 V. 

Housed in a small, six-lead SOT-23 (SSOP) package, these non-synchronous regulators operate at high switching frequencies, enabling the use of a small inductor, and reducing system size. Phase compensation components are also built in. 

The BD9G family consists of five parts capable of supplying a load current of up to 5 A and operating from an input voltage as high as 76 V.

Input-voltage Range (V) 6 to 42 12 to 76 4.5 to 42 4.5 to 42 7 to 76
Output-voltage Range (V) 1 to 29.4 1 to 76 0.8 to 42 0.8 to 42 1 to 68.4
Maximum Output Current (A) 0.5 3 1.5 3.5 5
Maximum Switching Frequency (MHz) 1.7 0.75 0.5 0.5 0.65
Light-load Mode - - No No No
Operating- temperature Range (°C) -40 to 105 -40 to 85 -40 to 105 -40 to 105 -40 to 125
Buy now Datasheet Datasheet #2 Samples