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.
| BD9G101G | BD9G341AEFJ | BD9G201EFJ | BD9G401EFJ | BD9G500EFJ | |
| 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 |