Microchip’s MIC24045/MIC24046 series of I²C-programmable, high-efficiency step-down regulators are perfectly suited for multi-voltage rail applications that are typically found in computing and telecommunication systems. These regulators have a wide input range and are rated up to 5 A. Several parameters can be programmed into the MIC24045 device via I2C such as output voltage, switching frequency, soft-start slope, margining, current limit values and start-up delays. The wide switching frequency adjustment range, valley-current mode control technique, high-performance error amplifier, and external compensation help manage system trade-offs to optimize high efficiency performance and at the same time providing the smallest possible solution size.
Extensive diagnostics and status information via the I²C interface are supported in the MIC24045 as well. The MIC24045 pin-out is compatible with the MIC24046 pin-strapping programmable regulator pin-out, such that I2C-based implementations can be easily converted into pin-programmable ones. The MIC24045 is available in thermally-efficient, space-saving 20-pin 3 mm x 3 mm FQFN package with an operating junction temperature range from -40°C to +125°C.
| Features |
- 4.5 V to 19 V input voltage range
- 5 A (max) output current
- I²C programmable output voltage: (MIC24045 only)
- 0.64 V to 5.25 V in 5 mV, 10 mV, 30 mV, and 50 mV steps
- High efficiency >95% - (MIC24045)
- High efficiency >90% - (MIC24046)
- ±1% output voltage accuracy
- Supports safe start-up with pre-biased output
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- I²C programmability of
- Soft-start: 0.16, 0.38, 0.76, and 1.5 V/ms ramp rates
- Switching frequency: 310 kHz, 400 kHz, 500 kHz, 570 kHz, 660 kHz, 780 kHz, 1 MHz, 1.2 MHz
- Current limits for 2 A, 3 A, 4 A, and 5 A loads
- Internal soft-start and thermal shutdown protection
- Hiccup-mode short-circuit protection
- Available in a 20-pin 3 mm x 3 mm QFN package
- -40°C to +125°C junction temperature range
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Microchip’s MIC24045/MIC24046 series of I²C-programmable, high-efficiency step-down regulators are perfectly suited for multi-voltage rail applications that are typically found in computing and telecommunication systems. These regulators have a wide input range and are rated up to 5 A. Several parameters can be programmed into the MIC24045 device via I2C such as output voltage, switching frequency, soft-start slope, margining, current limit values and start-up delays. The wide switching frequency adjustment range, valley-current mode control technique, high-performance error amplifier, and external compensation help manage system trade-offs to optimize high efficiency performance and at the same time providing the smallest possible solution size.
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