This document describes the features and characteristics of Analog Devices' ADP1870/ADP1871 products, including power supply input voltage range, minimum output voltage, precision reference voltage source, frequency selection, power saving mode, thermal overload protection, short circuit protection, etc. The product is suitable for applications such as telecommunications and network systems, servers, set-top boxes, DSP core power supplies, etc.
The ADP1870 and ADP1871 are versatile current-mode synchronous buck controllers featuring constant on-time, pseudo-fixed frequency, and programmable current limit. They utilize a valley current mode control architecture to achieve optimal performance at low duty cycles and can drive all N-channel MOSFETs to regulate output voltages as low as 0.6V.
| Input Voltage Range | 2.95 V to 20 V |
|---|---|
| Output Voltage | 0.6 V to 5.5 V |
| Switching Frequencies | 300 kHz, 600 kHz, 1.0 MHz |
| Operating Junction Temperature | -40°C to +125°C |
| Package Types | 10-pin MSOP and LFCSP |
| Thermal Resistance (MSOP, 2-layer) | 213.1°C/W |
The device can regulate output voltages as low as 0.6 V.
The controllers are designed to drive all N-channel power stage MOSFETs.
Three frequency options are available: 300 kHz, 600 kHz, and 1.0 MHz.