NEW Dual Controller buck VOLTAGE CONTROLLER Linear Voltage MAXIM COMPANY FOR LAPTOPS
Maxim Integrated Products is a double Controllers MAX1816/MAX1994 step-down voltage regulators for use in laptops. Controllers contain a voltage regulator (BUCK1) central processing unit (CPU) that has a dynamic adjustment of the output voltage, high-speed transient response, high precision DC and high efficiency needed to supply the latest CPUs. The second step-down regulator (BUCK2) is designed to produce memory voltage and logic input-output ports. Both have the stabilizer control architecture Quick-PWM of Maxim.
This fast PWM controller with a small reaction time allows adjustment of the output voltage over a wide range and has a response time less than 100 ns during load changes. MAX1816/MAX1994 also have a linear regulator controller to power 1.2 V 500 mA CPU family VID.
Voltage regulator CPU supports the active voltage control to reduce capacitive loading terminals and reduce the power dissipation in the load increases. BUCK1 connected to the output of the amplifier with programmable gain amplifiers (PGA) with differential inputs CS1 + and CS1-, which allows you as a current sensor to use a low-resistance resistor. PGA may have a gain of 0, 1.5, 2, or 4.
MAX1816/MAX1994 contain a differential remote sense amplifier, which allows for more accurate measurement of current consumption of the load. Devices also provide specialized digital interface, which makes them compatible with mobile CPU and video processor. On the PGOOD pin for switching VID is present is necessary for operation of the main stabilizer high level, and on the PGOOD output signal is delayed by 1 ms, which is necessary to stabilize the system CPU PLL.
Overvoltage protection (OVP) is present on the findings BUCK1, BUCK2 and output linear regulator. Threshold of protection against over-voltage on the output can be set BUCK1 external resistive divider, while the thresholds of protection at outputs BUCK2 and linear regulator mounted rigidly.
MAX1816 voltage adjustment range is from 0.6 V to 1.75 V. Likewise MAX1994 regulates the voltage in the range of 0.925 V to 2 V in accordance with the code value VID. But in the mode of slow adjustment range for both devices, ranging from 0.7 V to 1.075 V.
Devices MAX1816/MAX1994 are available in 48 pin QFN packages and have a working temperature range from -40 ° C to +100 ° C. To facilitate the development, you can use the released software development kit and a recommended list of items.
Irina Cheremkhin
http://www.rtcs.ru
