SC1406G 데이터 시트보기 (PDF) - Semtech Corporation
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SC1406G
Semtech Corporation
SC1406G Datasheet PDF : 28 Pages
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POWER MANAGEMENT
VOLTAGE CLAMP
This level translator converts an input voltage swing on the IO
rail, into a voltage swing on the CL or VCC rail depending on
where the open-drain output of the translator is tied to through
an external pull-up resistor. The level translator tracks the input
in phase, and switches in 5ns (typical) following an input
threshold intercept.
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Power on/off Sequence
SC1406G
PowerStep Solution Design Procedure
Introduction:
The SC1406G (PowerStep for SpeedStep) and SC1405 Smart Driver power chip set provides a flexible, high performance
power solution to the requirements of Intel® mobile SpeedStep processors.
The SC1406G is a control IC that integrates a synchronous step-down controller for VCORE and two low-dropout regulator (LDO)
controllers for VI/O, and VCLK. In addition, the SC1406G also has a low-battery detector and a clamp circuit. The SC1405 is a
Smart Driver IC with programmable dead time and industry-leading speed.
The synchronous step-down converter is a hysteretic type, where the output voltage is compared against a VID programmable
reference (VDAC) with a resistor programmable offset, VHYS. The basic operation of the converter is very simple: Referring to Figure 1,
with the voltage at the reference, QH is off, QL is on and the output filter (L and C) discharge into load R. When the output voltage
hits the lower hysteresis point, the switches reverse state, and the RLC network charges up to the upper hysteresis value.
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