By John Hu
This publication will introduce a variety of energy administration built-in circuits (IC) layout recommendations to construct destiny energy-efficient “green” electronics. The aim is to accomplish excessive potency, that is necessary to meet shoppers’ becoming desire for longer battery lives. the focal point is to review topologies amiable for complete on-chip implementation (few exterior elements) within the mainstream CMOS know-how, with a purpose to lessen the actual measurement and the producing rate of the units.
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Additional info for CMOS High Efficiency On-chip Power Management (Analog Circuits and Signal Processing)
2 LDO Performance and Design Challenges 53 Vin VBG Vin AEA APT VBG APT AEA Vout Vout VFB VFB R1 R1 C1 R2 R2 Design of Ricon−Mora98JSSC Commonly used high freq bypass (phase lead) Vin VBG APT AEA Vout VFB R1 R2 C1 on−chip zero generation Design of Chava03TCAS−I and Lin08TCAS−II Fig. 14 Frequency compensation methods of a PMOS LDO Since the zero comes before the pole but they are closely located, the phase boost from the structure is limited. 25) Another method is to create an on-chip zero using active circuitry.
Notice that all sub-blocks can be disconnected from the supply rail during sleep mode to save on leakage, and the LDO can be by passed for direct battery operation. 26 2 System Power Management b Sleep mode Bypassed a DC/DC LDO LDO Load#1 LDO LDO Load#2 LDO LDO Load#2 Load#3 Load#3 Load#1 STMicro: STM32x c Freescale: MC1322x d Available in All modes LDO Load#1 Load#2 LDO LDO Load#2 Load#3 Load#3 Load#1 TI: CC253x DC/DC Proposed Fig. 7 Configuration of the sleep mode power chain: existing solutions and proposed.
Assume that a feedback linear system can be divided into a basic amplifier (A) and a feedback network (B). 1 Introduction 39 configurations: series-series, shunt-series, series-shunt, and shunt-shunt. Since RS needs to be kept at a minimum, only series-shunt and shunt-shunt configurations should be considered, as they reduce the output impedance of the original network by the feedback loop gain. 1) 1 + AB The same conclusion can also be drawn by inspecting the essence of regulation. The output voltage, not current, is the parameter that needs to be stabilized against variations.