CMOS High Efficiency On-chip Power Management (Analog by John Hu

By John Hu

This booklet will introduce numerous energy administration built-in circuits (IC) layout suggestions to construct destiny energy-efficient “green” electronics. The target is to accomplish excessive potency, that is necessary to meet shoppers’ starting to be want for longer battery lives. the point of interest is to check topologies amiable for complete on-chip implementation (few exterior parts) within the mainstream CMOS know-how, to be able to decrease the actual dimension and the producing fee of the units.

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25 V LDO to reduce power consumption. 4 GHz low power wireless SoC from Texas Instruments (TIC 2009). Unlike Fig. 8 V LDO for simplicity. 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.

4 applications. com/192701026 References 31 Burd T, Pering T, Stratakos A, Brodersen R (2000) A dynamic voltage scaled microprocessor system. 881202 Carlson B, Giolma B (2008) Ti white paper: Smartreflex power and performance management technologies: reduced power consumption, optimized performance. pdf Hattori T, lrita T, Ito M, Yamamoto E, Kato H, Sado G, Yamada Y, Nishiyama K, Yagi H, Koike T, Tsuchihashi Y, Higashida M, Asano H, Hayashibara I, Tatezawa K, Shimazaki Y, Morino N, Hirose K, Tamaki S, Yoshioka S, Tsuchihashi R, Arai N, Akiyama T, Ohno K (2006) A power management scheme controlling 20 power domains for a single-chip mobile processor.

As a result, methods that introduce a zero without relying on external ESR have been invented. A bypass capacitance can be inserted in parallel with the resistive feedback network, as seen in Fig. 13. Strictly speaking, this method introduces both a zero and a pole. But the zero is located before the pole such that a net phase boost can be reaped from the configuration. 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.

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