|Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement|
|Huang, Mo; Lu, Yan; Lu, Xing
|Source Publication||ELECTRONICS LETTERS
|Abstract||A partial analogue-assisted (AA) digital low dropout regulator (D-LDO) with also a transient body-drive (BD) technique is proposed. The body of the power switches can be driven by the V-OUT transient spike that is high-pass coupled from the D-LDO output when a load step occurs, for a temporary threshold voltage change. The BD technique thereby manages to provide more than 10% momentary output current. In addition, since the effectiveness of the AA loop is proportional to the ratio of the coupling capacitance and the parasitic capacitance, here, only about 1/5 of the most significant bit of the power switches are connected to the AA and BD networks. Therefore, the coupling capacitors are much reduced, comparing to the previous work. A simulated 100 mV undershoot is obtained under a 2-to-12 mA load step within 1 ns edge time, using only 40 pF total capacitor. A 0.09 ps figure-of-merit (FOM) of speed is thereby achieved, which is at least 2.5x better than state-of-the-art works.|
power semiconductor switches
partial analogue-assisted digital low dropout regulator
transient body-drive technique
partial AA D-LDO
transient BD technique
temporary threshold voltage change
momentary output current
voltage 100 mV
current 2 mA to 12 mA
capacitance 40 pF
|URL||View the original
|WOS Research Area||Engineering
|WOS Subject||Engineering, Electrical & Electronic
|Publisher||INST ENGINEERING TECHNOLOGY-IET
|The Source to Article||WOS
|Document Type||Journal article
|Collection||University of Macau|
Huang, Mo,Lu, Yan,Lu, Xing. Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement[J]. ELECTRONICS LETTERS,2018,54(5):282-283.
Huang, Mo,Lu, Yan,&Lu, Xing.(2018).Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement.ELECTRONICS LETTERS,54(5),282-283.
Huang, Mo,et al."Partial analogue-assisted digital low dropout regulator with transient body-drive and 2.5x FOM improvement".ELECTRONICS LETTERS 54.5(2018):282-283.
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