Name
Title | ||
|---|---|---|
An Ultralow-Power Fast-Transient Capacitor-Free Low-Dropout Regulator With Assistant Push–Pull Output Stage |
Abstract | ||
|---|---|---|
An output capacitor-free low-dropout regulator (LDO) using a class-AB operational amplifier and an assistant push-pull output stage (APPOS) circuit to enable fast-transient response with ultralow-power dissipation is presented in this brief. The APPOS circuit is proposed to deliver an extra current that is directly proportional to the output current of the class-AB operational amplifier during transient state with an automatic on/off feature. Moreover, the small-signal and large-signal responses of LDO can be separately optimized. As a result, transient performances of LDO are improved significantly without requiring an area-consuming on-chip capacitor anymore. The proposed LDO has been implemented in a standard 0.35-μm CMOS process. Experimental results show that the LDO can regulate the output voltage at 1.0 V from a 1.2-V supply voltage for the maximum load current of 100 mA. The output voltage fully recovers within 2.7 μs with the load current switching from 100 μA to 100 mA at a 1.2- μA quiescent current. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/TCSII.2012.2235732 | IEEE Trans. on Circuits and Systems |
Keywords | Field | DocType |
high slew rate,cmos analogue integrated circuits,small-signal responses,low-dropout regulator (ldo),time 2.7 mus,fast-transient response,voltage 1.2 v,transient state,standard cmos process,ultralow-power fast-transient capacitor-free low-dropout regulator,ultralow-power dissipation,operational amplifiers,low-power electronics,current 1.2 ma,voltage regulators,size 0.35 mum,low quiescent current,class-ab operational amplifier,large-signal responses,transient response,appos circuit,ldo transient performances,assistant push-pull output stage circuit,current 100 mua to 100 ma,voltage 1.0 v | Capacitor,Control theory,Dissipation,Voltage,Transient state,Electronic engineering,Push–pull output,Operational amplifier,Low-dropout regulator,Mathematics,Biasing | Journal |
Volume | Issue | ISSN |
60 | 2 | 1549-7747 |
Citations | PageRank | References |
14 | 0.93 | 5 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Xi Qu | 1 | 27 | 4.83 |
| Ze-kun Zhou | 2 | 106 | 16.77 |
| Bo Zhang | 3 | 328 | 42.62 |
| Zhaoji Li | 4 | 23 | 7.27 |