Title :
VCCS controlled LDO with small on-chip capacitor
Author :
Qiuli Li ; Yao Qian ; Danzhu Lv ; Zhiliang Hong
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
A stable LDO (Low Drop-Out linear regulator) using VCCS (Voltage Control Current Source) is presented. The LDO is designed and implemented on GF 2P4M 0.35 μm CMOS technology. Compared with previous compensation scheme, VCCS can implement a real stable LDO with a small on-chip capacitor of 1 pF, whose stability is not affected by the variable ESR (Equivalent Series Resistor). The united gain frequency can achieve 1.5 MHz, improving the transient response. Test result shows that the LDO is stable over the full load current, with a maximum output current of 100 mA.
Keywords :
active networks; capacitors; voltage regulators; GF 2P4M CMOS technology; VCCS controlled LDO; capacitance 1 pF; compensation scheme; equivalent series resistor; low drop-out linear regulator; size 0.35 mum; small on-chip capacitor; transient response; variable ESR; voltage control current source; Capacitors; Circuit stability; Logic gates; Regulators; Thermal stability; Transistors; Voltage control;
Conference_Titel :
ASIC (ASICON), 2013 IEEE 10th International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-6415-7
DOI :
10.1109/ASICON.2013.6811903
