1. A 220-MHz Bondwire-Based Fully-Integrated KY Converter With Fast Transient Response Under DCM Operation.
- Author
-
Zeng, Wen-Liang, Lam, Chi-Seng, Sin, Sai-Weng, Maloberti, Franco, Wong, Man-Chung, and Martins, Rui Paulo
- Subjects
- *
PULSE width modulation , *CONVERTERS (Electronics) , *CLOSED loop systems - Abstract
This paper presents a 220-MHz pulse width modulation (PWM) fully integrated KY dc–dc step-up converter utilizing bondwire as power inductor, with discontinuous conduction mode (DCM) calibration control. We develop the first DCM closed-loop PWM controller for the KY converter, including: 1) its parameter design; 2) a DCM closed-loop voltage mode control with Type II compensator; 3) a zero current detection method to activate DCM control; and 4) a DCM calibration loop. Fabricated in 65-nm CMOS, the designed KY converter core occupies 0.93 mm2 and achieves an output conversion range of 1.5–2 V from a 1.2-V input. The measured peak efficiency is 75.2% at 97.5 mW. With a 500-ps rising/falling time of the load current step (56 mA), the undershoot/overshoot is 245/205 mV at 146-/140-ns recovery time, and the dc–dc converter achieves a settling time per load transient step of 2.6 ns/mA, which is competitive with the state-of-the-art boost converters. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF