This paper presents a fast switching CMOS frequency synthesizer with a new coarse tuning method for PHS applications. To achieve the fast lock-time and the low phase noise performance, an efficient bandwidth control scheme is proposed. To change the bandwidth, the charge pump current and the loop filter zero resistor should be changed. Charge pump up/down current mismatches are compensated with the current mismatch compensation block. The proposed coarse tuning method selects the optimal tuning capacitances of the LC-VCO to optimize the phase noise and the lock-time. The measured lock-time is about 20 µs and the phase noise is -121 dBc/ at 600 kHz offset. This chip is fabricated with 0.25 µm CMOS technology, and the die area is 0.7 mm2.1mm. The power consumption is 54 mW at 2.7 V supply voltage.