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This literature is subject to all applicable copyright laws and is not for resale in any manner.2 FAN49101 2 A, 1.8 MHz, TinyPower I C Buck-Boost Regulator September 2016 2 FAN49101 2 A, 1.8 MHz, TinyPower I C Buck- Boost Regulator Features Description 24 A Typical PFM Quiescent Current The FAN49101 is a high efficiency buck-boost switching mode regulator which accepts input voltages either Above 95% Efficiency above or below the regulated output voltage. Using full- 2 Total Layout Area = 11.61 mm bridge architecture with synchronous rectification, the FAN49101 is capable of delivering up to 2 A while Input Voltage Range: 2.5 V to 5.5 V regulating the output at 3.4 V. The FAN49101 exhibits 2 I C Compatible Interface seamless transition between step-up and step-down modes reducing output disturbances. The output voltage 1.8 MHz Fixed-Frequency Operation in PWM Mode and operation mode of the regulator can be 2 Automatic / Seamless Step-up and Step-down programmed through an I C interface. Mode Transitions At moderate and light loads, Pulse Frequency Forced PWM and Automatic PFM/PWM Mode Modulation (PFM) is used to operate the device in Selection power-save mode to maintain high efficiency. In PFM mode, the part still exhibits excellent transient response 0.5 A Typical Shutdown Current during load steps. At moderate to heavier loads or Low Quiescent Current Pass-Through Mode Forced PWM mode, the regulator switches to PWM fixed-frequency control. While in PWM mode, the Internal Soft-Start and Output Discharge regulator operates at a nominal fixed frequency of Low Ripple and Excellent Transient Response 1.8 MHz, which allows for reduced external component values. Internally Set, Automatic Safety Protections (UVLO, OTP, SCP, OCP) Applications Smart Phones Tablets, Netbooks , Ultra-Mobile PCs Portable Devices with Li-ion Battery 2G/3G/4G Power Amplifiers NFC Applications Additional Information Figure 1. Typical Application For the full datasheet, please contact a Fairchild Sales Representative. Ordering Information Part Number Output Discharge Temperature Range Packing Method FAN49101AUC340X Yes -40 to 85C Tape and Reel 2015 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN49101 Rev.1.1