FAN5361UMP182X

The FAN5361 is a 600 mA or 750 mA step-down, switching voltage regulator that delivers a fixed output from a 2.3 V to 5.5 V input voltage supply using a proprietary architecture With synchronous rectification, the FAN5361 is capable Of delivering a peak efficiency Of 92%, While maintaining efficiency over 80% at load currents as IOW as I mA. The regulator operates at a nominal fixed frequency Of 6 MHz, Which reduces the value Of the external components to 470 nH for the output inductor and 4.7 uF for the output capacitor. The PWM modulator can be synchronized to an external frequency source. At mtxierate and light loads, pulse frequency modulation is used to operate the device in power-save mode with a typical quiescent current Of 35 uA. Even With such a IOW quiescent current, the part exhibits excellent transient response during large bad swings. At higher loads, the system automatically switches to fixed-frequency control, operating at 6 MHz. In shutdown mode, the supply current drops below 1 uA, reducing power consumption. For applications that require minimum ripple or fixed frequency, PFM can be disabled using the MODE pin. The FAN5361 is in 6-bump, 0.4 mm pitch, Wafer- Level Chip-scale Package (WLCSP) and a 6-lead 2 x 2 mm ultra-thin MLP package (UMLP).

• 6 MHz Fixed-Frequency Operation
• 35 uA Typical Quiescent Current
• Best-in-Class Load Transient Response
• Best-in-Class Efficiency
• 600 mA or 750 mA Output Current Capability
• 2.3 V to V Input Voltage Range
• 1.0 to I .90 V Fixed Output Voltage
• LOW Ripple Light-Load PFM Mode
• Forced PWM and External Clock Synchronization
• Internal Soft-start
• Input under-voltage Lockout (UVLO)
• Thermal Shutdovm and Overload Protection
• 6-bump mcsp, 0.4 mm Pitch
• 6-pin 2 x2 mm UMLP