General Description
The RT5760 is a simple, easy-to-use, 1A synchronous
step-down DC-DC converter with an input supply
voltage range of 2.5V to 6V. The device build-in an
accurate 0.6V reference voltage and integrates low
RDS(ON) power MOSFETs to achieve high efficiency in
a SOT-563 (FC) package.
The RT5760 adopts Advanced Constant On-Time
(ACOTTM) control architecture to provide an ultrafast
transient response with few external components and
to operate in nearly constant switching frequency over
the line, load, and output voltage range. The RT5760A
operates in automatic PSM that maintains high
efficiency during light load operation. The RT5760B
operates in Forced PWM that helps meet tight voltage
regulation accuracy requirements. The RT5760C/D
remove the power good indicator function of the
RT5760A/B for different application.
The RT5760 senses both FETs current for a robust
over-current protection. The device features
cycle-by-cycle current limit protection and prevent the
device from the catastrophic damage in output short
circuit, over current or inductor saturation. A built-in
soft-start function prevents inrush current during
start-up. The device also includes input under-voltage
lockout, output under-voltage protection, and
over-temperature protection (thermal shutdown) to
provide safe and smooth operation in all operating
conditions.

Features
 Input Voltage Range of 2.5V to 6V
 Integrated 120m and 80m FETs
 1A Output Current, up to 95% Efficiency
 100% Duty Cycle for Lowest Dropout
 0.6V, 1% Internal Reference Voltage
 2.2MHz Typical Switching Frequency
 Power Saving Mode for Light Loads (RT5760A/C)
 Low Shutdown Current  1A
 Low Quiescent Current: 25A (Typ.)
 Fast Advanced Constant On-Time (ACOTTM
Control
 Internal Soft Startup (0.6ms)
 Independent Enable Control Input
 Power Good Indicator
 Both FETs Over-Current Protection
 Input Under-Voltage Lockout Protection
 Hiccup-Mode Output Under-Voltage Protection
 Over-Temperature Protection (Thermal Shutdown)
 RoHS Compliant and Halogen Free

Applications
 Mobile Phones and Handheld Devices
 STB, Cable Modem, and xDSL Platforms
 WLAN ASIC Power / Storage (SSD and HDD)
 General Purpose for POL LV Buck Converter