XR77103-A0R5 Datasheet, PDF (1/19 Pages) Exar Corporation – Universal PMIC 3-Output Buck Regulator

XR77103-A0R5
Universal PMIC 3-Output Buck Regulator
Description
The XR77103-A0R5 universal PMIC features three 2A synchronous
high-efficiency, buck regulators with integrated power switches. They
can operate in 5V, 9V and 12V powered systems with minimal required
external component thus providing the smallest size solution possible.
Two of the outputs may be paralleled for output currents up to 5A peak
with steady state current of up to 4A.
The output voltage of each converter can be adjusted by external
resistor divider down to voltage as low as 0.8V. With a nominal switching
frequency of 500kHz, the regulators can also be synchronized to an
external clock in applications where EMI control is critical.
XR77103-A0R5 features a supervisor circuit that monitors each
converter output. PGOOD pin is asserted once sequencing is done,
outputs are reported in regulation and the reset timer expires.
The polarity of the signal is active high. A pulse skipping mode (PSM)
reduces switching losses maintaining high efficiency when the system
is unloaded or in standby mode.
FEATURES
■■ 4.5V to 14V wide input supply
voltage range
■■ Built-in MOSFET and synchronous rectifier
■■ 0.8V, high accuracy reference (1%)
■■ Current-mode control with simple
compensation circuit
■■ External synchronization
■■ Power good
■■ _Protection
Thermal shutdown
Overvoltage transient protection
Overcurrent protection
■■ 32-pin 4mm x 4mm TQFN package
APPLICATIONS
■■ FPGA and DSP supplies
■■ Video processor supplies
■■ Applications processor power
REV1A
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