TPS51727
www.ti.com . SLUS806B – APRIL 2008 – REVISED JANUARY 2009 DUAL-PHASE, ECO-MODE™ STEP-DOWN POWER MANAGEMENT IC FOR 50-A+
APPLICATIONS
FEATURES 1 DESCRIPTION Seamless Phase Add/Drop Enables Maximum
Efficiency Under Any Load Condition Minimum External Parts Count В±8 mV VOUT Accuracy Over Line/Load/Temp. 5-Bit DAC with 0.4-V to 1.25-V Output Range
Supports Wide Range of Applications Optimized Efficiency at Light & Heavy Loads Patent Pending Output Overshoot Reduction
(OSRв„ў) Accurate, Adjustable Voltage Positioning Selectable 200/300/400/500 kHz Frequency Pat. pending AutoBalanceв„ў Phase Balancing Supports Resistor or Inductor DCR Current
Sensing Accurate, Selectable Current Limit 4.5-V to 28-V Conversion Voltage Range Fast MOSFET Driver w/Integrated Boost Diode Integrated OVP Can Be Disabled Thermal
Sensor and Output Power Monitor Small 6 Г— 6, 40-Pin QFN PowerPADв„ў Package
2 The TPS51727 is a complete, step down controller
with integrated gate drivers. The PCNT pin enables
operation in dual or single-phase mode to optimize
efficiency depending on the load requirements. The
advanced D-CAP+в„ў architecture provides fast
transient response with minimum output capacitance.
The DAC supports VID-on-the-fly transitions to
optimize the output voltage to the operating state of
the system to meet idle power requirements. The
auto-skip feature of the TPS51727 optimizes
light-load efficiency in both single and dual phase
operation. System management features include an
adjustable thermal sensor, output power monitoring
and sleep state controls. Adjustable control of VOUT …
