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TPS53511RGTR
1.5A Step-Down Regulator with Integrated MOSFETs
TPS53511 1315 14
VCC
VREG5VIN
GND 86 7PG PGNDPGND
UDG-13043
TPS53511
www.ti.com SLUSBG4A –MARCH 2013–REVISED JANUARY 2014
4.5-V to 18-V Input, 1.5-A Step-Down Regulator with Integrated Switcher
Checkfor Samples: TPS53511
1FEATURES APPLICATIONS Continuous 1.5-A Output Current • Points-of-Load for Server 4.5-Vto 18-V Supply Voltage Range • Distributed Non-Isolated DC-DC Converters for
Computing Power System• 2-Vto 18-V Conversion Voltage Range DCAP2™ Mode Control Enables Fast Transient DESCRIPTIONResponse The TPS53511is an adaptive on-time D-CAP2™
• Low Output Ripple and Supportall MLCC mode synchronous buck converter. The deviceis
Output Capacitor suitable for points-of-load (POL)in computing power
Skip Mode for Light Load Control systems, and provides a cost-effective, low
component count, low standby current solution. The
• Highly Efficient Integrated FETs Optimized for main control loop for the TPS53511 uses the D-
Lower Duty Cycle Applications CAP2™ mode control providinga fast transient
• High Efficiency, Less than 10-µA Supply response with no external components. The adaptive
Currentat Shutdown on-time control supports seamless operation between
PWM mode during heavy load conditions and
• Adjustable Soft-Start Timereduced frequency operation during light load
• Support Pre-Biased Soft Start conditionsfor high efficiency.
• 700-kHz Switching FrequencyThe TPS53511 includesa proprietary circuit that
• Cycle-By-Cycle Overcurrent Limit enables the deviceto adaptto both low equivalent
• Open Drain Power Good Indication series resistance (ESR) output capacitors, such as
POSCAP or SP-CAP, and ultra-low ESR ceramic
• Internal Bootstrap Switchcapacitors. The device operates from 4.5-Vto 18-V
• Small3 mm×3 mm, 16-Pin QFN (RGT) supply input, and from 2-Vto 18-V input power supply
Package voltage. The device features an adjustable slow start
time anda power good function.It also supports pre-
biased soft start. The TPS53511is availablein the
16-pin QFN package, and designedto operate from
–40°Cto 85°C.
TYPICAL APPLICATION
