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TPS51124 Datasheet PDF

Part Series:TPS51124 Series
Description:Dual Synchronous Step Down Controller for Low Voltage System Power
Document:TPS51124RGET Datasheet PDF (51 Pages)

TPS51124 Datasheet PDF

28 Pages
TI
DC DC Cntrlr Dual-OUT Sync Buck 3V to 28V Input 24Pin VQFN EP T/R
28 Pages
TI
Dual Synchronous Step Down Controller for Low Voltage System Power

TPS51124 - TI Specifications

TYPE
DESCRIPTION
Case/Package
VQFN-24
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TPS51124 - TI Function Overview

The TPS51124 is a dual, adaptive on-time D-CAP™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The main control loop for the TPS51124 uses the D-CAP mode that optimized for low ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing. The part provides a convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V and output voltages from 0.76 V to 5.5 V.
The TPS51124 is available in 24-pin VQFN package specified from –40°C to 85°C ambient temperature range.
High Efficiency, Low-Power Consumption, Shutdowns to <1 µA
Fixed Frequency Emulated On-Time Control, Frequency Selectable
From Three Options
D-CAP Mode Enables Fast Transient Response
Auto-Skip Mode
Less Than 1% Initial Reference Accuracy
Low Output Ripple
Wide Input Voltage Range: 3 V to 28 V
Output Voltage Range: 0.76 V to 5.5 V
Low-Side RDS(ON) Loss-less Current Sensing
Adaptive Gate Drivers With Integrated Boost Diode
Internal 1.2-ms Voltage-Servo Soft-Start
Powergood Signals for Each Channel With Delay Timer
Output Discharge During Disable, Fault
APPLICATIONS
Notebook I/O and Low-Voltage System Bus
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