TPS53128 Series

4.5-V to 24-V, synchronous dual-D-CAP2 buck controller

Catalog(3 parts)

Part	Topology	Supplier Device Package	Number of Outputs▲▼	Mounting Type	Output Phases▲▼	Frequency - Switching▲▼	Voltage - Supply (Vcc/Vdd)▲▼	Voltage - Supply (Vcc/Vdd)▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Output Type	Function	Output Configuration	Package / Case	Control Features	Package / Case▲▼	Package / Case▲▼
Texas Instruments TPS53128RGER Buck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4)	Buck	24-VQFN (4x4)	2 ul	Surface Mount	1 ul	350000 Hz	24 V	4.5 V	85 °C	-40 °C	Transistor Driver	Step-Down	Positive	24-VFQFN Exposed Pad	Current Limit, Enable, Soft Start
Texas Instruments TPS53128RGET Buck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4)	Buck	24-VQFN (4x4)	2 ul	Surface Mount	1 ul	350000 Hz	24 V	4.5 V	85 °C	-40 °C	Transistor Driver	Step-Down	Positive	24-VFQFN Exposed Pad	Current Limit, Enable, Soft Start
Texas Instruments TPS53128PWR Buck Regulator Positive Output Step-Down DC-DC Controller IC 24-TSSOP	Buck	24-TSSOP	2 ul	Surface Mount	1 ul	350000 Hz	24 V	4.5 V	85 °C	-40 °C	Transistor Driver	Step-Down	Positive	24-TSSOP	Current Limit, Enable, Soft Start	0.004399999976158142 m	0.004394200164824724 m

Key Features

• D-CAP2 Mode™ ControlFast Transient ResponseNo External Parts Required for LoopCompensationCompatible With Ceramic OutputCapacitorsHigh Initial Reference Accuracy (±1%)Low Output RippleWide Input Voltage Range: 4.5 V to 24 VOutput Voltage Range: 0.76 V to 5.5 VLow-Side RDS(ON)Loss-LessCurrent SensingAdaptive Gate Drivers with IntegratedBoost DiodeAdjustable Soft StartNon-Sinking Pre-Biased Soft Start350-kHz Switching FrequencyCycle-by-Cycle Over-Current Limiting Control30-mV to 300-mV OCP Threshold VoltageThermally Compensated OCP by 4000 ppm/°C atITRIPAuto-Skip Eco-mode for High Efficiency atLight LoadAPPLICATIONSPoint-of-Load Regulation in Low PowerSystems for Wide Range of ApplicationsDigital TV Power SupplyNetworking Home TerminalDigital Set-Top Box (STB)DVD Player/RecorderGaming ConsolesD-CAP2 Mode™ ControlFast Transient ResponseNo External Parts Required for LoopCompensationCompatible With Ceramic OutputCapacitorsHigh Initial Reference Accuracy (±1%)Low Output RippleWide Input Voltage Range: 4.5 V to 24 VOutput Voltage Range: 0.76 V to 5.5 VLow-Side RDS(ON)Loss-LessCurrent SensingAdaptive Gate Drivers with IntegratedBoost DiodeAdjustable Soft StartNon-Sinking Pre-Biased Soft Start350-kHz Switching FrequencyCycle-by-Cycle Over-Current Limiting Control30-mV to 300-mV OCP Threshold VoltageThermally Compensated OCP by 4000 ppm/°C atITRIPAuto-Skip Eco-mode for High Efficiency atLight LoadAPPLICATIONSPoint-of-Load Regulation in Low PowerSystems for Wide Range of ApplicationsDigital TV Power SupplyNetworking Home TerminalDigital Set-Top Box (STB)DVD Player/RecorderGaming Consoles

Description

The TPS53128 is a dual, adaptive on-time D-CAP2 mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment's power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53128 uses the D-CAP2 Mode topology which provides a very fast transient response with no external component. The TPS53128 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. 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 part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V. The TPS53128 is available in 4-mm x 4-mm 24 pin QFN (RGE) or 24 pin TSSOP (PW) packages, and is specified from –40°C to 85°C ambient temperature range. The TPS53128 is a dual, adaptive on-time D-CAP2 mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of various end equipment's power bus regulators with a low external component count and low standby consumption. The main control loop for the TPS53128 uses the D-CAP2 Mode topology which provides a very fast transient response with no external component. The TPS53128 also has a proprietary circuit that enables the device to adapt not only low equivalent series resistance (ESR) output capacitors such as POSCAP/SP-CAP, but also ceramic capacitor. 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 part provides a convenient and efficient operation with conversion voltages from 4.5 V to 24 V and output voltage from 0.76 V to 5.5 V. The TPS53128 is available in 4-mm x 4-mm 24 pin QFN (RGE) or 24 pin TSSOP (PW) packages, and is specified from –40°C to 85°C ambient temperature range.