TPS65283-1 Series

4.5 V to 18 V input, 3.5 A / 2.5 A, synchronous dual buck converter in FCCM mode

Catalog

4.5 V to 18 V input, 3.5 A / 2.5 A, synchronous dual buck converter in FCCM mode

Part	Frequency - Switching	Current - Output	Regulator Topology	Voltage - Output	Utilized IC / Part	Outputs and Type	Outputs and Type	Voltage - Input [Max]	Voltage - Input [Min]	Supplied Contents	Board Type	Main Purpose	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Package / Case	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Voltage - Output (Min/Fixed)	Output Type	Function	Output Configuration	Topology	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package
Texas Instruments TPS65283EVM-646	500 kHz	2.5 A 3.5 A	Buck	1.2 V 5 V	TPS65283	2	Non-Isolated	18 V	4.5 V	Board(s)	Fully Populated	DC/DC Step Down
Texas Instruments TPS65283-1RGET		2.5 A 3.5 A											18 V	9 V	4.5 V	24-VFQFN Exposed Pad	2	-40 °C	125 ¯C	Surface Mount	0.6 V	Adjustable	Step-Down	Positive	Buck	2 MHz	200 kHz	24-VQFN (4x4)
Texas Instruments TPS65283RGER		2.5 A 3.5 A											18 V	9 V	4.5 V	24-VFQFN Exposed Pad	2	-40 °C	125 ¯C	Surface Mount	0.6 V	Adjustable	Step-Down	Positive	Buck	2 MHz	200 kHz	24-VQFN (4x4)
Texas Instruments TPS65283RGET		2.5 A 3.5 A											18 V	9 V	4.5 V	24-VFQFN Exposed Pad	2	-40 °C	125 ¯C	Surface Mount	0.6 V	Adjustable	Step-Down	Positive	Buck	2 MHz	200 kHz	24-VQFN (4x4)

Catalog

4.5 V to 18 V input, 3.5 A / 2.5 A, synchronous dual buck converter in FCCM mode

Key Features

• Buck ConverterWide input voltage range 4.5 to 18 VIntegrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)Feedback reference voltage 0.6 V ±1%Adjustable switching frequency 200 kHz to2 MHzInternal built soft start time 2.4 msExternal clock synchronizationCycle-by-cycle current limitPower good indicator for each buckContinuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light loadPower distribution switchIntegrated a power distribution switch with on-resistance 60 mΩOperating input voltage range 2.4 to 6 VAdjustable current limiting up to 2.7 ACurrent-limit accuracy ±10% at 1.25 A (typical)Auto recovery overcurrent protectionReverse input to output voltage protectionOvertemperature protection24-lead VQFN (RGE) 4-mm × 4-mm packageBuck ConverterWide input voltage range 4.5 to 18 VIntegrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)Feedback reference voltage 0.6 V ±1%Adjustable switching frequency 200 kHz to2 MHzInternal built soft start time 2.4 msExternal clock synchronizationCycle-by-cycle current limitPower good indicator for each buckContinuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light loadPower distribution switchIntegrated a power distribution switch with on-resistance 60 mΩOperating input voltage range 2.4 to 6 VAdjustable current limiting up to 2.7 ACurrent-limit accuracy ±10% at 1.25 A (typical)Auto recovery overcurrent protectionReverse input to output voltage protectionOvertemperature protection24-lead VQFN (RGE) 4-mm × 4-mm package

Description

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required. The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions. Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device. The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required. The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions. Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.