TPS65321A-Q1 Series

Automotive 3.6V to 36V, 3.2A Buck Converter with Wide Vin 280mA LDO Regulator

Catalog

Automotive 3.6V to 36V, 3.2A Buck Converter with Wide Vin 280mA LDO Regulator

Part	Board Type	Outputs and Type	Outputs and Type	Voltage - Input [Max]	Voltage - Input [Min]	Current - Output	Voltage - Output	Regulator Topology	Main Purpose	Utilized IC / Part	Supplied Contents	Mounting Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package	Voltage/Current - Output 2 [Max]	Voltage/Current - Output 2	Voltage/Current - Output 2 [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Voltage/Current - Output 1 [Max] [custom]	Voltage/Current - Output 1 [custom]	Voltage/Current - Output 1 [Min] [custom]	Topology	Voltage - Supply [Max]	Voltage - Supply [Min]	Grade	Package / Case	Package / Case [y]	Package / Case [x]	Number of Outputs	Qualification
Texas Instruments TPS65321EVM	Fully Populated	2	Non-Isolated	36 V	3.6 V	3.2 A 280 mA	3.3 V 5 V	Buck	DC/DC Step Down with LDO	TPS65321-Q1	Board(s)
Texas Instruments TPS65321QPWPRQ1												Surface Mount	2.5 MHz	100 kHz	14-HTSSOP	5.5 V	280 mA	1.1 V	125 °C	-40 °C	20 V	3.2 A	1.1 V	Linear (LDO) (1) Step-Down (Buck) (1)	36 V	3 V	Automotive	14-PowerTSSOP	4.4 mm	0.173 in	2	AEC-Q100
Texas Instruments TPS65321AQPWPRQ1												Surface Mount	2.5 MHz	100 kHz	14-HTSSOP	5.5 V	280 mA	1.1 V	125 °C	-40 °C	20 V	3.2 A	1.1 V	Linear (LDO) (1) Step-Down (Buck) (1)	36 V	3 V	Automotive	14-PowerTSSOP	4.4 mm	0.173 in	2	AEC-Q100

Catalog

Automotive 3.6V to 36V, 3.2A Buck Converter with Wide Vin 280mA LDO Regulator

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BOne High-VIN Step-Down DC-DC ConverterInput Range of 3.6 V to 36 V250-mΩ High-Side MOSFETMaximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 VAdjustable Switching Frequency 100 kHz to 2.5 MHzSynchronizes to External ClockHigh Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control SchemeMaximum 140-µA Operating Quiescent CurrentReset Output-Pin (Active Low, Open-Drain)One High-VIN Low-Dropout (LDO) Voltage RegulatorInput Range of 3 V to 36 V280-mA Current Capability With Typical 35-µA Quiescent Current in No-Load ConditionLow-Dropout Voltage of 300 mV atIO= 200 mA (Typical)Overcurrent Protection for Both RegulatorsOvertemperature Protection14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit PackageQualified for Automotive ApplicationsAEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BOne High-VIN Step-Down DC-DC ConverterInput Range of 3.6 V to 36 V250-mΩ High-Side MOSFETMaximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 VAdjustable Switching Frequency 100 kHz to 2.5 MHzSynchronizes to External ClockHigh Efficiency at Light Loads With Pulse-Skipping Eco-mode™ Control SchemeMaximum 140-µA Operating Quiescent CurrentReset Output-Pin (Active Low, Open-Drain)One High-VIN Low-Dropout (LDO) Voltage RegulatorInput Range of 3 V to 36 V280-mA Current Capability With Typical 35-µA Quiescent Current in No-Load ConditionLow-Dropout Voltage of 300 mV atIO= 200 mA (Typical)Overcurrent Protection for Both RegulatorsOvertemperature Protection14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit Package

Description

The TPS65321A-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET with an active-low, open-drain power-good output-pin (nRST). The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET. Low-voltage tracking feature enables TPS65321A-Q1 to track the input supply during cold-crank conditions. The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 µA. The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low. The TPS65321A-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET with an active-low, open-drain power-good output-pin (nRST). The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET. Low-voltage tracking feature enables TPS65321A-Q1 to track the input supply during cold-crank conditions. The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 µA. The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.