TPS65320BQPWPRQ1

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Texas Instruments

AUTOMOTIVE 3.6V TO 36V, 3.2A BUCK CONVERTER WITH AUTO-SOURCED 280MA LDO REGULATOR

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TPS65320BQPWPRQ1

NRND

Texas Instruments

AUTOMOTIVE 3.6V TO 36V, 3.2A BUCK CONVERTER WITH AUTO-SOURCED 280MA LDO REGULATOR

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Description Specifications Series Pricing CAD Documents

Description

General part information

TPS65320 Series

The TPS65320D-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. The LDO regulator features a low-input supply current of 45-µA typical in no-load, also has an integrated MOSFET with an active-low, push-pull reset output pin. The input supply of the LDO regulator auto-source from the output of the buck regulator when it is in operation. Low-voltage tracking feature enables TPS65320D-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.

Technical Specifications

Parameters and characteristics for this part

Specification	TPS65320BQPWPRQ1

Current - Output 1	3.2 A
Current - Output 2	280 mA
Frequency - Switching (Max)	2.5 MHz
Frequency - Switching (Min)	100 kHz
Grade	Automotive
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Package Length	0.173 in
Package Name	14-HTSSOP, 14-PowerTSSOP
Package Width	4.4 mm
Qualification	AEC-Q100
Topology	Step-Down (Buck) (1), Linear (LDO) (1)
Voltage - Output 1 (Max)	20 V
Voltage - Output 1 (Min)	1.1 V
Voltage - Output 2 (Maximum)	5.5 V
Voltage - Output 2 (Minimum)	1.1 V
Voltage - Supply (Maximum)	40 VAC
Voltage - Supply (Minimum)	3.6 V
w/LED Driver	No
w/Sequencer	No
w/Supervisor	Yes

TPS65320 Series

Automotive 3.6V to 36V, 3.2A buck converter with auto-sourced 280mA LDO regulator

Part	Grade	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Output 2 (Minimum)	Current - Output 2	Voltage - Output 2 (Maximum)	w/Supervisor	Frequency - Switching (Max)	Frequency - Switching (Min)	Topology	Qualification	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Voltage - Output 1 (Max)	Voltage - Output 1 (Min)	Current - Output 1	Number of Outputs	w/LED Driver	Package Name	Package Length	Package Width	w/Sequencer	Mounting Type	Board Type	Supplied Contents	Total Output Count	Output Type	Non-Isolated Output Count	Main Purpose	Contents	Utilized IC / Part	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Current - Output (Min)	Current - Output (Max)	Voltage - Output	Frequency - Switching	Regulator Topology
Texas Instruments TPS65320CQPWPRQ1	Automotive	125 °C	-40 °C	1.1 V	280 mA	5.5 V	Yes	2.5 MHz	100 kHz	Linear (LDO) (1) Step-Down (Buck) (1)	AEC-Q100	36 VDC	3.6 V	20 V	1.1 V	3.2 A	2	No	14-HTSSOP 14-PowerTSSOP	0.173 in	4.4 mm	No	Surface Mount
Texas Instruments TPS65320EVM																								Fully Populated	Board(s)	2	Non-Isolated	2 count	DC/DC Step Down with LDO	Board	TPS65320	3.6 V	40 V	280 mA	3.2 A	3.3 V 5 VDC	2.1 MHz 110 kHz 400 kHz	Buck
Texas Instruments TPS65320DQPWPRQ1	Automotive	125 °C	-40 °C	1.1 V	280 mA	5.5 V	Yes	2.5 MHz	100 kHz	Linear (LDO) (1) Step-Down (Buck) (1)	AEC-Q100	36 VDC	3.6 V	20 V	1.1 V	3.2 A	2	No	14-HTSSOP 14-PowerTSSOP	0.173 in	4.4 mm	No	Surface Mount
Texas Instruments TPS65320BQPWPRQ1	Automotive	125 °C	-40 °C	1.1 V	280 mA	5.5 V	Yes	2.5 MHz	100 kHz	Linear (LDO) (1) Step-Down (Buck) (1)	AEC-Q100	40 VAC	3.6 V	20 V	1.1 V	3.2 A	2	No	14-HTSSOP 14-PowerTSSOP	0.173 in	4.4 mm	No	Surface Mount
Texas Instruments TPS65320C-EVM																								Fully Populated	Board(s)	2	Non-Isolated	2 count	DC/DC Step Down with LDO	Board	TPS65320C-Q1	3.6 V	40 V	280 mA	3.2 A	3.3 V 5 VDC	2.1 MHz 110 kHz 400 kHz	Buck
Texas Instruments TPS65320QPWPRQ1	Automotive	125 °C	-40 °C	1.1 V	280 mA	5.5 V	Yes	2.5 MHz	100 kHz	Linear (LDO) (1) Step-Down (Buck) (1)	AEC-Q100	40 VAC	3.6 V	20 V	1.1 V	3.2 A	2	No	14-HTSSOP 14-PowerTSSOP	0.173 in	4.4 mm	No	Surface Mount

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

TPS65320-Q1 40-V Step-Down Converter With Eco-mode and LDO Regulator datasheet (Rev. F)