TPS62903-Q1 Series

Automotive, 3-V to 18-V, 3-A low-IQ synchronous buck converter with 165°C junction temperature

Catalog

Automotive, 3-V to 18-V, 3-A low-IQ synchronous buck converter with 165°C junction temperature

Part	Synchronous Rectifier	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Package / Case	Voltage - Output (Max) [Max]	Voltage - Output (Min/Fixed)	Supplier Device Package [x]	Supplier Device Package	Supplier Device Package [y]	Output Configuration	Frequency - Switching	Current - Output	Voltage - Input (Min) [Min]	Number of Outputs	Topology	Voltage - Input (Max) [Max]	Function	Qualification	Grade
Texas Instruments TPS62903RPJR		Adjustable	150 °C	-40 °C	Surface Mount	9-VFQFN	5.5 V	0.4 V	1.5	9-VQFN-HR	2	Positive	1 MHz 2.5 MHz	3 A	3 V	1	Buck	17 V	Step-Down
Texas Instruments TPS62903QRYTRQ1		Adjustable	165 °C	-40 °C	Surface Mount Wettable Flank	9-TFQFN	5.5 V	0.4 V		9-VQFN-HR (2.2x2)		Positive	1 MHz 2.5 MHz	3 A	3 V	1	Buck	18 V	Step-Down	AEC-Q100	Automotive

Catalog

Automotive, 3-V to 18-V, 3-A low-IQ synchronous buck converter with 165°C junction temperature

Key Features

• AEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, T ALevel 2 device HBM ESD classificationLevel C4B CDM ESD classificationFunctional Safety-CapableDocumentation available to aid functional safety system designExtended T J range: up to 165°CHigh efficiency DCS-Control topologyR DS(ON): 62-mΩ high side, 22-mΩ low sideSeamless PWM/PFM transitionInternal compensation4-µA low I Q (typical)Up to 3-A continuous output current±1.5% output voltage accuracy across tempConfigurable output voltage options:0.6-V to 5.5-V V FB external dividerV SET internal divider16 options between 0.4 V and 5.5 VFlexibility through the MODE/S-CONF pin2.5-MHz or 1.0-MHz switching frequencyForced PWM or Auto PFM (power save mode) with dynamic mode change optionOutput discharge on and offNo external bootstrap capacitor requiredOvercurrent and overtemperature protection100% duty cycle modePrecise enable inputAdjustable soft start and trackingPower-good outputOptimized pinout for single-layer routingWettable 2.2-mm × 2.0-mm VQFN package with 0.5-mm pitchCreate a custom design with the TPS62903-Q1 using theWEBENCH Power DesignerAEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, T ALevel 2 device HBM ESD classificationLevel C4B CDM ESD classificationFunctional Safety-CapableDocumentation available to aid functional safety system designExtended T J range: up to 165°CHigh efficiency DCS-Control topologyR DS(ON): 62-mΩ high side, 22-mΩ low sideSeamless PWM/PFM transitionInternal compensation4-µA low I Q (typical)Up to 3-A continuous output current±1.5% output voltage accuracy across tempConfigurable output voltage options:0.6-V to 5.5-V V FB external dividerV SET internal divider16 options between 0.4 V and 5.5 VFlexibility through the MODE/S-CONF pin2.5-MHz or 1.0-MHz switching frequencyForced PWM or Auto PFM (power save mode) with dynamic mode change optionOutput discharge on and offNo external bootstrap capacitor requiredOvercurrent and overtemperature protection100% duty cycle modePrecise enable inputAdjustable soft start and trackingPower-good outputOptimized pinout for single-layer routingWettable 2.2-mm × 2.0-mm VQFN package with 0.5-mm pitchCreate a custom design with the TPS62903-Q1 using theWEBENCH Power Designer

Description

The TPS62903-Q1 is a highly efficient, small, and flexible synchronous step-down DC/DC converter that is easy to use. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high V OUT accuracy of ± 1.5% across the entire operating temperature range and enhanced load transient performance with the DCS-Control topology. The wide 3-V to 18-V input voltage range supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails. The TPS62903-Q1 can automatically enter power save mode (if auto PFM or PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 µA. AEE, if enabled, provides high efficiency across V IN, V OUT, and load current. The device includes a MODE/Smart-CONF input to set the internal and external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation. The TPS62903-Q1 is a highly efficient, small, and flexible synchronous step-down DC/DC converter that is easy to use. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high V OUT accuracy of ± 1.5% across the entire operating temperature range and enhanced load transient performance with the DCS-Control topology. The wide 3-V to 18-V input voltage range supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails. The TPS62903-Q1 can automatically enter power save mode (if auto PFM or PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 µA. AEE, if enabled, provides high efficiency across V IN, V OUT, and load current. The device includes a MODE/Smart-CONF input to set the internal and external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation.