TPS5120-Q1 Series

Automotive 4.5V to 28V Dual Two-Phase Synchronous Buck Controller

Catalog

Automotive 4.5V to 28V Dual Two-Phase Synchronous Buck Controller

Part	Supplier Device Package	Duty Cycle (Max) [Max]	Frequency - Switching	Output Configuration	Mounting Type	Function	Output Phases	Topology	Package / Case [x]	Package / Case [y]	Package / Case	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Qualification	Control Features	Output Type	Grade
Texas Instruments TPS5120QDBTRQ1	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	125 ¯C	2	AEC-Q100	Enable Power Good Soft Start	Transistor Driver	Automotive
Texas Instruments TPS5120DBT	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	85 °C	2		Enable Power Good Soft Start	Transistor Driver
Texas Instruments TPS5120DBTG4	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	85 °C	2		Enable Power Good Soft Start	Transistor Driver
Texas Instruments TPS5120DBTR	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	85 °C	2		Enable Power Good Soft Start	Transistor Driver
Texas Instruments TPS5120QDBTRQ1G4	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	125 ¯C	2	AEC-Q100	Enable Power Good Soft Start	Transistor Driver	Automotive
Texas Instruments TPS5120DBTRG4	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	85 °C	2		Enable Power Good Soft Start	Transistor Driver
Texas Instruments TPS5120QDBTREP	30-TSSOP	83 %	300 kHz	Positive	Surface Mount	Step-Down	2	Buck	0.173 in	4.4 mm Width	30-TFSOP	4.5 V	28 V	-40 °C	125 ¯C	2		Enable Power Good Soft Start	Transistor Driver

Catalog

Automotive 4.5V to 28V Dual Two-Phase Synchronous Buck Controller

Key Features

• Qualified for Automotive ApplicationsIndependent Dual-Outputs Operate 180° Out of PhaseWide Input Voltage Range: 4.5-V – 28-VAdjustable Output Voltage Down to 0.9 VPin-Selectable PWM/SKIP Mode for High Efficiency Under Light LoadsSynchronous Buck Operation Allows up to 95% EfficiencySeparate Standby Control and Overcurrent Protection for Each ChannelProgrammable Short-Circuit ProtectionLow Supply (1 mA) and Shutdown (1 nA) CurrentPower Good OutputHigh-Speed Error AmplifiersSequencing Easily Achieved by Selecting Softstart Capacitor Values.5-V Linear Regulator Power Internal IC Circuitry30-Pin TSSOP PackagingGate Leakage Test Passing Level is 50 VQualified for Automotive ApplicationsIndependent Dual-Outputs Operate 180° Out of PhaseWide Input Voltage Range: 4.5-V – 28-VAdjustable Output Voltage Down to 0.9 VPin-Selectable PWM/SKIP Mode for High Efficiency Under Light LoadsSynchronous Buck Operation Allows up to 95% EfficiencySeparate Standby Control and Overcurrent Protection for Each ChannelProgrammable Short-Circuit ProtectionLow Supply (1 mA) and Shutdown (1 nA) CurrentPower Good OutputHigh-Speed Error AmplifiersSequencing Easily Achieved by Selecting Softstart Capacitor Values.5-V Linear Regulator Power Internal IC Circuitry30-Pin TSSOP PackagingGate Leakage Test Passing Level is 50 V

Description

The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability. The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.