TPS62421DRCR

Voltage - Output (Min/Fixed):	1.2V, 1.8V (1.8V)
Base Part Number:	TPS62421
Supplier Device Package:	10-VSON (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.25MHz
Current - Output:	600mA, 1A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	6V
Voltage - Input (Min):	2.5V
Number of Outputs:	2
Output Type:	Programmable (Fixed)
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS62421DRCR is a family of integrated high performance DC-DC step down converters with a wide input voltage range that delivers up to 1A of continuous output current over an extended temperature range. It aims to fulfill the ever increasing demand for a cost effective, high efficiency, and low EMI/EMC emitting converter that offers a small solution size and operates with few external components.The TPS62421DRCR device utilizes a synchronous buck converter topology internally to provide high efficiency step-down power conversion from an input voltage of up to 24V down to a regulated output voltage as low as 0.7V. Its current-mode control scheme ensures excellent line and load transient responses, while tight output voltage regulation is achieved using a low-noise, high-accuracy 2.5V reference.The device\'s switching frequency is user settable and it can be optimized for different applications.The TPS62421DRCR also features a built-in power-good (PG) detection logic that complies with the voltage regulation specification and reports the status of the converter’s output via the PG pin.To ensure a reliable, safe operation for the system, the TPS62421DRCR implements various protection circuits, including cycle-by-cycle current limit with hiccup mode, over-temperature protection using a thermally coupled power FET, UVLO, and over-voltage protection.An advanced circuit design, layout guidance, and the use of intrinsically safe materials and components allow the TPS62421DRCR to meet EMC compliance standards without the need for additional EMI components such as snubbers and LC filters.TPS62421DRCR Application FieldThe TPS62421DRCR is an advanced DC-DC converter with power management features suitable for a wide range of applications, including industrial, computing, automotive, communications, portable electronics, and LED lighting.The device provides a solution for several space constraint, portable, and high efficiency systems including:1. Industrial Control Systems: high-end HMI, PLC, motor drivers2. Automotive systems: start/stop electronic control unit, engine ECUs3. Computing and Communication Systems: mobile devices, notebooks, PCs, routers, base stations4. Portable Electronics: medical devices, portable medical instruments, 3D printers5. LED Lighting: indoor and outdoor LED luminairesTPS62421DRCR Working PrincipleThe TPS62421DRCR is a synchronous buck converter operating in the continuous conduction mode. The device consists of an integrated power MOSFET switch and a control section. The MOSFET switch includes a high-side power MOSFET and a low-side power MOSFET connected in series.The control section includes a current-mode PWM (pulse width modulation) controller and an error amplifier. The current-mode PWM controller regulates the average current of the power stage according to the feedback voltage. The error amplifier senses the output voltage and compares it to a 2.5V reference providing an feedback signal to the PWM controller.The TPS62421DRCR is programmed with an adjustable switching frequency typically between 300kHz and 1.5MHz. To improve output voltage ripple, an optional frequency blending technique is available, which modulates the switching frequency within two predefined limits. An optional current limit and hiccup mode are also available to protect the device in case of an overload condition.The device’s output current is adjustable through an external sense resistor, and its output voltage can be set using an external resistor divider. The TPS62421DRCR also contains a power good signal that reports the status of the output voltage.In summary, the distinctive features of the TPS62421DRCR make it a leading DC-DC converter that delivers low output voltage and power with high efficiency. Its wide input voltage range and small solution size makes the device ideal for space-constrained and portable applications. The device’s special circuit design and layout guidance ensure EMC compliance and safe operation over an extended temperature range.

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