RT8129AGQW

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 13.2 V
Supplier Device Package:	10-WDFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Frequency - Switching:	300kHz
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Controllers

The RT8129AGQW represents the latest in DC/DC switching controllers from Richtek, a trusted name in providing integrated power solutions. It is specifically designed to deliver industry-leading power efficiency and manageability for data centre and AC/DC regulation applications. RT8129AGQW offers high performance, integrated power solution for data center and AC/DC regulation. It supports a wide input voltage range from 4.5V to 26V and provides an adjustable output voltage from 0.6V to 20V. This device also integrates a soft start feature to minimize current surge during startup and limit the peak current consumption.The RT8129AGQW offers a low quiescent current of only 7 µA, which allows for more efficient power management and longer standby time. It offers superior transient performance and EMI filtering performance. This device is designed to provide excellent current limiter, thermal protection, over voltage protection and under voltage protection. The high switching frequency of 400kHz allows designers to achieve higher levels of power efficiency and to reduce the output capacitor size.The operating principle of the RT8129AGQW is based on a switching regulator which uses a pulse width modulation (PWM) technique, also known as pulse width modulated (PWM) switching. This device is an integrated power regulator and switching controller that uses an external MOSFET for load regulation. The internal PWM oscillator performs the switching, where the duty cycle of the output switches is determined by the feedback voltage. The oscillator frequency is set by an external resistor RSET and the maximum switching frequency is defined by the maximum duty cycle of 50%.For data centre and AC/DC regulation applications, the RT8129AGQW requires only one external MOSFET which reduces the number of external components and board space. This device also comes with an integrated over current limiting (OCL) circuit and an internal fast start up time. The OCL circuitry maintains a constant voltage supply to the load even when a large current is drawn, which prevents overloading the output and offers improved system reliability.In addition, the RT8129AGQW also integrates a power saving function which allows system designers to reduce the total quiescent current by down clocking the PWM clock frequency when the output voltage reaches a setpoint. This feature is useful in systems where power saving is important but the output voltage needs to remain stable.Overall, the RT8129AGQW is a high performance, integrated power solution for data centre and AC/DC regulation applications. It provides superior performance compared to other switches and is easier to manage with less external components. The PWM oscillator has a maximum clock frequency of 400kHz, thus providing excellent current limiter, thermal protection, over voltage protection and under voltage protection. The integrated power saving function allows designers to reduce the total quiescent current for improved power management and longer standby time.

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