MP2155GQ-P

Voltage - Input (Max):	5.5V
Supplier Device Package:	10-QFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	1A, 2.2A
Voltage - Output (Max):	5V
Voltage - Output (Min/Fixed):	1.5V (3.3V)
Series:	--
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Adjustable (Fixed)
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MP2155GQ-P Application Field and Working Principle

The MP2155GQ-P is an energy-efficient synchronous step-down DC/DC controller that includes one low side power switch, one high side power switch, and a current-mode PWM controller. Designed for a wide variety of applications, it is specifically tailored for battery-powered portable applications, where high efficiency and low power-consumption are key design considerations.

Application Field

The MP2155GQ-P is designed to support a wide variety of applications, from mobile phones and media players to routers and industrial controllers. It is specifically designed for battery powered, portable applications, where high efficiency and low power consumption are key design considerations.The MP2155GQ-P offers an integrated power management architecture with an adjustable output voltage, current-mode PWM controller and a wide input voltage range of 3.5V to 28V. This allows the device to be used in a variety of applications, such as low-power portable systems, automotive lighting and instrumentation, home theatre systems, industrial controllers, and communications equipment.

Working Principle

The MP2155GQ-P is a synchronous step-down DC/DC controller that includes one low side power switch, one high side power switch, and a current-mode PWM controller. The current mode PWM controller includes a 4-bit resolution programmable soft-start, temperature compensation, and short circuit protection with auto-restart.The MP2155GQ-P also incorporates several features to ensure high efficiency in a variety of operating conditions: an output voltage tracker, a frequency tracker, and a power-limit comparator. The output voltage tracker tracks the output voltage and adjusts the step-down ratio to maintain a constant output voltage with varying line inputs. The frequency tracker adjusts the internal oscillator frequency to provide the most efficient operating frequency for the given input voltage. Finally, the power-limit comparator monitors the output power and limits it to the defined value to maintain an ultra-low I2R loss and high efficiency.The MP2155GQ-P also features an adjustable output voltage within a range of 0.6V to 1.8V and can operate over a wide input voltage range of 3.5V to 28V. It has an adjustable switching frequency up to 1MHz, allowing for small inductor size and low external component count. The device also includes over-voltage protection and cycle-by-cycle current limit protection to avoid over-current issues.A key advantage of the MP2155GQ-P is its low power consumption. When the output voltage is lower than the input voltage, the low quiescent current of 10 μA eliminates the need for an external shutdown mode for power-saving modes. The MP2155GQ-P also supports dimming and pulse-skipping modes to allow for further power savings.Overall, the MP2155GQ-P is an energy-efficient, cost-effective solution for a wide variety of power-saving applications, making it an ideal choice for battery-powered portable and industrial applications.

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