AP2200

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Up
Output Configuration:	Positive
Topology:	Boost
Output Type:	Programmable
Number of Outputs:	1
Voltage - Input (Min):	0.4V
Voltage - Input (Max):	1.6V
Voltage - Output (Min/Fixed):	4V, 5V
Voltage - Output (Max):	--
Current - Output:	50mA, 80mA
Frequency - Switching:	500kHz
Synchronous Rectifier:	Yes
Operating Temperature:	-30°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	16-UFQFN Exposed Pad
Supplier Device Package:	16-QFN (3x3)

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AP2200 Application Field and Working Principle

PMIC - Voltage Regulators - DC DC Switching Regulators

The AP2200 is a high performance DC-DC switching regulator from Anpec Electronics Corporation. It is a single chip solution pack integrating two buck type step down DC-DC regulator for general use. This product is much suited for use in applications that require high efficiency and low noise.

Application Fields

The AP2200 is suitable for applications such as notebook computers, portable media players, cellular phones, digital cameras and so on. It can provide a constant regulated output voltage in a small size, and it can also reduce noise and power dissipation. In addition, the AP2200 can be used to provide a special power supply for specific devices.

Features of AP2200

The AP2200 offers many features for a simple and convenient power supply design. It includes internal soft start and current limit circuit, output voltages up to 12V, input voltage range from 2.5V to 5.5V, and low quiescent current of 0.8mA. The AP2200 also has the abilities of frequency jitter, pulse-by-pulse current limit, and over current protection. It also has high value capacitors for further suppressing noise. The AP2200 is also available in a small package size of 28-pin SSOP (13.5mm x 9.75mm).

Working Principles of AP2200

The AP2200 uses a buck type DC-DC converter which is an inefficient switching regulator. The input voltage is supplied to the DC-DC converter and then stepped down to the output voltage. The DC-DC converter works on a principle known as Pulse Width Modulation (PWM) switching which generates high currents very quickly. This technique is used to reduce energy loss and obtain a high degree of switching efficiency.The AP2200 uses a combination of two buck type converters for its output. It has an external resistor divider to control its output voltage. One buck type converter is used to output a lower voltage, while the other buck type converter is used to output a higher voltage. The higher voltage output is used to provide the output voltage of the AP2200.In order to further ensure a low level of noise, the AP2200 also uses a high frequency capacitive filter. This helps to reduce any noise caused by the interference from other components. The AP2200 also has an internal current limit and an over current protection scheme to prevent overcharging.

Conclusion

The AP2200 is a high performance DC-DC switching regulator which is well suited for various applications. It can reduce noise and power dissipation while providing a constant regulated output voltage. It has a very easy to use design and offers many features such as frequency jitter, pulse-by-pulse current limit, and over current protection. The AP2200 uses a buck type DC-DC converter to step down the input voltage and an external resistor divider to control the output voltage. It also features a high frequency capacitive filter to reduce any noise caused by interference from other components.

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