TPS61201DRCT

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	TPS61201
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:	1.25MHz ~ 1.65MHz
Current - Output:	1.2A (Switch)
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	0.3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS61201DRCT Application Field and Working Principle

TPS61201DRCT is a small, low-cost, low-dropout (LDO) DC-DC switching regulator designed for space-restricted portable devices. It packs up to 99.4% peak efficiency along with very low quiescent current of only 6.3µA in light-load operation mode. The device draws only 9.5µA when the switch is off, so long life operation is easy to achieve in power-off conditions.The TPS61201DRCT features integrated internal termination resistors and low-side MOSFETs, so it requires only a small inductor and two external capacitors to make a complete DC-DC switching regulator circuit. The device has a wide input voltage range of 2.2 V to 5.5 V and its output voltage can be adjusted from 0.8 V to VOUT(max).The TPS61201DRCT’s externally adjustable oscillator frequency (safe-start frequency fixed at 300kHz) allows the designer to choose the inductor’s size, optimizing it for a given set of conditions. This, in turn, reduces cost and physical size of the component, allowing even smaller portable designs to realize efficiencies above 95%.The TPS61201DRCT is well suited for applications such as digital still cameras, PDAs, cell phone and PDA battery chargers, and PDAs.

*Application Field*

The TPS61201DRCT is ideal for applications such as portable products, digital still cameras, PDAs, cell phone and PDA battery chargers, and PDAs. With its ultra low quiescent current operation, high efficiency, and wide input voltage range, the TPS61201DRCT is an excellent choice for applications that require portability and superior design flexibility.

*Working Principle*

The TPS61201DRCT DC/DC switching regulator works by drawing energy from an input voltage, converting it to a lower voltage, and then regulating that output voltage to a predetermined setting.The switching regulator consists of an inductor, a capacitor, and an output transistor connected to the input voltage and the output voltage. The inductor stores energy from the input and releases it to the output, and the capacitor smoothes any voltage ripples. The output transistor switches the inductor current on and off, thus controlling the output voltage.The TPS61201DRCT switching regulator uses pulse-width modulation (PWM) to control the output voltage. The chip has an internal oscillator that creates the switching noise and a duty-cycle control block that creates the PWM signal. The duty cycle is the percentage of time that the output transistor is turned on versus off. This duty cycle control is achieved with two bits of the converter’s control logic. One bit controls the converter’s power-on (full load) performance, while the other bit controls the device’s quiescent current in light load condition.By varying the duty cycle of the output voltage, the device can regulate the output voltage to a desired level. The switch is turned on and off quickly in order to achieve the desired duty cycle, thus creating the switching noise in the system. This switching noise must be effectively reduced in order to optimize system performance. The TPS61201DRCT switching regulator is designed to reduce the output voltage noise as much as possible in order to maintain high efficiency.The output voltage is determined by the input voltage, the duty cycle of the output voltage, and the output transistor. Typically, the output transistor in the TPS61201DRCT converter is designed to reach a regulated state. This regulated state is achieved by using an external cycle-by-cycle current-sensing resistor. This current-sensing resistor helps to regulate the output voltage across a wide range of input voltages. In conclusion, the TPS61201DRCT is a powerful and efficient DC-DC switching regulator that can be used in a wide range of portable applications. With its integrated internal termination resistors and low-side MOSFETs, it can achieve up to 99.4% peak efficiency along with very low quiescent current. Its adjustable oscillator frequency allows the designer to optimize the inductor’s size for a given set of conditions. Its wide input voltage range and adjustable output voltage make it suitable for applications from digital still cameras, PDAs, and cell phone/PDA battery chargers.

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