NCP133AMX105TCG

Voltage Dropout (Max):	0.25V @ 500mA
Supplier Device Package:	6-XDFN (1.2x1.2)
Package / Case:	6-XFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	80dB ~ 70dB (1kHz)
Current - Output:	500mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.05V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to NCP133AMX105TCGThe NCP133AMX105TCG is a series of medium current linear voltage regulators (PMIC- Voltage Regulators- Linear). It is a medium-voltage monolithic integrated voltage regulator circuit, designed in Bipolar technology. It’s main application field is in power supplies, battery chargers and other electronic circuits, where a medium current and voltage regulation is needed. The NCP133AMX105TCG series operates over an extended temperature range of -40°C to +85°C. It consists of an input, a feedback, and an output voltage. The circuit features with low dropout voltage, high precision and fast transient response. The P-Channel MOSFET is used for load current sinking. The high,med and low current is determined by external resistor. Working Principle of NCP133AMX105TCGWhen operating, the NCP133AMX105TCG takes a reference voltage indicative of the output voltage from the reference pin (pin1). The voltage on the reference pin (pin1) is then compared with a voltage, derived from a differential amplifier, that is indicative of the output voltage. The error signal is used to control the internal P-Channel MOSFET until the voltage on the output pin (pins 7 and 6) is equal to the reference voltage. The NCP133AMX105TCG series has two working models: Pulse Frequency Modulation (PFM) and Pulse duration Modulation (PDM). In the PFM mode, the NCP133AMX105TCG modulates the duty cycle and the switching frequency, according to the requested load. The frequency is increased for light load, and decreased for heavier load. In the PDM mode, the NCP133AMX105TCG modulates the duty cycle and keeps a constant switching frequency. PDM mode is known to induce a lower output noise levels than PFM mode, because the switching frequency is kept constant. During the P-Channel MOSFET switches off, the low sink current is off, and the output voltage is being sank to ground, creating a negative feedback.Pinout,Power Supply and OutputThe NCP133AMX105TCG has an 8-pin package and the pinout is described below. Pin No (1): Reference voltage Input; Pin No (2): Input voltage; Pin No (3,4): Ground; Pin No (5,6): Output voltage; Pin No (7): Feedback voltage; Pin No (8): P-Channel MOSFET. The input voltage for the NCP133AMX105TCG can range from 4V to 16V, and the maximum output voltage is determined by the external resistor. The maximum output voltage without the resistor can be up to 36V. Features & Characteristics of NCP133AMX105TCGThe NCP133AMX105TCG’s main feature is its low dropout voltage, which enables the circuit to operate properly even with very small input voltages. Combined with its high accuracy and fast transient response, the NCP133AMX105TCG offers excellent performance capabilities in short dimensions and low power consumption. Besides, the NCP133AMX105TCG offers high power levels, current and thermal control, automatic switching between the PFM and PDM modes and a high-temperature shutdown. Commonly Used ComponentsThe NCP133AMX105TCG usually used in combination with a Zener diode, voltage divider network and reference voltage. The Zener diode is used for voltage clamping protection, the voltage divider network is used for providing reference voltages, and the temperature detector is used for temperature sensing. ApplicationsThe NCP133AMX105TCG is suitable for voltage regulation in power supplies, battery chargers, mobile phones, automotive electronics, medical devices, instrumentation, programmable power supplies and system power supplies. It is also suitable for portable electronic products and battery powered applications, such as digital cameras and notebook computers.ConclusionThe NCP133AMX105TCG series is a medium current linear voltage regulators with low dropout voltage, high accuracy and fast transient response. It operates over an extended temperature range of -40°C to +85°C, with an input voltage ranging from 4V to 16V and a maximum output voltage of up to 36V. Its main application field is in power supplies, battery chargers and other electronic circuits. Combined with a Zener diode, voltage divider network and reference voltage, the NCP133AMX105TCG is used for voltage regulation in power supplies, battery chargers, mobile phones, automotive electronics, medical devices, instrumentation, programmable power supplies and system power supplies.

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