MAX634EPA

Voltage - Output (Min/Fixed):	-2.6V
Base Part Number:	MAX634
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	100Hz ~ 75kHz
Current - Output:	150mA
Voltage - Output (Max):	-20V
Series:	--
Voltage - Input (Max):	16.5V
Voltage - Input (Min):	2.6V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck-Boost
Output Configuration:	Negative
Function:	Step-Up/Step-Down
Part Status:	Obsolete
Packaging:	Tube

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MAX634EPA Application Field and Working Principle

MAX634EPA, an Ultra-Low Noise charge pump DC/DC converter, is a positive polarity non-synchronous buck-boost regulator. It is part of a wide range of DC/DC converters under the category Low Voltage, High Efficiency DC/DC Converters. This device is part of the PMIC - Voltage Regulators - DC DC Switching Regulators category as it is a step-up/step-down switch-mode voltage regulator.The MAX634EPA is designed to provide a regulated output voltage down to 0.63 volts. It features extremely low noise, low output ripple, and wide input voltage range that is suitable for systems which require a precise voltage regulation and fast transient response. The MAX634EPA is a highly efficient device, offering up to 88% efficiency and low quiescent current in a 3 mm2 die size.The MAX634EPA is a two-stage boost/buck regulator designed to deliver a regulated output voltage while consuming one of two power sources. The first stage, referred to as "Boost Mode", is a pulse-width-modulated switch-mode regulator that receives a power input from either a battery or an external power supply. This voltage is then increased, supplying the second stage of the regulator, the "Buck Mode". Here the voltage is regulated to the desired output value. The internal clock of the MAX634EPA permits a high output frequency of 2.5 MHz for low ripple, low EMI and good light-load efficiency. The output voltage range is programmable within the range of 0.63V to 6V. External resistors can be used to double the range extending it from 0.36V to 12V. The MAX634EPA also features an enable pin, a soft start pin, a power good pin and an internal driver that provides fast high frequency load transients.In conclusion, the MAX634EPA is an Ultra-Low Noise charge pump DC/DC converter which is part of the PMIC - Voltage Regulators - DC DC Switching Regulators category and is designed to offer extremely low noise, low output ripple, and wide input voltage range suitable for precise voltage regulation. The internal clock of the MAX634EPA permits a high output frequency and the output voltage range is programmable within the range of 0.63V to 6V.

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