Integrated Circuits (ICs)

MAX639EPA+

Obsolete

Analog Devices Inc./Maxim Integrated

5V/3.3V/3V ADJUSTABLE, HIGH-EFFICIENCY, LOW-IQ, STEP-DOWN DC-DC CONVERTERS

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Integrated Circuits (ICs)

MAX639EPA+

Obsolete

Analog Devices Inc./Maxim Integrated

5V/3.3V/3V ADJUSTABLE, HIGH-EFFICIENCY, LOW-IQ, STEP-DOWN DC-DC CONVERTERS

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	MAX639EPA+

Current - Output	225 mA
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	11.5 V
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Max) [Max]	11.5 V
Voltage - Output (Min/Fixed)	5 V
Voltage - Output (Min/Fixed) [Min]	1.3 V

MAX639 Series

Part	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Output Type	Output Configuration	Package / Case	Current - Output	Voltage - Output (Min/Fixed) [Min]	Voltage - Output (Min/Fixed)	Topology	Mounting Type	Voltage - Input (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Function	Number of Outputs	Package / Case	Package / Case
Analog Devices Inc./Maxim Integrated MAX639CPA+	11.5 V	4 V	Adjustable (Fixed)	Positive	8-DIP (0.300" 7.62mm)	225 mA	1.3 V	5 V	Buck	Through Hole	11.5 V	0 °C	70 °C	8-PDIP	Step-Down	1
Analog Devices Inc./Maxim Integrated MAX639ESA+T	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	-40 ¯C	85 C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639CSA+T	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	0 °C	70 °C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639CSA+	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	0 °C	70 °C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639ESA+	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	-40 ¯C	85 C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639CSA	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	0 °C	70 °C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639CPA	11.5 V	4 V	Adjustable (Fixed)	Positive	8-DIP (0.300" 7.62mm)	225 mA	1.3 V	5 V	Buck	Through Hole	11.5 V	0 °C	70 °C	8-PDIP	Step-Down	1
Analog Devices Inc./Maxim Integrated MAX639CSA-T	11.5 V	4 V	Adjustable (Fixed)	Positive	8-SOIC	225 mA	1.3 V	5 V	Buck	Surface Mount	11.5 V	0 °C	70 °C	8-SOIC	Step-Down	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated MAX639EPA+	11.5 V	4 V	Adjustable (Fixed)	Positive	8-DIP (0.300" 7.62mm)	225 mA	1.3 V	5 V	Buck	Through Hole	11.5 V	-40 ¯C	85 C	8-PDIP	Step-Down	1

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	23	$ 10.86
		8350	$ 10.86
	Tube	1	$ 12.99
		10	$ 9.18

Description

General part information

MAX639 Series

The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency at heavy loads), while using only 10µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.The MAX639/MAX640/MAX653 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 5V, 3.3V, and 3V, respectively. Or, the output can be user-adjusted to any voltage from 1.3V to the input voltage.The MAX639/MAX640/MAX653 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications. For increased output drive capability, use the MAX649/MAX651/MAX652 step-down controllers, which drive an external P-channel FET to deliver up to 5W.Applications5V to 3.3V Conversion9V Battery to 5V, 3.3V, or 3V ConversionHigh-Efficiency Linear Regulator ReplacementPortable Instruments and Handy-Terminals

Documents

Technical documentation and resources