Analog Devices-DS1678+ Real Time Clocks Real Time Clock Serial 32byte Clock/Calendar/Alarm 8-Pin PDIP N Tube

MAX1649CPA+

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Analog Devices Inc./Maxim Integrated

DC/DC CNTRLR SINGLE-OUT STEP DOWN 300KHZ 8-PIN PDIP N TUBE

MAX1649CPA+

Active

Analog Devices Inc./Maxim Integrated

DC/DC CNTRLR SINGLE-OUT STEP DOWN 300KHZ 8-PIN PDIP N TUBE

Description Specifications Series Pricing CAD Documents

Description

General part information

MAX1649 Series

The MAX1649/MAX1651 BiCMOS, step-down, DC-DC switching controllers provide high efficiency over loads ranging from 1mA to more than 2.5A. A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using only 100µA of supply current (vs. 2mA to 10mA for PWM converters). Dropout performance down to 300mV is provided by a high switch duty cycle (96.5%) and a low current-sense threshold (110mV).A high switching frequency (up to 300kHz) allows these devices to use miniature external components.The MAX1649/MAX1651 have dropout voltages less than 0.3V at 500mA and accept input voltages up to 16V. Output voltages are preset at 5V (MAX1649), or 3.3V (MAX1651). They can also be adjusted to any voltage from 1.5V to the input voltage by using two resistors.These step-down controllers drive external P-channel MOSFETs at loads greater than 12.5W. If less power is required, use the MAX639/MAX640/MAX653 step-down converters with on-chip FETs, which allow up to a 225mA load current.Applications5V to 3.3V Green PC ApplicationsBattery-Powered ApplicationsHigh-Efficiency Step-Down RegulationPDAs

Technical Specifications

Parameters and characteristics for this part

Specification	MAX1649CPA+

Clock Sync	No
Control Features	Enable
Duty Cycle (Max)	96.5 %
Frequency - Switching (Max)	300 kHz
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package Length	0.3 in
Package Name	8-PDIP, 8-DIP
Package Width	7.62 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	16 V
Voltage - Supply (Vcc/Vdd) Minimum	3 V

MAX1649 Series

5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controller

Part	Operating Temperature (Min)	Operating Temperature (Max)	Package Length	Package Name	Package Width	Number of Outputs	Clock Sync	Frequency - Switching (Max)	Output Type	Output Phases	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Output Configuration	Control Features	Duty Cycle (Max)	Topology	Function	Mounting Type	Synchronous Rectifier	Board Type	Total Output Count	Non-Isolated Output Count	Supplied Contents	Contents	Regulator Topology	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Utilized IC / Part	Current - Output	Main Purpose	Voltage - Output
Analog Devices Inc./Maxim Integrated MAX1649CSA+	0 °C	70 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No
Analog Devices Inc./Maxim Integrated MAX1649EVKIT-SO+									Non-Isolated											Fully Populated	1	1 count	Board(s)	Board	Buck	5.5 V	16.5 V	MAX1649	1.5 A	DC/DC Step Down	5 VDC
Analog Devices Inc./Maxim Integrated MAX1649CSA	0 °C	70 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No
Analog Devices Inc./Maxim Integrated MAX1649ESA	-40 °C	85 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No
Analog Devices Inc./Maxim Integrated MAX1649CPA+	0 °C	70 °C	0.3 in	8-DIP 8-PDIP	7.62 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Through Hole	No
Analog Devices Inc./Maxim Integrated MAX1649ESA+T	-40 °C	85 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No
Analog Devices Inc./Maxim Integrated MAX1649CSA+T	0 °C	70 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No
Analog Devices Inc./Maxim Integrated MAX1649CPA	0 °C	70 °C	0.3 in	8-DIP 8-PDIP	7.62 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Through Hole	No
Analog Devices Inc./Maxim Integrated MAX1649ESA+	-40 °C	85 °C	0.154 in	8-SOIC	3.9 mm	1	No	300 kHz	Transistor Driver	1	3 V	16 V	Positive	Enable	96.5 %	Buck	Step-Down	Surface Mount	No

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

MAX1649-MAX1651: 5V/3.3V or Adjustable, High-Efficiency, Low-Dropout, Step-Down DC-DC Controller Data Sheet (Rev.3)

Datasheet

MAX1649CPA+ | Datasheet