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Analog Devices MAX1771CSA+ — Discrete Semiconductors

Analog Devices MAX1771CSA+ Boost/Buck-Boost Controller

MPNMAX1771CSA+
End of Life

Analog Devices MAX1771CSA+ step-up/step-down DC-DC controller, 300kHz switching, 92% max duty cycle, 8-SOIC, tube.

$6.07Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX1771CSA+ specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))3V ~ 16.5V
Frequency300kHz
I/O channels1
Output phases1
Duty cycle92%
Operating temperature0°C ~ 70°C (TA)
PackageTube
FunctionStep-Up, Step-Up/Step-Down
TopologyBoost, Buck-Boost
Clock syncNo
Case8-SOIC (0.154\", 3.90mm Width)
Control featuresEnable
Output configurationPositive
Synchronous rectifierNo

Product details

Boost and buck-boost controller with 300 kHz switching

The MAX1771CSA+ from Analog Devices is a current-mode PWM controller configurable for boost or buck-boost topologies, switching at 300 kHz with a maximum duty cycle of 92%. It accepts a supply voltage from 3 V to 16.5 V, making it suitable for battery-powered or multi-rail systems where the input varies.

Single-output transistor driver with enable control

The controller drives an external N-channel MOSFET via a single transistor-driver output, configured for positive output voltage. An enable pin allows the regulator to be shut down without removing the input supply. No synchronous rectifier is built in, so the external diode and FET selection govern the efficiency at high step-up ratios.

8-SOIC surface-mount package, tube delivery

The surface-mount footprint mates with standard SOIC-8 land patterns and is compatible with reflow soldering profiles typical of mixed-signal boards.

Frequently asked questions

What is MAX1771CSA+'s function and topology?

The MAX1771CSA+ is a step-up/step-down DC-DC controller supporting boost and buck-boost topologies. It switches at 300 kHz with a 92% maximum duty cycle and operates from a 3 V to 16.5 V supply.

What package does the MAX1771CSA+ come in?

The MAX1771CSA+ is supplied in an 8-pin SOIC package (8-SOIC, 0.154" width, 3.90 mm body) in tubes.