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Analog Devices ADP1871ARMZ-0.3-R7 — Discrete Semiconductors
Analog Devices

ADP1871ARMZ-0.3-R7 Buck Controller, 300kHz, 10-MSOP

MPNADP1871ARMZ-0.3-R7
End of Life

Analog Devices ADP1871ARMZ-0.3-R7, step-down buck controller, 300kHz switching frequency, single output, synchronous rectification, 2.95V to 20V supply, -40°C to 125°C, 10-MSOP package.

$3.93Ref. price · indicative, final on quote
ADP1871ARMZ-0.3-R7 datasheet
Packaging10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

ADP1871ARMZ-0.3-R7 Technical Specifications
ParameterValue
Output typeTransistor Driver
Mounting typeSurface Mount
Voltage - supply (Vcc (Vdd))2.95V ~ 20V
Frequency300kHz
Number of outputs1
Output phases1
Duty cycle84%
Operating temperature-40°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Clock syncNo
Case10-TFSOP, 10-MSOP (0.118\", 3.00mm Width)
Control featuresEnable
Output configurationPositive
Synchronous rectifierYes

Product details

300 kHz synchronous buck controller for intermediate bus and point-of-load rails

Rated for junction temperatures from -40°C to 125°C, it suits automotive under-hood, industrial motor drives, and outdoor telecom equipment where ambient heat spikes. The 10-MSOP package keeps the footprint small for space-constrained power stages.

Switching frequency and duty cycle — what they mean for the power stage

The 300 kHz switching frequency sets the inductor ripple current and output capacitor ripple voltage. The maximum duty cycle of 84% limits the input-to-output step-down ratio. Synchronous rectification improves efficiency at heavy loads by replacing the freewheeling diode with a low-Rds(on) MOSFET. The controller includes an enable pin for sequencing and on/off control.

Package and mounting

Housed in a 10-lead MSOP with 0.118-inch body width (3.00 mm), the ADP1871ARMZ-0.3-R7 is a surface-mount device. The supplier device package is 10-MSOP. Tape & Reel and Cut Tape options are available for the -R7 suffix.

Lifecycle and sourcing

It is ROHS3 compliant.

Frequently asked questions

What is the switching frequency of ADP1871ARMZ-0.3-R7?

The switching frequency is 300 kHz. This is the fixed oscillator rate; the part does not support clock synchronization.

What is the equivalent of ADP1871ARMZ-0.3-R7?

The closest functional peer is the ADP1873ARMZ-0.3-R7, which shares the same 300 kHz switching frequency, 84% duty cycle, synchronous rectification, and 10-MSOP package. The ADP1873 has a slightly lower minimum supply voltage (2.75 V vs 2.95 V). For a higher-frequency alternative, the ADP1883ARMZ-0.6-R7 switches at 600 kHz but has a lower 65% duty cycle.

What is ADP1871ARMZ-0.3-R7's listed function?

The function is Step-Down (buck) DC-DC controller. It drives external N-channel MOSFETs in a synchronous rectifier configuration to produce a regulated positive output voltage lower than the input.