ADP1871
Info : RECOMMENDED FOR NEW DESIGNS
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ADP1871

Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Save Mode

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $1.16
Features
  • Power input voltage range: 2.95 V to 20 V
  • On-board bias regulator
  • Minimum output voltage: 0.6 V
  • 0.6 V reference voltage with ±1.0% accuracy
  • Supports all N-channel MOSFET power stages
  • Available in 300 kHz, 600 KHz, and 1.0 MHz options
  • No current-sense resistor required
  • Power saving mode (PSM) for light loads
  • Resistor-programmable current-sense gain
  • Thermal overload protection
  • Short-circuit protection
  • Precision enable input
  • Integrated bootstrap diode for high-side drive
  • Starts into a precharged load
  • Small, 10-lead MSOP package
Additional Details
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The ADP1870 / ADP1871 are versatile current-mode, synchronous step-down controllers that provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo-fixed frequency with a programmable current-limit, current-control scheme. In addition, these devices offer optimum performance at low duty cycles by utilizing valley current-mode control architecture. This allows the ADP1870 / ADP1871 to drive all N-channel power stages to regulate output voltages as low as 0.6 V.

The ADP1871 is the power saving mode (PSM) version of the device and is capable of pulse skipping to maintain output regulation while achieving improved system efficiency at light loads (see the Power Saving Mode (PSM) Version (ADP1871) section for more information).

Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz, plus the PSM option), the ADP1870 / ADP1871 are well suited for a wide range of applications that require a single-input power supply range from 2.95 V to 20 V. Low voltage biasing is supplied via a 5 V internal LDO.

In addition, an internally fixed soft start period is included to limit input in-rush current from the input supply during startup and to provide reverse current protection during soft start for a precharged output. The low-side current-sense, current-gain scheme and integration of a boost diode, along with the PSM/forced pulse-width modulation (PWM) option, reduce the external part count and improve efficiency.

The ADP1870/ADP1871 operate over the -40°C to +125°C junction temperature range and are available in 10-lead MSOP package.

APPLICATIONS

  • Telecom and networking systems
  • Mid to high end servers
  • Set-top boxes
  • DSP core power supplies
  • 12 V input POL supplies
Part Models 6
1ku List Price Starting From $1.16

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADP1871ACPZ-0.3-R7
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ADP1871ACPZ-0.6-R7
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ADP1871ACPZ-1.0-R7
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ADP1871ARMZ-0.3-R7
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ADP1871ARMZ-0.6-R7
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ADP1871ARMZ-1.0-R7
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Product Lifecycle

PCN

Aug 6, 2014

- 13_0223

Assembly and Test Transfer of Select 2x3mm and 3x3mm LFCSP Products to STATS ChipPAC China

Jan 26, 2016

- 15_0176

Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines

May 15, 2012

- 10_0006

Halogen Free Material Change for mini SOIC Products

ADP1871ARMZ-0.3-R7

PRODUCTION

ADP1871ARMZ-0.6-R7

PRODUCTION

ADP1871ARMZ-1.0-R7

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 6, 2014

- 13_0223

arrow down

Assembly and Test Transfer of Select 2x3mm and 3x3mm LFCSP Products to STATS ChipPAC China

Jan 26, 2016

- 15_0176

arrow down

Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines

May 15, 2012

- 10_0006

arrow down

Halogen Free Material Change for mini SOIC Products

ADP1871ARMZ-0.3-R7

PRODUCTION

ADP1871ARMZ-0.6-R7

PRODUCTION

ADP1871ARMZ-1.0-R7

PRODUCTION

Software and Part Ecosystem

Software and Part Ecosystem

Tools & Simulations

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