ADP1878
Info : RECOMMENDED FOR NEW DESIGNS
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ADP1878

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Models 3
1ku List Price
price unavailable
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 (ADP1879 only)
  • Resistor programmable current limit
  • Power good with internal pull-up resistor
  • Externally programmable soft-start
  • See data sheet for additional features
Additional Details
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The ADP1878 / ADP1879 are versatile current mode, synchronous step-down controllers. They 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 using a valley, current mode control architecture. This allows the ADP1878 / ADP1879 to drive all N-channel power stages to regulate output voltages to as low as 0.6 V.

The ADP1879 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 ADP1879 Power Saving Mode (PSM) section for more information).

Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz, plus the PSM option), the ADP1878 / ADP1879 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 low dropout regulator (LDO).

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

The ADP1878 / ADP1879 operate over the −40°C to +125°C junction temperature range and are available in a 14-Lead LFCSP_WD package.

APPLICATIONS

  • Telecom and networking systems
  • Mid to high-end servers
  • Set-top boxes
  • DSP core power supplies
Part Models 3
1ku List Price
price unavailable

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Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADP1878ACPZ-0.3-R7
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ADP1878ACPZ-0.6-R7
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ADP1878ACPZ-1.0-R7
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Part Models

Product Lifecycle

PCN

Oct 18, 2016

- 16_0036

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products

Aug 6, 2014

- 13_0230

Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China

Sep 10, 2019

- 19_0056

Obsolescence of ADP1878ACPZ-0.3-R7 / -0.6-R7 / -1.0-R7 and ADP1879ACPZ-0.3-R7 / -0.6-R7 / -1.0-R7

ADP1878ACPZ-0.3-R7

Obsolete

ADP1878ACPZ-0.6-R7

Obsolete

ADP1878ACPZ-1.0-R7

Obsolete

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 18, 2016

- 16_0036

arrow down

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products

Aug 6, 2014

- 13_0230

arrow down

Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China

Sep 10, 2019

- 19_0056

arrow down

Obsolescence of ADP1878ACPZ-0.3-R7 / -0.6-R7 / -1.0-R7 and ADP1879ACPZ-0.3-R7 / -0.6-R7 / -1.0-R7

ADP1878ACPZ-0.3-R7

Obsolete

ADP1878ACPZ-0.6-R7

Obsolete

ADP1878ACPZ-1.0-R7

Obsolete

Software & Part Ecosystem

Tools & Simulations 1

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