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ADI ADP1871ACPZ-1.0-R7 product image
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ADI ADP1871ACPZ-1.0-R7

Manufacturer
ADI
MPN
ADP1871ACPZ-1.0-R7
LCSC Part #
C658994
Packaging
LFCSP-10(3x3)
Customer #
Key Attributes
Synchronous Buck Controller with Constant On-Time, Valley Current Mode, and Power Save Mode
Datasheetpdf iconADI ADP1871ACPZ-1.0-R7
RoHS Compliance1 documents available
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1+$ 1.8661$ 1.87
200+$ 0.7224$ 144.48
500+$ 0.6977$ 348.85
1,500+$ 0.6854$ 1028.10
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerADI
PackagingLFCSP-10(3x3)
Operating Temperature-40℃~+125℃@(TJ)
Synchronous RectifierYes
FeaturesAdjustable current limiting;Hiccup current limiting;Light load efficient mode;Built-in LDO regulator;Overcurrent Protection
Output Current-
Number of Channels1
TopologyBuck
Frequency - Switching1MHz
Operating Voltage3.25V~20V
Output TypeAdjustable
Switch tube (built-in/external)External
Output Voltage600mV~13V
FunctionStep-down type
Quiescent Current1.1mA
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Introduction

AI Translation

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 currentlimit, 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. 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 pulsewidth 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 a 10-lead MSOP and LFCSP packages.

Features

AI Translation
  • 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 (ADP1871 only)
  • 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 and LFCSP packages

Applications

AI Translation
  • Telecom and networking systems
  • Mid to high end servers
  • Set-top boxes
  • DSP core power supplies
  • 12 V input POL supplies