ADP1876

PRODUCTION

600 kHz Dual Output Synchronous Buck PWM Controller Plus Linear Regulator

Data Sheet (Rev. B) Product Selection Table

Part Models: 1
1ku List Price: Starting From $2.02

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Overview

Wide input range: 2.75 V to 20 V
Power stage input voltage: 1 V to 20 V
Output voltage range: 0.6 V up to 90% V_IN
Linear dropout (LDO) regulator with a fixed output 1.5 V at 150 mA
Output current more than 25 A per channel
180º phase shift between channels for reduced input capacitance
±0.85% reference voltage accuracy from −40°C to +85°C
Integrated boost diodes
Independent channel precision enable
Overcurrent limit protection
Externally programmable soft start, slope compensation, and current sense gain
Thermal overload protection
Input undervoltage lockout (UVLO)
Power good with internal pull-up resistor
Available in 32-lead, 5 mm × 5 mm LFCSP

The ADP1876 is a dual output dc-to-dc synchronous buck controller operating at 600 kHz fixed frequency with integrated drivers that drive N-channel power MOSFETs. An additional fixed voltage output, 150 mA linear regulator is available for powering low power loads. The device operates in current mode for improved transient response and uses valley current sensing for enhanced noise immunity. The two PWM outputs are phase shifted 180° for reducing the input current ripple and the required input capacitance.

The ADP1876 provides high speed, high peak current drive capability with dead time optimization to enable energy efficient power conversion.

Additional flexibility is provided by external programmability of loop compensation, soft start, current limit and current sense gain can all be programmed using external components. The ADP1876 has integrated boost diodes and power good. Protection features include under-voltage lock-out, over-current/short-circuit and over temperature. The ADP1876 provides an output voltage accuracy of ±0.85% from −40°C to +85°C and ±1.5% from −40°C to 125°C in junction temperature. This part can be powered from a 2.75 V to 20 V supply, operates over the −40°C to +125°C junction temperature range, and is available in a 32-lead 5 mm × 5 mm LFCSP package.

Applications

Consumer applications
Telecommunications base station and networking
Industrial and instrumentation

Part Models: 1
1ku List Price: Starting From $2.02

Documentation

Data Sheet 1

ADP1876: 600 kHz Dual Output Synchronous Buck PWM Controller with Linear Regulator (Rev.B) 09/27/2011

User Guide 1

UG-334: Evaluation Board for the ADP1876 Step-Down DC-to-DC Controller 11/09/2011

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADP1876ACPZ-R7	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 6, 2017 - 16_0234 Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts.
		PCN16_0234_Form Material_Report Detailed Change Description Detailed Change Description Qualification Results Summary Test Correlation Report
ADP1876ACPZ-R7	Obsolete
Aug 6, 2014 - 13_0230 Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China
		PCN13_0230_Form Material_Report Detailed Change Description Qualification Results Summary Test Correlation Report
ADP1876ACPZ-R7	Obsolete
Feb 20, 2025 - 24_0104 Obsolescence of ADP1876
		PDN24_0104_Form Material_Report
ADP1876ACPZ-R7	Obsolete	PDN24_0104_Form Material_Report

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

ADP187x Buck Designer Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Open Tool

ADI Linear Regulator Design Tool and Parametric Search

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Open Tool

Evaluation Kits

ADP1876 Evaluation Board

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Features and Benefits

Input range: 10 V to 20 V
Two output voltages: 5 V and 1.8 V
Output current: 13 A per channel
Switching frequency: 600 kHz
Operates in PWM
Compact, low cost, and efficient design

Product Details

The ADP1876 is a dual-channel, step-down switching controller with integrated drivers for external N-channel synchronous power MOSFETs. The two PWM outputs are phase shifted 180°, which reduces the input rms ripple current, thus minimizing the required input capacitance.

In addition, boost diodes are integrated into the ADP1876, which lowers the overall system cost and component count. The ADP1876 is configured to operate in forced PWM continuous conduction mode.

The ADP1876 includes externally adjustable soft start, output overvoltage protection, externally adjustable current limit, power good and tracking function for Channel 1. The ADP1876 provides an output voltage accuracy of ±0.85% for a −40°C to +85°C junction temperature and ±1.5% for a −40°C to +125°C junction temperature. This controller can be powered from a 2.75 V to 20 V supply and is available in a 32-lead, 5 mm × 5 mm lead frame chip scale package (LFCSP).

Resources

UG-334: Evaluation Board for the ADP1876 Step-Down DC-to-DC Controller
11/9/2011

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