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Analog Devices ADP1850

Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller

Overview

TopologyBuck Converter
Input voltage10-18 V
Switching frequency200-1500 kHz
Output 11.8 V / 5 A
IC revisionC

Description

The ADP1850 is a configurable dual output or two-phase, single output dc-to-dc synchronous buck controller capable of running from commonly used 3.3 V to 12 V (up to 20 V) voltage inputs. The device operates in current mode for improved transient response and uses valley current sensing for enhanced noise immunity.The architecture enables accurate current sharing between interleaved phases for high current outputs.The ADP1850 is ideal in system applications requiring multiple output voltages: the ADP1850 includes a synchronization fea-ture to eliminate beat frequencies between switching devices; provides accurate tracking capability between supplies and includes precision enable for simple, robust sequencing.

Features

Wide range input: 2.75 V to 20 VPower stage input voltage: 1 V to 20 VOutput voltage range: 0.6 V up to 90% VINOutput current to more than 25 A per channelAccurate current sharing between channels (interleaved)Programmable frequency: 200 kHz to 1.5 MHz180° phase shift between channels for reduced input capacitance±0.85% reference voltage accuracy from −40°C to +85°CIntegrated boost diodesPower saving mode (PSM) at light loadsAccurate power good with internal pull-up resistorAccurate voltage tracking capabilityIndependent channel precision enableOvervoltage and overcurrent limit protectionExternally programmable soft start, slope compensation and current sense gainSynchronization inputThermal overload protectionInput undervoltage lockout (UVLO)Available in 32-lead 5 mm × 5 mm LFCSP

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