Description

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 thedevice and is capable of pulse skipping to maintain outputregulation while achieving improved system efficiency at lightloads (see the ADP1879 Power Saving Mode (PSM) section formore information).Available in three frequency options (300 kHz, 600 kHz, and1.0 MHz, plus the PSM option), the ADP1878 / ADP1879 are wellsuited for a wide range of applications that require a single-inputpower supply range from 2.95 V to 20 V. Low voltage biasing issupplied via a 5 V internal low dropout regulator (LDO).In addition, soft start, programmability is included to limitinput in-rush current from the input supply during startup andto provide reverse current protection during precharged outputconditions. The low-side current sense, current gain scheme andintegration of a boost diode, along with the PSM/forced pulsewidthmodulation (PWM) option, reduce the external part countand improve efficiency.The ADP1878 / ADP1879 operate over the ?40?C to +125?Cjunction temperature range and are available in a 14-LeadLFCSP_WD package.APPLICATIONS Telecom and networking systems Mid to high-end servers Set-top boxes DSP core power supplies

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Part number: ADP1878-0.6-EVALZ

More details from Analog Devices Inc.