Analog Devices Inc. ADP1828YRQZ-R7

DC DC Cntrlr Single-OUT Step Down 1V to 24V Input 20-Pin QSOP T/R
Controller IC; Controller Type:PWM; Input Voltage Primary Max:18V; Output Voltage Max:15.3V; Output Type:Voltage; Input Current:1.5mA; Frequency:600kHz; Supply Voltage Min:3V; Termination Type:SMD; No. of Pins:20 ;RoHS Compliant: Yes
DC/DC CONTROLLER, STEP DOWN, 20QSOP; Primary Input Voltage:20V; No. of Outputs:1; Voltage Regulator Case Style:QSOP; No. of Pins:20; Operating Temperature Range:-40°C to 125°C; SVHC:No SVHC (19-Dec-2011); Accuracy %:0.85%; Adjustable Output Voltage Min:0.6V; Base Number:1828; Frequency:600kHz; Input Voltage Max:18V; Input Voltage Min:5.5V; Operating Temperature Max:85°C; Operating Temperature Min:-40°C; Output Current Max:100mA; Output Voltage Max:5V; Package / Case:QSOP; Supply Voltage Max:18V; Supply Voltage Min:3V; Termination Type:SMD; Voltage Regulator Type:Step Down
The ADP1828 is a versatile and synchronous PWM voltage mode buck controller. It drives an all N-channel power stage to regulate an output voltage as low as 0.6 V to 85% of the input voltage and is sized to handle large MOSFETs for point-of-load regulators. The ADP1828 is ideal for a wide range of high power applications, such as DSP and processor core I/O power, and general-purpose power in telecommunications, medical imaging, PC, gaming, and industrial applications. It operates from input bias voltages of 3 V to 20 V with an internal LDO that generates a 5 V output for input bias voltages greater than 5.5 V. The ADP1828 operates at a pin-selectable, fixed switching frequency of either 300 kHz or 600 kHz, or at any frequency between 300 kHz and 600 kHz with a resistor. The switching frequency can also be synchronized to an external clock up to 2× the part’s nominal oscillator frequency. The clock output can be used for synchronizing additional ADP1828s (or the ADP1829 controllers), thus eliminating the need for an external clock source. The ADP1828 includes soft start protection to limit any inrush current from the input supply during startup, reverse current protection during soft start for a precharged output, as well as a unique adjustable lossless current-limit scheme utilizing external MOSFET RDSONsensing. For applications requiring power-supply sequencing, the ADP1828 provides a tracking input that allows the output voltage to track during startup, shutdown, and faults. The additional supervisory and control features include thermal overload, undervoltage lockout, and power good. The ADP1828 operates over the -40°C to 125°C junction temperature range and is available in a 20-lead QSOP. Applications Telecom and networking systems Base station power Set-top boxes, game consoles Printers and copiers Medical imaging systems DSP and microprocessor core power supplies DDR termination