Analog Devices ADP1821ARQZ-R7

ADP1821 Buck Tape & Reel (TR) e3 DC to DC switching controller 2mA 10muA 4.9022mm 4.675V

DC DC Cntrlr Dual-OUT Sync Buck 1V to 24V Input 16-Pin QSOP T/R

PWM Controller IC; Controller Type:PWM; Input Voltage Primary Max:24V; Output Voltage Max:20.4V; Output Type:Open-Drain; Input Current:10µA; Frequency:1.2MHz; Supply Voltage Min:3.7V; Termination Type:SMD; No. of Pins:16 ;RoHS Compliant: Yes

DC/DC CONV, STEP DOWN, 1~24V, 16QSOP; Primary Input Voltage:5.5V; No. of Outputs:1; Output Voltage:4.675V; Voltage Regulator Case Style:QSOP; No. of Pins:16; Operating Temperature Range:-40°C to +85°C; SVHC:No SVHC (19-Dec-2011); Accuracy %:1%; Adjustable Output Voltage Max:20.4V; Adjustable Output Voltage Min:0.6V; Base Number:1821; Frequency:1.2MHz; Input Voltage Max:24V; Output Voltage Max:20.4V; Package / Case:QSOP; Supply Voltage Max:5.5V; Supply Voltage Min:3.7V; Supply Voltage Typ:5V; Termination Type:SMD; Voltage Regulator Type:Step Down

The ADP1821 is a versatile and inexpensive, synchronous, pulse-width-modulated (PWM), voltage-mode, step-down controller. It drives an all N-channel power stage to regulate an output voltage as low as 0.6 V. The ADP1821 can be configured to provide output voltages from 0.6 V to 85% of the input voltage and is sized to handle large MOSFETs for point-of-load regulators. The ADP1821 is well suited for a wide range of high power applications, such as DSP and processor core power in telecommunications, medical imaging, high performance servers, and industrial applications. It operates from a 3.7 V to 5.5 V supply with a power input voltage ranging from 1.0 V to 24 V. The ADP1821 operates at a pin-selectable, fixed switching frequency of either 300 kHz or 600 kHz, minimizing external component size and cost. For noise sensitive applications, it can be synchronized to an external clock to achieve switching frequencies between 300 kHz and 1.2 MHz. The ADP1821 includes soft start protection to limit the inrush current from the input supply during startup, reverse current protection during soft start for precharged outputs, as well as a unique adjustable lossless current-limit scheme utilizing external MOSFET sensing. The ADP1821 operates over the –40°C to +125°C junction temperature range and is available in a 16-lead QSOP. Applications Telecommunications and networking systems Set-top boxes Printers Servers Medical imaging systems Microprocessor and DSP core power supplies Mobile communication base stations Data Sheet, Rev. C, 4/07