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ADP1823

Analog Devices
Part Number ADP1823
Manufacturer Analog Devices
Description Step-Down DC-to-DC Controller
Published Jan 14, 2007
Detailed Description www.DataSheet4U.com Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking ADP1823 FEATURES Fixed-frequency ope...
Datasheet PDF File ADP1823 PDF File

ADP1823
ADP1823

Overview
www.
DataSheet4U.
com Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking ADP1823 FEATURES Fixed-frequency operation: 300 kHz, 600 kHz, or synchronized operation up to 1 MHz Supply input range: 2.
9 V to 20 V Interleaved operation results in smaller, low cost input capacitor All-N-channel MOSFET design for low cost ±0.
85% accuracy at 0°C to 70°C Soft start, thermal overload, current-limit protection 10 μA shutdown supply current Internal linear regulator Lossless RDSON current-limit sensing Reverse current protection during soft start for handling precharged outputs Independent Power OK outputs Voltage tracking for sequencing or DDR termination Available in 5 mm × 5 mm, 32-lead LFCSP 180µF 1µF PV IN TRK1 TRK2 VREG BST1 DH1 EN1 EN2 TYPICAL APPLICATION CIRCUIT IN = 12V 180µF BST2 DH2 0.
47µF IRLR7807Z 1.
2V, 6A 0.
47µF IRLR7807Z 1.
8V, 8A ADP1823 2.
2µH SW1 2kΩ SW2 CSL2 DL2 PGND2 PGND1 FB1 390pF 2kΩ COMP1 FREQ 4.
53kΩ 3900pF GND LDOSD SYNC 3900pF 4.
53kΩ FB2 390pF 1kΩ IRFR3709Z 2kΩ 2.
2µH 560µF 2kΩ IRFR3709Z CSL1 DL1 560µF 2kΩ COMP2 APPLICATIONS Telecommunications and networking systems Medical imaging systems Base station power Set-top boxes Printers DDR termination Figure 1.
Typical Application Circuit GENERAL DESCRIPTION The ADP1823 is a versatile, dual, interleaved, synchronous PWM buck controller that generates two independent output rails from an input of 2.
9 V to 20 V.
Each controller 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 pointof-load regulators.
The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, low cost components.
The ADP1823 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.
The ADP1823 operates at a pin-selectable, fixed switching frequency of either 300 k...


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