ADP1829 Datasheet | Analog Devices

Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking ADP1829 .. Features Fixed frequency operation: 300 k Hz, 600 k Hz, or synchronized operation up to 1 MHz Supply input range: 3.0 V to 18 V Wide power stage input range: 1 V to 24 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 VIN = 12V 180µF TYPICAL APPLICATION CIRCUIT 180µF 1µF PV IN TRK1 TRK2 VREG BST1 DH1 EN1 EN2 BST2 DH2 0.47µF IRLR7807Z 1.2V, 6A 0.47µF IRLR7807Z 1.8V, 8A 2.2µH SW1 2kΩ SW2 CSL2 DL2 PGND2 PGND1 FB1 390p F 2kΩ FB2 390p F 1kΩ IRFR3709Z 2kΩ 2.2µH 560µF 2kΩ IRFR3709Z CSL1 DL1 560µF 2kΩ P2 P1 FREQ 4.53kΩ 3900p F LDOSD GND SYNC 3900p F 4.53kΩ APPLICATIONS Telemunications and networking systems Medical imaging systems Base station power Set-top boxes Printers DDR termination Figure 1. GENERAL DESCRIPTION The ADP1829 is a versatile, dual, interleaved, synchronous PWM buck controller that generates two independent output rails from an input of 3.0 V to 18 V, with power input voltage ranging from 1.0 V to 24 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 point-of-load regulators. The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, low cost ponents. The ADP1829 is ideal for a wide range of high power applications, such as DSP and processor core I/O power, and general-purpose power in telemunications, medical imaging, PC, gaming, and industrial applications. The...