ADP2325 Datasheet | Analog Devices

Dual 5 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET Data Sheet Features Input voltage: 4.5 V to 20 V ±1% output accuracy Integrated 48 mΩ typical high-side MOSFET Flexible output configuration Dual output: 5 A/5 A Parallel single output: 10 A Programmable switching frequency: 250 k Hz to 1.2 MHz External synchronization input with programmable phase shift or internal clock output Selectable PWM or PFM mode operation Adjustable current limit for small inductors External pensation and soft start Startup into precharged output Supported by ADIsim Power TM design tool TYPICAL APPLICATION CIRCUIT RTOP1 CC1 CSS1 RC1 FB1 P1 SS1 EN1 PVIN1 BST1 CIN1 RBOT1 INTVCC MODE SCFG TRK2 TRK1 CDRV VDRV GND PGOOD2 P2 CBST1 L1 SW1 M1 DL1 COUT1 VOUT1 CINT PGND M2 DL2 SW2 PVIN2 BST2 EN2 COUT2 L2 VOUT2 SS2 FB2 PGOOD1 SYNC RT ROSC RBOT2 RTOP2 CBST2 APPLICATIONS munications infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion RC2 CC2 CSS2 CIN2 10036-001 Figure 1. GENERAL DESCRIPTION The ADP2325 is a full featured, dual output, step-down dc-to-dc regulator based on a current mode architecture. The ADP2325 integrates two high-side power MOSFETs and two low-side drivers for the external N-channel MOSFETs. The two pulse-width modulation (PWM) channels can be configured to deliver dual 5 A outputs or a parallel-to-single 10 A output. The regulator operates from input voltages of 4.5 V to 20 V, and the output voltage can be as low as 0.6 V. The switching frequency can be programmed from 250 k Hz to 1.2 MHz, or it can be synchronized to an external clock to minimize interference in multirail applications. The dual PWM channels run 180° out of phase, thereby reducing input current ripple as well as reducing the size of the input capacitor. The bidirectional synchronization pin can be programmed at a 60°, 90°, or 120° phase shift to provide for a...