ADP2323

Dual 3 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 90 mΩ typical high-side MOSFET Flexible output configuration Dual output: 3 A/3 A Parallel single output: 6 A Programmable switching frequency: 250 kHz 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 inductor External compensation and soft start Startup into precharged output Supported by ADIsimPower™ design tool RTOP1 CC1 RBOT1 RC1 FB1 COMP1 ADP2323 TYPICAL APPLICATION CIRCUIT VIN CSS1 SS1 PVIN1 BST1 EN1 CIN1 CBST1 L1 VOUT1 CINT INTVCC MODE SCFG TRK2 TRK1 VDRV GND PGOOD2 PGOOD1 SYNC COMP2 SW1 M1 DL1 COUT1 CDRV ADP2323 PGND DL2 M2 SW2 BST2 COUT2 PVIN2 RT FB2 EN2 SS2 APPLICATIONS Communications infrastructure Networking and servers Industrial and instrumentation Healthcare and medical Intermediate power rail conversion DC-to-dc point of load applications ROSC CBST2 L2 VOUT2 RC2 RBOT2 RTOP2 CC2 CSS2 CIN2 VIN 09357-001 Figure 1. GENERAL DESCRIPTION The ADP2323 is a full featured, dual output, step-down dc-todc regulator based on current-mode architecture. The ADP2323 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 3 A outputs or a parallel-to-single...