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 between 250 kHz and 1.2 MHz, or 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, providing the possibility for a stackable multiphase power solution.
The ADP2325 can be set to operate in pulse frequency modulation (PFM) mode at a light load for higher efficiency or in forced PWM for noise sensitive applications. External compensation and soft start provide design flexibility. Independent enable inputs and power-good outputs provide reliable power sequencing.
To enhance system reliability, the device includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection, and thermal shutdown.
The ADP2325 operates over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP_WQ package.
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|ADP2325: Dual 5 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET Data Sheet (Rev A, 07/2012) (pdf, 846 kB)||Data Sheets|
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|UG-374: Evaluation Board for the ADP2325, Dual 5 A, 20 V, Synchronous Step-Down Regulator with Integrated High-Side MOSFET (pdf, 708 kB)||User Guides|
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ADP232x Buck Regulator Design Tool
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Evaluation board for evaluating ADP2325
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