Analog Devices ADP2323

Description

The ADP2323 is a full featured, dual output, step-down dc-to-dc 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 mod-ulation (PWM) channels can be configured to deliver dual 3 A outputs or a parallel-to-single 6 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 ADP2323 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 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent pro-tection (OCP), and thermal shutdown (TSD).The ADP2323 operates over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP_WQ package.

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

Typical applications

• Healthcare and medical
• Communications infrastructure
• Industrial and instrumentation
• Intermediate power rail conversion
• DC-to-dc point of load applications
• Networking and servers

More information

• Datasheet
• IC product information