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The LT7184SRV device is a dual-channel 9A, 16V multiphase step-down Silent Switcher 2 with digital power system management function.

Its main features include

Silent Switcher® 2 architecture: The LT7184SRV enables compact, efficient, and low EMI solutions

PMBus/I2C serial interface

Telemetry reads back include: VOUT, IOUT, VIN, chip grain temperature, and faults

Programmable voltage, current limiting, digital soft start/stop, sequencing, UV/OV, phase, frequency (up to 4MHz), loop compensation

Integrated EEPROM with fault event logs

The key parameters can be set by configuring resistors and can be operated without programming

The output voltage accuracy of the LT7184SRV across the entire temperature range is ±0.25% at voltages ranging from 0.6V to 1.375V

PolyPhase® load distribution with up to eight phases

Wide VIN range: up to 2.9V or 1.5V (up to 16V for EXTVCC)

1MHz, 12VIN to 3.3VOUT

VOUT range: 0.4V to 5.5V (up to 85% x VIN)

Differential remote VOUT detection

External frequency synchronization

36-pin (4mm x 5mm) LQFN package

Description of LT7184S

The LT7184SRV is a dual-output monolithic integrated multi-phase DC/DC synchronous step-down regulator that can simultaneously provide up to 7A of continuous current from two channels and support loads ranging from -8A to +9A in either channel. The LT7184SRV adopts the second-generation Silent Switcher® architecture with an integrated VIN bypass capacitor, which enables fast, clean and low overshoot switching edges, providing high efficiency at high switching frequencies while minimizing electromagnetic interference (EMI) radiation. The serial interface based on I2C and conforming to the PMBus 1.3 standard can control the device functions and provide telemetry information for system monitoring.

The LT7184SRV is supported by the LTpowerPlay® graphical user interface tool. The output voltage, frequency, phase and device address can be configured using resistors, and the operation can be carried out without programming. Settings can also be written through the serial interface and/or stored in the EEPROM. The controlled on-time valley current mode control architecture features a minimum on-time of 25ns (typical value), enabling high switching frequencies at low output voltages and excellent transient response within a relatively small overall solution size.

Target application

The LT7184SRV step-down voltage regulator is widely used in the following scenarios:

Communication, storage and industrial systems

Data center and solid-state drive power supplies

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