Analog Devices Inc. LT7184S Silent Switcher® 2 Step-Down Regulators
Analog Devices LT7184S Silent Switcher® 2 Step-Down Regulators are dual-output monolithic PolyPhase DC/DC synchronous step-down regulators that deliver up to 7A of continuous current from both channels simultaneously and support loads from -8A to +9A in either channel. The LT7184S features second-generation Silent Switcher architecture with integrated VIN bypass capacitors for fast, clean, low-overshoot switching edges to deliver high efficiency at high switching frequencies and minimize Electromagnetic interference (EMI) emissions. An I2C-based PMBus 1.3-compliant serial interface enables control of device functions and provides telemetry information for system monitoring.
The ADI LT7184S regulators are supported by the LTpowerPlay® graphical user interface (GUI) tool. The output voltage, frequency, phase, and device address can be configured using resistors for operation without programming. Settings can also be written via the serial interface and/or stored in EEPROM. The controlled on-time valley current mode control architecture with 25ns (typical) minimum on-time enables high switching frequency at low output voltage with excellent transient response in a small overall solution size.
Features
- Silent Switcher 2 architecture enables a compact, efficient, low EMI solution
- PMBus/I2C serial interface
- Telemetry read back includes VOUT, IOUT, VIN, die temperature, and faults
- Programmable voltage, current limit, digital soft-start/stop, sequencing, UV/OV, phase, frequency (up to 4MHz), and loop compensation
- Integrated EEPROM with fault event log
- Set key parameters with configuration resistors for operation without programming
- ±0.25% output voltage accuracy over temperature from 0.6V to 1.375V
- PolyPhase® load sharing for up to eight phases
- Wide VIN range - down to 2.9V, or 1.5V with EXTVCC up to 16V
- Over 94% peak efficiency at 1MHz, 12VIN to 3.3VOUT
- 0.4V to 5.5V VOUT range (up to 85% x VIN)
- Differential remote VOUT sense
- External frequency synchronization
- -40°C to +150°C operating junction temperature
- 36-lead (4mm x 5mm) LQFN package
Applications
- Communications, storage, and industrial systems
- Data center and solid-state drive (SSD) power supplies
Typical Application
Functional Block Diagram
Related Products
Analog Devices Inc. Silent Switcher® Solutions for EMI Compliance
Delivers up to 95% efficiency at 2MHz with ultra-low EMI/EMC emissions.
Đã phát hành: 2025-10-02
| Đã cập nhật: 2025-10-20