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LT7184S Datasheet(PDF) 1 Page - Analog Devices |
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LT7184S Datasheet(HTML) 1 Page - Analog Devices |
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1 / 52 page  Data Sheet LT7184S Dual Channel 9A, 16V PolyPhase Step-Down Silent Switcher 2 with Digital Power System Management Rev. 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT One Analog Wa y, Wilmington, MA 01887 - 2356, U.S.A. T el: 781.329.4700 © 2024 Analog D evic es, Inc. Al l rig hts r eser ved. FEATURES Silent Switcher® 2 Architecture: Enables Compact, Efficient, Low EMI Solution PMBus/I2C Serial Interface Telemetry Read Back Includes: VOUT, IOUT, VIN, Die Temperature, Faults Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, UV/OV, Phase, Frequency (up to 4MHz), 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 VOUT Range: 0.4V to 5.5V (up to 85% x VIN) Differential Remote VOUT Sense External Frequency Synchronization 36-Lead (4mm x 5mm) LQFN Package APPLICATIONS Communications, Storage, and Industrial Systems Data Center and Solid-State Drive Power Supplies DESCRIPTION The LT7184S is a dual-output monolithic PolyPhase DC/DC synchronous step-down regulator that delivers up to 7A of continuous current from both channels simultaneously and supports 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. The I2C- based PMBus 1.3-compliant serial interface enables control of device functions and provides telemetry information for system monitoring. The LT7184S is supported by the LTpowerPlay® graphical user interface 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. TYPICAL APPLICATION Figure 1. Typical Application for the LT7184S Figure 2. LT7184S 12VIN Typical Application Efficiency LT7184S ASEL VOUT1_CFG PVIN0 PVIN1 SHARE_CLK VSENSE0P VSENSE1P VSENSE0N VSENSE1N VOUT0_CFG SW1 SW0 107kΩ 10µF VOUT0 3.3V/9A PVIN 10V TO 16V 107kΩ EXTVCC VOUT1 1.2V/9A INTVCC ITH0 DRVCC 10.1µF ITH1 RUN0 RUN1 51.1kΩ 330µF WP PGOOD0 PGOOD1 VDD18 330µF 4.7µF FAULT1 FAULT0 SDA SCL 6.8kΩ 10kΩ ALERT 2.2µH 1.0µH PMBUS/I2C BUS 0.1µF BOOST1 PWM_CFG 0.1µF BOOST0 SGND PGND SYNC 10µF 10µF 51.1kΩ SELECTS 1.2V 107kΩ SELECTS 3.3V 107kΩ SELECTS 500kHz CITH = 165pF RITH = 60kΩ gMEA = 155µs, SYNC INPUT |
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