SI4812DY-T1 Vishay Semiconductors, SI4812DY-T1 Datasheet
SI4812DY-T1
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SI4812DY-T1 Summary of contents
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SMBus Multi-Output Power-Supply Controller FEATURES 95% Efficiency D 3% Total Regulation (Each Controller) D 5.5-V to 30-V Input Voltage Range D 3.3-V, 5-V, and 12-V Outputs D 200-kHz/300-kHz Low-Noise Frequency Operation D Precision 3.3-V Reference Output D ...
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Si9135 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS V to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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SPECIFICATIONS Parameter Reference REF Output REF Load Regulation Supply Current Supply Current*Shutdown Supply Current*Operation Oscillator Oscillator Frequency Oscillator Frequency SYNC High-Pulse Width SYNC Low-Pulse Width SYNC Rise/Fall Range SYNC V IL SYNC V IH Oscillator SYNC Range Maximum Duty Cycle ...
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Si9135 Vishay Siliconix PIN CONFIGURATION SSOP- FBFY 2 27 BSTFY 3 26 DHFY 4 25 LXFY 5 24 DLFY 6 23 CSP 7 22 CSN 8 21 GND 9 20 COMP 10 19 REF 11 18 ...
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TYPICAL CHARACTERISTICS (25_C UNLESS OTHERWISE NOTED) Efficiency vs. 3.3-V Output Current 100 Frequency = 200 kHz On Off 60 50 0.001 0.01 0.1 Current (A) Document ...
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Si9135 Vishay Siliconix TYPICAL WAVEFORMS 5-V Converter ( PWM Loading 5-V Converter ( PSM Õ PWM 5-V Converter ( PSM Operation www.vishay.com 6 5-V Converter (V Ch1: V ...
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TYPICAL WAVEFORMS 3-V Converter ( PWM, Loading 3-V Converter ( PSM Õ PWM 12-V Converter ( 250-mA Transient Document Number: 70817 S-40806—Rev. C, 26-Apr-04 3-V Converter (V Ch1: ...
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... D1 CMPD2836 CMPD2836 0 0.1 mF BST BST 3 5 DH5 DH3 Si4812DY DL5 Q3 Si4812DY DL3 CMPD2836 BSTFY 0.1 mF DHFY LXFY D5, D1FS4 FB3 DLFY CSP SCL SDA SYNC CSN FBFY REF COMP GND PGND FIGURE ...
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SMBUS Specification SMBus: The System Management Bus is a two-wire interface through which simple power related chips can communicate 2 with the rest of the system. It uses its backbone. Both SDA and SCL are bidirectional lines, ...
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Si9135 Vishay Siliconix TIMING DIAGRAMS 3 REF UVLO OSC SCL SDA SS/Enable www.vishay.com 10 ...
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DETAILED FUNCTIONAL BLOCK DIAGRAMS Error Amplifier − PWMCMP REF + − + Pulse Skipping SLC Control 20 mV Current Limit V Soft-Start SYNC t Rectifier Control Error Amplifier − REF + COMP C/S Amplifier ICSP − ICSN + 100 mV ...
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Si9135 Vishay Siliconix 5-V Linear V IN Regulator 3.3-V Reference 2.4 V DESCRIPTION OF OPERATION Start-up Sequence Si9135 is normally controlled by its SMBus interface after V is applied. Initially, if there is no incoming SMBus ...
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DESCRIPTION OF OPERATION (CONT’D) Buck Converter Operation The 3.3-V and 5-V buck converters are both current-mode PWM and PSM (during light load operation) regulators using high-side bootstrap n-channel and low-side n-channel MOSFETs. At light load conditions, the converters switch at ...
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Si9135 Vishay Siliconix DESCRIPTION OF OPERATION (CONT’D) SMBus Commands After completion of startup, Si9135’s converters can be individually group commanded on or off using a code word on the SMBus, as detailed in the SMBus Truth Table. ...
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Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description ...