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SI9139DG-3315 датащи(PDF) 1 Page - Vishay Siliconix |
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SI9139DG-3315 датащи(HTML) 1 Page - Vishay Siliconix |
1 / 17 page Si9139 Vishay Siliconix New Product Document Number: 71841 S-22317—Rev. A, 16-Dec-02 www.vishay.com 1 Multi-Output, Individual On/Off Control Power-Supply Controller FEATURES D Five Output 50-W, Triple Output DC-DC-Controller D Up to 95% Efficiency D "3% Total Regulation (Line, Load and Temperature) D 4.5-V to 30-V Input Voltage Range D Two Fixed 1.5-V, 1.8-V, 2.0-V, 2.2-V, 2.5-V, 2.8-V, 3.3-V Outputs D One Adjustable 1.24-V to 20-V Output D 3.3-V Reference Output D 5-V/30-mA Linear Regulator Output D Individual ON/OFF Control for A and B Outputs D 300-kHz Low-Noise Fixed Frequency Operation D High Efficiency Pulse Skipping Mode Operation at Light Load D Only Three Inductors RequiredNo Transformer D LITTLE FOOTR Optimized Output Drivers D Internal Under Voltage Lockout and Soft-Start D Minimum Number of External Control Components D 28-Pin SSOP Package D Output Overvoltage Protection D Output Undervoltage Shutdown D Power-Good Output (RESET) APPLICATIONS D Notebook and Subnotebook Computers D PDAs and Mobile Communicators D Portable Display D Multimedia Set-Top Box D Telecommunications Infrastructure D Network Equipment D Distributed Power Conversion DESCRIPTION The Si9139 is current-mode PWM and PSM converter controller, with two high current, high efficiency synchronous buck controllers and an adjustable buck-boost controller whose output can be set between 1.24 V and 20 V with an external resistor divider. Designed for fixed and portable devices, it offers a total of five power outputs (three tightly regulated dc/dc converter outputs, a precision 3.3-V reference and a 5-V LDO output. Individually controlled power-up sequencing, power-good signal with delay, internal frequency compensation networks and automatic boot-strapping simplify the system by minimizing the number of external components while achieving conversion efficiencies approaching 95%. The Si9139 is available in a 28-pin SSOP package and specified to operate over the extended commercial (-40 _C to 85 _C) temperature range. FUNCTIONAL BLOCK DIAGRAM 5-V Linear Regulator 3.3-V Voltage Reference 1.5- V - 3.3-V SMPSA 1.8- V - 3.3-V SMPSB Auxiliary SMPS Programmable VIN (4.5 V to 30 V) 0 - 6 A VL (5.0 V) VREF (+3.3 V) 1.24-V to 20-V/500 mA Adjustable Power_Good RESET (Power_Good) ONA ONB Logic Control 0 - 6 A VOUT C VOUT B VOUT A |
Аналогичный номер детали - SI9139DG-3315 |
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Аналогичное описание - SI9139DG-3315 |
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