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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTM8049 датащи(PDF) 1 Page - Linear Technology |
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LTM8049 датащи(HTML) 1 Page - Linear Technology |
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1 / 34 page  LTM4651 1 4651f For more information www.linear.com/LTM4651 TYPICAL APPLICATION FEATURES DESCRIPTION EN55022B Compliant 58V, 24W Inverting-Output DC/DC μModule Regulator The LTM®4651 is an ultralow noise, 58V, 24W DC/DC μModule® inverting topology regulator. It regulates a nega- tive output voltage (VOUT–) from a positive input supply voltage(VIN),andisdesignedtomeettheradiatedemissions requirements of EN55022. Conducted emission require- ments can be met by adding standard filter components. Included in the package are the switching controller, power MOSFETs, inductor, filters and support components. The LTM4651 can regulate VOUT– to a value between –0.5V and –26.5V, provided that its input and output voltages adhere to the safe operating area criteria of the LTM4651: VIN + |VOUT–| ≤ 58V. A switching frequency range of 250kHz to 3MHz is supported (400kHz default) and the module can synchronize to an external clock. Despite being an inverting topology regulator, no level shift circuitry is needed to interface to the LTM4651’s RUN, PGOOD or CLKIN pins; those pins are referenced to GND. The LTM4651 is offered in a 15mm × 9mm × 5.01mm BGA package with SnPb or RoHS compliant terminal finish. –24V, 2.25A* Ultralow Noise** DC/DC μModule Regulator APPLICATIONS n Complete Low EMI Switch Mode Power Supply n EN55022 Class B Compliant n Wide Input Voltage Range: 3.6V to 58V n Up to 4A Output Current n 24W Output from 12VIN to –24VOUT, PLOSS = 5W, TA = 60°C, tRISE = 60°C, 200LFM n Output Voltage Range: –26.5V ≤ VOUT– ≤ –0.5V n Safe Operating Area: VIN + |VOUT–| ≤ 58V n ±1.67% Total DC Output Voltage Error Over Line, Load and Temperature (–40°C to 125°C) n Parallel and Current Share with Multiple LTM4651s n Constant-Frequency Current Mode Control n Frequency Synchronization Range: 250kHz to 3MHz n Power Good Indicator and Programmable Soft-Start n Overcurrent/Overvoltage/Overtemperature Protection n 15mm × 9mm × 5.01mm BGA Package n Avionics, Industrial Control and Test Equipment n Video, Imaging and Instrumentation n 48V Telecom and Network Power Supplies n RF Systems L , LT, LTC, LTM, Linear Technology , the Linear logo, LTpowerCAD and μModule are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5847554, 6580258. Output Current Capability* PINS NOT USED IN THIS CIRCUIT: CLKIN, PGOOD, PGDFB, SW, EXTVCC TEMP+, TEMP–, NC ISETa GND ISETb VIN SVIN VD RUN INTVCC VINREG COMPa COMPb fSET PGND GNDSNS SVOUT– VOUT– LTM4651 –24VOUT, UP TO 2.25A 10µF ×2 LOAD 90.9k 481k 4.7 F 4.7 F VIN 3.6V TO 34V 4651 TA01a **See Figures 5 – 8 for DC2328A Radiated Emission Performance against EN55022B limits. INPUT VOLTAGE (V) 0 10 20 30 40 50 60 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4651 TA01b *Current limit frequency-foldback activates at load currents higher than indicated curves. Continuous output current capability subject to details of application implementation. Switching frequency set per Table 1. See Notes 2 and 3. VOUT– = –0.5V VOUT– = –3.3V VOUT– = –5V VOUT– = –8V VOUT– = –12V VOUT– = –15V VOUT– = –20V VOUT– = –24V |
Аналогичный номер детали - LTM8049 |
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Аналогичное описание - LTM8049 |
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ссылки URL |
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