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SP6139EU-L Datasheet(PDF) 1 Page - Exar Corporation |
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SP6139EU-L Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 16 page  S SP P6 61 13 39 9 W Wiid de e IIn np pu utt,, 1 1..3 3M MH Hz z S Sy yn nc ch hrro on no ou us s P PW WM M S Stte ep p D Do ow wn n C Co on nttrro olllle err January 2009 Rev. 2.0.0 Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 – Fax. +1 510 668-7001 GENERAL DESCRIPTION The SP6139 is a 1300kHz constant frequency, voltage mode, synchronous PWM step down controller optimized for high efficiency. The SP6139 is adequately suited for split plane applications utilizing a low power 5V rail to power the controller circuitry, minimizing power dissipation. Its wide input voltage range of 3V to 15V allows for conversions from the standard 3.3V, 5V, 9.6V and 12V power rails to an output voltage adjustable down to 0.8V. Developed around a wide bandwidth internal amplifier, the SP6139 can accommodate type II and type III compensation schemes. Protection features include a programmable UVLO, thermal shutdown and output short circuit protection. The SP6139 is part of a larger family of step down controllers operating at various switching frequencies up to 1300kHz and input voltages up to 28V. Refer to Exar’s SP6132, SP6132H, SP6134, SP6134H and SP6137 for complete details. The SP6139 is available in lead free, RoHS compliant, space saving 10-pin MSOP package. APPLICATIONS • DSL Modems • Set-Top Boxes • 12V VIN Point of Load Applications FEATURES • 2.5V to 20V Step Down Achieved Using Dual Input • On-Board 1.5Ω sink (2Ω source) NFET Drivers • Up to 7A Output Capability • UVLO Detects Both VCC and VIN • Short-Circuit Protection with Auto- Restart • Supports Type II or III Compensation • Programmable Soft Start • Fast Transient Response • High Efficiency: Greater than 94% • Non-synchronous Start-Up • Small 10-Pin MSOP Package • U.S. Patent #6,922,041 TYPICAL APPLICATION DIAGRAM 5 6 3 CSS 47nF CBST 0.1 μF L1 SD25-2R2 2.2 μH @ 2.8A DCR=31m Ω Si4922DY 8.3A, 18m Ω C3 47 μF 6.3V R1 68.1k, 1% VOUT≤VIN 3.3V @ 2A R2 21.5k, 1% CVCC 10 μF 6.3V R3 150k, 1% R4 100k, 1% CF1 100pF CZ2 1.2nF CP1 39pF RZ2 12.7k, 1% 8 7 1 DBST MBR0530 SP6139 1 2 3 4 5 10 9 8 7 6 VCC GL GND VFB COMP BST GH SWN SS UVIN UVIN VCC GND 3 RLF 3.0,5% U1 CVCC Ceramic 8050 X5R QT SS GND2 C3, C4 Ceramic 1210 X5R C4 47 μF 6.3V RZ3 2.26k, 1% CZ3 220pF C1 22 μF 16V GND VIN 12V C1, C2 Ceramic 1210 X5R R5 Bead QB = 5V @ 30mA 0.8V Si4922DY 8.3A, 18m Ω 2 4 Fig. 1: SP6139 Application Diagram |
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