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CS5127 データシート(PDF) 1 Page - Cherry Semiconductor Corporation |
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CS5127 データシート(HTML) 1 Page - Cherry Semiconductor Corporation |
1 / 24 page Features 3.3V CT SYNC COMP2 PGnd COMP1 ENABLE LGnd VFB1 VFB2 VREF VIN GATE1 GATE2 R6 1k CS5127 C12, C13 2 x 680 mF R9 2k Q3 IRL3103S R11 R2 27k VFFB1 VFFB2 RT Q2 IRL3103S C16 100 mF C8 1 mF R3 18k D2 1N5821 C15 100 mF L2 5 mH C1, C2 2 x 680 mF L1 5 mH C7 330pF 2.8V C10, C11 2 x 680 mF +5V C3 1 mF D1 1N5821 C14 330pF R4 1540 R5 1270 R10 20k + C6 0.1 mF R1 20k Q1 FMMT2222ACT 5V 12V + C4, C5 2 x 680 mF + C17 330pF 20k + + + R7 2400 R8 1500 C9 0.1 mF s Nonsynchronous Buck Design s V2ª Control Topology s 100ns Transient Loop Response s Programmable Oscillator Frequency s 30ns Typical Gate Rise and 10ns Fall Times (No Load) s Frequency Synchronization Input s ENABLE Input Controls Channel 2 Gate Driver s 5V/10mA Reference Output Package Option Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable CS5127 Description The CS5127 is a fixed frequency dual output nonsynchronous buck controller. It contains circuitry for regulating two separate outputs. Each output channel contains a high gain error amplifier, a com- parator and latch, and a totem-pole output driver capable of providing DC current of 100mA and peak cur- rent in excess of 0.5A. A common oscillator controls switching for both channels, and a sync lead is provided to allow parallel supply operation or shifting of the switch- ing noise spectrum. An on-chip 5V reference is capable of providing as much as 10mA of current for exter- nal circuitry. The CS5127 also contains two undervoltage lockout circuits. The first lockout releases when VIN reaches 8.4V, while the second lockout ensures that VREF is higher than 3.6V. The outputs are held in a low state until both lock- outs have released. The controller is configured to utilize the V2ª con- trol method to achieve the fastest possible transient response and best overall regulation. This dual controller is a cost-effective solu- tion for providing VCORE and VIO power solutions in computing applications using a single con- troller. The CS5127 will operate over an input voltage range of 9.4V to 20V and is available in a 16 lead wide body surface mount package. Applications Diagram 16 Lead SOIC Wide 1 1 CT SYNC COMP2 PGND COMP1 ENABLE LGND VFB1 VFB2 VREF VIN GATE1 GATE2 VFFB1 VFFB2 RT 12V, 5V to 2.8V @ 7A and 3.3V @ 7A for 233MHz Pentium¨ Processor with MMXª Technology V2 is a trademark of Switch Power, Inc. Pentium is a registered trademark and MMX is a trademark of Intel Corporation Rev. 11/3/98 Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ¨ |
同様の部品番号 - CS5127 |
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同様の説明 - CS5127 |
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