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TPS62743 Datasheet(PDF) 8 Page - Texas Instruments |
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TPS62743 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page UVLO EN Gate Driver Anti Shoot-Through Current Limit Comparator SW Limit High Side VIN GND PMOS NMOS V TH_UVLO VIN UVLO Comp Softstart Control Logic VOS V FB Main Comparator Direct Control & Compensation Error amplifier Min. On Min. OFF VIN VOS Timer DCS Control Current Limit Comparator Limit Low Side Power Stage UVLO VOS Internal feedback divider network* VSEL1 VSEL2 VSEL3 Ultra Low Power Reference V TH_100 VIN Auto 100% Mode Comp 100% Mode V Discharge OUT V FB UVLO EN EN VOS * typical 50MW V REF TPS62743 SLVSCQ0 – JUNE 2015 www.ti.com 9 Detailed Description 9.1 Overview The TPS62743 is a high frequency step down converter with ultra low quiescent current. The device operates with a quasi fixed switching frequency typically at 1.2 MHz. Using TI's DCS-Control™ topology the device extends the high efficiency operation area down to a few microamperes of load current during Power Save Mode Operation. 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 DCS-Control™ TI's DCS-Control™ (Direct Control with Seamless Transition into Power Save Mode) is an advanced regulation topology, which combines the advantages of hysteretic and voltage mode control. Characteristics of DCS- Control™ are excellent AC load regulation and transient response, low output ripple voltage and a seamless transition between PFM and PWM mode operation. DCS-Control™ includes an AC loop which senses the output voltage (VOS pin) and directly feeds the information to a fast comparator stage. This comparator sets the switching frequency, which is constant for steady state operating conditions, and provides immediate response to dynamic load changes. In order to achieve accurate DC load regulation, a voltage feedback loop is used. The internally compensated regulation network achieves fast and stable operation with small external components and low ESR capacitors. 8 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS62743 |
Similar Part No. - TPS62743_15 |
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Similar Description - TPS62743_15 |
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