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TPS2557DRBR Datasheet(PDF) 5 Page - Texas Instruments |
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TPS2557DRBR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 23 page Charge Pump Driver UVLO Current Limit Thermal Sense 8-ms Deglitch IN GND EN ILIM OUT FAULT CS Current Sense R L C L OUT TEST CIRCUIT t r t f 10% 90% 10% 90% V OUT t on t off 10% 90% 50% 50% V EN V OUT V EN V OUT t on t off 50% 50% 10% 90% VOLTAGE WAVEFORMS TPS2556 TPS2557 www.ti.com SLVS931A – NOVEMBER 2009 – REVISED FEBRUARY 2012 DEVICE INFORMATION Pin Functions PIN I/O DESCRIPTION NAME TPS2556 TPS2557 EN 4 – I Enable input, logic low turns on power switch EN – 4 I Enable input, logic high turns on power switch GND 1 1 Ground connection; connect externally to PowerPAD IN 2, 3 2, 3 I Input voltage; connect a 0.1 μF or greater ceramic capacitor from IN to GND as close to the IC as possible. FAULT 8 8 O Active-low open-drain output, asserted during overcurrent or overtemperature conditions. OUT 6, 7 6, 7 O Power-switch output ILIM 5 5 O External resistor used to set current-limit threshold; recommended 20 k Ω ≤ RILIM ≤ 187 kΩ. Internally connected to GND; used to heat-sink the part to the PowerPAD ™ – – circuit board traces. Connect PowerPAD to GND pin externally. FUNCTIONAL BLOCK DIAGRAM PARAMETER MEASUREMENT INFORMATION Figure 2. Test Circuit and Voltage Waveforms Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS2556 TPS2557 |
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