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TPS5625 Datasheet(PDF) 1 Page - Texas Instruments |
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TPS5625 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 10 page TPS5615, TPS5618, TPS5625, TPS5633 SYNCHRONOUS-BUCK HYSTERETIC REGULATOR CONTROLLER SLVS177B – SEPTEMBER 1998 – REVISED JULY 2000 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D ±1% Reference Over Full Operating Temperature Range D Synchronous Rectifier Driver for >90% Efficiency D Fixed Output Voltage Options of 1.5 V, 1.8 V, 2.5 V, and 3.3 V D User-Selectable Hysteretic-Type Control D Low Supply Current ...3 mA Typ D 11.4-V to 13-V Input Voltage Range, VCC D Power Good Output D Programmable Soft-Start D Overvoltage/Overcurrent Protection D Active Deadtime Control description The TPS5615 family of synchronous-buck regulator controllers provides an accurate supply voltage to DSPs. The output voltage is internally set by a resistive divider with an accuracy of 1% over the full operating temperature range. A hysteretic controller with user-selectable hysteresis is used to dramatically reduce overshoot and undershoot caused by load transients. Propagation delay from the comparator inputs to the output drivers is less than 250 ns. Overcurrent shutdown and crossover protection for the output drivers combine to eliminate destructive faults in the output FETs. PWRGD monitors the output voltage and pulls the open-collector output low when the output drops below 93% of the nominal output voltage. An overvoltage circuit disables the output drivers if the output voltage rises 15% above the nominal value. The inhibit pin can be used to control power sequencing. Inhibit and undervoltage lockout assures that the 12-V supply voltage and system supply voltage (5 V or 3.3 V) are within proper operating limits before the controller starts. The output driver circuits include 2-A drivers with internal 8-V gate-voltage regulators that can easily provide sufficient power for today’s high-powered DSPs. The high-side driver can be configured either as a ground-referenced driver or as a floating bootstrap driver. The TPS5615 family is available in a 28-pin TSSOP PowerPad ™ package. It operates over a junction temperature range of 0 °C to 125°C. AVAILABLE OPTIONS PACKAGE TJ OUTPUT VOLTAGE TSSOP† (PWP) 1.5 V TPS5615PWP 0 °Cto125°C 1.8 V TPS5618PWP 0 °C to 125°C 2.5 V TPS5625PWP 3.3 V TPS5633PWP † The PWP package is availble taped and reeled. Add R suffix to device type (e.g., TPS5615PWPR). Copyright © 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 IOUT AGND2 OCP VHYST VREFB VSENSE ANAGND SLOWST BIAS LODRV LOHIB DRVGND LOWDR DRV PWRGD NC NC NC NC NC INHIBIT IOUTLO LOSENSE HISENSE BOOTLO HIGHDR BOOT VCC PWP PACKAGE (TOP VIEW) NC – No internal connection PowerPAD is a trademark of Texas Instruments Incorporated. |
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