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TPS51220 Datasheet(PDF) 9 Page - Texas Instruments |
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TPS51220 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 43 page TPS51220 www.ti.com SLVS785C – OCTOBER 2007 – REVISED JULY 2009 TERMINAL FUNCTIONS (continued) TERMINAL I/O DESCRIPTION NAME NO. Control architecture and OVP function selection pin. GND: Current mode, OVP enable FUNC 11 I VREF2: D-CAP mode, OVP disable VREG3: D-CAP mode, OVP enable VREG5: Current mode, OVP disable VREF2 13 O 2-V Reference Output. Bypass to (signal) GND by 0.22 μF ceramic capacitor. Overcurrent trip level and discharge mode selection pin. GND: V(OCL-ULV) , Discharge on TRIP 14 I VREF2: V(OCL-ULV), Discharge off VREG3: V(OCL-LV), Discharge off VREG5: V(OCL-LV), Discharge on VREF2 and VREG5 Linear Regulators Enable Pin. When turning on, apply greater than 1.2V and less than EN 12 I 6V. Connect to GND to Disable. VBST1 31 Supply inputs for high-side NFET driver (boot strap Terminal). Connect a capacitor (0.1 μF or greater is I recommended) from this pin to respective SW terminal. Additional SB diode from VREG5 to this pin is an VBST2 26 optional. DRVL1 30 O Low-side MOSFET gate driver outputs. Source 1.3 Ω, sink 0.7 Ω, GND referenced driver. DRVL2 27 VREG5 switchover power supply input pin. When EN1 is high, PGOOD1 indicates GOOD and V5SW V5SW 2 I voltage is higher than 4.8 V, switch-over function will be enabled. (Note) When switch-over is enabled, VREG5 output voltage will be almost the same as V5SW input voltage. 5-V, 100-mA low-dropout linear regulator output. Bypass to (power) GND using a 10- μF ceramic capacitor. Runs from VIN supply. Internally connected to VBST and DRVL. Shuts off with EN. Switches over to V5SW VREG5 29 O when 4.8 V or above is provided. (Note: when switch-over (above V5SW) is enabled, VREG5 output voltage is approximately the same as V5SW input voltage.) VIN 23 I Supply input for 5-V and 3.3-V linear regulator. Typically connected to VBAT. GND 28 – Ground. Copyright © 2007–2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links :TPS51220 |
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