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TPS51220A-Q1 Fiches technique(PDF) 10 Page - Texas Instruments |
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TPS51220A-Q1 Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 50 page TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com PIN FUNCTIONS (continued) PIN I/O DESCRIPTION NAME NO. Control architecture and OVP functions 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 with 0.22- μF of ceramic capacitance. 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 1.2 V and less than 6 EN 12 I V. Connect to GND to disable. VBST1 31 Supply inputs for high-side N-channel FET driver (boot strap terminal). Connect a capacitor (0.1- μF or I greater is recommended) from this pin to respective SW terminal. Additional SB diode from VREG5 to this VBST2 26 pin is an optional. DRVL1 30 O Low-side MOSFET gate driver outputs. Source 1.3 Ω, sink 0.7 Ω, and GND referenced driver. DRVL2 27 VREG5 switchover power supply input pin. When EN1 is high, PGOOD1 indicates GOOD and V5SW voltage is higher than 4.83 V, switch-over function is enabled. V5SW 2 I Note: When switch-over is enabled, VREG5 output voltage is approximately equal to the 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 4.83 V or above is provided. Note: When switch-over (see above V5SW) is enabled, VREG5 output voltage is approximately equal to V5SW input voltage. VIN 23 I Supply input for 5-V and 3.3-V linear regulator. Typically connected to VBAT. GND 28 – Ground 10 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 |
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