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TPS54424RNVT Datasheet(PDF) 3 Page - Texas Instruments |
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TPS54424RNVT Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 40 page  1 BOOT 2 VIN 3 PGND 4 PGND 5 PGND 6 SW VIN 11 AGND 12 PGND 10 PGND 9 PGND 8 7 SW BOOT 1 VIN 2 PGND 3 PGND 4 PGND 5 12 AGND 11 VIN 10 PGND 9 PGND 8 PGND 7 SW 6 SW 3 TPS54424 www.ti.com SLVSDV8 – JULY 2017 Product Folder Links: TPS54424 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 5 Pin Configuration and Functions RNV Package 18-Pin VQFN-HR Top View Bottom View Pin Functions PIN I/O DESCRIPTION NAME NO. BOOT 1 I Floating supply voltage for high-side MOSFET gate drive circuit. Connect a 0.1-µF ceramic capacitor between BOOT and SW pins. VIN 2, 11 I Input voltage supply pin. Power for the internal circuit and the connection to drain of high- side MOSFET. Connect both pins to the input power source with a low impedance connection. Connect both pins and their neighboring PGND pins. PGND 3, 4, 5, 8, 9, 10 – Ground return for low-side power MOSFET and its drivers. SW 6, 7 O Switching node. Connected to the source of the high-side MOSFET and drain of the low-side MOSFET. AGND 12 – Ground of internal analog circuitry. AGND must be connected to the PGND plane. RT/CLK 13 I Switching frequency setting pin. In RT mode, an external timing resistor adjusts the switching frequency. In CLK mode, the device synchronizes to an external clock input to this pin. FB 14 I Converter feedback input. Connect to the output voltage with a resistor divider. COMP 15 I Error amplifier output and input to the PWM modulator. Connect loop compensation to this pin. SS/TRK 16 I Soft-start and tracking pin. Connecting an external capacitor sets the soft-start time. This pin can also be used for tracking and sequencing. EN 17 I Enable pin. Float or pull high to enable the device. Connect a resistor divider to this pin to implement adjustable under voltage lockout and hysteresis. PGOOD 18 O Open-drain power good indicator. It is asserted low if output voltage is outside if the PGOOD thresholds, VIN is low, EN is low, device is in thermal shutdown or device is in soft-start. |
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