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TPS74901 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS74901 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 36 page  OUT OUT FB SS GND 10 9 8 7 6 IN IN PG BIAS EN 1 2 3 4 5 Thermal Pad IN IN IN PG BIAS OUT OUT OUT NC FB 6 7 8 9 10 20 19 18 17 16 1 2 3 4 5 6 7 3 TPS74901 www.ti.com SBVS082I – JUNE 2007 – REVISED MAY 2016 Product Folder Links: TPS74901 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions RGW Package 20-Pin VQFN Top View KTW Package 7-Pin DDPAK/TO-263 Top View DRC Package 10-Pin VSON with Thermal Pad Top View Pin Functions PIN I/O DESCRIPTION NAME DDPAK/TO-263 VQFN VSON BIAS 6 10 4 I Bias input voltage for error amplifier, reference, and internal control circuits. EN 7 11 5 I Enable pin. Driving this pin high enables the regulator. Driving this pin low puts the regulator into shutdown mode. This pin must not be left floating. FB 2 16 8 I This pin is the feedback connection to the center tap of an external resistor divider network that sets the output voltage. This pin must not be left floating. GND 4 12 6 — Ground IN 5 5, 6, 7, 8 1, 2 I Unregulated input to the device. NC — 2, 3, 4, 13, 14, 17 — — No connection. This pin can be left floating or connected to GND to allow better thermal contact to the top-side plane. OUT 3 1, 18, 19, 20 9, 10 O Regulated output voltage. A small capacitor (total typical capacitance ≥ 2.2 µF, ceramic) is needed from this pin to ground to assure stability. PG — 9 3 O Power-Good (PG) is an open-drain, active-high output that indicates the status of VOUT. When VOUT exceeds the PG trip threshold, the PG pin goes into a high-impedance state. When VOUT is below this threshold the pin is driven to a low-impedance state. A pullup resistor from 10 k Ω to 1 MΩ must be connected from this pin to a supply up to 5.5 V. The supply can be higher than the input voltage. Alternatively, the PG pin can be left floating if output monitoring is not necessary. SS 1 15 7 — Soft-Start pin. A capacitor connected on this pin to ground sets the start-up time. If this pin is left floating, the regulator output soft-start ramp time is typically 100 µs. Thermal Pad — Solder to the ground plane for increased thermal performance. |
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