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TPS73201QDBVRQ1 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS73201QDBVRQ1 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 31 page Servo Error Amp Ref 27kW 8kW Current Limit Charge Pump Thermal Protection Bandgap NR OUT R 1 R 2 EN GND IN R 1 + R2 = 80kW Copyright © 2016, Texas Instruments Incorporated 11 TPS732-Q1 www.ti.com SGLS303F – MAY 2005 – REVISED APRIL 2016 Product Folder Links: TPS732-Q1 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated 7 Detailed Description 7.1 Overview The TPS732-Q1 low-dropout linear regulator devices operate with an input voltage down to 1.7 V and support output voltages down to 1.2 V while sourcing up to 500 mA of load current. These linear regulators use an NMOS pass element with an integrated 4-MHz charge pump to provide a dropout voltage of less than 250 mV at full load current. This unique architecture also permits stable regulation over a wide range of output capacitors. In fact, the TPS732-Q1 family of devices does not require any output capacitor for stability. The increased insensitivity to the output capacitor value and type makes this family of linear regulators an ideal choice when powering a load where the effective capacitance is unknown. The TPS732-Q1 family of devices also features a noise reduction (NR) pin that allows for additional reduction of the output noise. The low noise output featured by the TPS732-Q1 family makes the device well-suited for powering VCOs or any other noise-sensitive load. 7.2 Functional Block Diagram Fixed voltage version. 7.3 Feature Description 7.3.1 Internal Current Limit The TPS732-Q1 internal current limit helps protect the regulator during fault conditions. Foldback helps to protect the regulator from damage during output short-circuit conditions by reducing current limit when VOUT drops below 0.5 V. See Figure 9. 7.3.2 Shutdown The enable pin is active high and is compatible with standard TTL-CMOS levels. VEN below 0.5 V (maximum) turns the regulator off and drops the ground pin current to approximately 10 nA. When shutdown capability is not required, the Enable pin can be connected to VIN. When a pullup resistor is used, and operation down to 1.8 V is required, use pullup resistor values below 50 k Ω. |
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