Electronic Components Datasheet Search |
|
TPS62590 Datasheet(PDF) 8 Page - Texas Instruments |
|
|
TPS62590 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 26 page Outputvoltage Vout (PWM) Vout +1% PFMComparator threshold VoltagePositioning Lightload PFMMode moderatetoheavyload PWMMode TPS62590 SLVS897C – JANUARY 2009 – REVISED DECEMBER 2015 www.ti.com 7.3 Feature Description 7.3.1 Dynamic Voltage Positioning This feature reduces the voltage undershoots and overshoots at load steps from light to heavy load and vice versa. It is active in power-save mode and regulates the output voltage 1% higher than the nominal value. This provides more headroom for both the voltage drop at a load step, and the voltage increase at a load throw-off. Figure 5. Power-Save Mode Operation 7.3.2 Undervoltage Lockout The undervoltage lockout circuit prevents the device from malfunctioning at low input voltages and from excessive discharge of the battery and disables the output stage of the converter. The undervoltage lockout threshold is typically 1.85 V with falling VIN. 7.3.3 Mode Selection The MODE pin allows mode selection between forced PWM mode and power-save mode. Connecting this pin to GND enables the power-save mode with automatic transition between PWM and PFM mode. Pulling the MODE pin high forces the converter to operate in fixed frequency PWM mode even at light load currents. This allows simple filtering of the switching frequency for noise-sensitive applications. In this mode, the efficiency is lower compared to the power-save mode during light loads. The condition of the MODE pin can be changed during operation and allows efficient power management by adjusting the operation mode of the converter to the specific system requirements. 7.3.4 Enable The device is enabled setting EN pin to high. During the start-up time tStart Up the internal circuits are settled. Afterwards, the device activates the soft-start circuit. The EN input can be used to control power sequencing in a system with various DC–DC converters. The EN pin can be connected to the output of another converter, to drive the EN pin high and getting a sequencing of supply rails. With EN = GND, the device enters shutdown mode. In this mode, all circuits are disabled. In fixed output voltage versions, the internal resistor divider network is disconnected from FB pin. 7.3.5 Thermal Shutdown As soon as the junction temperature TJ exceeds 140°C (typical) the device goes into thermal shutdown. In this mode, the high-side and low-side MOSFETs are turned off. The device continues its operation when the junction temperature falls below the thermal shutdown hysteresis. 8 Submit Documentation Feedback Copyright © 2009–2015, Texas Instruments Incorporated Product Folder Links: TPS62590 |
Similar Part No. - TPS62590 |
|
Similar Description - TPS62590 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |