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TPS60141PWPR Datasheet(PDF) 8 Page - Texas Instruments |
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TPS60141PWPR Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page Charge Pump Power Stage C1 C1− C1+ IN PGND C2 C2− C2+ IN OUT PGND Oscillator Control Circuit ENABLE Shutdown/ Start-up Control _ + + − VREF _ + + − 0.8 × VI FB _ + + − VREF PG TPS60141 GND TPS60140, TPS60141 SLVS273A – FEBRUARY 2000 – REVISED NOVEMBER 2015 www.ti.com Functional Block Diagrams (continued) Figure 4. TPS60141 Functional Block Diagram 9.3 Feature Description 9.3.1 Undervoltage Lockout The TPS6014x devices have an undervoltage lockout feature that deactivates the device and places it in shutdown mode when the input voltage falls below 1.6 V. 9.3.2 Low-Battery Detector (TPS60140 Only) The internal low-battery comparator trips at 1.21 V ± 5% when the voltage on pin LBI ramps down. The voltage V(TRIP) at which the low battery warning is issued can be adjusted with a resistive divider as shown in Figure 5. TI recommends that the sum of resistors R1 and R2 to be in the 100-k Ω to 1-MΩ range. When choosing R1 and R2, be aware of the input leakage current into the LBI terminal. LBO is an open-drain output. TI recommends an external pullup resistor to OUT, in the 100-k Ω to 1-MΩ range. During start-up, the LBO output signal is invalid for the first 500 µs. LBO is high impedance when the device is disabled. If the low-battery comparator function is not used, connect LBI to ground and leave LBO unconnected. 8 Submit Documentation Feedback Copyright © 2000–2015, Texas Instruments Incorporated Product Folder Links: TPS60140 TPS60141 |
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