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TPS65000-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS65000-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 29 page TPS65000-Q1 VINLDO1 EN_LDO1 VINLDO2 EN_LDO2 VLDO1 VLDO2 AGND PGND FB_LDO1 FB_LDO2 Band-Gap Reference Oscillator SSCG 3-mm × 3-mm QFN VINDCDC EN_DCDC MODE SW FB_DCDC PG LDO2 300 mA Buck Converter 600 mA LDO1 300 mA TPS65000-Q1 SLVSC45B – AUGUST 2013 – REVISED SEPTEMBER 2015 www.ti.com 7 Detailed Description 7.1 Overview The TPS65000-Q1 device provides one step-down converter, two low dropout regulators, spread spectrum clock generation, and a supply voltage supervisor for the TPS65001 only. The device has an input voltage range of 2.3 V to 6.0 V and is characterized across a –40°C to +85°C range. This device is intended for (but not limited to) powering smart phones, embedded processors, and point-of-load devices. The output voltage of the step-down converter can be selected through resistor networks on the output. To maximize efficiency, there are two modes of operation based on load conditions: PWM or PFM. By pulling the MODE pin high, forced PWM can be achieved. Pulling this pin low results in an automatic adjustment between PFM and PWM modes. The two general-purpose low-dropout regulators each have their own separate enables and voltage inputs. The inputs can be tied to the output of the step-down converter or to a separate voltage source. Resistor networks are required on the output of the regulator to set the output voltage. Their wide voltage range allows for handling direct connections to a battery. The switching frequency of the step-down converter is handled by the oscillator, with a typical frequency of 2.25 MHz. The spread spectrum clock (SSC) modulates this frequency when the device is in PWM mode. This additional circuit in the oscillator block reduces power that may cause EMI. The TPS65000-Q1 device also provide a power good signal to monitor the condition of the DC-DC and both LDOs. The DC-DC and LDOs are only monitored if their enable signal is high. If all enabled resources are in regulation, the pin is pulled low. If one or more of the enabled resources are out of regulation, the pin is pulled in Hi-Z . 7.2 Functional Block Diagram 10 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated Product Folder Links: TPS65000-Q1 |
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