Product Description
| 1 Features 1• Charger and Power Path – 2-A Output Current on Power Path – Linear Charger; 700-mA Maximum Charge Current – 20-V Tolerant USB and AC Inputs – Thermal Regulation, Safety Timers – Temperature Sense Input • Step-Down Converter (DCDC1, DCDC2, DCDC3) – Three Step-Down Converter With Integrated Switching FETs – 2.25-MHz Fixed Frequency Operation – Power-Save Mode at Light-Load Current – Output Voltage Accuracy in PWM Mode ±2% – 100% Duty Cycle for Lowest Dropout – Typical 15-μA Quiescent per Converter – Passive Discharge to Ground When Disabled • LDO Regulators (LDO1, LDO2) – Two Adjustable LDOs – LDO2 can be Configured to Track DCDC3 – Typical 15-μA Quiescent Current • Load Switches (LDO3, LDO4) – Two Independent Load Switches That Can Be Configured as LDOs • WLED Driver – Internally Generated PWM for Dimming Control – 38-V Open-LED Protection – Supports Two Strings of up to 10 LEDs at 25 mA Each – Internal Low-Side Current Sinks • Protection – Undervoltage Lockout and Battery Fault Comparator – Always-On Push-Button Monitor – Hardware Reset Pin – Password Protected I2C Registers • Interface – I2C Interface (Address 0x24) – Password-Protected I2C Registers 2 Applications • Sitara™ AM335x Processor Power • Portable Navigation Systems • Tablet Computing • 5-V Industrial Equipment 3 Description The TPS65217x is a single-chip power management IC (PMIC) specifically designed to power the AM335x ARM® Cortex®-A8 processor in portable and 5-V linepowered applications. The PMIC device provides a linear battery charger for single-cell Li-ion and Lipolymer batteries, dual-input power path, three stepdown converters, four low-dropout (LDO) regulators, and a high-efficiency boost converter to power two strings of up to 10 LEDs each. The system can be supplied by any combination of USB port, 5-V AC adaptor, or Li-Ion battery. The device is characterized across a –40°C to +105°C temperature range which makes it suitable for industrial applications. Three high-efficiency 2.25-MHz step-down converters can providing the core voltage, memory, and I/O voltage for a system. The TPS65217x device comes in a 48- pin leadless package (6-mm × 6-mm VQFN) with a 0.4-mm pitch. |
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