TPS65217ARSLR.A中文资料德州仪器数据手册PDF规格书

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.