The TPS65217 is a single-chip power management IC specifically designed to support applications in portable and 5-V non-portable applications. It provides a linear battery charger for single-cell Li-ion and Li-polymer batteries, dual-input power path, three step-down converters, four LDOs, 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.
●These step-down converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load currents. For low-noise applications the devices can be forced into fixed-frequency PWM using the I2C interface. The step-down converters allow the use of small inductors and capacitors to achieve a small solution size.
●LDO1 and LDO2 can support system-standby mode. In SLEEP state, output current is limited to 1 mA to reduce quiescent current whereas in normal operation they can support up to 100 mA each. LDO3 and LDO4 can be configured to support up to 400 mA each and can be configured as load switches instead of regulators. All four LDOs have a wide input voltage range that allows them to be supplied either from one of the dc-dc converters or directly from the system voltage node.
●By default only LDO1 is always ON but any rail can be configured to remain up in SLEEP state. Especially the dc-dc converters can remain up in a low-power PFM mode to support system suspend mode.
●The TPS65217 offers configurable power-up and power-down sequencing and several housekeeping functions such as power-good output, pushbutton monitor, hardware reset function and temperature sensor to protect the battery.
●For details on specific applications please see our application note SLVU551.
●The TPS65217 comes in a 48-pin leadless package (6-mm x 6-mm QFN) with a 0.4-mm pitch.
●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, -2, -3)
● 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
●LDOs (LDO1, -2)
● Two Adjustable LDOs
● LDO2 Can Be Configured to Track DCDC3
● Typical 15-µA Quiescent Current
●LOAD SWITCHES (LDO3, -4)
● 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
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