TPS652170 Texas instruments

TPS652170

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TPS652170

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Описание

The TPS652170 is a single-chip power management IC (PMIC) specifically designed to power the AM335x ARM® Cortex®-A8 processor in portable and 5-V line-powered applications. The PMIC device provides a linear battery charger for single-cell Li-ion and Li-polymer batteries, dual-input power path, three step-down 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 TPS652170 device comes in a 48-pin leadless package (6-mm × 6-mm VQFN) 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, 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

Regulated outputs (#)	9
Vin (min) (V)	2.75
Vin (max) (V)	5.8
Iout (max) (A)	1.2
Rating	Catalog
Step-down DC/DC controller	0
Step-down DC/DC converter	3
Step-up DC/DC controller	0
Step-up DC/DC converter	1
LDO	4
Iq (typ) (mA)	0.08
Switching frequency (max) (kHz)	2550
Features	Comm control, Dynamic voltage scaling, I2C control, Power good, Power sequencing
Operating temperature range (°C)	-40 to 105
Processor name	Sitara AM335x
Processor supplier	Texas Instruments
Shutdown current (ISD) (typ) (µA)	6
Switching frequency (typ) (kHz)	2250
Configurability	User programmable