Integrated Power Management IC w/ 3 DC/DCs, 4 LDOs, Linear Battery Charger & White LED Driver - TPS65217

TPS65217 (ACTIVE)

Integrated Power Management IC w/ 3 DC/DCs, 4 LDOs, Linear Battery Charger & White LED Driver

Description

The TPS65217 is a single chip power management IC specifically designed to support the AM335x series of application processors 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 are targeted at providing the core voltage, memory, and I/O voltage for a processor based system.

They 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 are intended to 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 support up to 200 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 DCDC 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 DCDC converters can remain up in a low-power PFM mode to support processor suspend mode.

The TPS65217 offers flexible power-up and power-down sequencing and several house-keeping functions such as power-good output, pushbutton monitor, hardware reset function and temperature sensor to protect the battery.

TPS65217A is targeted at the AM335x processor in the ZCE package which does not support DVFS (dynamic voltage and frequency scaling). In this package, the VDD_MPU and VDD_CORE supplies are shorted together and require a single power rail only. DCDC1 output voltage is set to 1.8 V to supply DDR2 memory. TPS65217B is targeted at the AM335x processor in the ZCZ package which supports DVFS and requires dedicated DCDC converters for VDD_MPU and VDD_CORE rails. DCDC1 output voltage is set to 1.8V to supply DDR2 memories. TPS65217C is also targeted at the AM335x processor in the ZCZ package, but DCDC1 output voltage is set to 1.5 V to supply DDR3 memories. LDO3 is set to 1.8 V and supports up to 400-mA of current. Please see Application note SLVU551 for details.

TPS65217D is identical to TPS65217C with the only difference that DCDC1 output voltage defaults to 1.35 V to support DDR3L memories.

The TPS65217A, TPS65217B, TPS65217C and TPS65217D come in a 48-pin leadless package (6-mm × 6-mm QFN) with a 0.4-mm pitch.

Features

  • 2-A Output Current on Power Path
  • Linear Charger; 700-mA Maximum Charge Current
  • 20-V Tolerant USB and AC Inputs
  • 100-mA, 500-mA, 1300-mA or 1800-mA Current Limit
    on USB Input
  • Thermal Regulation, Safety Timers
  • Temperature Sense Input
  • Three Step-Down Converter With Integrated Switching FETs
    • DCDC1: 0.9 V – 1.8 V at 1.2 A
    • DCDC2: 0.9 V – 3.3 V at 1.2 A
    • DCDC3: 0.9 V – 1.5 V at 1.2 A
  • VIN Range: 2.7 V – 5.8 V
  • 2.25-MHz Fixed Frequency Operation
  • Power Save Mode at Light Load Current
  • Output Voltage Accuracy in PWM Mode ±2.0%
  • 100% Duty Cycle for Lowest Dropout
  • Typical 15-µA Quiescent per Converter
  • Passive Discharge to Ground When Disabled
  • Two Adjustable LDOs
    • LDO1: 1.0 V – 3.3 V (1.8-V Default)
      at 100 mA
    • LDO2: 0.9V – 3.3 V (3.3-V Default) at 100 mA
  • VIN Range: 1.8 V – 5.8 V
  • LDO2 Can Be Configured to Track DCDC3
  • Typical 15-µA Quiescent Current
  • Two Independent Load Switches That Can Be Configured as LDOs
  • Configured as Switches:
    • VIN Range: 1.8 V – 5.8 V
    • Switch Impedance 300 mΩ (Typical)
    • 200-mA Current Limit
    • Passive Discharge to Ground When Disabled
  • Configured as LDOs:
    • LDO Output Voltage Range: 1.5 V – 3.3 V
    • VIN Range: 2.7 V – 5.8 V
    • 200-mA Current Limit (TPS65217A, B)
    • 400-mA Current Limit (TPS65217C, D)
    • Passive Discharge to Ground When Disabled
  • 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
  • Undervoltage Lockout and Battery Fault Comparator
  • Always-On Push-Button Monitor
  • Hardware Reset Pin
  • Password Protected I2C Registers
  • I2C Interface (Address 0x24)
  • Password Protected I2C Registers
  • Available in 6-mm × 6-mm, 48-Pin QFN

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Parametrics Compare all products in Power Management Multi-Channel IC (PMIC) Solutions

 
Regulated Outputs (#)
Processor Name
Vin (Min) (V)
Vin (Max) (V)
Vout (Max) (V)
LDO
Step-Up DC/DC Converter
Step-Down DC/DC Converter
Iout (Max) (A)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS65217
7    
AM335x    
2.7    
5.8    
3.3    
4    
1    
3    
1.2    
Comm Control    
Catalog    
-40 to 105    
48VQFN    
3.45 | 1ku    
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