LTC3557
LTC3557-1
Info: : PRODUCTION
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LTC3557
LTC3557-1

USB Power Manager with Li-Ion Charger and Three Step-Down Regulators

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $5.19
Features
  • Seamless Transition Between Input Power Sources: Li-Ion Battery, USB, 5V Wall Adapter or High Voltage Buck Regulator with Bat-Track
  • 200mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss Power Path When Input Current is Limited or Unavailable
  • Triple Adjustable High Efficiency Step-Down Switching Regulators (600mA, 400mA, 400mA IOUT)
  • Pin Selectable Burst Mode® Operation
  • Full Featured Li-Ion/Polymer Battery Charger
  • 1.5A Maximum Charge Current with Thermal Limiting
  • Battery Float Voltage:
    • 4.2V (LTC3557)
    • 4.1V (LTC3557-1)
  • Low Profile 4mm x 4mm 28-Pin QFN Package
Additional Details
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The LTC3557/LTC3557-1 is a highly integrated power management and battery charger IC for single cell Li-Ion/Polymer battery applications. It includes a PowerPath manager with automatic load prioritization, a battery charger, an ideal diode and numerous internal protection features. Designed specifically for USB applications, the LTC3557/LTC3557-1 power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for wall adapter powered applications. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC3557/LTC3557-1 also includes three adjustable synchronous step-down switching regulators and a high voltage buck regulator output controller with Bat-Track that allows efficient charging from supplies as high as 38V. The LTC3557/LTC3557-1 is available in a low profile 4mm × 4mm × 0.75mm 28-pin QFN package.

Applications

  • HDD-Based MP3 Players
  • PDA, PMP, PND/GPS
  • USB-Based Handheld Products
Part Models 4
1ku List Price Starting From $5.19

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3557EUF#PBF
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LTC3557EUF#TRPBF
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LTC3557EUF-1#PBF
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LTC3557EUF-1#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 4

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DC1142A-A

LTC3557/-1 | USB Power Manager with Li-Ion/Polymer Charger and Three Buck Regulator

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DC1142A-B

LTC3557/-1 | USB Power Manager with Li-Ion/Polymer Charger & Three Buck Regulator

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DC1138A-B

LT3557EUF-1/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

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DC1138A-B

LT3557EUF-1/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

LT3557EUF-1/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

Product Detail

The DC1138A-B contains the LTC3557-1 Power Management Integrated Circuit (PMIC) plus the LT3505EDD 36V (40V transients) buck regulator. The LTC3557-1 (4.1V charge voltage) includes a PowerPath controller, a 1.5A battery charger (configured for 500mA), an ideal diode, an always-on LDO, three synchronous step-down switching regulators (600mA and 2 × 400mA ), as well as a buck regulator VC controller.


Designed specifically for USB applications, the PowerPath controller incorporates a precision input current limit which communicates with the battery charger to ensure that the input current does not violate the USB specification. The ideal diode from BAT to VOUT guarantees that ample power is always available to VOUT even if there is insufficient or absent power at VBUS. The LTC3557-1 also has the ability to receive power from a wall adapter or other non-current- limited power source.

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DC1138A-A

LTC3557EUF/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

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DC1138A-A

LTC3557EUF/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

LTC3557EUF/LT3505EDD Demo Board | PMIC Plus HV Buck, USB Power Manager with 0.5A Li-Ion Charger and Three Bucks Plus HV Buck Controller

Product Detail

The DC1138A-A contains the LTC3557 Power Management Integrated Circuit (PMIC) plus the LT3505EDD 36V (40V transients) buck regulator. The LTC3557 (4.2V charge voltage) includes a PowerPath controller, a 1.5A battery charger (configured for 500mA), an ideal diode, an always-on LDO, three synchronous step-down switching regulators (600mA and 2 × 400mA ), as well as a buck regulator VC controller.


Designed specifically for USB applications, the PowerPath controller incorporates a precision input current limit which communicates with the battery charger to ensure that the input current does not violate the USB specification. The ideal diode from BAT to VOUT guarantees that ample power is always available to VOUT even if there is insufficient or absent power at VBUS. The LTC3557 also has the ability to receive power from a wall adapter or other non-current-limited power source.

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