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Datasheet Linear Technology LTC3557-1

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

Datasheets

• Download » Datasheet, PDF, 326 Kb, Revision: C, File uploaded 10-22-2017
  LTC3557/LTC3557-1 USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
  Docket ↓
  LTC3557/LTC3557-1
  USB Power Manager with
  Li-Ion Charger and Three
  Step-Down Regulators
  FEATURES
  â–  â–  â–  â– 
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  â–  â–  DESCRIPTION Seamless Transition Between Input Power Sources:
  Li-Ion Battery, USB, 5V Wall Adapter or High
  Voltage Buck Regulator with Bat-TrackTM
  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 Ef�ciency 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 Pro�le 4mm × 4mm 28-Pin QFN Package APPLICATIONS ...

Prices

Packaging

Parametrics

	LTC3557EUF-1#PBF	LTC3557EUF-1#TRPBF
Battery Chemistry	Li-Ion, Li-Polymer	Li-Ion, Li-Polymer
Buck Output Current, A	0.4, 0.4, 0.6	0.4, 0.4, 0.6
Demo Boards	DC1138A-A,DC1138A-B,DC1142A-A,DC1142A-B	DC1138A-A,DC1138A-B,DC1142A-A,DC1142A-B
Export Control	no	no
Features	Battery Charger, Bat-Track, PowerPath, Triple Buck, LDO, Burst Mode	Battery Charger, Bat-Track, PowerPath, Triple Buck, LDO, Burst Mode
Float Voltage, V	4.2V	4.2V
LDO Output Current, A	0.025	0.025
Max Charge Current, A	1.5	1.5
Number of Cells	1	1
Number of Outputs	4	4
Operating Temperature Range, °C	0 to 85	0 to 85
PowerPath	Linear PowerPath, 200mΩ Internal Ideal Diode	Linear PowerPath, 200mΩ Internal Ideal Diode
Type of Charger	Linear	Linear
Vin Max, V	5.5	5.5
Vin Min, V	2.7	2.7

Eco Plan

Other Options

LTC3557

Articles

• Download » Articles - LT Journal, PDF, 244 Kb, 06-14-2007
  Highly Integrated USB Power Manager with Li-Ion Charger and Three Step-Down Switching Regulators in 4mm x 4mm QFN
  Docket ↓
  DESIGN FEATURES L Highly Integrated USB Power Manager
  with Li-Ion Charger and Three
  Step-Down Switching Regulators
  in 4mm × 4mm QFN
  by Amit Lele
  Introduction
  Mobile technology has radically
  changed the way we acquire, share
  and disseminate information. Modern,
  feature-rich handheld and portable
  devices require several power management circuits, including a battery
  charger, multiple step-down switching
  regulators and low power LDOs for
  watchdog circuitry. If each of these
  functions is served by a separate power
  supply IC, each IC (and its external
  components) occupies valuable board
  space, consumes battery-draining
  quiescent current and significantly
  increases the overall development and material costs of the device. The
  LTC3557 solves this problem by bringing all power management functions
  into a single device. It combines a full
  featured USB power manager, a Li-ion ...
• Download » Articles - LT Journal, PDF, 303 Kb, 09-23-2008
  New Family of Integrated Power Controllers Combine Fast Battery Charging, PowerPath Control and Efficient DC/DC Converters in Less Than 20mm2
  Docket ↓
  L DESIGN FEATURES New Family of Integrated Power
  Controllers Combine Fast Battery
  Charging, PowerPath Control and
  Efficient DC/DC Converters in
  by Sam Nork
  Less Than 20mm2
  Introduction
  The quickest way to build an efficient
  power system for a battery-powered
  portable application is to use an
  IC that combines all power control
  functions into a single chip, namely a
  Power Management Integrated Circuit
  (PMIC). PMICs seamlessly manage
  power flow from various power sources
  (wall adapters, USB and batteries) to
  power loads (device systems and the
  charging battery), while maintaining
  current limits where required (such
  as that specified for USB). To this
  end, PMICs typically feature built-in
  PowerPathâ„¢ control, DC/DC conver-USB/WALL
  4.35V TO 5.5V TO OTHER ...

Moldel Line

• LTC3557EUF-1#PBF LTC3557EUF-1#TRPBF

Manufacturer's Classification

• Power Management > PMIC & Multifunction > PMIC (DC/DC, PowerPath and Battery Charger)