FEATURES
Power Manager n High Efficiency Switching PowerPath™ Controller
with Bat-Track™ Adaptive Output Control n Progr...
FEATURES
Power Manager n High Efficiency Switching PowerPath™ Controller
with Bat-Track™ Adaptive Output Control n Programmable USB or Wall Current Limit
(100mA/500mA/1A) n Full Featured Li-Ion/Polymer Battery Charger n 1.5A Maximum Charge Current n Internal 180mΩ Ideal Diode + External Ideal Diode
Controller Powers Load in Battery Mode n Low No-Load Quiescent Current when Powered from
BAT (<32µA)
DC/DCs n Triple High Efficiency Step-Down DC/DCs
(1A/400mA/400mA IOUT) n All
Regulators Operate at 2.25MHz n Dynamic Voltage Scaling on Two Outputs n I2C or Independent Enable, VOUT Controls n Low No-Load Quiescent Current: 20µA n 28-Pin (4mm × 5mm × 0.75mm) QFN Package
APPLICATIONS
n HDD-Based MP3 Players, PDAs, GPS, PMPs n Portable Medical Products n Handheld Instrumentation n Other USB-Based Handheld Products
LTC3555/LTC3555-X
High Efficiency USB Power Manager + Triple
Step-Down DC/DC DESCRIPTION
The LTC®3555 family are highly integrated USB compatible power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency current limited switching PowerPath manager with automatic load prioritization, a battery charger, an ideal diode and three general purpose synchronous step-down switching
regulators.
The LTC3555 family limits input current to either 100mA or 500mA for USB applications or 1A for adapter-powered applications. Unlike linear chargers, the LTC3555 family’s switching architecture transmits nearly all of the power available f...