LTC4090/LTC4090-5 USB Power Manager with 2A High Voltage Bat-Track Buck Regulator FEATURES DESCRIPTION n Seamless Transition Between Power Sources: The LTC 4090/LTC4090-5 are USB power managers plus Li-Ion Battery, USB, and 6V to 36V Supply (60V Max) high voltage Li-Ion/Polymer battery chargers. The devices n 2A Output High Voltage Buck Regulator with control the total current used by the USB peripheral for Bat-Track Adaptive Output Control (LTC4090) operation and battery charging. Battery charge current n Internal 215mW Ideal Diode Plus Optional is automatically reduced such that the sum of the load External Ideal Diode Controller Provides Low Loss current and the charge current does not exceed the pro- PowerPath When External Supply/ USB Not Present grammed input current limit. The LTC4090/LTC4090-5 n Load Dependent Charging from USB Input also accommodate high voltage power supplies, such as Guarantees Current Compliance 12V AC/DC wall adapters, Firewire, or automotive power. n Full Featured Li-Ion Battery Charger The LTC4090 provides a Bat-Track adaptive output that n 1.5A Maximum Charge Current with Thermal Limiting tracks the battery voltage for high efficiency charging from n NTC Thermistor Input for Temperature Qualified the high voltage input. The LTC4090-5 provides a fixed 5V Charging output from the high voltage input to charge single-cell n Tiny (3mm 6mm 0.75mm) 22-Pin DFN Package Li-Ion batteries. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured are programmable total charge time, an NTC APPLICATIONS thermistor input used to monitor battery temperature while n HDD-Based Media Players charging and automatic recharging of the battery. n Personal Navigation Devices L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks n Other USB-Based Handheld Products and Bat-Track, PowerPath and ThinSOT are trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. n Automotive Accessories TYPICAL APPLICATION LTC4090/LTC4090-5 High Voltage 0.47F 6.8H Battery Charger Efficiency SW BOOST HIGH (7.5V-36V) HVIN 22F VOLTAGE INPUT 90 1F FIGURE 12 SCHEMATIC LTC4090 WITH R = 52k HVOUT PROG 5V WALL 80 NO OUTPUT LOAD ADAPTER IN HVPR 4.7F 70 USB LTC4090 1k LTC4090-5 V OUT LOAD C 60 4.7F TIMER BAT 50 R CLPROG GND PROG T 40 59k HVIN = 8V + 40.2k 2k 100k 270pF 0.1F Li-Ion BATTERY HVIN = 12V 30 HVIN = 24V HVIN = 36V 20 V (TYP) AVAILABLE INPUT OUT 2.0 2.5 3.0 3.5 4.0 4.5 V + 0.3V HV INPUT (LTC4090) BAT V (V) BAT 5V HV INPUT (LTC4090-5) 4090 TA01b 5V USB ONLY V BAT ONLY BAT 4090 TAO1 4090fe 1 For more information www.linear.com/LTC4090 EFFICIENCY (%)LTC4090/LTC4090-5 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2, 3, 4) TOP VIEW HVIN, HVEN (Note 9) ................................................60V SYNC 1 22 HVEN BOOST ......................................................................56V PG 2 21 HVIN BOOST above SW .....................................................30V R 3 20 SW T PG, SYNC ..................................................................30V V 4 19 BOOST C IN, OUT, HVOUT NTC 5 18 HVOUT t < 1ms and Duty Cycle < 1% ................... 0.3V to 7V 23 VNTC 6 17 TIMER Steady State ............................................ 0.3V to 6V HVPR 7 16 SUSP BAT, HPWR, SUSP, V , CHRG, HVPR ........... 0.3V to 6V C CHRG 8 15 HPWR NTC, TIMER, PROG, CLPROG ..........0.3V to V + 0.3V CC PROG 9 14 CLPROG I , I , I (Note 5) ..............................................2.5A IN OUT BAT GATE 10 13 OUT Operating Temperature Range .....................40 to 85C BAT 11 12 IN Junction Temperature ............................................110C DJC PACKAGE Storage Temperature Range ......................65 to 125C 22-LEAD (6mm 3mm) PLASTIC DFN T = 110C, = 47C/W JMAX JA EXPOSED PAD (PIN 23) IS GND, MUST BE SOLDERED TO PCB