Document
LTC3586/LTC3586-1
Features
High Efficiency USB Power Manager with Boost,
Buck-Boost and Dual Bucks
Description
Power Manager n High Efficiency Switching PowerPathTM Controller
with Bat-TrackTM Adaptive Output Control and “Instant-On” Operation n Programmable USB or Wall Current Limit (100mA/500mA/1A) n Full Featured Li-Ion/Polymer Battery Charger with Float Voltage of 4.1V (LTC3586-1) or 4.2V (LTC3586) with 1.5A Maximum Charge Current n Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode n <30µA No-Load Quiescent Current when Powered from BAT n Dual High Efficiency Buck DC/DCs (400mA IOUT) n High Efficiency Buck-Boost DC/DC (1A IOUT) n High Efficiency Boost DC/DC (800mA IOUT) n Compact (4mm × 6mm × 0.75mm) 38-Pin QFN Package
Applications
The LTC®3586/LTC3586-1 are highly integrated 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, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buckboost and one boost). Designed specifically for USB applications, the LTC3586/LTC3586-1’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications.
Unlike linear chargers, the LTC3586/LTC3586-1 switching architecture transmits nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small places. The two buck regulators can provide up to 400mA each, the buck-boost can deliver 1A, and the boost delivers at least 800mA.
The LTC3586/LTC3586-1 are available in a low profile (0.75mm) 38-pin 4mm × 6mm QFN package.
n Digital Still Cameras n HDD-Based MP3 Players, PDAs, GPS, PMPs n Other USB-Based Handheld Products
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118, 6404251.
Typical Application
High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and Boost
USB/WALL 4.5V TO 5.5V
CHARGE
4 EN MODE
2 ILIM
USB COMPLIANT STEP-DOWN REGULATOR
CURRENT
CC/CV BATTERY
0V
CONTROL
CHARGER
LTC3586/LTC3586-1
ALWAYS ON LDO
DUAL HIGH EFFICIENCY 1 BUCKS 2
HIGH EFFICIENCY BUCK-BOOST
3
HIGH EFFICIENCY BOOST
4
TO OTHER LOADS
OPTIONAL
+
T
Li-Ion
3.3V/20mA 0.8V TO 3.6V/400mA 0.8V TO 3.6V/400mA
RTC/LOW POWER LOGIC
MEMORY/ CORE µP
2.5V to 3.3V/1A I/O SYSTEM
FAULT
5V/800mA
AUDIO/ MOTOR
3586 TA01
CHARGE CURRENT (mA)
Battery Charge Current vs Battery Voltage (LTC3586)
700 BATTERY CHARGE CURRENT
600
EXTRA CURRENT
500
FOR FASTER CHARGING
500mA USB CURRENT LIMIT
400
300
200
100
VBUS = 5V 5x MODE
BATTERY CHARGER PROGRAMMED FOR 1A 0
2.8 3 3.2 3.4 3.6 3.8 4 4.2
BATTERY VOLTAGE (V)
3586 TA01b
3586fb
LTC3586/LTC3586-1
Absolute Maximum Ratings
(Notes 1, 5)
VBUS (Transient) t < 1ms, Duty Cycle < 1%...........................................– 0.3V to 7V
VIN1, VIN2, VIN3, VIN4, VBUS (Static),
BAT, NTC, CHRG, FAULT, ILIM0, ILIM1, EN3, EN4, MODE, FB4, VOUT4 ......................– 0.3V to 6V FB1................... – 0.3V to Lesser of 6V and (VIN1 + 0.3V) FB2................... – 0.3V to Lesser of 6V and (VIN2 + 0.3V) FB3, VC3........... – 0.3V to Lesser of 6V and (VIN3 + 0.3V) EN1, EN2................................– 0.3V to Lesser of 6V and
Max (VBUS, VOUT, BAT) + 0.3V ICLPROG.....................................................................3mA IFAULT, ICHRG...........................................................50mA IPROG........................................................................2mA ILDO3V3. ..................................................................30mA ISW1, ISW2.............................................................600mA ISW, IBAT, IVOUT............................................................2A ISWAB3, ISWCD3, ISW4, IVOUT3....................................2.5A Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3).............................. 125°C
Storage Temperature Range...................–65°C to 125°C
Pin Configuration
TOP VIEW
FAULT SW VBUS VBUS VOUT EN4 BAT
ILIM0 1 ILIM1 2 LDO3V3 3 CLPROG 4 NTC 5 VOUT4 6 VOUT4 7 SW4 8 MODE 9
FB4 10 FB3 11 VC3 12
38 37 36 35 34 33 32 39
13 14 15 16 17 18 19
31 GATE 30 CHRG 29 PROG 28 FB1 27 VIN1 26 SW1 25 SW2 24 VIN2 23 FB2 22 VIN4 21 EN1 20 EN2
SWAB3 VIN3 VIN3
VOUT3 VOUT3
EN3 SWCD3
UFE PACKAGE 38-LEAD (4mm s 6mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3586EUFE#PBF
LTC3586EUFE#TRPBF 3586
38-Lead (4mm × 6mm) Plastic QFN
LTC3586EUFE.