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Linear Technology Electronic Components Datasheet

LTC4090-3 Datasheet

USB Power Manager

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FEATURES
nn Seamless Transition Between Power Sources:
Li-Ion Battery, USB, and 6V to 36V Supply (60V Max)
nn 2A Output High Voltage Buck Regulator with
Bat-Track™ Adaptive Output Control
nn 3.95V Float Voltage Improves Battery Life Span and
High Temperature Safety Margin
nn Internal 215mΩ Ideal Diode Plus Optional External
Ideal Diode Controller Provides Low Loss
PowerPath™ When External Supply/ USB Not Present
nn Load Dependent Charging from USB Input Guaran-
tees Current Compliance
nn Full Featured Li-Ion Battery Charger
nn 1.5A Maximum Charge Current with Thermal Limiting
nn NTC Thermistor Input for Temperature Qualified
Charging
nn Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package
APPLICATIONS
nn Embedded Automotive Accessories
nn Personal Navigation Devices
nn Other USB-Based Handheld Products
LTC4090-3
USB Power Manager with
2A High Voltage Bat-Track
Buck Regulator
DESCRIPTION
The LTC®4090-3 is a USB power manager plus high voltage
Li-Ion/Polymer battery charger. The device controls the
total current used by the USB peripheral for operation and
battery charging. 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 LTC4090-3 also accommodates high
voltage power supplies, such as 12V AC/DC wall adapters,
Firewire, or automotive power.
The LTC4090 provides a Bat-Track adaptive output that
tracks the battery voltage for high efficiency charging
from the high voltage input. This 3.95V version of the
standard LTC4090 is intended for applications which
have extended battery lifetime requirements or those that
require high temperature (>60°C) operation or storage
under these conditions. A reduced float voltage will trade
off initial cell capacity for the benefit of increased capacity
retention over the life of the battery. The charge current is
programmable and an end-of-charge status output (CHRG)
indicates full charge.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and Bat-Track, PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners.
TYPICAL APPLICATION
HIGH (7.5V-36V)
VOLTAGE INPUT
5V WALL
ADAPTER
USB
59k
270pF
HVIN
1µF
IN
4.7µF
VC
TIMER
BOOST
0.47µF
SW
LTC4090-3
HVOUT
HVPR
OUT
BAT
6.8µH
22µF
1k
LOAD
4.7µF
0.1µF
RT CLPROG
40.2k
2k
GND PROG
100k +
Li-Ion BATTERY
VOUT (TYP)
VBAT + 0.3V
5V
VBAT
AVAILABLE INPUT
HV INPUT
USB ONLY
BAT ONLY
40903 TAO1
For more information www.linear.com/LTC4090-3
LTC4090-3 High Voltage Battery
Charger Efficiency
90 FIGURE 12 SCHEMATIC
80
WITH RPROG = 52k
NO OUTPUT LOAD
70
60
50
40
HVIN = 8V
30
HVIN = 12V
HVIN = 24V
HVIN = 36V
20
2.0 2.5 3.0 3.5 4.0 4.5
VBAT (V)
40903 TA01b
40903fb
1


Linear Technology Electronic Components Datasheet

LTC4090-3 Datasheet

USB Power Manager

No Preview Available !

LTC4090-3
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3, 4)
HVIN, HVEN (Note 9).................................................60V
BOOST.......................................................................56V
BOOST above SW......................................................30V
PG, SYNC...................................................................30V
IN, OUT, HVOUT
t < 1ms and Duty Cycle < 1%.................... –0.3V to 7V
Steady State............................................. –0.3V to 6V
BAT, HPWR, SUSP, VC, CHRG, HVPR............ –0.3V to 6V
NTC, TIMER, PROG, CLPROG...........–0.3V to VCC + 0.3V
IIN, IOUT, IBAT (Note 5)...............................................2.5A
Operating Temperature Range......................–40 to 85°C
Junction Temperature.............................................110°C
Storage Temperature Range....................... –65 to 125°C
PIN CONFIGURATION
TOP VIEW
SYNC 1
22 HVEN
PG 2
21 HVIN
RT 3
VC 4
NTC 5
20 SW
19 BOOST
18 HVOUT
VNTC 6
23 17 TIMER
HVPR 7
16 SUSP
CHRG 8
15 HPWR
PROG 9
14 CLPROG
GATE 10
13 OUT
BAT 11
12 IN
DJC PACKAGE
22-LEAD (6mm × 3mm) PLASTIC DFN
TJMAX = 110°C, θJA = 47°C/W
EXPOSED PAD (PIN 23) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC4090EDJC-3#PBF
TAPE AND REEL
PART MARKING
LTC4090EDJC-3#TRPBF 40903
PACKAGE DESCRIPTION
22-Lead (6mm × 3mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 85°C
LTC4090 Options
PART NUMBER
FLOAT VOLTAGE
NTC HOT THRESHOLD BAT-TRACK ADAPTIVE HV OUTPUT
LTC4090
4.2V
29% VVNTC
LTC4090-3
3.95V
32.6% VVNTC
LTC4090-5
4.2V
29% VVNTC
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
YES
YES
NO
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
40903fb
2 For more information www.linear.com/LTC4090-3


Part Number LTC4090-3
Description USB Power Manager
Maker Linear Technology
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LTC4090-3 Datasheet PDF






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