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LTC4090EDJC-3#TRPBF

Description
IC USB POWER MANAGER 22DFN
Categorysemiconductor    Power management   
File Size514KB,30 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC4090EDJC-3#TRPBF Overview

IC USB POWER MANAGER 22DFN

LTC4090EDJC-3#TRPBF Parametric

Parameter NameAttribute value
FunctionPower management
battery chemistryLi-ion/polymer
Number of batteries1
failsafeOvercurrent, overtemperature
interfaceUSB
Operating temperature-40°C ~ 85°C(TA)
Package/casing22-WFDFN Exposed Pad
Supplier device packaging22-DFN(6x3)
FEATURES
n
n
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 Analog Devices, Inc. All other
trademarks are the property of their respective owners.
n
n
n
n
n
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Seamless Transition Between Power Sources:
Li-Ion Battery, USB, and 6V to 36V Supply (60V Max)
2A Output High Voltage Buck Regulator with
Bat-Track™ Adaptive Output Control
3.95V Float Voltage Improves Battery Life Span and
High Temperature Safety Margin
Internal 215mΩ Ideal Diode Plus Optional External
Ideal Diode Controller Provides Low Loss
PowerPath™ When External Supply/ USB Not Present
Load Dependent Charging from USB Input Guaran-
tees Current Compliance
Full Featured Li-Ion Battery Charger
1.5A Maximum Charge Current with Thermal Limiting
NTC Thermistor Input for Temperature Qualified
Charging
Tiny (3mm
×
6mm
×
0.75mm) 22-Pin DFN Package
APPLICATIONS
n
n
n
Embedded Automotive Accessories
Personal Navigation Devices
Other USB-Based Handheld Products
TYPICAL APPLICATION
0.47µF
HIGH (7.5V-36V)
VOLTAGE INPUT
5V WALL
ADAPTER
USB
4.7µF
V
C
TIMER
RT
0.1µF
40.2k
CLPROG
2k
GND
HVIN
1µF
HVOUT
IN
LTC4090-3
OUT
4.7µF
BAT
PROG
100k
HVPR
1k
LOAD
EFFICIENCY (%)
BOOST
SW
6.8µH
22µF
90
LTC4090-3 High Voltage Battery
Charger Efficiency
FIGURE 12 SCHEMATIC
WITH R
PROG
= 52k
80 NO OUTPUT LOAD
70
60
50
40
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
2.5
3.5
3.0
V
BAT
(V)
4.0
4.5
40903 TA01b
59k
270pF
+
Li-Ion BATTERY
30
20
2.0
V
OUT
(TYP)
V
BAT
+ 0.3V
5V
V
BAT
AVAILABLE INPUT
HV INPUT
USB ONLY
BAT ONLY
40903 TAO1
40903fc
For more information
www.linear.com/LTC4090-3
1

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LTC4090EDJC-3#TRPBF LTC4090EDJC-3#PBF
Description IC USB POWER MANAGER 22DFN IC USB POWER MANAGER 22DFN
Function Power management Power management
battery chemistry Li-ion/polymer Li-ion/polymer
Number of batteries 1 1
failsafe Overcurrent, overtemperature Overcurrent, overtemperature
interface USB USB
Operating temperature -40°C ~ 85°C(TA) -40°C ~ 85°C(TA)
Package/casing 22-WFDFN Exposed Pad 22-WFDFN Exposed Pad
Supplier device packaging 22-DFN(6x3) 22-DFN(6x3)
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