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PDF LTC3677-3 Data sheet ( Hoja de datos )
| Número de pieza | LTC3677-3 | |
| Descripción | Highly Integrated Portable Product PMIC | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Features
n Full Featured Li-Ion/Polymer Charger/PowerPath™
Controller with Instant-On Operation
n Triple Adjustable High Efficiency Step-Down
n
Switching Regulators (800mA,
I2C Adjustable SW Slew Rates
500mA, 500mA IOUT)
for EMI Reduction
n High Temperature Battery Voltage Reduction
Improves Safety and Reliability
n Overvoltage Protection Controller for USB (VBUS)/Wall
Inputs Provide Protection to 30V
n 1.5A Maximum Charge Current with Thermal Limiting
n Battery Float Voltage: 4.2V
n Pushbutton ON/OFF Control with System Reset
n Dual 150mA Current Limited LDOs
n Start-Up Timing Compatible with SiRF Atlas IV
Processor
n Small 4mm × 7mm 44-Pin QFN Package
Applications
n PNDs, DMB/DVB-H, Digital/Satellite Radio,
Media Players
n Portable Industrial/Medical Products
n Other USB-Based Handheld Products
LTC3677-3www.DataSheet4U.com
Highly Integrated
Portable Product PMIC
Description
The LTC®3677-3 is a highly integrated power management
IC for single-cell Li-Ion/Polymer battery applications.
It includes a PowerPath manager with automatic load
prioritization, a battery charger, an ideal diode, input over-
voltage protection and numerous other internal protection
features. The LTC3677-3 is designed to accurately charge
from current limited supplies such as USB by automatically
reducing charge current such that the sum of the load
current and the charge current does not exceed the pro-
grammed input current limit (100mA or 500mA modes).
The LTC3677-3 reduces the battery voltage at elevated
temperatures to improve safety and reliability. The three
step-down switching regulators and two LDOs provide
a wide range of available supplies. The LTC3677-3 also
includes a pushbutton input to control power sequencing
and system reset. The LTC3677-3 has pushbutton tim-
ing and sequencing designed to support the SiRF Atlas
IV processor. The LTC3677-3 is available in a low profile
4mm × 7mm × 0.75mm 44-pin QFN package.
L, LT, LTC, LTM, Linear Technology, PowerPath, Burst Mode and the Linear logo are registered
trademarks and Bat-Track and Hot Swap are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6522118, 6700364, 7511390, 5481178, 6580258. Other patents pending.
Typical Application
5V
ADAPTER
OPTIONAL
USB
OVERVOLTAGE
PROTECTION
CHARGE
2
PB
100mA/500mA
1000mA
CC/CV
CHARGER
LTC3677-3
0V
NTC
VOUT
+ SINGLE-CELL
Li-Ion
I2C PORT
PUSHBUTTON
CONTROL
DUAL LDO
REGULATORS
TRIPLE HIGH
EFFICIENCY
STEP-DOWN
SWITCHING
REGULATORS
36773 TA01a
0.8V to 3.6V/150mA
0.8V to 3.6V/150mA
0.8V to 3.6V/800mA
0.8V to 3.6V/500mA
0.8V to 3.6V/500mA
High Temperature BAT Discharge
200
180
VNTC < VTOO_HOT
VBUS = 0V
160
140
120
100
80
60
40
20
0
3.8 3.9 4.0
VBAT (V)
4.1 4.2
36773 TA01b
36773f
1 page  
LTC3677-3www.DataSheet4U.com
Electrical Characteristics Power Manager. The l denotes the specifications which apply over the
fWulAlLoLpe=r0aVti,nVgINjuLDnOct2io=nVtIeNmLOpDe1ra=tVurINe1r2a=ngVeIN,3o=thVerOwUTi,seRPsRpOeGci=fic2akt,ioRnCsLPaRreOGat=T2J.1=k2,5u°nCl.eVssBUoSth=er5wV,isVeBAnTo=te3d..8V, ILIM0 = ILIM1 = 5V,
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
NTC, Battery Discharge Protection
VCOLD
VHOT
VTOO_HOT
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Discharge Threshold Voltage
Rising NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
Falling NTC Voltage
Hysteresis
75
76
1.3
77 %%VVNNTTCCBBIIAASS
34 35 36 %VNTCBIAS
1.3 %VNTCBIAS
24.5
25.5
26.5 %VNTCBIAS
50 mV
INTC
IBAT2HOT
VBAT2HOT
Ideal Diode
NTC Leakage Current
BAT Discharge Current
BAT Discharge Threshold
VNTC = VBUS = 5V
VBAT = 4.1V, NTC < VTOO_HOT
IBAT < 0.1mA, NTC < VTOO_HOT
–50
170
3.9
50
nA
mA
V
VFWD
Forward Voltage Detection
RDROPOUT
Diode On-Resistance, Dropout
IMAX Diode Current Limit
Overvoltage Protection
IOUT = 10mA
IOUT = 200mA
(Note 7)
5 15 25
200
3.6
mV
mΩ
A
VOVCUTOFF
VOVGATE
Overvoltage Protection Threshold
OVGATE Output Voltage
IOVSENSQ
OVSENS Quiescent Current
tRISE OVGATE Time to Reach Regulation
Wall Adapter and High Voltage Buck Output Control
Rising Threshold, ROVSENS = 6.2k
Input Below VOVCUTOFF
Input Above VOVCUTOFF
VOVSENS = 5V
COVGATE = 1nF
6.10
6.35 6.70
1.88 • VOVSENS 12
0
40
2.5
V
V
V
µA
ms
VACPR
VW
ACPR Pin Output High Voltage
ACPR Pin Output Low Voltage
Absolute Wall Input Threshold Voltage
∆VW
IQWALL
Differential Wall Input Threshold
Voltage
Wall Operating Quiescent Current
Logic (ILIM0, ILIM1 and CHRG)
VIL Input Low Voltage
VIH Input High Voltage
IPD Static Pull-Down Current
VCHRG
CHRG Pin Output Low Voltage
ICHRG
CHRG Pin Input Current
IACPR = 0.1mA
IACPR = 1mA
VWALL Rising
VWALL Falling
VWALL – VBAT Falling
VWALL – VBAT Rising
IWALL + IVOUT , IBAT = 0mA,
WALL = VOUT = 5V
ILIM0, ILIM1
ILIM0, ILIM1
ILIM0, ILIM1; VPIN = 1V
ICHRG = 10mA
VBAT = 4.5V, VCHRG = 5V
VOUT – 0.3
3.1
0
VOUT
0
4.3
3.2
25
75
440
0.3
4.45
100
0.4
1.2
2
0.15 0.4
01
V
V
V
V
mV
mV
µA
V
V
µA
V
µA
36773f
5 Page 
LTC3677-3www.DataSheet4U.com
Typical Performance Characteristics TJ = 25°C unless otherwise specified
Input Current Limit
vs Temperature
1200
1100
1000
VBUS = 5V
RCLPROG = 2.1k
10x MODE
900
800
700
600
500
5x MODE
400
300
200
100 1x MODE
0
–50 –25 0
25 50
75 100 125
TEMPERATURE (°C)
36773 G04
Input RON vs Temperature
300
280 IOUT = 400mA
260
240 VBUS = 4.5V
220 VBUS = 5V
180
160 VBUS = 5.5V
140
120
100
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
36773 G05
Charge Current vs Temperature
(Thermal Regulation)
600
500
400
300
200
100
VBUS = 5V
10x MODE
RPROG = 2k
0
–50 –25 0
25 50
75
TEMPERATURE (°C)
100 125
357734 G06
Battery Current and Voltage
vs Time
600
500 CHRG
VBAT
400
6
5
4
300 3
200 1450mAhr
CELL
100 VBUS = 5V
RPROG = 2k
0 RCLPROG = 2k
012
SAFETY
TIMER 2
TERMINATION
C/10 1
IBAT
0
34
56
TIME (HOUR)
36773 G07
Battery Float Voltage
Load Regulation
4.24
VBUS = 5V
4.22 10x MODE
4.20
4.18
4.16
4.14
4.12
4.10
0
200 400 600
IBAT (mA)
800 1000
357734 G08
Battery Regulation (Float)
Voltage vs Temperature
4.24
4.22 IBAT = 2mA
4.20
4.18
4.16
4.14
4.12
4.10
4.08
4.06
4.04
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
36773 G09
IBAT vs VBAT
600
500
400
300 FALLING
VBAT
200
RISING
VBAT
VBUS = 5V
100 10x MODE
RPROG = 2k
RCLPROG = 2k
0
2.0 2.4 2.8 3.2 3.6 4.0 4.4
VBAT (V)
36773 G10
Forward Voltage vs Ideal Diode
Current (No External FET)
0.25 VBUS = 0V
TA = 25°C
VBAT = 3.2V
0.20
VBAT = 3.6V
VBAT = 4.2V
0.15
0.10
0.05
0
0 0.2 0.4 0.6 0.8 1.0 1.2
IBAT (A)
36773 G11
Forward Voltage vs Ideal Diode
Current (with Si2333DS External FET)
40
VBAT = 3.8V
35
VBUS = 0V
TA = 25°C
30
25
20
15
10
5
0
0 0.2 0.4 0.6 0.8 1.0
IBAT (A)
36773 G12
36773f
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC3677-3.PDF ] | |
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