参数资料
| 型号： | LTC4081EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | IC USB POWER MANAGER 10-DFN |
| 标准包装： | 2,500 |
| 功能： | 电源管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 3.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LTC4081
ELECTRICAL CHARACTERISTICS The ● denotes speci?cations which apply over the full operating tempera-
ture range, otherwise speci?cations are at T A = 25°C, V CC = 5V, V BAT = 3.8V, V ? E ? N ? _ ? C ? H ? R ? G = 0V, V NTC = 0V, V EN_BUCK = V BAT , V MODE = 0V.
(Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Buck Converter
V FB
I FB
f OSC
I BAT_NL_CF
FB Servo Voltage
FB Pin Input Current
Switching Frequency
No-Load Battery Current (Continuous
V FB = 0.85V
No-Load for Regulator, V ? E ? N ? _ ? C ? H ? R ? G = 5V,
●
●
0.78
–50
1.8
0.80
2.25
1.9
0.82
50
2.75
V
nA
MHz
mA
Frequency Mode)
L = 10μH, C = 4.7μF
I BAT_NL_BM
No-Load Battery Current (Burst Mode
No-Load for Regulator, V ? E ? N ? _ ? C ? H ? R ? G = 5V,
23
μA
Operation)
MODE = V BAT , L = 10μH, C = 4.7μF
I BAT_SLP
Battery Current in SLEEP Mode
V ? E ? N ? _ ? C ? H ? R ? G = 5V, MODE = V BAT ,
●
10
15
20
μA
V OUT > Regulation Voltage
V UVLO_BUCK
Buck Undervoltage Lockout Voltage
V BAT Rising
V BAT Falling
●
●
2.6
2.4
2.7
2.5
2.8
2.6
V
V
R ON_P
R ON_N
PMOS Switch On-Resistance
NMOS Switch On-Resistance
0.95
0.85
Ω
Ω
I LIM_P
I LIM_N
I ZERO_CF
PMOS Switch Current Limit
NMOS Switch Current Limit
NMOS Zero Current in Normal Mode
375
520
700
15
700
mA
mA
mA
I PEAK
I ZERO_BM
t SS_BUCK
Peak Current in Burst Mode Operation
Zero Current in Burst Mode Operation
Buck Soft-Start Time
MODE = V BAT
MODE = V BAT
From the Rising Edge of EN_BUCK to 90%
50
20
100
35
400
150
50
mA
mA
μs
of Buck Regulated Output
Logic
V IH
V IL
Input High Voltage
Input Low Voltage
? E ? N ? _ ? C ? H ? R ? G, EN_BUCK, MODE Pin Low to High
E ? ? N ? _ ? C ? H ? R ? G, EN_BUCK, MODE Pin High to Low
●
●
0.4
1.2
V
V
V OL
I IH
I IL
Output Low Voltage ( ? C ? H ? R ? G)
Input Current High
Input Current Low
I SINK = 5mA
EN_BUCK, MODE Pins at 5.5V, V BAT = 5V
? E ? N ? _ ? C ? H ? R ? G, EN_BUCK, MODE Pins at GND
●
●
●
–1
–1
60
105
1
1
mV
μA
μA
R ? E ? N ? _ ? C ? H ? R ? G
I ? C ? H ? R ? G
? E N ? ? _ ? C ? H ? R ? G Pin Input Resistance
? C ? H ? R ? G Pin Leakage Current
V ? E ? N ? _ ? C ? H ? R ? G = 5V
V BAT = 4.5V, V ? C ? H ? R ? G = 5V
●
1
1.45
3.3
1
M Ω
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4081 is guaranteed to meet performance speci?cations
from 0°C to 85°C. Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: Although the LTC4081 charger functions properly at 3.75V, full
charge current requires an input voltage greater than the desired ?nal
battery voltage per Δ V UVCL1 speci?cation.
Note 5: The 2.8V maximum buck undervoltage lockout (V UVLO_BUCK ) exit
threshold must ?rst be exceeded before the minimum V BAT speci?cation
applies.
Note 6: I C/10 is expressed as a fraction of measured full charge current
with indicated PROG resistor.
Note 3: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
43°C/W.
4081f
4
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