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参数资料
| 型号： | LTC3605IUF#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 7.5 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件页数： | 16/22页 |
| 文件大小： | 257K |
| 代理商： | LTC3605IUF#TRPBF |
LTC3605
3
3605fb
ELECTRICAL CHARACTERISTICS
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. Absolute Maximum Ratings are those values beyond
which the life of a device may be impaired.
Note 2: The LTC3605E is guaranteed to meet performance specications
from 0°C to 85°C. Specications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3605I is guaranteed over the full
–40°C to 125°C operating temperature range.
Note 3: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PVIN
VIN Supply Range
415
V
IQ
Input DC Supply Current
Active
Shutdown
(Note 3)
Mode = 0, RT = 162k
VIN =12V, RUN = 0
2
11
5
40
mA
μA
VFB
Feedback Reference Voltage
ITH =1.2V (Note 4) –40°C to 85°C
ITH =1.2V (Note 4) –40°C to 125°C
l
0.594
0.592
0.600
0.606
0.608
V
ΔVFB(LINE)
Feedback Voltage Line
Regulation
VIN = 4V to 15V, ITH = 1.2V, –40°C to 85°C
VIN = 4V to 15V, ITH = 1.2V, –40°C to 125°C
l
0.001
0.04
0.02
0.1
%/V
ΔVFB(LOAD) Feedback Voltage Load
Regulation
ITH = 0.8V to 1.6V, –40°C to 85°C
ITH = 0.8V to 1.6V, –40°C to 125°C
l
0.1
0.2
0.3
%
IFB
Feedback Pin Input Current
±30
nA
gm (EA)
Error Amplier Transconductance
ITH = 1.2V
1.15
1.35
1.6
mS
tON(MIN)
Minimum On-Time
40
ns
tOFF(MIN)
Minimum Off-Time
70
ns
ILIM
Positive Inductor Valley Current Limit
VFB = 0.57V
5
6
7.5
A
RTOP
Top Power NMOS On-Resistance
INTVCC = 3.3V
70
150
m
Ω
RBOTTOM
Bottom Power NMOS On-Resistance
INTVCC = 3.3V
35
55
m
Ω
VUVLO
INTVCC Undervoltage Lockout
Threshold
INTVCC Falling
INTVCC Hysteresis (Rising)
2.4
2.6
0.25
2.8
V
VRUN
Run Threshold 2 (IQ = 2mA)
Run Threshold 1 (IQ = 400μA)
RUN Rising
1.2
0.45
1.25
0.6
1.3
0.75
V
VINTVCC
Internal VCC Voltage
4V < VIN < 15V
3.2
3.3
3.4
V
ΔVINTVCC
INTVCC Load Regulation
ILOAD = 0mA to 20mA
0.5
%
OV
Output Overvoltage
PGOOD Upper Threshold
VFB Rising
7
10
13
%
UV
Output Undervoltage
PGOOD Lower Threshold
VFB Falling
–13
–10
–7
%
ΔVFB(HYS)
PGOOD Hysteresis
VFB Returning
1.5
%
RPGOOD
PGOOD Pull-Down Resistance
1mA Load
12
25
Ω
IPGOOD
PGOOD Leakage
0.54V < VFB < 0.66V
2
μA
ITRACK/SS
TRACK Pull-Up Current
2.5
4
μA
fOSC
Oscillator Frequency
RT = 162k
l
0.85
1
1.2
MHz
CLKIN
CLKIN Threshold
0.7
V
The
l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C.
Note 4: The LTC3605 is tested in a feedback loop that adjusts VFB to
achieve a specied error amplier output voltage (ITH).
Note 5: TJ is calculated from the ambient temperature TA and
power dissipation as follows: TJ = TA + PD (37°C/W). See Thermal
Considerations section.
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active
Continuous operation above the specied maximum operating junction
temperature may impair device reliability.
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