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参数资料
| 型号： | LTC3810EG |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO28 |
| 封装： | 5.30 MM, PLASTIC, SSOP-28 |
| 文件页数： | 31/36页 |
| 文件大小： | 495K |
| 代理商： | LTC3810EG |
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LTC3810
4
3810fb
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 LTC3810E 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 LTC3810I is guaranteed to meet
perfomance specications over the full –40°C to 125°C operating
temperature range.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
LTC3810: TJ = TA + (PD 100°C/W)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VPGOOD
PGOOD Low Voltage
IPGOOD = 5mA
0.3
0.6
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
0
2
μA
PG Delay
PGOOD Delay
VFB Falling
120
μs
Tracking
ISS/TRACK
SS/TRACK Source Current
VSS/TRACK > 0.5V
0.7
1.4
2.5
μA
VFB,TRACK
Feedback Voltage at Tracking
VTRACK = 0V, ITH = 1.2V (Note 4)
VTRACK = 0.5V, ITH = 1.2V (Note 4)
0.48
–0.018
0.5
0.52
V
VCC Regulators
VEXTVCC
EXTVCC Switchover Voltage
EXTVCC Rising
EXTVCC Hysteresis
l
6.4
0.1
6.7
0.3
0.5
V
VINTVCC,1
INTVCC Voltage from EXTVCC
10.5V < VEXTVCC < 15V
9.4
10
10.6
V
ΔVEXTVCC,1
VEXTVCC – VINTVCC at Dropout
ICC = 20mA, VEXTVCC = 9.1V
170
250
mV
ΔVLOADREG,1
INTVCC Load Regulation from EXTVCC
ICC = 0mA to 20mA, VEXTVCC = 12V
0.01
%
VINTVCC,2
INTVCC Voltage from NDRV Regulator
Linear Regulator in Operation
9.4
10
10.6
V
ΔVLOADREG,2
INTVCC Load Regulation from NDRV
ICC = 0mA to 20mA, VEXTVCC = 0
0.01
%
INDRV
Current into NDRV Pin
VNDRV – VINTVCC = 3V
20
40
60
μA
INDRVTO
Linear Regulator Timeout Enable
Threshold
210
270
350
μA
VCCSR
Maximum Supply Voltage
Trickle Charger Shunt Regulator
15
V
ICCSR
Maximum Current into NDRV/INTVCC
Trickle Charger Shunt Regulator,
INTVCC ≤ 16.7V (Note 8)
10
mA
The
l denotes specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C, INTVCC = DRVCC = VBOOST = VON = VRNG = SHDN = UVIN = VEXTVCC = VNDRV
= 10V, VMODE/SYNC = VSENSE+ = VSENSE– = VBGRTN = VSW = 0V, unless otherwise specied.
Note 4: The LTC3810 is tested in a feedback loop that servos VFB to the
reference voltage with the ITH pin forced to a voltage between 1V and 2V.
Note 5: The dynamic input supply current is higher due to the power
MOSFET gate charging being delivered at the switching frequency
(QG fOSC).
Note 6: Guaranteed by design. Not subject to test.
Note 7: 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.
Note 8: ICC is the sum of current into NDRV and INTVCC.
ELECTRICAL CHARACTERISTICS
PARAMETER
LTC3810
LTC3810-5
LTC3812-5
Maximum VIN
100V
60V
MOSFET Gate Drive
6.35V to 14V
4.5V to 14V
INTVCC UV+
6.2V
4.2V
INTVCC UV–
6V
4V
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