LTC4440 Ver la hoja de datos (PDF) - Linear Technology
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LTC4440 Datasheet PDF : 14 Pages
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LTC4440
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VBOOST = 12V, VTS = GND = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UVLOHS Undervoltage Lockout Threshold
VBOOST – VTS Rising
VBOOST – VTS Falling
Hysteresis
l 6.75
7.4
7.95
l 6.25
6.9
7.60
500
Input Signal (INP)
VIH
High Input Threshold
VIL
Low Input Threshold
VIH – VIL Input Voltage Hysteresis
IINP
Input Pin Bias Current
Output Gate Driver (TG)
INP Ramping High
INP Ramping Low
l 1.3
1.6
2
l 0.85 1.25 1.6
0.350
±0.01 ±2
VOH
High Output Voltage
VOL
Low Output Voltage
IPU
Peak Pull-Up Current
RDS
Output Pull-Down Resistance
Switching Timing
ITG = –10mA, VOH = VBOOST – VTG
ITG = 100mA
0.7
l
150 220
l 1.7
2.4
l
1.5
2.2
tr
Output Rise Time
10% – 90%, CL = 1nF
10% – 90%, CL = 10nF
tf
Output Fall Time
10% – 90%, CL = 1nF
10% – 90%, CL = 10nF
tPLH
Output Low-High Propagation Delay
tPHL
Output High-Low Propagation Delay
10
100
7
70
l
30
65
l
28
65
UNITS
V
V
mV
V
V
V
µA
V
mV
A
Ω
ns
ns
ns
ns
ns
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4440 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD • θJA°C/W)
Note 4: Failure to solder the exposed back side of the MS8E package to the
PC board will result in a thermal resistance much higher than 40°C/W.
Typical Performance Characteristics
VCC Supply Quiescent Current
vs Voltage
300
TA = 25°C
INP = 0V
250
INP = VCC
200
150
100
50
0
0
5
10
15
VCC SUPPLY VOLTAGE (V)
4440 G01
BOOST – TS Supply Quiescent
Current vs Voltage
500
TA = 25°C
450
400
350
300
INP = VCC
250
200
150
100
INP = 0V
50
0
0
5
10
15
BOOST – TS SUPPLY VOLTAGE (V)
4440 G02
For more information www.linear.com//LTC4440
Output Low Voltage (VOL)
vs Supply Voltage
170
ITG = 100mA
TA = 25°C
165
160
155
150
145
140
8
9 10 11 12 13 14 15
BOOST – TS SUPPLY VOLTAGE (V)
4440 G03
4440fa
3
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