Datasheet

LTC4440
3
4440fa
For more information www.linear.com//LTC4440
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
UVLO
HS
Undervoltage Lockout Threshold V
BOOST
– V
TS
Rising
V
BOOST
– V
TS
Falling
Hysteresis
l
l
6.75
6.25
7.4
6.9
500
7.95
7.60
V
V
mV
Input Signal (INP)
V
IH
High Input Threshold INP Ramping High
l
1.3 1.6 2 V
V
IL
Low Input Threshold INP Ramping Low
l
0.85 1.25 1.6 V
V
IH
– V
IL
Input Voltage Hysteresis 0.350 V
I
INP
Input Pin Bias Current ±0.01 ±2 µA
Output Gate Driver (TG)
V
OH
High Output Voltage I
TG
= –10mA, V
OH
= V
BOOST
– V
TG
0.7 V
V
OL
Low Output Voltage I
TG
= 100mA
l
150 220 mV
I
PU
Peak Pull-Up Current
l
1.7 2.4 A
R
DS
Output Pull-Down Resistance
l
1.5 2.2 Ω
Switching Timing
t
r
Output Rise Time 10% – 90%, C
L
= 1nF
10% – 90%, C
L
= 10nF
10
100
ns
ns
t
f
Output Fall Time 10% – 90%, C
L
= 1nF
10% – 90%, C
L
= 10nF
7
70
ns
ns
t
PLH
Output Low-High Propagation Delay
l
30 65 ns
t
PHL
Output High-Low Propagation Delay
l
28 65 ns
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= V
BOOST
= 12V, V
TS
= GND = 0V, unless otherwise noted.
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: T
J
is calculated from the ambient temperature T
A
and power
dissipation PD according to the following formula:
T
J
= T
A
+ (PD • θ
JA
°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
V
CC
Supply Quiescent Current
vs Voltage
BOOST – TS Supply Quiescent
Current vs Voltage
Output Low Voltage (V
OL
)
vs Supply Voltage
V
CC
SUPPLY VOLTAGE (V)
0
0
QUIESCENT CURRENT (µA)
50
100
150
200
300
5 10
4440 G01
15
250
INP = V
CC
INP = 0V
T
A
= 25°C
BOOST – TS SUPPLY VOLTAGE (V)
0
0
QUIESCENT CURRENT (µA)
100
150
200
250
300
350
5
10
4440 G02
400
450
INP = 0V
500
50
15
INP = V
CC
T
A
= 25°C
BOOST – TS SUPPLY VOLTAGE (V)
8
OUTPUT (TG – TS) VOLTAGE (mV)
150
155
160
165
170
11 13
4440 G03
145
140
9 10
12 14
15
I
TG
= 100mA
T
A
= 25°C