Datasheet

LTC4007
4
4007fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range (Note 4), otherwise specifi cations are at T
A
= 25°C. V
DCIN
= 20V, V
BAT
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OL
Low Logic Level of ACP, CHG, FLAG, LOBAT,
I
CL
, FAULT
I
OL
= 100μA
l
0.5 V
V
OH
High Logic Level of CHG, LOBAT, I
CL
I
OH
= –1μA
l
2.7 V
I
OFF
Off State Leakage Current of ACP, FLAG, FAULT V
OH
= 3V –1 1 μA
I
PO
Pull-Up Current on CHG, LOBAT, I
CL
V = 0V –10 μA
Charge Termination Defeat Threshold at CHG 1 V
Programming Inputs (CHEM and 3C4C)
V
IH
High Logic Level
l
3.3 V
V
IL
Low Logic Level
l
1V
I
PI
Pull-Up Current V = 0V –14 μA
Oscillator
f
OSC
Regulator Switching Frequency 255 300 345 kHz
f
MIN
Regulator Switching Frequency in Drop Out Duty Cycle ≥ 98% 20 25 kHz
DC
MAX
Regulator Maximum Duty Cycle V
CSP
= V
BAT
98 99 %
Gate Drivers (TGATE, BGATE)
V
TGATE
High (V
CLN
– V
TGATE
)I
TGATE
= –1mA 50 mV
V
BGATE
High C
LOAD
= 3000pF 4.5 5.6 10 V
V
TGATE
Low (V
CLN
– V
TGATE
)C
LOAD
= 3000pF 4.5 5.6 10 V
V
BGATE
Low I
BGATE
= 1mA 50 mV
TGTR
TGTF
TGATE Transition Time
TGATE Rise Time
TGATE Fall Time
C
LOAD
= 3000pF, 10% to 90%
C
LOAD
= 3000pF, 10% to 90%
50
50
110
100
ns
ns
BGTR
BGTF
BGATE Transition Time
BGATE Rise Time
BGATE Fall Time
C
LOAD
= 3000pF, 10% to 90%
C
LOAD
= 3000pF, 10% to 90%
40
40
90
80
ns
ns
V
TGATE
at Shutdown (V
CLN
– V
TGATE
)I
TGATE
= –1μA, DCIN = 0V, CLN = 12V 100 mV
V
BGATE
at Shutdown I
BGATE
= 1μA, DCIN = 0V, CLN = 12V 100 mV
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: See Test Circuit.
Note 3: Does not include tolerance of current sense resistor or current
programming resistor.
Note 4: The LTC4007E is guaranteed to meet performance specifi cations
from 0°C to 70°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.