LTC4007_1 Datasheet, PDF (4/24 Pages) Linear Technology – 4A, High Efficiency, Standalone Li-Ion Battery Charger

LTC4007
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range (Note 4), otherwise specifications are at T_A = 25°C. V_DCIN = 20V, V_BAT = 12V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
V_OL
Low Logic Level of ACP, CHG, FLAG, LOBAT,
I_OL = 100µA
I_CL, FAULT
V_OH
High Logic Level of CHG, LOBAT, I_CL
I_OH = –1µA
I_OFF
Off State Leakage Current of ACP, FLAG, FAULT V_OH = 3V
I_PO
Pull-Up Current on CHG, LOBAT, I_CL
V = 0V
Timer Defeat Threshold at CHG
●
0.5
● 2.7
–1
1
– 10
1
Programming Inputs (CHEM and 3C4C)
V_IH
V_IL
I_PI
Oscillator
High Logic Level
Low Logic Level
Pull-Up Current
V = 0V
●
●1
3.3
– 14
f_OSC
Regulator Switching Frequency
f_MIN
Regulator Switching Frequency in Drop Out
DC_MAX Regulator Maximum Duty Cycle
Gate Drivers (TGATE, BGATE)
Duty Cycle ≥ 98%
V_CSP = V_BAT
255
300
345
20
25
98
99
TGTR
TGTF
BGTR
BGTF
V_TGATE High (V_CLN – V_TGATE)
V_BGATE High
V_TGATE Low (V_CLN – V_TGATE)
V_BGATE Low
TGATE Transition Time
TGATE Rise Time
TGATE Fall Time
BGATE Transition Time
BGATE Rise Time
BGATE Fall Time
V_TGATE at Shutdown (V_CLN – V_TGATE)
V_BGATE at Shutdown
I_TGATE = –1mA
C_LOAD = 3000pF
C_LOAD = 3000pF
I_BGATE = 1mA
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
C_LOAD = 3000pF, 10% to 90%
I_TGATE = –1µA, DCIN = 0V, CLN = 12V
I_BGATE = 1µA, DCIN = 0V, CLN = 12V
50
4.5
5.6
10
4.5
5.6
10
50
50
110
50
100
40
90
40
80
100
100
UNITS
V
V
µA
µA
V
V
V
µA
kHz
kHz
%
mV
V
V
mV
ns
ns
ns
ns
mV
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 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.
4007fa
4