LTC4101EG Просмотр технического описания (PDF) - Linear Technology
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LTC4101EG Datasheet PDF : 30 Pages
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LTC4101
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDCIN = 20V, VDD = 3.3V, VBAT = 4V unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Current Sense Amplifier, CA1
Input Bias Current into BAT Pin
11.66
μA
CMSL CA1/I1 Input Common Mode Low
CMSH CA1/I1 Input Common Mode High
Current Comparators IREV
VDCIN ≤ 28V
l0
l
V
VCLN–0.2
V
ITREV Reverse Current Threshold (VCSP-VBAT)
Current Sense Amplifier, CA2
–30
mV
Transconductance
1
mmho
Source Current
Sink Current
Current Limit Amplifier
Measured at ITH, VITH = 1.4V
Measured at ITH, VITH = 1.4V
–40
μA
40
μA
Transconductance
1.5
mmho
VCLP
Current Limit Threshold
ICLN
CLN Input Bias Current
l 93
100
107
mV
50
nA
Voltage Error Amplifier, EA
Transconductance
1
mmho
OVSD
Sink Current
Measured at ITH, VITH = 1.4V
Overvoltage Shutdown Threshold as a Percent
of Programmed Charger Voltage
36
μA
l 102
107
110
%
Input P-Channel FET Driver (INFET)
DCIN Detection Threshold (VDCIN-VCLP)
DCIN Voltage Ramping Up
from VCLP-0.05V
Forward Regulation Voltage (VDCIN-VCLP)
Reverse Voltage Turn-Off Voltage (VDCIN-VCLP)
l0
0.17
0.25
V
l
25
50
mV
l –60
–25
mV
INFET ON Clamping Voltage (VDCIN-VINFET)
INFET OFF Clamping Voltage (VDCIN-VINFET)
Oscillator
IINFET = 1μA
IINFET = –25μA
l5
5.8
6.5
V
0.25
V
fOSC
fMIN
DCMAX
Regulator Switching Frequency
Regulator Switching Frequency in Drop Out
Regulator Maximum Duty Cycle
Duty Cycle ≥ 98%
VCSP = VBAT
255
300
345
kHz
20
25
kHz
98
99
%
Gate Drivers (TGATE, BGATE)
VTGATE High (VCLP-VTGATE)
VBGATE High
ITGATE = –1mA
CLOAD = 3000pF
50
mV
4.5
5.6
10
V
TGTR
TGTF
BGTR
BGTF
VTGATE Low (VCLP-VTGATE)
VBGATE Low
TGATE Transition Time
TGATE Rise Time
TGATE Fall Time
BGATE Transition Time
BGATE Rise Time
BGATE Fall Time
VTGATE at Shutdown (VCLN-VTGATE)
CLOAD = 3000pF
IBGATE = 1mA
CLOAD = 3000pF, 10% to 90%
CLOAD = 3000pF, 10% to 90%
CLOAD = 3000pF, 10% to 90%
CLOAD = 3000pF, 10% to 90%
ITGATE = –1μA
4.5
5.6
10
V
50
mV
50
110
ns
50
100
ns
40
90
ns
40
80
ns
100
mV
4101fa
3
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