LTC1760 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1760' PDF : 48 Pages View PDF
LTC1760
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 6). VDCIN = 20V, VBAT1 = 12V, VBAT2 = 12V, VVDDS = 3.3V,
VVCC2 = 5.2V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply and Reference
DCIN Operating Range
DCIN Selected
6
28
V
ICH0
ICH1
IVCC2_AC1
IVCC2_AC0
DCIN Operating Current
VCC2 Operating Current
Battery Operating Voltage Range
Not Charging (DCIN Selected) (Note 10)
Charging (DCIN Selected) (Note 10)
AC Present (Note 11)
AC Not Present (Note 11)
Battery Selected, PowerPath Function
Battery Selected, Charging Function (Note 2)
1
1.5
mA
1.3
2
mA
0.75
1
mA
75
100
μA
6
28
V
0
28
V
IBAT
Battery Drain Current
Battery Selected, Not Charging, VDCIN = 0V (Note 10)
175
μA
VFDC
VFB1
VFB2
VFSCN
VPLUS Diodes Forward Voltage:
DCIN to VPLUS
BAT1 to VPLUS
BAT2 to VPLUS
SCN to VPLUS
IVCC = 10mA
IVCC = 0mA
IVCC = 0mA
IVCC = 0mA
0.8
V
0.7
V
0.7
V
0.7
V
UVLO Undervoltage Lockout Threshold
VPLUS Ramping Down, Measured at VPLUS to GND
l
3
5
V
VVCC
VCC Regulator Output Voltage
l 4.9
5.2
5.5
V
VLDR
VCC Load Regulation
IVCC = 0mA to 10mA
l
0.2
1
%
Switching Regulator
VTOL
Voltage Accuracy
With Respect to Voltage Reported by Battery
VCHMIN < Requested Voltage < VLIMIT
l –32
32
mV
ITOL
Current Accuracy
With Respect to Current Reported by Battery
4mV/RSENSE < Requested Current < ILIMIT (Min)
(Note 12)
RILIMIT = 0 (Short to GND)
RILIMIT = 10k ±1%
RILIMIT = 33k ±1%
RILIMIT = Open (or Short ILIMIT to VCC2)
l –2
l –4
l –8
l –8
2
mA
4
mA
8
mA
8
mA
f0SC
Regulator Switching Frequency
255
300
345
kHz
fDO
Regulator Switching Frequency in Low Duty Cycle ≥99%
Dropout Mode
20
25
kHz
DCMAX
IMAX
ISNS
CMSL
Regulator Maximum Duty Cycle
Maximum Current Sense Threshold
CA1 Input Bias Current
CA1 Input Common Mode Low
VITH = 2.2V
VCSP = VCSN > 5V
99
99.5
%
140
155
190
mV
150
μA
0
V
CMSH
VCL1
CA1 Input Common Mode High
CL1 Turn-On Threshold
C-Grade (Note 6)
I-Grade (Note 6)
95
l 94
l 90
VDCIN – 0.2
V
100 105
mV
100 108
mV
100 108
mV
TGATE Transition Time:
TG tr
TGATE Rise Time
TG tr
TGATE Fall Time
CLOAD = 3300pF, 10% to 90%
CLOAD = 3300pF, 10% to 90%
50
90
50
90
ns
ns
BGATE Transition Time
BG tr
BGATE Rise Time
BG tf
BGATE Fall Time
CLOAD = 3300pF, 10% to 90%
CLOAD = 3300pF, 10% to 90%
50
90
ns
40
80
ns
1760fa
3
Share Link: 
