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LTC1960 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC1960
Description  Dual Battery Charger/Selector with SPI Interface
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1960 Datasheet(HTML) 3 Page - Linear Technology

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LTC1960
3
1960fa
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range (Note 7), otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT1 = 12V, VBAT2 = 12V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply and Reference
Battery Operating Voltage Range
Battery Selected, PowerPath Function (Note 2)
6
28
V
Battery Drain Current
Battery Selected, Not Charging, VDCIN = 0V
175
µA
VPLUS Diodes Forward Voltage:
VFDC
DCIN to VPLUS
IVCC = 10mA
0.8
V
VFB1
BAT1 to VPLUS
IVCC = 0mA
0.7
V
VFB2
BAT2 to VPLUS
IVCC = 0mA
0.7
V
VFSCN
SCN to VPLUS
IVCC = 0mA
0.7
V
UVLO
Undervoltage Lockout Threshold
VPLUS Ramping Down, Measured at VPLUS to GND ●
3
3.5
3.9
V
UVHYS
UV Lockout Hysteresis
VPLUS Rising, Measured at VPLUS to GND
60
mV
VVCC
VCC Regulator Output Voltage
5
5.2
5.4
V
VLDR
VCC Load Regulation
IVCC = 0mA to 10mA
0.2
1
%
Switching Regulator
VTOL
Overall Voltage Accuracy
5V
≤ VOUT < 25V, (Note 3)
–0.8
0.8
%
●
–1
1
%
ITOL
Overall Current Accuracy
IDAC Value = 3FFHEX
–5
5
%
VCSP, VCSN = 12V
●
–6
6
%
f0SC
Regulator Switching Frequency
255
300
345
kHz
fDO
Regulator Switching Frequency in Low
Duty Cycle
≥99%
20
25
kHz
Dropout Mode
DCMAX
Regulator Maximum Duty Cycle
99
99.5
%
IMAX
Maximum Current Sense Threshold
VITH = 2.2V
140
155
190
mV
ISNS
CA1 Input Bias Current
VCSP = VCSN > 5V
150
µA
CMSL
CA1/I1 Input Common Mode Low
0
V
CMSH
CA1/I1 Input Common Mode High
VDCIN–0.2
V
VCL1
CL1 Turn-On Threshold
95
100
105
mV
TGATE Transition Time:
TG tr
TGATE Rise Time
CLOAD = 3300pF, 10% to 90%
50
90
ns
TG tf
TGATE Fall Time
CLOAD = 3300pF, 10% to 90%
50
90
ns
BGATE Transition Time:
BG tr
BGATE Rise Time
CLOAD = 3300pF, 10% to 90%
50
90
ns
BG tf
BGATE Fall Time
CLOAD = 3300pF, 10% to 90%
40
80
ns
Trip Points
VTR
DCDIV/LOPWR Threshold
VDCDIV or VLOPWR Falling
●
1.166
1.19
1.215
V
VTHYS
DCDIV/LOPWR Hysteresis Voltage
VDCDIV or VLOPWR Rising
30
mV
IBVT
DCDIV/LOPWR Input Bias Current
VDCDIV or VLOPWR = 1.19V
20
200
nA
VTSC
Short-Circuit Comparator Threshold
VSCP – VSCN, VCC ≥ 5V
●
90
100
115
mV
VFTO
Fast Power Path Turn-Off Threshold
VDCDIV Rising from VCC
6
7
7.9
V
VOVSD
Overvoltage Shutdown Threshold as a
VSET Rising from 0.8V until TGATE and BGATE
107
%
Percent of Programmed Charger Voltage
Stop Switching
DACs
IRES
IDAC Resolution
Guaranteed Monotonic Above IMAX/16
10
bits
IDAC Pulse Period:
tIP
Normal Mode
610
15
µs
tILOW
Low Current Mode
50
ms



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