Linear Technology LTC1760, Manual

Page: 5 / 48

LTC1760
5
1760fc
For more information www.linear.com/LTC1760
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
COFF
CH Gate Off Voltage
GCH1
GCH2
I
LOAD
=10µA
V
GCH1
– V
SCH1
V
GCH2
– V
SCH2
–0.8
–0.8
–0.4
–0.4
0
0
V
V
V
TOC
CH Switch Reverse Turn-Off Voltage V
BATX
– V
CSN
, 5V ≤ V
BATX
≤ 28V
C-Grade (Note 6)
I-Grade (Note 6)
l
l
5
2
20
20
40
40
mV
mV
V
FC
CH Switch Forward Regulation Voltage V
CSN
– V
BATX
, 5V ≤ V
BATX
≤ 28V
l
15 35 60 mV
I
OC(SRC)
I
OC(SNK)
GCH1/GCH2 Active Regulation:
Max Source Current
Max Sink Current
V
GCHX
– V
SCHX
= 1.5V
–2
2
µA
µA
V
CHMIN
BATX Voltage Below Which
Charging is Inhibited
(Note 14) 3.5 4.7 V
PowerPath Switches
t
DLY
Blanking Period after UVLO Trip Switches Held Off 250 ms
t
PPB
Blanking Period after LOPWR Trip Switches in 3-Diode Mode 1 sec
t
ONPO
GB1O/GB2O/GDCO Turn-On Time V
GS
< –3V, from Time of Battery/DC
Removal, or LOPWR Indication, C
LOAD
= 3000pF
l
5 10 µs
t
OFFPO
GB1O/GB2O/GDCO Turn-Off Time V
GS
> –1V, from Time of Battery/DC
Removal, or LOPWR Indication, C
LOAD
= 3000pF
l
3 7 µs
V
PONO
Output Gate Clamp Voltage
GB1O
GB2O
GDCO
I
LOAD
= 1µA
Highest (V
BAT1
or V
SCP
) – V
GB1O
Highest (V
BAT2
or V
SCP
) – V
GB2O
Highest (V
DCIN
or V
SCP
) – V
GDCO
4.75
4.75
4.75
6.25
6.25
6.25
7
7
7
V
V
V
V
POFFO
Output Gate Off Voltage
GB1O
GB2O
GDCO
I
LOAD
= –25µA
Highest (V
BAT1
or V
SCP
) – V
GB1O
Highest (V
BAT2
or V
SCP
) – V
GB2O
Highest (V
DCIN
or V
SCP
) – V
GDCO
0.18
0.18
0.18
0.25
0.25
0.25
V
V
V
V
TOP
PowerPath Switch Reverse
Turn-Off Voltage
V
SCP
– V
BATX
or V
SCP
– V
DCIN
6V ≤ V
SCP
≤ 28V
C-Grade (Note 6)
I-Grade (Note 6)
l
l
5
2
20
20
60
60
mV
mV
V
FP
PowerPath Switch Forward
Regulation Voltage
V
BATX
– V
SCP
or V
DCIN
– V
SCP
6V ≤ V
SCP
≤ 28V
l
0 25 50 mV
I
OP(SRC)
I
OP(SNK)
GDCI/GB1I/GB2I Active Regulation:
Source Current
Sink Current
(Note 3)
–4
75
µA
µA
t
ONPI
Gate B1I/B2I/DCI Turn-On Time V
GS
< –3V, C
LOAD
= 3000pF (Note 4) 300 µs
t
OFFPI
Gate B1I/B2I/DCI Turn-Off Time V
GS
> –1V, C
LOAD
= 3000pF (Note 4) 10 µs
V
PONI
Input Gate Clamp Voltage
GB1I
GB2I
GDCI
I
LOAD
= 1µA
Highest (V
BAT1
or V
SCP
) – V
GB1I
Highest (V
BAT2
or V
SCP
) – V
GB2I
Highest (V
DCIN
or V
SCP
) – V
GDCI
4.75
4.75
4.75
6.7
6.7
6.7
7.5
7.5
7.5
V
V
V
V
POFFI
Input Gate Off Voltage
GB1I
GB2I
GDCI
I
LOAD
= –25µA
Highest (V
BAT1
or V
SCP
) – V
GB1I
Highest (V
BAT2
or V
SCP
) – V
GB2I
Highest (V
DCIN
or V
SCP
) – V
GDCI
0.18
0.18
0.18
0.25
0.25
0.25
V
V
V
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 6). V
DCIN
= 20V, V
BAT1
= 12V, V
BAT2
= 12V, V
VDDS
= 3.3V,
V
VCC2
= 5.2V unless otherwise noted.