Datasheet

LTC1960
4
1960fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DACs
I
RES
IDAC Resolution Guaranteed Monotonic Above I
MAX
/16 10 bits
t
IP
t
ILOW
IDAC Pulse Period:
Normal Mode
Low Current Mode
6 10
50
15 µs
ms
V
RES
VDAC Resolution Guaranteed Monotonic (5V < V
BAT
< 25V) 11 bits
V
STEP
VDAC Granularity 16 mV
V
OFF
VDAC Offset (Note 6) 0.8 V
t
VP
VDAC Pulse Period 7 11 16.5 µs
Charge MUX Switches
t
ONC
GCH1/GCH2 Turn-On Time V
GCHX
– V
SCHX
> 3V, C
LOAD
= 3nF 5 10 ms
t
ONC
GCH1/GCH2 Turn-Off Time V
GCHX
– V
SCHX
< 1V, from Time of V
CSN
<
V
BATX
– 30mV, C
LOAD
= 3nF
3 7 µs
V
CON
CH Gate Clamp Voltage
GCH1
GCH2
I
LOAD
= 1µA
V
GCH1
– V
SCH1
V
GCH2
– V
SCH2
5
5
5.8
5.8
7
7
V
V
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
CSN
– V
BATX
, 5V ≤ V
BATX
≤ 28V
l
5 20 40 mV
V
FC
CH Switch Forward Regulation Voltage V
BATX
– V
CSN
, 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 8) 3.5 4.7 V
PowerPath Switches
t
D LY
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
l
5 10 µs
t
OFFPO
GB1O/GB2O/GDCO Turn-Off Time V
GS
> –1V, from Time of Battery/DC
Removal, or LOPWR Indication
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
l
5 20 60 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 4)
–4
75
µA
µA
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range (Note 7), otherwise specifications are at T
A
= 25°C. V
DCIN
= 20V, V
BAT1
= 12V, V
BAT2
= 12V, unless otherwise noted.