LTC3895
elecTrical characTerisTics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, VRUN = 5V, VEXTVCC = 0V, VDRVSET = 0V,
VPRG = FLOAT unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Gate Driver
TG Pull-up On-Resistance
V
V
V
= INTV
= INTV
2.2
1.0
Ω
Ω
DRVSET
CC
TG Pull-down On-Resistance
BG Pull-up On-Resistance
BG Pull-down On-Resistance
2.0
1.0
Ω
Ω
DRVSET
CC
BOOST to DRV Switch On-Resistance
= 0V, V
= INTV
CC
11
Ω
CC
SW
DRVSET
TG Transition Time:
Rise Time
(Note 6) V
= INTV
DRVSET
= 3300pF
= 3300pF
CC
C
C
25
15
ns
ns
LOAD
LOAD
Fall Time
BG Transition Time:
Rise Time
(Note 6) V
= INTV
DRVSET
CC
C
C
= 3300pF
25
15
ns
ns
LOAD
LOAD
Fall Time
= 3300pF
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
C
C
= 3300pF each driver, V
= INTV
= INTV
LOAD
DRVSET
DRVSET
CC
CC
55
ns
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
= 3300pF each driver, V
LOAD
50
80
ns
ns
t
TG Minimum On-Time
(Note 7) V
= INTV
DRVSET CC
ON(MIN)
Charge Pump for High Side Driver Supply
Charge Pump Output Current
I
V
V
=16V, V = 12V, V
= 0V
= 0V
65
55
µA
µA
CPUMP
BOOST
BOOST
SW
FREQ
FREQ
=19V, V = 12V, V
SW
DRV LDO Regulator
CC
DRV Voltage from NDRV LDO
NDRV Driving External NFET, V
= 0V
CC
EXTVCC
Regulator
7V < V < 150V, DRVSET = 0V
5.8
9.6
6.0
10.0
6.2
10.4
V
V
IN
11V < V < 150V, DRVSET = INTV
IN
CC
DRV Load Regulation from NDRV
NDRV Driving External NFET
CC
CC
LDO Regulator
I
= 0mA to 50mA, V
= 0V
EXTVCC
0
1.0
%
DRV Voltage from Internal V LDO NDRV = DRV , V = 0V
CC EXTVCC
CC
IN
7V < V < 150V, DRVSET = 0V
5.6
9.5
5.85
9.85
6.1
10.3
V
V
IN
11V < V < 150V, DRVSET = INTV
IN
CC
DRV Load Regulation from V LDO
I
= 0mA to 50mA, V
= 0V
CC
IN
CC
EXTVCC
DRVSET = 0V
1.4
0.9
2.5
2.0
%
%
DRVSET = INTV
CC
DRV Voltage from Internal EXTV
7V < V < 13V, DRVSET = 0V
EXTVCC
5.8
9.6
6.0
10.0
6.2
10.4
V
V
CC
CC
LDO
11V < V
< 13V, DRVSET = INTV
EXTVCC
CC
DRV Load Regulation from Internal
I
= 0mA to 50mA
CC
CC
EXTV LDO
DRVSET = 0V, V
= 8.5V
EXTVCC
0.7
0.5
2.0
2.0
%
%
CC
DRVSET = INTV , V
= 13V
CC EXTVCC
EXTV LDO Switchover Voltage
EXTV Ramping Positive
CC
CC
DRVUV = 0V
4.5
7.4
4.7
7.7
4.9
8.0
V
V
DRVUV = INTV , DRVSET = INTV
CC
CC
EXTV Hysteresis
250
5.0
7.0
9.0
mV
CC
Programmable DRV
Programmable DRV
Programmable DRV
R
= 50k
CC
CC
CC
DRVSET
NDRV Driving External NFET, V
= 0V
= 0V
= 0V
V
EXTVCC
EXTVCC
EXTVCC
R
= 70k
DRVSET
NDRV Driving External NFET, V
6.4
7.6
V
R
= 90k
DRVSET
NDRV Driving External NFET, V
V
3895fa
4
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