Datasheet
LTC2923
3
2923fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
ON(FC)
ON Pin Fault Clear Threshold Voltage ● 0.3 0.4 0.5 V
I
ON
ON Pin Input Current V
ON
= 1.2V, V
CC
= 5.5V ● 0 ±100 nA
∆V
DS(TH)
FET Drain-Source Overcurrent Voltage Threshold ● 160 200 240 mV
(V
CC
– V
RAMP
)
I
RAMP
RAMP Pin Input Current 0V < RAMP < V
CC
, V
CC
= 5.5V ● 0 ±1 µA
V
RAMPBUF(OL)
RAMPBUF Low Voltage I
RAMPBUF
= 2mA ● 90 150 mV
V
RAMPBUF(OH)
RAMPBUF High Voltage (V
CC
– V
RAMPBUF
)I
RAMPBUF
= –2mA ● 100 200 mV
V
OS
Ramp Buffer Offset (V
RAMPBUF
– V
RAMP
)V
RAMPBUF
= V
CC
/2, I
RAMPBUF
= 0A –30 0 30 mV
I
ERROR(%)
I
FBx
to I
TRACKx
Current Mismatch I
TRACKx
= –10µA ● 0 ±5%
I
ERROR(%)
= (I
FBx
– I
TRACKx
)/I
TRACKx
I
TRACKx
= –1mA ● 0 ±5%
V
TRACKx
TRACK Pin Voltage I
TRACKx
= –10µA ● 0.776 0.8 0.824 V
I
TRACKx
= –1mA ● 0.776 0.8 0.824 V
I
FB(LEAK)
I
FB
Leakage Current V
FB
= 1.5V, V
CC
= 5.5V ● ±1 ±100 nA
V
FB(CLAMP)
V
FB
Clamp Voltage 1µA < I
FB
< 1mA ● 1.5 1.7 2 V
V
SDO(OL)
SDO Output Low Voltage I
SDO
= 3mA ● 0.2 0.4 V
V
STATUS(OL)
STATUS Output Low Voltage I
STATUS
= 3mA ● 0.2 0.4 V
t
PSC
Short-Circuit Propagation Delay V
DS
High V
DS
= V
CC
, V
CC
= 2.9V 10 20 µs
to GATE Low
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 2.9V < V
CC
< 5.5V unless otherwise noted (Note 3).
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The GATE pin is internally limited to a minimum of 11.5V. Driving
this pin to voltages beyond the clamp may damage the part.
Note 3: All currents into the device pins are positive; all currents out of
device pins are negative. All voltages are referenced to ground unless
otherwise specified.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
GATE
vs V
CC
V
GATE
vs I
GATE
I
GATE
vs V
CC
Fast Pull-Down
V
CC
(V)
2
8
V
GATE
(V)
9
10
12
11
34
2923 G01
56
I
GATE
(µA)
0
0
V
GATE
(V)
5
10
15
510
V
CC
= 2.9V
V
CC
= 5.5V
2923 G02
15
V
CC
(V)
0
0
I
GATE
(mA)
5
10
15
20
30
1
234
2923 G03
56
25
V
GATE
= 5V
Specifications are at T
A
= 25°C unless otherwise noted.