LTC2965
5
2965fb
For more information www.linear.com/LTC2965
Typical perForMance characTerisTics
Voltage Output High vs Pull-Down
Current (OUT)
Voltage Output Low vs Pull-Up
Current (OUT)
Voltage Output High
vs Input Voltage
PULL-DOWN CURRENT (µA)
0
V
OH
(V)
2
3
–12
2965 G09
1
0
–3
–6
–9
4
V
IN
= 12V
–45°C
25°C
90°C
125°C
PULL-UP CURRENT (mA)
0
0
V
OL
(V)
0.25
0.50
0.75
1.00
1.25
1.50
1 2 3 4
5
–45°C
25°C
90°C
125°C
V
IN
(V)
3
1.7
V
OH
(V)
2.0
2.3
2.6
2.9
3.2
3.5
4 5 6 7
8
I = –1µA
pin FuncTions
Exposed Pad (DD8 Only): Exposed pad may be left floating
or connected to device ground.
GND: Device Ground.
INH: High Comparator Reference Input. Voltage on this
pin is multiplied by the configured range setting to set
the V
IN
high or rising threshold. Keep within valid voltage
range, V
CM
, or tie to GND to configure built-in hysteresis
where high threshold for V
IN
becomes INL + V
HYS
scaled
according to the RS pin configuration.
INL: Low Comparator Reference Input. Voltage on this pin
is multiplied by the configured range setting to set the V
IN
low or falling threshold. Keep within valid voltage range,
V
CM
, or tie to GND to configure built-in hysteresis where
low threshold becomes INH – V
HYS
scaled according to
the RS pin configuration. Otherwise, INH-INL sets the
hysteresis of the comparator. Oscillation will occur if INL
> INH unless built-in hysteresis is enabled.
OUT: Comparator Output. OUT consists of a high voltage
active pull-down and a gated, resistive (500kΩ) pull-up
to an internally generated supply between 3.5V and 5V
depending on input supply voltage. Blocking circuitry at
the pin allows the pin to be resistively pulled up to volt
-
ages as high as 100V without back conducting onto the
internal supply of the part
.
Polarity with respect to the V
IN
pin is configured using the polarity select pin, PS. OUT
pulls low when the part is in UVLO.
PS: Polarity Selection. Connect to REF or a voltage >V
TH
to configure comparator output to be inverting with re-
spect to V
IN
. Otherwise connect pin to GND to configure
comparator output to be noninverting with respect to V
IN
.
REF: Reference Output. V
REF
with respect to GND. Use a
maximum of 1nF to bypass unless damping resistor is used.
RS: Range Select Input. RS selects 10x or 40x range.
Connect to REF or GND to configure pin. (See Table 1)
V
IN
: Voltage Monitor and Supply Input. An internal high
value resistive divider is connected to the pin. If V
IN
falls
below the UVLO threshold minus hysteresis, the output
is pulled low. If V
IN
< 1.2V, the logic state of the outputs
cannot be guaranteed.
