LTC2995
PIN FUNCTIONS
resistor between V
PTAT
and the load to ensure stability.
V
PTAT
is pulled low when the supply voltage goes below
the under voltage lockout threshold.
V
REF
:
Voltage Reference Output. V
REF
provides a 1.8V
reference voltage. V
REF
can drive up to ±200μA of load
current and up to 1000pF of capacitive load. For larger
load capacitances insert 1kΩ between V
REF
and the load
to ensure stability. Leave V
REF
open if unused.
VT1:
Temperature Threshold 1. When V
PTAT
crosses the
voltage on VT1 with a polarity set by the PS pin,
TO1
is
pulled low. Tie VT1 to GND if unused.
VT2:
Temperature Threshold 2. When V
PTAT
crosses the
voltage on VT2 with a polarity set by the PS pin,
TO2
is
pulled low. Tie VT2 to V
CC
if unused.
BLOCK DIAGRAM
9
V
CC
16
TMR
V
CC
400k
20
CL1
OSCILLATOR
1
2
3
11
V
REF
1.3MΩ
0.5V
500k
4
5
8
V
PTAT
8
+
VT1
+
–
VT2
+
VL2
1
3 STATE
DECODE
18
DS
+
–
VH2
+
VL1
+
–
+
UVLO
CH2
2V
–
–
CL2
200k
400k
CT2
VH1
CH1
UV PULSE
GENERATOR
UV
15
–
V
CC
V
CC
400k
OV
14
200kΩ
OV PULSE
GENERATOR
+
1.8V
1.2V
–
V
CC
400k
TO2
TO1/TO2
PULSE
GENERATOR
UVLO
V
CC
400k
13
–
CT1
TO1
12
T TO V
CONVERTER
3 STATE
DECODE
7
D
–
6
D
+
19
PS
17
GND
2995 BD
2995f
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
