Datasheet

LTC2997
3
2997fa
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
l
2.5 3.3 5.5 V
UVLO Supply Undervoltage Lockout Threshold V
CC
Falling
l
1.7 1.9 2.1 V
I
CC
Average Supply Current
l
120 170 250 µA
Temperature Monitoring
V
REF
Reference Voltage LTC2997
LTC2997C
LTC2997I
LTC2997H
l
l
l
1.797
1.793
1.790
1.787
1.8
1.8
1.8
1.8
1.803
1.804
1.807
1.808
V
V
V
V
V
REF
Load Regulation Error I
LOAD
= ±200µA; V
CC
= 3.3V
l
±1.5 mV
Remote Sense Current –8 –192 µA
Diode Select Threshold (Note 3)
l
V
CC
– 600 V
CC
– 300 V
CC
– 100 mV
T
UPDATE
Temperature Update Interval 3.5 5 ms
K
T
V
PTAT
Slope
η = 1.004 (Note 4)
4 mV/°K
V
PTAT
Load Regulation I
LOAD
= ±200µA; V
CC
= 3.3V (Note 7) ±1.5 mV
T
INT
Internal Temperature Error LTC2997C, LTC2997I
LTC2997H
l
l
±0.5 ±1.5
±2
°C
°C
T
RMT
Remote Temperature Error, η = 1.004
0°C to 100°C (Notes 5, 7)
–40°C to 0°C (Notes 5, 7)
100°C to 125°C (Notes 5, 7)
±0.25
±0.25
±1
±1.5
±1.5
°C
°C
°C
T
VCC
Temperature Error vs Supply 2.5V ≤ V
CC
≤ 5.5V
l
±0.1 ±1 °C/V
T
RS
Series Resistance Cancellation Error R
SERIES
= 100Ω
l
±0.25 ±1 °C
Temperature Noise (Note 6) 0.25
0.015
°C RMS
°C/√Hz
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 3.3V, unless otherwise noted.
Note 3: If voltage on pin D
+
exceeds the diode select threshold the
LTC2997 uses the internal diode sensor.
Note 4: η = ideality factor of remote diode
Note 5: Remote diode temperature.
Note 6: Guaranteed by design and not subject to test.
Note 7: Guaranteed by design and test correlation.