LTC2902
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
18
UNITS
mV
V
V
–ADJ Reset Threshold
Minimum Internal Operating Voltage
V4 Input Threshold
●
●
–18
0
RTAN
CC
RST, COMPX in Correct Logic State;
1
V
V
V
V
V
Rising Prior to Program
CC
CC
CC
CC
V
V
V
Minimum Required for Programming
Minimum Required for Comparators
Reference Voltage
Rising
Falling
●
●
2.42
2.32
V
V
CCMINP
CCMINC
REF
≥ 2.3V, I
= ±1mA, C ≤ 1000pF
REF
VREF
T0 Low, T1 Low
T0 Low, T1 High
T0 High, T1 Low
●
●
●
●
1.192
1.160
1.128
1.096
1.210
1.178
1.146
1.113
1.228
1.195
1.163
1.130
V
V
V
V
T0 High, T1 High
V
Programming Voltage Range
V
V
≥ V
●
●
●
●
●
0
V
REF
V
nA
µA
µA
PG
VPG
V1
CC
PG
CCMINP
REF
I
I
I
I
V
Input Current
= V
±20
75
2
PG
V1 Input Current
V2 Input Current
V3 Input Current
V1 = 5V, I
V2 = 3.3V
V3 = 2.5V
= 12µA, (Note 4)
43
0.8
VREF
V2
0.52
1.2
15
µA
nA
V3
V3 = 0.55V (ADJ Mode)
–15
I
V4 Input Current
V4 = 1.8V
V4 = 0.55V (ADJ Mode)
V4 = –0.05V (–ADJ Mode)
●
●
●
0.34
0.8
15
15
µA
nA
nA
V4
–15
–15
I
I
t
t
CRT Pull-Up Current
CRT Pull-Down Current
Reset Time-Out Period
V
V
C
= 0V
●
●
●
–1.4
10
–2
20
7
–2.6
30
µA
µA
ms
µs
CRT(UP)
CRT(DN)
RST
CRT
CRT
= 1.3V
= 1500pF
5
9
RT
V Undervoltage Detect to RST or COMPX
X
V Less Than Reset Threshold V
by More Than 1%
150
UV
X
RTX
V
Output Voltage Low RST, COMPX
I
= 2.5mA; V1 = 3V, V2 = 3V;
SINK
●
0.15
0.4
V
OL
V3, V4 = 0V; V = 0V
PG
I
I
= 100µA; V2 = 1V; V1, V3, V4 = 0V
= 100µA; V1 = 1V; V2, V3, V4 = 0V
●
●
0.05
0.05
0.3
0.3
V
V
SINK
SINK
V
V
Output Voltage High RST, COMPX (Note 5)
I
I
= 1µA
●
●
V2 – 1
V
V
OH
OH
SOURCE
SOURCE
Output Voltage High RST (LTC2902-2)
(Note 6)
= 200µA
0.8 • V2
Digital Inputs T0, T1, RDIS
V
V
T0, T1 Low Level Input Voltage
T0, T1 High Level Input Voltage
T0, T1 Input Current
V
V
= 3.3V to 5.5V
= 3.3V to 5.5V
●
●
●
●
●
0.3V
CC
V
V
IL
CC
CC
0.7V
IH
CC
I
T0 = 0V, T1 = V
±0.1
±1
µA
V
INTOL
CC
V
V
RDIS Input Threshold Low
RDIS Input Threshold High
RDIS Pull-Up Current
V
V
V
= 3.3V to 5.5V
0.4
IL
CC
= 3.3V to 5.5V
1.6
V
IH
CC
I
= 0V
–10
µA
RDIS
RDIS
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 5: The output pins RST and COMPX have internal pull-ups to V2 of
typically 6µA. However, external pull-up resistors may be used when faster
rise times are required or for V voltages greater than V2.
OH
Note 2: All voltage values are with respect to GND.
Note 6: The push-pull RST output pin on the LTC2902-2 is actively pulled up
to V2.
Note 3: The greater of V1, V2 is the internal supply voltage (V ).
CC
Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent
current. If at any time V2 is larger than V1, V2 must be capable of supplying
the quiescent current, programming (transient) current and reference load
current.
2902f
3
Linear Systems [ Linear Systems ]
