LTC2939H 데이터 시트보기 (PDF) - Linear Technology
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LTC2939H Datasheet PDF : 20 Pages
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LTC2938/LTC2939
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VCC = 5V unless otherwise specified. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC
VCCMINP
VRT50
VRT33
VRT25
VRT18
VRT15
VRT12
VRTA
VRTAN
VREF
VPG
IVPG
IV1
IV2
IV3
Minimum Internal Operating Voltage
Minimum Required for Configuration
5V, 5% Reset Threshold
3.3V, 5% Reset Threshold
2.5V, 5% Reset Threshold
1.8V, 5% Reset Threshold
1.5V, 5% Reset Threshold
1.2V, 5% Reset Threshold
ADJ Reset Threshold
–ADJ Reset Threshold
Reference Voltage
Configuration Voltage Range
VPG Input Current
V1 Input Current
V2 Input Current
V3 Input Current
RST in Correct Logic State
VCC Rising
V1 Input Threshold
V1, V2 Input Threshold
V2, V3 Input Threshold
V2, V3, V4 Input Threshold
V2, V3, V4 Input Threshold
V2, V3, V4 Input Threshold
V3, V4, V5, V6 Input Threshold
V4 Input Threshold
VCC > 2.3V, IVREF = ±1mA,
CREF < 1000pF
VCC > VCCMINP
VPG = VREF
V1 = 5V, IVREF = 12μA, (Note 4)
V2 = 3.3V
V3 = 2.5V
V3 = 0.55V (ADJ Mode)
l
1
V
l
2.6
V
l 4.600 4.675 4.750
V
l 3.036 3.086 3.135
V
l 2.300 2.338 2.375
V
l 1.656 1.683 1.710
V
l 1.380 1.403 1.425
V
l 1.104 1.122 1.140
V
l 492.5 500 507.5
mV
l –18
0
18
mV
l 1.192 1.210 1.228
V
l
0
l
VREF
V
±20
nA
l
80
125
μA
l
0.8
2
μA
l
0.52
1.2
μA
l
±15
nA
IV4
V4 Input Current
V4 = 1.8V
V4 = 0.55V (ADJ Mode)
V4 = -0.02V (–ADJ Mode)
l
0.34
0.8
μA
l
±15
nA
l
±15
nA
IV5, IV6
ICRT(UP)
ICRT(DN)
tRST
tUV
VOL
VOL
VOH
V5, V6 Input Current (LTC2939)
CRT Pull-Up Current
CRT Pull-Down Current
Reset Timeout Period
Vn Undervoltage Detect to RST
Voltage Output Low RST
Voltage Output Low WDO
Voltage Output High RST, WDO
(Note 5)
V5, V6 = 0.55V
l
±15
nA
VCRT = GND
l –1.4
–2
–2.6
μA
VCRT = 1.3V
l 10
20
30
μA
CRT = 1500pF
l
2
3
4
ms
Vn Less Than Reset Threshold VRTX by
More Than 1%
150
μs
ISINK = 2.5mA; VCC = 3V
ISINK = 100μA; VCC = 1V
ISINK = 2.5mA; VCC = 3.3V
ISOURCE = –1μA; V2 = 3.3V
l
0.15
0.4
V
l
0.05
0.3
V
l
0.15
0.4
V
l V2 – 1
V
ICWT(UP)
ICWT(DN)
tWD
VWDI
CWT Pull-Up Current
CWT Pull-Down Current
Watchdog Timeout Period
WDI Input Threshold
(VCC = 3.3V to 5.5V)
VCWT = GND
VCWT = 1.3V
CWT = 1500pF
Logic Low
Open
Logic High
l –1.4
–2
–2.6
μA
l 10
20
30
μA
l 20
30
40
ms
l
0.4
V
l 0.7
0.9
1.1
V
l 1.4
V
293839ff
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