EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LTC2912‑2
TOP VIEW
LTC2912‑2
TOP VIEW
DIS 1
UV
2
OV
3
GND 4
8 V
CC
7 VH
6 VL
5 TMR
V
CC
1
VH 2
VL 3
TMR 4
9
8 DIS
7
UV
6
OV
5 GND
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 55°C/W
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 55°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
LTC2912‑3
TOP VIEW
LTC2912‑3
TOP VIEW
LATCH
1
UV
2
OV 3
GND 4
8 V
CC
7 VH
6 VL
5 TMR
V
CC
1
VH 2
VL 3
TMR 4
9
8
LATCH
7
UV
6 OV
5 GND
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C,
θ
JA
= 55°C/W
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 55°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
2912fb
2
For more information
www.linear.com/LTC2912
LTC2912
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
LTC2912ITS8‑1#TRMPBF
TAPE AND REEL
LTC2912ITS8‑1#TRPBF
PART MARKING*
LTCJW
LTCJW
LTCJW
LCJZ
LCJZ
LCJZ
LTCJX
LTCJX
LTCJX
LCKB
LCKB
LCKB
LTCJY
LTCJY
LTCJY
LCKC
LCKC
LCKC
PACKAGE DESCRIPTION
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead Plastic TSOT‑23
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
8‑Lead (3mm
×
2mm) Plastic DFN
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
LTC2912CTS8‑1#TRMPBF LTC2912CTS8‑1#TRPBF
LTC2912HTS8‑1#TRMPBF LTC2912HTS8‑1#TRPBF
LTC2912CDDB‑1#TRMPBF LTC2912CDDB‑1#TRPBF
LTC2912IDDB‑1#TRMPBF LTC2912IDDB‑1#TRPBF
LTC2912HDDB‑1#TRMPBF LTC2912HDDB‑1#TRPBF
LTC2912CTS8‑2#TRMPBF LTC2912CTS8‑2#TRPBF
LTC2912ITS8‑2#TRMPBF
LTC2912ITS8‑2#TRPBF
LTC2912HTS8‑2#TRMPBF LTC2912HTS8‑2#TRPBF
LTC2912CDDB‑2#TRMPBF LTC2912CDDB‑2#TRPBF
LTC2912IDDB‑2#TRMPBF LTC2912IDDB‑2#TRPBF
LTC2912HDDB‑2#TRMPBF LTC2912HDDB‑2#TRPBF
LTC2912CTS8‑3#TRMPBF LTC2912CTS8‑3#TRPBF
LTC2912ITS8‑3#TRMPBF
LTC2912ITS8‑3#TRPBF
LTC2912HTS8‑3#TRMPBF LTC2912HTS8‑3#TRPBF
LTC2912CDDB‑3#TRMPBF LTC2912CDDB‑3#TRPBF
LTC2912IDDB‑3#TRMPBF LTC2912IDDB‑3#TRPBF
LTC2912HDDB‑3#TRMPBF LTC2912HDDB‑3#TRPBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2912fb
For more information
www.linear.com/LTC2912
3
LTC2912
ELECTRICAL CHARACTERISTICS
SYMBOL
V
SHUNT
DV
SHUNT
V
CC
V
CCR(MIN)
V
CC(UVLO)
DV
CC(UVHYST)
I
CC
V
UOT
t
UOD
I
VHL
t
UOTO
V
LATCH(VIH)
V
LATCH(VIL)
I
LATCH
I
DIS
V
DIS(VIH)
V
DIS(VIL)
I
TMR(UP)
I
TMR(DOWN)
V
TMR(DIS)
V
OH
V
OL
PARAMETER
V
CC
Shunt Regulator Voltage
V
CC
Shunt Regulator Load Regulation
Supply Voltage (Note 3)
Minimum V
CC
Output Valid
Supply Undervoltage Lockout
Supply Undervoltage Lockout Hysteresis
Supply Current
Undervoltage/Overvoltage Threshold
Undervoltage/Overvoltage Threshold to
Output Delay
VH, VL Input Current
UV/OV Time‑Out Period
OV Latch Clear Input High
OV Latch Clear Input Low
LATCH
Input Current
DIS Input Current
DIS Input High
DIS Input Low
TMR Pull‑Up Current
TMR Pull‑Down Current
Timer Disable Voltage
Output Voltage High
UV/OV/OV
Output Voltage Low
UV/OV/OV
V
TMR
= 0V
V
TMR
= 0V (H‑Grade)
V
TMR
= 1.6V
V
TMR
= 1.6V (H‑Grade)
Referenced to V
CC
V
CC
= 2.3V, I
UV/OV
= –1µA
V
CC
= 2.3V, I
UV/OV
= 2.5mA
V
CC
= 1V, I
UV
= 100µA
V
LATCH
> 0.5V
V
DIS
> 0.5V
V
Hn
= V
UOT
– 5mV or V
Ln
= V
UOT
+ 5mV
H‑Grade
C
TMR
= 1nF
C
TMR
= 1nF (H‑Grade)
DIS = 0V
DIS = 0V, V
CC
Rising
DIS = 0V
V
CC
= 2.3V to 6V
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, VL = 0.45V, VH = 0.55V,
LATCH
= V
CC
unless otherwise
noted. (Note 2)
CONDITIONS
I
CC
= 5mA
I
CC
= 5mA (H‑Grade)
I
CC
= 2mA to 10mA
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
6.2
6.2
2.3
1.9
5
492
50
TYP
6.6
6.6
200
MAX
7.2
7.3
300
V
SHUNT
1
UNITS
V
V
mV
V
V
V
mV
µA
mV
µs
nA
nA
ms
ms
V
V
µA
µA
V
V
µA
µA
µA
µA
mV
V
2
25
29
500
125
2.1
50
70
508
500
±15
±30
6
6
1.2
8.5
8.5
12.5
14
0.8
±1
1
1.2
2
3.3
0.8
–1.3
–1.2
1.3
1.2
–180
1
–2.1
–2.1
2.1
2.1
–270
0.10
0.01
–2.8
–2.8
2.8
2.8
0.30
0.15
V
V
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.
Note 3:
V
CC
maximum pin voltage is limited by input current. Since the
V
CC
pin has an internal 6.5V shunt regulator, a low impedance supply that
exceeds 6V may exceed the rated terminal current. Operation from higher
voltage supplies requires a series dropping resistor. See Applications
分立器件
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