Operating Junction Temperature Range (Notes 3, 5, 13)
E-, I-Grades ....................................... –40°C to 125°C
H-Grade ............................................. –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
(Only for MSOP, TO-220, DD-Pak Packages) .... 300°C
pin conFiguration
TOP VIEW
OUT 1
OUT 2
SENSE/ADJ* 3
GND 4
9
8
7
6
5
IN
IN
SHDN
GND
TOP VIEW
OUT
OUT
SENSE/ADJ*
GND
1
2
3
4
9
8
7
6
5
IN
IN
SHDN
GND
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
MS8E PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 65°C/W,
θ
JC
= 3°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
*PIN 3 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3
*PIN 3 = ADJ FOR LT1965
FRONT VIEW
5
TAB IS
GND
4
3
2
1
Q PACKAGE
5-LEAD PLASTIC DD-PAK
SENSE/ADJ*
OUT
GND
IN
SHDN
T
JMAX
= 125°C,
θ
JA
= 60°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
*PIN 3 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3
*PIN 3 = ADJ FOR LT1965
FRONT VIEW
5
TAB IS
GND
4
3
2
1
T PACKAGE
5-LEAD PLASTIC TO-220
SENSE/ADJ*
OUT
GND
IN
SHDN
T
JMAX
= 150°C,
θ
JA
= 30°C/W,
θ
JC
= 3°C/W
*PIN 5 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3
*PIN 5 = ADJ FOR LT1965
T
JMAX
= 150°C,
θ
JA
= 50°C/W,
θ
JC
= 3°C/W
*PIN 5 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3
*PIN 5 = ADJ FOR LT1965
orDer inForMation
LEAD FREE FINISH
LT1965EDD#PBF
LT1965IDD#PBF
LT1965EDD-1.5#PBF
LT1965IDD-1.5#PBF
LT1965EDD-1.8#PBF
LT1965IDD-1.8#PBF
LT1965EDD-2.5#PBF
LT1965IDD-2.5#PBF
LT1965EDD-3.3#PBF
TAPE AND REEL
LT1965EDD#TRPBF
LT1965IDD#TRPBF
LT1965EDD-1.5#TRPBF
LT1965IDD-1.5#TRPBF
LT1965EDD-1.8#TRPBF
LT1965IDD-1.8#TRPBF
LT1965EDD-2.5#TRPBF
LT1965IDD-2.5#TRPBF
LT1965EDD-3.3#TRPBF
PART MARKING*
LCXW
LCXW
LDKW
LDKW
LDKY
LDKY
LDMB
LDMB
LDMD
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
1965fb
2
For more information
www.linear.com/LT1965
LT1965 Series
orDer inForMation
LEAD FREE FINISH
LT1965IDD-3.3#PBF
LT1965EMS8E#PBF
LT1965IMS8E#PBF
LT1965EMS8E-1.5#PBF
LT1965IMS8E-1.5#PBF
LT1965EMS8E-1.8#PBF
LT1965IMS8E-1.8#PBF
LT1965EMS8E-2.5#PBF
LT1965IMS8E-2.5#PBF
LT1965EMS8E-3.3#PBF
LT1965IMS8E-3.3#PBF
LT1965EQ#PBF
LT1965IQ#PBF
LT1965HQ#PBF
LT1965EQ-1.5#PBF
LT1965IQ-1.5#PBF
LT1965EQ-1.8#PBF
LT1965IQ-1.8#PBF
LT1965EQ-2.5#PBF
LT1965IQ-2.5#PBF
LT1965EQ-3.3#PBF
LT1965IQ-3.3#PBF
LT1965ET#PBF
LT1965IT#PBF
LT1965HT#PBF
LT1965ET-1.5#PBF
LT1965IT-1.5#PBF
LT1965ET-1.8#PBF
LT1965IT-1.8#PBF
LT1965ET-2.5#PBF
LT1965IT-2.5#PBF
LT1965ET-3.3#PBF
LT1965IT-3.3#PBF
TAPE AND REEL
LT1965IDD-3.3#TRPBF
LT1965EMS8E#TRPBF
LT1965IMS8E#TRPBF
LT1965EMS8E-1.5#TRPBF
LT1965IMS8E-1.5#TRPBF
LT1965EMS8E-1.8#TRPBF
LT1965IMS8E-1.8#TRPBF
LT1965EMS8E-2.5#TRPBF
LT1965IMS8E-2.5#TRPBF
LT1965EMS8E-3.3#TRPBF
LT1965IMS8E-3.3#TRPBF
LT1965EQ#TRPBF
LT1965IQ#TRPBF
LT1965HQ#TRPBF
LT1965EQ-1.5#TRPBF
LT1965IQ-1.5#TRPBF
LT1965EQ-1.8#TRPBF
LT1965IQ-1.8#TRPBF
LT1965EQ-2.5#TRPBF
LT1965IQ-2.5#TRPBF
LT1965EQ-3.3#TRPBF
LT1965IQ-3.3#TRPBF
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
PART MARKING*
LDMD
LTCXX
LTCXX
LTDKX
LTDKX
LTDKZ
LTDKZ
LTDMC
LTDMC
LTDMF
LTDMF
LT1965Q
LT1965Q
LT1965Q
LT1965Q-1.5
LT1965Q-1.5
LT1965Q-1.8
LT1965Q-1.8
LT1965Q-2.5
LT1965Q-2.5
LT1965Q-3.3
LT1965Q-3.3
LT1965T
LT1965T
LT1965T
LT1965T-1.5
LT1965T-1.5
LT1965T-1.8
LT1965T-1.8
LT1965T-2.5
LT1965T-2.5
LT1965T-3.3
LT1965T-3.3
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic DD-Pak
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
5-Lead Plastic TO-220
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are 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/
1965fb
For more information
www.linear.com/LT1965
3
LT1965 Series
electrical characteristics
PARAMETER
Minimum Input Voltage
(Notes 4, 12)
Regulated Output Voltage
(Note 5)
CONDITIONS
I
LOAD
= 0.5A
I
LOAD
= 1.1A (T
J
< 125°C)
I
LOAD
= 1A (H-Grade, T
J
> 125°C)
LT1965-1.5, V
IN
= 2.1V, I
LOAD
= 1mA
LT1965-1.5, 2.5 < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
LT1965-1.8, V
IN
= 2.3V, I
LOAD
= 1mA
LT1965-1.8, 2.8 < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
LT1965-2.5, V
IN
= 3V, I
LOAD
= 1mA
LT1965-2.5, 3.5 < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
LT1965-3.3, V
IN
= 3.8V, I
LOAD
= 1mA
LT1965-3.3, 4.3 < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
ADJ Pin Voltage (Notes 4, 5)
V
IN
= 2.1V, I
LOAD
= 1mA
2.3V < V
IN
< 20V, 1mA < I
LOAD
< 1.1A (T
J
< 125°C)
2.3V < V
IN
< 20V, 1mA < I
LOAD
< 1A (H-Grade, T
J
> 125°C)
LT1965-1.5, ∆V
IN
= 2.1V to 20V, I
LOAD
= 1mA
LT1965-1.8, ∆V
IN
= 2.3V to 20V, I
LOAD
= 1mA
LT1965-2.5, ∆V
IN
= 3V to 20V, I
LOAD
= 1mA
LT1965-3.3, ∆V
IN
= 3.8V to 20V, I
LOAD
= 1mA
LT1965, ∆V
IN
= 2.1V to 20V, I
LOAD
= 1mA (E-, I-Grades) (Note 4)
LT1965, ∆V
IN
= 2.1V to 20V, I
LOAD
= 1mA (H-Grade) (Note 4)
LT1965-1.5, V
IN
= 2.5V, ∆I
LOAD
= 1mA to 1.1A
LT1965-1.5, V
IN
= 2.5V, ∆I
LOAD
= 1mA to 1.1A
LT1965-1.8, V
IN
= 2.8V, ∆I
LOAD
= 1mA to 1.1A
LT1965-1.8, V
IN
= 2.8V, ∆I
LOAD
= 1mA to 1.1A
LT1965-2.5, V
IN
= 3.5V, ∆I
LOAD
= 1mA to 1.1A
LT1965-2.5, V
IN
= 3.5V, ∆I
LOAD
= 1mA to 1.1A
LT1965-3.3, V
IN
= 4.3V, ∆I
LOAD
= 1mA to 1.1A
LT1965-3.3, V
IN
= 4.3V, ∆I
LOAD
= 1mA to 1.1A
LT1965, V
IN
= 2.3V, ∆I
LOAD
= 1mA to 1.1A (Note 4)
LT1965, V
IN
= 2.3V, ∆I
LOAD
= 1mA to 1.1A (T
J
< 125°C)
LT1965, V
IN
= 2.3V, ∆I
LOAD
= 1mA to 1A (H-Grade, T
J
> 125°C)
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 6, 7, 12)
I
LOAD
= 1mA
I
LOAD
= 1mA
I
LOAD
= 100mA
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 500mA
I
LOAD
= 1.1A
I
LOAD
= 1.1A (T
J
< 125°C)
I
LOAD
= 1A (H-Grade, T
J
> 125°C)
GND Pin Current
V
IN
= V
OUT(NOMINAL)
+ 1V
(Notes 6, 8)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 1.1A (T
J
< 125°C)
I
LOAD
= 1A (H-Grade, T
J
> 125°C)
C
OUT
= 10µF, I
LOAD
= 1.1A, BW = 10Hz to 100kHz
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
MIN
TYP
1.65
1.8
1.477
1.455
1.773
1.746
2.462
2.425
3.25
3.201
1.182
1.164
1.158
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
1.2
1.2
3.5
4
4.5
5.5
3
3
5.25
l
MAX
2.3
2.3
1.523
1.545
1.827
1.854
2.538
2.575
3.35
3.399
1.218
1.236
1.236
9
10
11.5
16
8
12
10
20
12
24
16.5
33
22
44
8
16
22
0.08
0.14
0.175
0.28
0.25
0.36
0.36
0.49
0.49
1.1
1.5
5.5
20
40
40
4.5
2
UNITS
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
V
V
V
V
V
V
V
V
mA
mA
mA
mA
mA
mA
µV
RMS
µA
V
V
1965fb
l
l
l
l
l
l
l
l
l
l
l
Line Regulation
Load Regulation
6.25
l
8.75
l
11.5
l
4.25
l
0.055
l
0.12
l
0.21
l
0.31
l
l
l
l
l
l
0.5
0.6
2.2
8.2
21
40
1.3
Output Voltage Noise
ADJ Pin Bias Current
(Notes 4, 9)
Shutdown Threshold
V
OUT
= Off to On
V
OUT
= On to Off
l
l
0.2
0.85
0.45
4
For more information
www.linear.com/LT1965
LT1965 Series
electrical characteristics
PARAMETER
SHDN
Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection
Current Limit
CONDITIONS
V
SHDN
= 0V
V
SHDN
= 20V
V
IN
= 6V, V
SHDN
= 0V
V
IN
– V
OUT
= 1.5V (AVG), V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 0.75A
V
IN
= 7V, V
OUT
= 0
V
IN
= V
OUT(NOMINAL)
+ 1V, ∆V
OUT
= –0.1V (T
J
< 125°C) (Note 6)
V
IN
= V
OUT(NOMINAL)
+ 1V, ∆V
OUT
= –0.1V, (H-Grade, T
J
> 125°C) (Note 6)
V
IN
= –20V, V
OUT
= 0
275
275
275
275
175
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
MIN
TYP
0.01
5.5
0.01
57
75
2.4
MAX
1
10
1
UNITS
µA
µA
µA
dB
A
A
A
1
525
525
525
525
400
mA
µA
µA
µA
µA
µA
1.2
1.1
Input Reverse-Leakage Current
Reverse-Output Current (Note 11) LT1965-1.5, V
OUT
= 1.5V, V
IN
= 0
LT1965-1.8, V
OUT
= 1.8V, V
IN
= 0
LT1965-2.5, V
OUT
= 2.5V, V
IN
= 0
LT1965-3.3, V
OUT
= 3.3V, V
IN
= 0
LT1965 (Note 4), V
OUT
= 1.2V, V
IN
= 0
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:
Absolute maximum input to output differential voltage is not
achievable with all combinations of rated IN pin and OUT pin voltages.
With the IN pin at 22V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT must not exceed ±22V.
Note 3:
The LT1965 regulators are tested and specified under pulse
load conditions such that T
J
@
T
A
. The LT1965E regulators are 100%
tested at T
A
= 25°C and performance is guaranteed from 0°C to 125°C.
Performance of the LT1965E over the full –40°C to 125°C operating
junction temperature range is assured by design, characterization and
correlation with statistical process controls. The LT1965I regulators are
guaranteed over the full –40°C to 125°C operating junction temperature
range. The LT1965H is tested at 150°C operating junction temperature.
High junction temperatures degrade operating lifetimes. Operating lifetime
is derated at junction temperatures greater than 125°C.
Note 4:
The LT1965 adjustable version is tested and specified for these
conditions with the ADJ connected to the OUT pin.
Note 5:
Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at the maximum input voltage. Limit the input-to-output
voltage differential if operating at the maximum output current.
Note 6:
To satisfy minimum input voltage requirements, the LT1965
adjustable version is tested and specified for these conditions with an
external resistor divider (bottom 4.02k, top 4.32k) for an output voltage of
2.5V. The external resistor divider adds 300µA of output DC load current.
This external current is not factored into GND pin current.
Note 7:
Dropout voltage is the minimum input-to-output voltage
differential needed to maintain regulation at a specified output current. In
dropout, the output voltage equals: (V
IN
– V
DROPOUT
)
Note 8:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 1V and a
current source load. GND pin current increases slightly in dropout. For
the fixed output versions, an internal resistor divider will typically add
100µA to the GND pin current. See GND pin current curves in the Typical
Performance Characteristics section.
Note 9:
ADJ pin bias current flows into the ADJ pin.
Note 10:
SHDN
pin current flows into the
SHDN
pin.
Note 11:
Reverse-output current is tested with the IN pin grounded and
the OUT pin forced to the rated output voltage. This current flows into the
OUT pin and out of the GND pin.
Note 12:
For the LT1965, LT1965-1.5 and LT1965-1.8, the minimum input
voltage specification limits the dropout voltage under some output voltage/
load conditions.
Note 13:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C (LT1965E, LT1965I) or 150°C (LT1965H)
when overtemperature is active. Continuous operation above the specified
maximum operating junction temperature may impair device reliability.
目前医疗监护中无法动态掌握患者信息，一旦患者病情恶化，无法在第一时间实施抢救，对数据信息维护效率低。 文中首先阐述了蓝牙技术及其在医疗监护中应用的可行性，然后设计了系统框架，给出了具体功能，BlueTooth Wireless Communication Technology Application in Medical Monitoring包括数据采集和语音报警，最后对蓝牙信号在传输...[详细]
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