(Notes 2, 13)......................................–40°C to 125°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
8
7
6
5
IN
IN
SHDN
GND
9
MS8E PACKAGE
8-LEAD PLASTIC MSOP
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°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
4
TAB IS
GND
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
4
TAB IS
GND
3
2
1
T PACKAGE
5-LEAD PLASTIC TO-220
SENSE/ADJ*
OUT
GND
IN
SHDN
T
JMAX
= 125°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
= 125°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
LT1965IDD-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
LT1965IDD-3.3#TRPBF
PART MARKING*
LCXW
LCXW
LDKW
LDKW
LDKY
LDKY
LDMB
LDMB
LDMD
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
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
–40°C to 125°C
1965fa
2
LT1965 Series
ORDER INFORMATION
LEAD FREE FINISH
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
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
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
LT1965EMS8E#TRPBF
LT1965IMS8E#TRPBF
PART MARKING*
LTCXX
LTCXX
PACKAGE DESCRIPTION
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 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 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 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
LT1965EMS8E-1.5#TRPBF LTDKX
LT1965IMS8E-1.5#TRPBF LTDKX
LT1965EMS8E-1.8#TRPBF LTDKZ
LT1965IMS8E-1.8#TRPBF LTDKZ
LT1965EMS8E-2.5#TRPBF LTDMC
LT1965IMS8E-2.5#TRPBF LTDMC
LT1965EMS8E-3.3#TRPBF LTDMF
LT1965IMS8E-3.3#TRPBF LTDMF
LT1965EQ#TRPBF
LT1965IQ#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
LT1965ET#TRPBF
LT1965IT#TRPBF
LT1965ET-1.5#TRPBF
LT1965IT-1.5#TRPBF
LT1965ET-1.8#TRPBF
LT1965IT-1.8#TRPBF
LT1965ET-2.5#TRPBF
LT1965IT-2.5#TRPBF
LT1965ET-3.3#TRPBF
LT1965IT-3.3#TRPBF
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-1.5
LT1965T-1.5
LT1965T-1.8
LT1965T-1.8
LT1965T-2.5
LT1965T-2.5
LT1965T-3.3
LT1965T-3.3
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 non-standard 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/
1965fa
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
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)
Line Regulation
V
IN
= 2.1V, I
LOAD
= 1mA
2.3V < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
LT1965-1.5,
ΔV
IN
= 2.1V to 20V, I
LOAD
= 1mA
LT1965-1.8,
ΔV
IN
= 2.3V to 20V, I
LOAD
= 1mA
LT1965-2.5,
ΔV
IN
= 3V to 20V, I
LOAD
= 1mA
LT1965-3.3,
ΔV
IN
= 3.8V to 20V, I
LOAD
= 1mA
LT1965,
ΔV
IN
= 2.1V to 20V, I
LOAD
= 1mA (Note 4)
LT1965-1.5, V
IN
= 2.5V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-1.5, V
IN
= 2.5V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-1.8, V
IN
= 2.8V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-1.8, V
IN
= 2.8V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-2.5, V
IN
= 3.5V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-2.5, V
IN
= 3.5V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-3.3, V
IN
= 4.3V,
ΔI
LOAD
= 1mA to 1.1A
LT1965-3.3, V
IN
= 4.3V,
ΔI
LOAD
= 1mA to 1.1A
LT1965,
LT1965,
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 6, 7, 12)
V
IN
= 2.3V,
ΔI
LOAD
= 1mA to 1.1A (Note 4)
V
IN
= 2.3V,
ΔI
LOAD
= 1mA to 1.1A (Note 4)
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
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
1.5
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
5.25
6.25
8.75
11.5
4.25
0.055
0.12
0.21
0.31
0.5
0.6
2.2
8.2
21
40
1.3
V
OUT
= Off to On
V
OUT
= On to Off
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
57
l
l
MAX
2.3
1.523
1.545
1.827
1.854
2.538
2.575
3.35
3.399
1.218
1.236
9
10
11.5
16
8
10
20
12
24
16.5
33
22
44
8
16
0.08
0.14
0.175
0.28
0.25
0.36
0.36
0.49
1.1
1.5
5.5
20
40
4.5
2
1
10
1
UNITS
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
V
V
V
V
V
V
V
V
mA
mA
mA
mA
mA
μV
RMS
μA
V
V
μA
μA
μA
dB
Load Regulation
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
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
C
OUT
= 10μF I
LOAD
= 1.1A, BW = 10Hz to 100kHz
,
Output Voltage Noise
ADJ Pin Bias Current (Notes 4, 9)
Shutdown Threshold
SHDN
Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection
0.2
0.85
0.45
0.01
5.5
0.01
75
1965fa
4
LT1965 Series
ELECTRICAL CHARACTERISTICS
PARAMETER
Current Limit
Input Reverse Leakage Current
Reverse Output Current (Note 11)
CONDITIONS
V
IN
= 7V, V
OUT
= 0
V
IN
= V
OUT(NOMINAL)
+ 1V,
ΔV
OUT
= -0.1V (Note 6)
V
IN
= –20V, V
OUT
= 0
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
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
1.2
1
525
525
525
525
400
TYP
2.4
MAX
UNITS
A
A
mA
μA
μA
μA
μA
μA
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. Performance at –40°C and 125°C 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.
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 when overtemperature is active.
Continuous operation above the specified maximum operating junction
语音作为自然的人机接口，可以使车载导航系统实现更安全、更人性化的操作。通过国内外车载导航系统的功能对比可知，支持语音交互是车载导航系统的一个发展趋势。另外，市场信息服务公司J.D Power and Associates的调研数据也表明，56％的消费者更倾向于选择声控的导航系统。因此，开发车载语音导航系统是很有意义的。目前，国内已经具备开发车载语音导航系统的技术基础，特别是文语转换TTS技术...[详细]
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