(E, I Grades) ......................................–40°C to 125°C
Storage Temperature Range...................–65°C to 150°C
Lead Temperature: Soldering, 10 sec
SC8 Package Only ............................................. 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
ADJ/NC* 1
OUT 2
OUT 3
7
6 GND
5
SHDN
4 IN
SHDN
GND
GND
GND
1
2
3
4
8
7
6
5
NC
ADJ/NC*
OUT
IN
DC PACKAGE
6-LEAD (2mm 2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 65°C/W TO 85°C/W**
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
SC8 PACKAGE
8-LEAD PLASTIC SC70
T
JMAX
= 125°C,
θ
JA
= 75°C/W TO 95°C/W**
* The ADJ pin is not connected in fixed output voltage versions.
** See the Applications Information section.
ORDER INFORMATION
LEAD FREE FINISH
LT3009EDC#PBF
LT3009IDC#PBF
LT3009EDC-1.2#PBF
LT3009IDC-1.2#PBF
LT3009EDC-1.5#PBF
LT3009IDC-1.5#PBF
LT3009EDC-1.8#PBF
LT3009IDC-1.8#PBF
LT3009EDC-2.5#PBF
LT3009IDC-2.5#PBF
LT3009EDC-3.3#PBF
LT3009IDC-3.3#PBF
LT3009EDC-5#PBF
LT3009IDC-5#PBF
TAPE AND REEL
LT3009EDC#TRPBF
LT3009IDC#TRPBF
LT3009EDC-1.2#TRPBF
LT3009IDC-1.2#TRPBF
LT3009EDC-1.5#TRPBF
LT3009IDC-1.5#TRPBF
LT3009EDC-1.8#TRPBF
LT3009IDC-1.8#TRPBF
LT3009EDC-2.5#TRPBF
LT3009IDC-2.5#TRPBF
LT3009EDC-3.3#TRPBF
LT3009IDC-3.3#TRPBF
LT3009EDC-5#TRPBF
LT3009IDC-5#TRPBF
PART MARKING*
LCQX
LCQX
LDTW
LDTW
LDVB
LDVB
LDKC
LDKC
LDTY
LDTY
LDKD
LDKD
LDKF
LDKF
PACKAGE DESCRIPTION
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) 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
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
3009fd
2
LT3009 Series
ORDER INFORMATION
LEAD FREE FINISH
LT3009ESC8#PBF
LT3009ESC8-1.2#PBF
LT3009ESC8-1.5#PBF
LT3009ESC8-1.8#PBF
LT3009ESC8-2.5#PBF
LT3009ESC8-3.3#PBF
LT3009ESC8-5#PBF
LEAD BASED FINISH
LT3009EDC
LT3009IDC
LT3009EDC-1.2
LT3009IDC-1.2
LT3009EDC-1.5
LT3009IDC-1.5
LT3009EDC-1.8
LT3009IDC-1.8
LT3009EDC-2.5
LT3009IDC-2.5
LT3009EDC-3.3
LT3009IDC-3.3
LT3009EDC-5
LT3009IDC-5
LT3009ESC8
LT3009ESC8-1.2
LT3009ESC8-1.5
LT3009ESC8-1.8
LT3009ESC8-2.5
LT3009ESC8-3.3
LT3009ESC8-5
TAPE AND REEL
LT3009ESC8#TRPBF
LT3009ESC8-1.2#TRPBF
LT3009ESC8-1.5#TRPBF
LT3009ESC8-1.8#TRPBF
LT3009ESC8-2.5#TRPBF
LT3009ESC8-3.3#TRPBF
LT3009ESC8-5#TRPBF
TAPE AND REEL
LT3009EDC#TR
LT3009IDC#TR
LT3009EDC-1.2#TR
LT3009IDC-1.2#TR
LT3009EDC-1.5#TR
LT3009IDC-1.5#TR
LT3009EDC-1.8#TR
LT3009IDC-1.8#TR
LT3009EDC-2.5#TR
LT3009IDC-2.5#TR
LT3009EDC-3.3#TR
LT3009IDC-3.3#TR
LT3009EDC-5#TR
LT3009IDC-5#TR
LT3009ESC8#TR
LT3009ESC8-1.2#TR
LT3009ESC8-1.5#TR
LT3009ESC8-1.8#TR
LT3009ESC8-2.5#TR
LT3009ESC8-3.3#TR
LT3009ESC8-5#TR
PART MARKING*
LCQY
LDTX
LDVC
LDKG
LDTZ
LDKH
LDKJ
PART MARKING*
LCQX
LCQX
LDTW
LDTW
LDVB
LDVB
LDKC
LDKC
LDTY
LDTY
LDKD
LDKD
LDKF
LDKF
LCQY
LDTX
LDVC
LDKG
LDTZ
LDKH
LDKJ
PACKAGE DESCRIPTION
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
PACKAGE DESCRIPTION
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
6-Lead (2mm
×
2mm) Plastic DFN
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
8-Lead Plastic SC70
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
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
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
3009fd
3
LT3009 Series
ELECTRICAL CHARACTERISTICS
PARAMETER
Operating Voltage
Regulated Output Voltage (Note 4)
LT3009-1.2: V
IN
= 1.7V, I
LOAD
= 100μA
1.7V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-1.5: V
IN
= 2V, I
LOAD
= 100μA
2V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-1.8: V
IN
= 2.3V, I
LOAD
= 100μA
2.3V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-2.5: V
IN
= 3V, I
LOAD
= 100μA
3V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-3.3: V
IN
= 3.8V, I
LOAD
= 100μA
3.8V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-5: V
IN
= 5.5V, I
LOAD
= 100μA
3.8V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
ADJ Pin Voltage (Notes 3, 4)
Line Regulation (Note 3)
V
IN
= 1.6V, I
LOAD
= 100μA
1.6V < V
IN
< 20V, 1μA < I
LOAD
< 20mA
LT3009-1.2:
LT3009-1.5:
LT3009-1.8:
LT3009-2.5:
LT3009-3.3:
LT3009-5:
LT3009:
LT3009-1.2:
LT3009-1.5:
LT3009-1.8:
LT3009-2.5:
LT3009-3.3:
LT3009-5:
LT3009:
V
IN
= 1.7V to 20V, I
LOAD
= 1mA
V
IN
= 2.0V to 20V, I
LOAD
= 1mA
V
IN
= 2.3V to 20V, I
LOAD
= 1mA
V
IN
= 3.0V to 20V, I
LOAD
= 1mA
V
IN
= 3.8V to 20V, I
LOAD
= 1mA
V
IN
= 5.5V to 20V, I
LOAD
= 1mA
V
IN
= 1.6V to 20V, I
LOAD
= 1mA
V
IN
= 1.7V, I
LOAD
= 1μA to 20mA
V
IN
= 2V, I
LOAD
= 1μA to 20mA
V
IN
= 2.3V, I
LOAD
= 1μA to 20mA
V
IN
= 3V, I
LOAD
= 1μA to 20mA
V
IN
= 3.8V, I
LOAD
= 1μA to 20mA
V
IN
= 5.5V, I
LOAD
= 1μA to 20mA
V
IN
= 1.6V, I
LOAD
= 1μA to 20mA
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. (Note 2)
CONDITIONS
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
l
l
l
l
MIN
1.6
1.188
1.176
1.485
1.470
1.782
1.764
2.475
2.45
3.267
3.234
4.950
4.900
594
588
TYP
1.2
1.2
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5
5
600
600
0.8
1.0
1.2
1.7
2.2
3.3
0.4
1.4
1.8
2.1
2.9
3.9
5.8
0.7
115
170
250
280
3
MAX
20
1.212
1.224
1.515
1.530
1.818
1.836
2.525
2.55
3.333
3.366
5.050
5.100
606
612
3.0
3.8
4.5
6.3
8.3
12.5
1.5
6
7.5
9.0
12.5
16.5
25
3
180
250
250
350
310
410
350
450
6
UNITS
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
mV
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
μA
Load Regulation (Note 3)
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 5, 6)
I
LOAD
= 100μA
I
LOAD
= 100μA
I
LOAD
= 1mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 10mA
I
LOAD
= 20mA
I
LOAD
= 20mA
Quiescent Current (Notes 6, 7)
GND Pin Current
V
IN
= V
OUT(NOMINAL)
+ 0.5V (Notes 6, 7)
I
LOAD
= 0μA
I
LOAD
= 0μA
I
LOAD
= 0μA
I
LOAD
= 100μA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 20mA
3
6
23
200
450
6
12
50
500
1000
3009fd
4
LT3009 Series
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage Noise (Note 9)
ADJ Pin Bias Current
Shutdown Threshold
SHDN
Pin Current
Quiescent Current in Shutdown
Ripple Rejection (Note 3)
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V, V
IN
= 20V
V
SHDN
= 20V, V
IN
= 20V
V
IN
= 6V, V
SHDN
= 0V
V
IN
– V
OUT
= 1.5V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 20mA
LT3009
LT3009-1.2
LT3009-1.5
LT3009-1.8
LT3009-2.5
LT3009-3.3
LT3009-5
Current Limit
Input Reverse Leakage Current
Reverse Output Current
V
IN
= 20V, V
OUT
= 0
V
IN
= V
OUT(NOMINAL)
+ 1V, V
OUT
= – 5%
V
IN
= –20V, V
OUT
= 0
V
OUT
= 1.2V, V
IN
= 0
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. (Note 2)
CONDITIONS
C
OUT
= 1μF, I
LOAD
= 20mA, BW = 10Hz to 100kHz
l
l
l
l
l
l
MIN
–10
0.2
TYP
150
0.3
0.66
0.36
0.5
MAX
10
1.5
±1
1.6
<1
UNITS
μV
RMS
nA
V
V
μA
μA
μA
60
57
55.5
54
52
49
44
22
72
68
67
66
63
61
56
60
200
0.6
350
10
dB
dB
dB
dB
dB
dB
dB
mA
mA
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:
The LT3009 regulators are tested and specified under pulse
load conditions such that T
J
≈ T
A
. The LT3009E is guaranteed to meet
performance specifications from 0°C to 125°C operating junction
temperature. Specifications over the –40 °C to 125°C operating junction
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3009I is guaranteed over the full
–40°C to 125°C operating junction temperature range.
Note 3:
The LT3009 adjustable version is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 4:
Operating conditions are limited by maximum junction temperature.
The regulated output voltage specification will not apply for all possible
combinations of input voltage and output current. When operating at the
maximum input voltage, the output current range must be limited. When
operating at the maximum output current, the input voltage must be limited.
Note 5:
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
). For the LT3009-1.2, dropout
voltage will be limited by the minimum input voltage under some voltage/
load conditions.
Note 6:
To satisfy minimum input voltage requirements, the LT3009
adjustable version is tested and specified for these conditions with an
external resistor divider (61.9k bottom, 280k top) which sets V
OUT
to 3.3V.
The external resistor divider adds 9.69μA of DC load on the output. This
external current is not factored into GND pin current.
Note 7:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 0.5V and a
current source load. GND pin current will increase in dropout. For the fixed
output voltage versions, an internal resistor divider will add to the GND
pin current ( 2μA for the LT3009-5, 1μA for the LT3009-1.2, LT3009-1.5,
LT3009-1.8, LT3009-2.5 and LT3009-3.3). See the GND Pin Current curves
in the Typical Performance Characteristics section.
Note 8:
The
SHDN
pin can be driven below GND only when tied to the IN
pin directly or through a pull-up resistor. If the
SHDN
pin is driven below
GND by more than –0.3V while IN is powered, the output will turn on.
Note 9:
Output noise is listed for the adjustable version with the ADJ pin
connected to the OUT pin. See the RMS Output Noise vs Load Current
curve in the Typical Performance Characteristics Section.
C++ 属于面向对象的编程语言，OOP的思想不必多说，特别对于复杂的软件工程来说，利用OOP绝对是事半功倍，相对于传统的C来说； 当然用C来写单片机程序无可厚非，已经延续了一个传统，从大学时学的开始到工作岗位，好多人都是一直用C来做，但是既然Keil支持C++编译， 可以用C++来编写你的代码，可以利用高级语言来结构化，清晰化你的程序，为嘛不用呢！哈哈，个人看法！下面进入正题： C+...[详细]
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