(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
TOP VIEW
OUT 1
OUT 2
ADJ 3
GND 4
9
8
7
6
5
IN
IN
SHDN
GND
OUT
OUT
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
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
FRONT VIEW
5
4
TAB IS
GND
3
2
1
Q PACKAGE
5-LEAD PLASTIC DD-PAK
ADJ
OUT
GND
IN
SHDN
T
JMAX
= 125°C,
θ
JA
= 60°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
FRONT VIEW
5
4
TAB IS
GND
3
2
1
T PACKAGE
5-LEAD PLASTIC TO-220
ADJ
OUT
GND
IN
SHDN
T
JMAX
= 125°C,
θ
JA
= 30°C/W
T
JMAX
= 125°C,
θ
JA
= 50°C/W
ORDER INFORMATION
LEAD FREE FINISH
LT1965EDD#PBF
LT1965EMS8E#PBF
LT1965EQ#PBF
LT1965ET#PBF
LT1965IDD#PBF
LT1965IMS8E#PBF
LT1965IQ#PBF
LT1965IT#PBF
TAPE AND REEL
LT1965EDD#TRPBF
LT1965EMS8E#TRPBF
LT1965EQ#TRPBF
LT1965ET#TRPBF
LT1965IDD#TRPBF
LT1965IMS8E#TRPBF
LT1965IQ#TRPBF
LT1965IT#TRPBF
PART MARKING*
LCXW
LTCXX
LT1965Q
LT1965T
LCXW
LTCXX
LT1965Q
LT1965T
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
5-Lead Plastic DD-PAK
5-Lead Plastic TO-220
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
5-Lead Plastic DD-PAK
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
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/
1965f
2
LT1965
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage (Notes 4, 12)
ADJ Pin Voltage (Notes 4, 5)
Line Regulation (Note 4)
Load Regulation
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 6, 7, 12)
CONDITIONS
I
LOAD
= 0.5A
I
LOAD
= 1.1A
V
IN
= 2.1V, I
LOAD
= 1mA
2.3V < V
IN
< 20V, 1mA < I
LOAD
< 1.1A
ΔV
IN
= 2.1V to 20V, I
LOAD
= 1mA
V
IN
= 2.3V,
ΔI
LOAD
= 1mA to 1.1A
V
IN
= 2.3V,
ΔI
LOAD
= 1mA to 1.1A
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
V
OUT
= Off to On
V
OUT
= On to Off
V
⎯
S
⎯
H
⎯
D
⎯
N
= 0V
V
⎯
S
⎯
H
⎯
D
⎯
N
= 20V
V
IN
= 6V, V
⎯
S
⎯
H
⎯
D
⎯
N
= 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,
ΔV
OUT
= -0.1V (Note 6)
V
IN
= –20V, V
OUT
= 0
V
OUT
= 1.2V, V
IN
< 1.2V (Note 4)
175
●
●
●
●
●
●
●
The
●
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
1.182
1.164
1.20
1.20
3
4.25
0.05
●
MAX
2.3
1.218
1.236
8
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
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
A
A
0.10
●
0.19
●
0.29
●
●
●
●
●
●
0.5
0.6
2.2
8.2
21
40
1.3
0.2
0.85
0.45
0.01
5.5
0.01
57
75
2
1.2
Output Voltage Noise
ADJ Pin Bias Current (Notes 4, 9)
Shutdown Threshold
⎯
S
⎯
H
⎯
D
⎯
N Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection
Current Limit
Input Reverse Leakage Current
Reverse Output Current (Note 11)
1
400
mA
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 is tested and specified under pulse load conditions
such that T
J
≅
T
A
. The LT1965E is 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 is guaranteed over the full
–40°C to 125°C operating junction temperature range.
Note 4:
The LT1965 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 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.
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. See
GND pin current curves in the Typical Performance Characteristics section.
1965f
3
LT1965
ELECTRICAL CHARACTERISTICS
Note 9:
ADJ pin bias current flows into the ADJ pin.
Note 10:
⎯
S
⎯
H
⎯
D
⎯
N pin current flows into the
⎯
S
⎯
H
⎯
D
⎯
N 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, 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
根据Keil公司提供的一份关于实现AGDI接口的Sample Code,有几个问题想问下大家！
（1）
//----------------------------------------------------------
//--- get a copy of all memory sl ......
PCB设计
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