EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*PIN 5: ADJ FOR LT3022
SENSE FOR LT3022-1.2/LT3022-1.5/LT3022-1.8
**SEE THE APPLICATIONS INFORMATION SECTION
DHC PACKAGE
16-LEAD (5mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
q
JA
= 38°C/W*,
q
JC
= 4°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*SEE THE APPLICATIONS INFORMATION SECTION
3022fb
2
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ORDER INFORMATION
LEAD FREE FINISH
LT3022EDHC#PBF
LT3022IDHC#PBF
LT3022EMSE#PBF
LT3022IMSE#PBF
LT3022EMSE-1.2#PBF
LT3022IMSE-1.2#PBF
LT3022EMSE-1.5#PBF
LT3022IMSE-1.5#PBF
LT3022EMSE-1.8#PBF
LT3022IMSE-1.8#PBF
LEAD BASED FINISH
LT3022EDHC
LT3022IDHC
LT3022EMSE
LT3022IMSE
LT3022EMSE-1.2
LT3022IMSE-1.2
LT3022EMSE-1.5
LT3022IMSE-1.5
LT3022EMSE-1.8
LT3022IMSE-1.8
TAPE AND REEL
LT3022EDHC#TRPBF
LT3022IDHC#TRPBF
LT3022EMSE#TRPBF
LT3022IMSE#TRPBF
LT3022EMSE-1.2#TRPBF
LT3022IMSE-1.2#TRPBF
LT3022EMSE-1.5#TRPBF
LT3022IMSE-1.5#TRPBF
LT3022EMSE-1.8#TRPBF
LT3022IMSE-1.8#TRPBF
TAPE AND REEL
LT3022EDHC#TR
LT3022IDHC#TR
LT3022EMSE#TR
LT3022IMSE#TR
LT3022EMSE-1.2#TR
LT3022IMSE-1.2#TR
LT3022EMSE-1.5#TR
LT3022IMSE-1.5#TR
LT3022EMSE-1.8#TR
LT3022IMSE-1.8#TR
PART MARKING*
3022
3022
3022
3022
302212
302212
302215
302215
302218
302218
PART MARKING*
3022
3022
3022
3022
302212
302212
302215
302215
302218
302218
PACKAGE DESCRIPTION
16-Lead (5mm
×
3mm) Plastic DFN
16-Lead (5mm
×
3mm) Plastic DFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
PACKAGE DESCRIPTION
16-Lead (5mm
×
3mm) Plastic DFN
16-Lead (5mm
×
3mm) Plastic DFN
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
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
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
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/
3022fb
3
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage (Notes 4, 6)
ADJ Pin Voltage (Notes 5, 6)
Regulated Output Voltage (Note 5)
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
CONDITIONS
I
LOAD
= 1A, T
A
> 0°C
I
LOAD
= 1A, T
A
≤ 0°C
V
IN
= 1.5V, I
LOAD
= 1mA
1.15V < V
IN
< 10V, 1mA < I
LOAD
< 1A
LT3022-1.2
LT3022-1.5
LT3022-1.8
V
IN
= 1.5V, I
LOAD
= 1mA
1.5V < V
IN
< 10V, 1mA < I
LOAD
<1A
V
IN
= 1.8V, I
LOAD
= 1mA
1.8V < V
IN
< 10V, 1mA < I
LOAD
<1A
V
IN
= 2.1V, I
LOAD
= 1mA
2.1V < V
IN
< 10V, 1mA < I
LOAD
<1A
∆V
IN
= 1.15V to 10V, I
LOAD
= 1mA
∆V
IN
= 1.5V to 10V, I
LOAD
= 1mA
∆V
IN
= 1.8V to 10V, I
LOAD
= 1mA
∆V
IN
= 2.1V to 10V, I
LOAD
= 1mA
V
IN
= 1.15V, ∆I
LOAD
= 1mA to 1A
l
l
l
l
l
l
l
l
l
MIN
TYP
0.9
0.9
MAX
1.05
1.10
204
206
1.224
1.236
1.530
1.545
1.836
1.854
0.5
3.5
4
5
0.5
1.0
3
6
3.8
7.5
4.5
9
75
135
90
175
150
235
185
285
3.5
8.5
20
36
UNITS
V
V
mV
mV
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
µA
mA
mA
mA
mA
µV
RMS
196
194
1.176
1.164
1.470
1.455
1.764
1.746
–1.5
–9
–11
–13.5
–0.5
–1.0
–3
–6
–3.8
–7.5
–4.5
–9
200
200
1.200
1.200
1.500
1.500
1.800
1.800
–0.1
0.6
0.8
1
0.1
0.6
1
1.2
45
Line Regulation (Note 7)
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
Load Regulation (Note 7)
V
IN
= 1.5V, ∆I
LOAD
= 1mA to 1A
l
V
IN
= 1.8V, ∆I
LOAD
= 1mA to 1A
l
V
IN
= 2.1V, ∆I
LOAD
= 1mA to 1A
l
Dropout Voltage (Notes 8, 9)
I
LOAD
= 10mA
l
I
LOAD
= 100mA
l
55
110
l
I
LOAD
= 500mA
I
LOAD
= 1A
l
145
400
1.2
3.4
8.3
18
165
30
l
l
l
l
GND Pin Current, V
IN
= V
OUT(NOMINAL)
+ 0.4V
(Notes 9, 10)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 1A
C
OUT
= 10µF I
LOAD
= 1A, BW = 10Hz to 100kHz,
,
V
OUT
= 1.2V
V
ADJ
= 0.2V, V
IN
= 1.5V
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V, V
IN
= 10V
V
SHDN
= 10V, V
IN
= 10V
V
IN
= 6V, V
SHDN
= 0V
l
l
l
l
Output Voltage Noise
ADJ Pin Bias Current (Notes 7, 11)
Shutdown Threshold
SHDN
Pin Current (Note 12)
Quiescent Current in Shutdown
100
0.9
±1
9.5
15
nA
V
V
µA
µA
µA
0.25
0.64
0.64
3
7.5
3022fb
4
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Ripple Rejection (Note 13)
CONDITIONS
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
Current Limit (Note 9)
Input Reverse Leakage Current (Note 14)
Reverse Output Current (Notes 15, 16)
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 1A
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 1A
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 1A
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
,
f
RIPPLE
= 120Hz, I
LOAD
= 1A
l
ELECTRICAL CHARACTERISTICS
MIN
55
51
51
51
TYP
70
66
66
66
2.6
1.7
4
0.1
0.1
0.1
0.1
MAX
UNITS
dB
dB
dB
dB
A
A
V
IN
= 10V, V
OUT
= 0V
V
IN
= V
OUT(NOMINAL)
+ 0.5V, ∆V
OUT
≤ –5%
V
IN
= –10V, V
OUT
= 0V
LT3022
LT3022-1.2
LT3022-1.5
LT3022-1.8
V
OUT
= 1.2V, V
IN
= 0V
V
OUT
= 1.2V, V
IN
= 0V
V
OUT
= 1.5V, V
IN
= 0V
V
OUT
= 1.8V, V
IN
= 0V
1.1
40
5
5
5
5
µA
µA
µA
µA
µA
mA
Minimum Required Output Current
V
IN
= 1.6V, V
OUT
= 1.2V
l
1
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 LT3022 regulator is tested and specified under pulse load
conditions such that T
J
≈ T
A
. The LT3022 is 100% tested at T
A
= 25°C.
Performance of the LT3022E over the full –40°C and 125°C operating
junction temperature range is assured by design, characterization and
correlation with statistical process controls. The LT3022I regulators are
guaranteed over the full –40°C to 125°C operating junction temperature
range. High junction temperatures degrade operating lifetime. Operating
lifetime is derated at junction temperatures greater than 125°C.
Note 3:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 4:
Minimum input voltage is the voltage required by the LT3022 to
regulate the output voltage and supply the rated 1A output current. This
specification is tested at V
OUT
= 0.2V. For higher output voltages, the
minimum input voltage required for regulation equals the regulated output
voltage V
OUT
plus the dropout voltage or 1.1V, whichever is greater.
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 maximum input voltage. Limit the input-to-output
voltage differential range if operating at maximum output current.
Note 6:
The LT3022 typically supplies 1A output current with a 0.9V input
supply. The guaranteed minimum input voltage for 1A output current is
1.10V, especially if cold temperature operation is required.
Note 7:
The LT3022 is tested and specified for these conditions with ADJ
tied to OUT. Specifications for fixed output voltage devices are referred to
the output voltage.
Note 8:
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 9:
The LT3022 is tested and specified for these conditions with
an external resistor divider (3.92k and 19.6k) setting V
OUT
to 1.2V. The
external resistor divider adds 50µA of load current.
Note 10:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 0.4V and a
current source load. GND pin current increases in dropout. See GND pin
current curves in the Typical Performance Characteristics section.
Note 11:
Adjust pin bias current flows out of the ADJ pin.
Note 12:
Shutdown pin current flows into the
SHDN
pin.
Note 13:
The LT3022 is tested and specified for this condition with an
external resistor divider (3.92k and 5.9k) setting V
OUT
to 0.5V. The external
resistor divider adds 50µA of load current. The specification refers to
the change in the 0.2V reference voltage, not the 0.5V output voltage.
Specifications for fixed output voltage devices are referred to the output
voltage.
Note 14:
Input reverse leakage current flows out of the IN pin.
Note 15:
Reverse output current is tested with IN grounded and OUT
forced to the rated output voltage. This current flows into the OUT pin and
out of the GND pin.
Note 16:
Reverse current is higher for the case of (rated_output)
< V
OUT
< V
IN
, because the no-load recovery circuitry is active in this region
and is trying to restore the output voltage to its nominal value.
多通道 LED 驱动器主要是为采用单个 IC 来给多个 LED 或多个 LED 灯串 (这些灯串有时具有不同的色彩或长度) 供电而设计的。然而，此类驱动器包括了诸多的特性，可实现其他引人注目的用途。例如，LT3797 三通道 LED 驱动器就能够通过配置以提供 “先升压后降压” (boost-then-buck) 的能力，其中一个通道被配置为升压预调节器，而另两个通道则被配置为降压模式 LE...[详细]
FPGA/CPLD
