LT3092
200mA 2-Terminal
Programmable Current Source
Features
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Description
Programmable 2-Terminal Current Source
Maximum Output Current: 200mA
Wide Input Voltage Range: 1.2V to 40V
Input/Output Capacitors Not Required
Resistor Ratio Sets Output Current
Initial Set Pin Current Accuracy: 1%
Reverse-Voltage Protection
Reverse-Current Protection
12V
*CURRENT FOLDBACK CIRCUIT LIMITS
THE LT3092 POWER DISSIPATION
3092 TA16
More Efficient Current Source
0.22µF
VIN
+
–
VIN
BOOST
36V
33µH
SW
SHDN
BIAS
C3
47µF
LT3470A
100Ω
10µA
ZVP3306F
FB
GND
IN
LT3092
1nF
+
–
1k
SET
OUT
20k
1Ω
3092 TA17
IOUT
3092fc
For more information www.linear.com/LT3092
19
LT3092
Package Description
Please refer to http://www.linear.com/product/LT3092#packaging for the most recent package drawings.
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698 Rev C)
0.70 ±0.05
3.5 ±0.05
1.65 ±0.05
2.10 ±0.05 (2 SIDES)
PACKAGE
OUTLINE
0.25 ±0.05
0.50
BSC
2.38 ±0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
3.00 ±0.10
(4 SIDES)
R = 0.125
TYP
5
0.40 ±0.10
8
1.65 ±0.10
(2 SIDES)
0.75 ±0.05
4
0.25 ±0.05
1
(DD8) DFN 0509 REV C
0.50 BSC
2.38 ±0.10
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
20
3092fc
For more information www.linear.com/LT3092
LT3092
Package Description
Please refer to http://www.linear.com/product/LT3092#packaging for the most recent package drawings.
ST Package
3-Lead Plastic SOT-223
(Reference LTC DWG # 05-08-1630)
.248 – .264
(6.30 – 6.71)
.129 MAX
.114 – .124
(2.90 – 3.15)
.059 MAX
.264 – .287
(6.70 – 7.30)
.248 BSC
.130 – .146
(3.30 – 3.71)
.039 MAX
.059 MAX
.181 MAX
.033 – .041
(0.84 – 1.04)
.0905
(2.30)
BSC
RECOMMENDED SOLDER PAD LAYOUT
10° – 16°
.010 – .014
(0.25 – 0.36)
10°
MAX
.071
(1.80)
MAX
.090
BSC
10° – 16°
.024 – .033
(0.60 – 0.84)
.181
(4.60)
BSC
.012
(0.31)
MIN
.0008 – .0040
(0.0203 – 0.1016)
ST3 (SOT-233) 0502
3092fc
For more information www.linear.com/LT3092
21
LT3092
Package Description
Please refer to http://www.linear.com/product/LT3092#packaging for the most recent package drawings.
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637 Rev A)
0.40
MAX
2.90 BSC
(NOTE 4)
0.65
REF
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.22 – 0.36
8 PLCS (NOTE 3)
0.65 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.95 BSC
TS8 TSOT-23 0710 REV A
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
22
3092fc
For more information www.linear.com/LT3092
LT3092
Revision History
(Revision history begins at Rev B)
REV
DATE
DESCRIPTION
PAGE NUMBER
B
12/09
Update Order Information
C
2/17
Update Dropout Voltage graphs
Amended Application Circuit connection
2
6
1, 8, 9, 10, 11,
13, 14, 16, 17,
18, 19, 24
3092fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection
of its circuits
as described
herein will not infringe on existing patent rights.
For more
information
www.linear.com/LT3092
23
LT3092
Typical Applications
USB LED Driver
Current Limiter for Remote Power
VIN
USB
IN
LT3092
IN
LT3092
10µA
10µA
+
–
+
–
SET
SET
OUT
20k
100k
ADJUST LIMIT
1Ω
OUT
4.99Ω
LDO
VOUT
200mA LED
3092 TA18
3092 TA19
Related Parts
PART NUMBER
DESCRIPTION
COMMENTS
LT1761
100mA, Low Noise LDO
300mV Dropout Voltage, Low Noise: 20µVRMS, VIN = 1.8V to 20V, ThinSOT™ Package
LT1762
150mA, Low Noise LDO
300mV Dropout Voltage, Low Noise: 20µVRMS, VIN = 1.8V to 20V, MS8 Package
LTC1844
150mA, Very Low Dropout LDO
80mV Dropout Voltage, Low Noise
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