LT3092ESTTR

LT3092 200mA 2-Terminal Programmable Current Source FEATURES n n n n n n n n n n n DESCRIPTION The LT®3092 is a programmable 2-terminal current source. It requires only two resistors to set an output current between 0.5mA and 200mA. A multitude of analog techniques lend themselves to actively programming the output current. The LT3092 is stable without input and output capacitors, offering high DC and AC impedance. This feature allows operation in intrinsically safe applications. The SET pin features 1% initial accuracy and low temperature coefficient. Current regulation is better than 10ppm/V from 1.5V to 40V. The LT3092 can operate in a 2-terminal current source configuration in series with signal lines. It is ideal for driving sensors, remote supplies, and as a precision current limiter for local supplies. Internal protection circuitry includes reverse-battery and reverse-current protection, current limiting and thermal limiting. The LT3092 is offered in the 8-lead TSOT-23, 3-lead SOT-223 and 8-lead 3mm × 3mm DFN packages. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 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 OUT 4.99Ω More Efficient Current Source 0.22μF VIN 36V SHDN BOOST SW BIAS C3 47μF ZVP3306F 1nF 1k LT3092 100Ω 10μA IN 33μH VIN + – LT3470A FB GND + – SET OUT 1Ω 20k 3092 TA17 IOUT 3092fb 18 LT3092 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.675 ± 0.05 0.38 ± 0.10 8 3.5 ± 0.05 1.65 ± 0.05 2.15 ± 0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 2.38 ± 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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 PIN 1 TOP MARK (NOTE 6) 3.00 ± 0.10 (4 SIDES) 1.65 ± 0.10 (2 SIDES) (DD) DFN 1203 0.200 REF 0.75 ± 0.05 4 0.25 ± 0.05 2.38 ± 0.10 (2 SIDES) 1 0.50 BSC 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE ST Package 3-Lead Plastic SOT-223 (Reference LTC DWG # 05-08-1630) .248 – .264 (6.30 – 6.71) .114 – .124 (2.90 – 3.15) .059 MAX .129 MAX .264 – .287 (6.70 – 7.30) .130 – .146 (3.30 – 3.71) .248 BSC .039 MAX .059 MAX .090 BSC .181 MAX .0905 (2.30) BSC .071 (1.80) MAX .033 – .041 (0.84 – 1.04) RECOMMENDED SOLDER PAD LAYOUT 10 – 16 10 MAX .010 – .014 (0.25 – 0.36) 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 3092fb 19 LT3092 PACKAGE DESCRIPTION TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637) 2.90 BSC (NOTE 4) 0.52 MAX 0.65 REF 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.65 BSC 0.80 – 0.90 0.22 – 0.36 8 PLCS (NOTE 3) 0.20 BSC DATUM ‘A’ 1.00 MAX 0.01 – 0.10 0.30 – 0.50 REF NOTE: 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 1. DIMENSIONS ARE IN MILLIMETERS 6. JEDEC PACKAGE REFERENCE IS MO-193 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 0.09 – 0.20 (NOTE 3) 1.95 BSC TS8 TSOT-23 0802 3092fb 20 LT3092 REVISION HISTORY REV B DATE 12/09 DESCRIPTION Update Order Information (Revision history begins at Rev B) PAGE NUMBER 2 3092fb 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. 21 LT3092 TYPICAL APPLICATIONS USB LED Driver USB LT3092 10μA IN LT3092 10μA IN Current Limiter for Remote Power VIN + – SET SET OUT 1Ω 20k 200mA LED 3092 TA18 3092 TA19 + – OUT 4.99Ω LDO VOUT 100k ADJUST LIMIT RELATED PARTS PART NUMBER LDO LT1761 LT1762 LTC1844 LT1962 LT1964 LT3008 LT3009 LT3020 LTC3025 LTC3035 LT3080/ LT3080-1 100mA, Low Noise LDO 150mA, Low Noise LDO 150mA, Very Low Dropout LDO 300mA, Low Noise LDO 200mA, Low Noise, Negative LDO 20mA, 45V, 3μA IQ Micropower LDO 20mA, 20V, 3μA IQ Micropower LDO 100mA, Low Voltage VLDO Linear Regulator 300mA Micropower VLDO Linear Regulator 300mA VLDO Linear Regulator with Charge Pump Bias Generator 1.1A, Parallelable, Low Noise, Low Dropout Linear Regulator 300mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, ThinSOT™ Package 300mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, MS8 Package 80mV Dropout Voltage, Low Noise