Datasheet LT3042 (Analog Devices) - 25
| Manufacturer | Analog Devices |
| Description | 20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF Linear Regulator |
| Pages / Page | 32 / 25 — TYPICAL APPLICATIONS. Ultralow 1/f Noise Reference Buffer |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
TYPICAL APPLICATIONS. Ultralow 1/f Noise Reference Buffer
Model Line for this Datasheet
- LT3042EDD#PBF LT3042EDD#PBF LT3042EDD#TRPBF LT3042EDD#TRPBF LT3042EMSE#PBF LT3042EMSE#PBF LT3042EMSE#TRPBF LT3042EMSE#TRPBF LT3042HDD#PBF LT3042HDD#PBF LT3042HDD#TRPBF LT3042HDD#TRPBF LT3042HMSE#PBF LT3042HMSE#PBF LT3042HMSE#TRPBF LT3042HMSE#TRPBF LT3042IDD#PBF LT3042IDD#PBF LT3042IDD#TRPBF LT3042IDD#TRPBF LT3042IMSE#PBF LT3042IMSE#PBF LT3042IMSE#TRPBF LT3042IMSE#TRPBF LT3042MPDD#PBF LT3042MPDD#PBF LT3042MPDD#TRPBF LT3042MPDD#TRPBF LT3042MPMSE#PBF LT3042MPMSE#PBF LT3042MPMSE#TRPBF LT3042MPMSE#TRPBF
Text Version of Document
LT3042
TYPICAL APPLICATIONS Ultralow 1/f Noise Reference Buffer
VIN IN LT3042 6V ±5% 4.7µF 100µA – EN/UV + PGFB OUT VOUT = 5V IOUT(MAX) PG 200mA 1,2 6,7 OUTS LTC6655-5 SET GND ILIM 4.7µF 3,4,5 1k 3042 TA08 10µF 49.9k 4.7µF
Paralleling Multiple Devices Using ILIM (Current Monitor) to Cancel Ballast Resistor Drop
VIN IN LT3042 LT3042 IN 5V ±5% 22µF 100µA 100µA – – EN/UV VOUT = 3.3V EN/UV + IOUT(MAX) = 400mA + PGFB PGFB OUT OUT PG 50mΩ OUTS 50mΩ PG OUTS SET GND ILIM 4.7µF 4.7µF ILIM GND SET RILIM 549Ω 549Ω 3042 TA09 1µF 16.5k N = NUMBER OF DEVICES IN PARALLEL RCDC RILIM = 125mA • kΩ/ILIM – RCDC • N RCDC = CABLE (BALLAST RESISTOR) DROP CANCELLATION RESISTOR 10Ω = 549Ω (FOR 200mA ILIM PER REGULATOR) RILIM = CURRENT LIMIT PROGRAMMING RESISTOR R R CDC = RBALLAST • 400/N BALLAST = BALLAST RESISTOR = 10Ω ILIM = OUTPUT CURRENT LIMIT 3042fb For more information www.linear.com/LT3042 25 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL APPLICATIONS Ultralow 1/f Noise Reference Buffer
VIN IN LT3042 6V ±5% 4.7µF 100µA – EN/UV + PGFB OUT VOUT = 5V IOUT(MAX) PG 200mA 1,2 6,7 OUTS LTC6655-5 SET GND ILIM 4.7µF 3,4,5 1k 3042 TA08 10µF 49.9k 4.7µF
Paralleling Multiple Devices Using ILIM (Current Monitor) to Cancel Ballast Resistor Drop
VIN IN LT3042 LT3042 IN 5V ±5% 22µF 100µA 100µA – – EN/UV VOUT = 3.3V EN/UV + IOUT(MAX) = 400mA + PGFB PGFB OUT OUT PG 50mΩ OUTS 50mΩ PG OUTS SET GND ILIM 4.7µF 4.7µF ILIM GND SET RILIM 549Ω 549Ω 3042 TA09 1µF 16.5k N = NUMBER OF DEVICES IN PARALLEL RCDC RILIM = 125mA • kΩ/ILIM – RCDC • N RCDC = CABLE (BALLAST RESISTOR) DROP CANCELLATION RESISTOR 10Ω = 549Ω (FOR 200mA ILIM PER REGULATOR) RILIM = CURRENT LIMIT PROGRAMMING RESISTOR R R CDC = RBALLAST • 400/N BALLAST = BALLAST RESISTOR = 10Ω ILIM = OUTPUT CURRENT LIMIT 3042fb For more information www.linear.com/LT3042 25 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts