Datasheet LT3050 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs |
| Pages / Page | 26 / 1 — FEATURES. DESCRIPTION. Output Current Monitor: 1/100th of IOUT. Fault … |
| File Format / Size | PDF / 409 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Output Current Monitor: 1/100th of IOUT. Fault Indicator: Current Limit, Minimum IOUT or. Thermal Limit
Model Line for this Datasheet
- LT3050EDDB#PBF LT3050EDDB#TRMPBF LT3050EDDB#TRMPBF LT3050EDDB#TRPBF LT3050EDDB#TRPBF LT3050EDDB-3.3#PBF LT3050EDDB-3.3#TRMPBF LT3050EDDB-3.3#TRMPBF LT3050EDDB-3.3#TRPBF LT3050EDDB-3.3#TRPBF LT3050EDDB-5#PBF LT3050EDDB-5#TRMPBF LT3050EDDB-5#TRMPBF LT3050EDDB-5#TRPBF LT3050EDDB-5#TRPBF LT3050EMSE#PBF LT3050EMSE#PBF LT3050EMSE#TRPBF LT3050EMSE#TRPBF LT3050EMSE-3.3#PBF LT3050EMSE-3.3#PBF LT3050EMSE-3.3#TRPBF LT3050EMSE-3.3#TRPBF LT3050EMSE-5#PBF LT3050EMSE-5#PBF LT3050EMSE-5#TRPBF LT3050EMSE-5#TRPBF LT3050IDDB#PBF LT3050IDDB#TRMPBF LT3050IDDB#TRMPBF LT3050IDDB#TRPBF LT3050IDDB#TRPBF LT3050IDDB-3.3#PBF LT3050IDDB-3.3#TRMPBF LT3050IDDB-3.3#TRMPBF LT3050IDDB-3.3#TRPBF LT3050IDDB-3.3#TRPBF LT3050IDDB-5#PBF LT3050IDDB-5#TRMPBF LT3050IDDB-5#TRMPBF LT3050IDDB-5#TRPBF LT3050IDDB-5#TRPBF LT3050IMSE#PBF LT3050IMSE#PBF LT3050IMSE#TRPBF LT3050IMSE#TRPBF LT3050IMSE-3.3#PBF LT3050IMSE-3.3#PBF LT3050IMSE-3.3#TRPBF LT3050IMSE-3.3#TRPBF LT3050IMSE-5#PBF LT3050IMSE-5#PBF LT3050IMSE-5#TRPBF LT3050IMSE-5#TRPBF LT3050MPMSE LT3050MPMSE#PBF LT3050MPMSE#PBF LT3050MPMSE#TRPBF LT3050MPMSE#TRPBF LT3050MPMSE-3.3#PBF LT3050MPMSE-3.3#PBF LT3050MPMSE-3.3#TRPBF LT3050MPMSE-3.3#TRPBF LT3050MPMSE-5#PBF LT3050MPMSE-5#PBF LT3050MPMSE-5#TRPBF LT3050MPMSE-5#TRPBF
Text Version of Document
LT3050 Series 100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs
FEATURES DESCRIPTION
n
Output Current Monitor: 1/100th of IOUT
The LT®3050 series are micro-power, low noise, low n
Fault Indicator: Current Limit, Minimum IOUT or
dropout voltage (LDO) linear regulators. The devices
Thermal Limit
supply 100mA of output current with a dropout voltage of n
Output Current: 100mA
340mV. A 10nF bypass capacitor reduces output noise to n
Dropout Voltage: 340mV
30μVRMS in a 10Hz to 100kHz bandwidth and soft-starts n
Input Voltage Range: 1.6V to 45V
the reference. The LT3050’s ±45V input voltage rating n
Programmable Precision Current Limit: ±5%
combined with its precision current limit and diagnostic n
Programmable Minimum I
functions make the IC an ideal choice for robust, high
OUT Monitor
n
Low Noise: 30μV
reliability applications.
RMS (10Hz to 100kHz)
n Adjustable Output (VREF = VOUT(MIN) = 0.6V) A single resistor programs the LT3050’s current limit, accurate n Fixed Output Voltages: 3.3V, 5V to ±5% over a wide input voltage and temperature range. n Output Tolerance: ±2% Over Line, Load and Temperature A single resistor programs the LT3050’s minimum output n Stable with Low ESR, Ceramic Output Capacitors current monitor, useful for detecting open-circuit conditions. (2.2μF minimum) The current monitor function sources a current equal to n Shutdown Current: <1μA 1/100th of output current. A logic FAULT pin asserts low if n Reverse-Battery, Reverse-Output and the LT3050 is in current limit, operating below its minimum Reverse-Current Protection output current (open-circuit) or is in thermal shutdown. n Thermal Limit Protection n The LT3050 optimizes stability and transient response 12-Lead 3mm × 2mm DFN and MSOP Packages with low ESR ceramic capacitors, requiring a minimum of 2.2μF. The LT3050 is available in fi xed output voltages of
APPLICATIONS
3.3V and 5V, and as an adjustable version with an output n voltage range down to the 0.6V reference.The LT3050 is Protected Antenna Supplies n available in the thermally-enhanced 12-Lead 3mm × 2mm Automotive Telematics n DFN and MSOP packages. Industrial Applications (Trucks, Forklifts, etc.) n High Reliability Applications 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.
TYPICAL APPLICATION External Current Limit RIMAX = 1.15k 5V Supply with 100mA Precision Current Limit, 10mA IMIN
105 VOUT = 5V 104 IN OUT 5V 103 12V SHDN 1μF 2.2μF V V 120k 102 IN = 15V IN FAULT 101 T THRESHOLD (mA) LT3050-5 100 V AUL IN = 12V IMAX 99 IMON TO μP ADC 10nF 1.15k V 3k IN = 5.6V (THRESHOLD = 100mA) 98 0.1μF (ADC FULL SCALE = 3V) 97 IMIN REF/BYP 96 CURRENT LIMIT F 0.1μF 11.3k GND (THRESHOLD = 10mA) 10nF 95–75 –50 –25 0 –25 50 75 100 125 150 175 3050 TA01 TEMPERATURE (°C) 3050 TA01a 3050fa 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
FEATURES DESCRIPTION
n
Output Current Monitor: 1/100th of IOUT
The LT®3050 series are micro-power, low noise, low n
Fault Indicator: Current Limit, Minimum IOUT or
dropout voltage (LDO) linear regulators. The devices
Thermal Limit
supply 100mA of output current with a dropout voltage of n
Output Current: 100mA
340mV. A 10nF bypass capacitor reduces output noise to n
Dropout Voltage: 340mV
30μVRMS in a 10Hz to 100kHz bandwidth and soft-starts n
Input Voltage Range: 1.6V to 45V
the reference. The LT3050’s ±45V input voltage rating n
Programmable Precision Current Limit: ±5%
combined with its precision current limit and diagnostic n
Programmable Minimum I
functions make the IC an ideal choice for robust, high
OUT Monitor
n
Low Noise: 30μV
reliability applications.
RMS (10Hz to 100kHz)
n Adjustable Output (VREF = VOUT(MIN) = 0.6V) A single resistor programs the LT3050’s current limit, accurate n Fixed Output Voltages: 3.3V, 5V to ±5% over a wide input voltage and temperature range. n Output Tolerance: ±2% Over Line, Load and Temperature A single resistor programs the LT3050’s minimum output n Stable with Low ESR, Ceramic Output Capacitors current monitor, useful for detecting open-circuit conditions. (2.2μF minimum) The current monitor function sources a current equal to n Shutdown Current: <1μA 1/100th of output current. A logic FAULT pin asserts low if n Reverse-Battery, Reverse-Output and the LT3050 is in current limit, operating below its minimum Reverse-Current Protection output current (open-circuit) or is in thermal shutdown. n Thermal Limit Protection n The LT3050 optimizes stability and transient response 12-Lead 3mm × 2mm DFN and MSOP Packages with low ESR ceramic capacitors, requiring a minimum of 2.2μF. The LT3050 is available in fi xed output voltages of
APPLICATIONS
3.3V and 5V, and as an adjustable version with an output n voltage range down to the 0.6V reference.The LT3050 is Protected Antenna Supplies n available in the thermally-enhanced 12-Lead 3mm × 2mm Automotive Telematics n DFN and MSOP packages. Industrial Applications (Trucks, Forklifts, etc.) n High Reliability Applications 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.
TYPICAL APPLICATION External Current Limit RIMAX = 1.15k 5V Supply with 100mA Precision Current Limit, 10mA IMIN
105 VOUT = 5V 104 IN OUT 5V 103 12V SHDN 1μF 2.2μF V V 120k 102 IN = 15V IN FAULT 101 T THRESHOLD (mA) LT3050-5 100 V AUL IN = 12V IMAX 99 IMON TO μP ADC 10nF 1.15k V 3k IN = 5.6V (THRESHOLD = 100mA) 98 0.1μF (ADC FULL SCALE = 3V) 97 IMIN REF/BYP 96 CURRENT LIMIT F 0.1μF 11.3k GND (THRESHOLD = 10mA) 10nF 95–75 –50 –25 0 –25 50 75 100 125 150 175 3050 TA01 TEMPERATURE (°C) 3050 TA01a 3050fa 1 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
