LT3050 - 100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs

The LT3050 series are micro-power, low noise, low dropout voltage (LDO) linear regulators. The devices supply 100mA of output current with a dropout voltage of 340mV. A 10nF bypass capacitor reduces output noise to 30μVRMS in a 10Hz to 100kHz bandwidth and soft-starts the reference. The LT3050’s ±45V input voltage rating combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications.

A single resistor programs the LT3050’s current limit, accurate to ±5% over a wide input voltage and temperature range. A single resistor programs the LT3050’s minimum output current monitor, useful for detecting open-circuit conditions. The current monitor function sources a current equal to 1/100th of output current. A logic FAULT pin asserts low if the LT3050 is in current limit, operating below its minimum output current (open-circuit) or is in thermal shutdown.

The LT3050 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 2.2μF. The LT3050 is available in fixed output voltages of 3.3V and 5V, and as an adjustable version with an output voltage range down to the 0.6V reference.The LT3050 is available in the thermally-enhanced 12-Lead 3mm × 2mm DFN and MSOP packages.

Features

Output Current Monitor: 1/100th of IOUT
Fault Indicator: Current Limit, Minimum IOUT or Thermal Limit
Output Current: 100mA
Dropout Voltage: 340mV
Input Voltage Range: 1.6V to 45V
Programmable Precision Current Limit: ±5%
Programmable Minimum IOUT Monitor
Low Noise: 30μVRMS (10Hz to 100kHz)
Adjustable Output (VREF = VOUT(MIN) = 0.6V)
Fixed Output Voltages: 3.3V, 5V
Output Tolerance: ±2% Over Line, Load and Temperature
Stable with Low ESR, Ceramic Output Capacitors (2.2μF minimum)
Shutdown Current: <1μA
Reverse-Battery, Reverse-Output and Reverse-Current Protection
Thermal Limit Protection
12-Lead 3mm × 2mm DFN and MSOP Packages

Typical Application

Applications

Protected Antenna Supplies
Automotive Telematics
Industrial Applications (Trucks, Forklifts, etc.)
High Reliability Applications

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LT3050EDDB-3.3#PBF	3x2 DFN-12	E	$2.22
LT3050EDDB-3.3#TRMPBF	3x2 DFN-12	E	$2.22	$1.60
LT3050EDDB-3.3#TRPBF	3x2 DFN-12	E	$2.22	$1.55
LT3050EDDB-5#PBF	3x2 DFN-12	E	$2.22
LT3050EDDB-5#TRMPBF	3x2 DFN-12	E	$2.22	$1.60
LT3050EDDB-5#TRPBF	3x2 DFN-12	E	$2.22	$1.55
LT3050EDDB#PBF	3x2 DFN-12	E	$2.22
LT3050EDDB#TRMPBF	3x2 DFN-12	E	$2.22	$1.60
LT3050EDDB#TRPBF	3x2 DFN-12	E	$2.22	$1.55
LT3050EMSE-3.3#PBF	MS-12E	E	$2.22	$1.55
LT3050EMSE-3.3#TRPBF	MS-12E	E		$1.61
LT3050EMSE-5#PBF	MS-12E	E	$2.22	$1.55
LT3050EMSE-5#TRPBF	MS-12E	E		$1.61
LT3050EMSE#PBF	MS-12E	E	$2.22	$1.55
LT3050EMSE#TRPBF	MS-12E	E		$1.61
LT3050IDDB-3.3#PBF	3x2 DFN-12	I	$2.50
LT3050IDDB-3.3#TRMPBF	3x2 DFN-12	I	$2.50	$1.80
LT3050IDDB-3.3#TRPBF	3x2 DFN-12	I	$2.50	$1.75
LT3050IDDB-5#PBF	3x2 DFN-12	I	$2.50
LT3050IDDB-5#TRMPBF	3x2 DFN-12	I	$2.50	$1.80
LT3050IDDB-5#TRPBF	3x2 DFN-12	I	$2.50	$1.75
LT3050IDDB#PBF	3x2 DFN-12	I	$2.50
LT3050IDDB#TRMPBF	3x2 DFN-12	I	$2.50	$1.80
LT3050IDDB#TRPBF	3x2 DFN-12	I	$2.50	$1.75
LT3050IMSE-3.3#PBF	MS-12E	I	$2.50	$1.75
LT3050IMSE-3.3#TRPBF	MS-12E	I		$1.81
LT3050IMSE-5#PBF	MS-12E	I	$2.50	$1.75
LT3050IMSE-5#TRPBF	MS-12E	I		$1.81
LT3050IMSE#PBF	MS-12E	I	$2.50	$1.75
LT3050IMSE#TRPBF	MS-12E	I		$1.81
LT3050MPMSE	MS-12E	MP	$5.99	$4.19
LT3050MPMSE-3.3#PBF	MS-12E	MP	$5.99	$4.19
LT3050MPMSE-3.3#TRPBF	MS-12E	MP		$4.25
LT3050MPMSE-5#PBF	MS-12E	MP	$5.99	$4.19
LT3050MPMSE-5#TRPBF	MS-12E	MP		$4.25
LT3050MPMSE#PBF	MS-12E	MP	$5.99	$4.19
LT3050MPMSE#TRPBF	MS-12E	MP		$4.25

Demo Boards


Part Number	Description	Price
DC1515A	LT3050EDDB Demo Board \| Micropower Low Noise, Low Dropout Linear Regulator, Current Limit, Diagnostics, 2V ≤ VIN ≤ 45V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5V/Adj @ 100mA	$100.00