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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge

LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge
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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 1

LT3061 45V VIN, Micropower, Low Noise, 100mA LDO with Output Discharge Description Input Voltage Range: 1.6V to 45V Output Current: 100mA Output Discharge Quiescent Current: 45µA Dropout Voltage: 250mV Low Noise: 30µVRMS (10Hz to 100kHz) Adjustable Output (VREF = 600mV) Output Tolerance: ±2% Over Load, Line, and Temperature Single Capacitor Soft-Starts Reference and Lowers Output Noise Shutdown Current: < 3µA Reverse Battery Protection Current Limit Foldback and Thermal Limit Protection 8-Lead 2mm × 3mm DFN and MSOP Packages The LT®3061 is a micropower, low dropout (LDO) linear regulator that operates over a 1.6V to 45V supply range. The device supplies 100mA of output current with a typical dropout voltage of 250mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality. The LT3061’s quiescent current is merely 45μA and provides fast transient response with a minimum 3.3μF output capacitor. In shutdown, quiescent current is less than 3μA and the reference soft start capacitor is reset. The LT3061 features an NMOS pull-down that discharges the output when SHDN or IN is driven low. Internal protection circuitry includes reverse-battery protection, reverse-current protection, current limit with foldback and thermal shutdown. The LT3061 is available as an adjustable device with an output voltage range from the 600mV reference up to 19V. The LT3061 is offered in the thermally enhanced 8-lead 2mm × 3mm DFN and MSOP packages. Battery Powered Systems Automotive Power Supplies Industrial Power Supplies Avionic Power Supplies Portable Instruments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application Output Discharge vs VOUT CREF/BYP = 0 VIN = VOUT +1V COUT = 10µF IFB-DIVIDER = 10µA

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 2

LT3061 Absolute Maximum Ratings (Note 1) MS8E PACKAGE 8-LEAD PLASTIC MSOP DCB PACKAGE 8-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 38°C/W TO 45°C/W, θJC = 3.5°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB TJMAX = 150°C, θJA = 29°C/W TO 45°C/W, θJC = 5°C/W TO 10°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB Order Information LEAD FREE FINISH PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC...

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 3

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) PARAMETER Minimum Input Voltage (Note 4) VIN = 2.1V, ILOAD = 1mA 2.1V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-Grades) 2.1V < VIN < 45V, 1mA < ILOAD < 100mA (MP-, H-Grades) Line Regulation (Note 4) ΔVIN = 2.1V to 45V, ILOAD = 1mA (E-, I-Grades) ΔVIN = 2.1V to 45V, ILOAD = 1mA (MP-, H-Grades) Load Regulation (Note 4) VIN = 2.1V, ∆ILOAD = 1mA to 100mA (E-, I-Grades) VIN = 2.1V, ∆ILOAD = 1mA to 100mA (MP-, H-Grades) Dropout Voltage VIN = VOUT(NOMINAL)...

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 4

LT3061 Electrical Characteristics Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Absolute maximum input to output differential voltage is not achievable with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 50V, the OUT pin may not be pulled below 0V. The total measured voltage from IN to OUT must not exceed ±50V. Note 3: The LT3061 is tested and specified under pulse load conditions...

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 5

LT3061 Typical Performance Characteristics Typical Dropout Voltage Guaranteed Dropout Voltage 450 Quiescent Current Quiescent Current TA = 25°C, unless otherwise noted.

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 6

LT3061 Typical Performance Characteristics SHDN Pin Input Current SHDN Pin Input Current 3.0 SHDN PIN INPUT CURRENT (µA) 3.0 SHDN PIN INPUT CURRENT (µA) TA = 25°C, unless otherwise noted. VIN = 7V 225 VOUT = 0V OUTPUT DISCHARGE TIME (ms) Output Discharge Time COUT = 10µF, VIN = VOUT +1V 7 6 5 COUT = 10µF 3.5 VIN = VOUT +1V 3.0 2.5 2.0 1.5 OUTPUT DISCHARGE FOLDBACK STARTS OUTPUT DISCHARGE TIME (ms) Output Discharge Time 4.0 Internal Current Limit TJ = 150°C TJ = 125°C TJ = 25°C TJ = –40°C TJ = –55°C Internal Current Limit 250 Output Discharge vs VOUT CREF/BYP = 0 Output Discharge vs VOUT...

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 7

LT3061 Typical Performance Characteristics Reverse Output Current Input Ripple Rejection CREF/BYP = CFF = 0 CREF/BYP = 10nF, CFF = 0 CREF/BYP = 10nF, CFF = 10nF 100 Minimum Input Voltage 2.2 Input Ripple Rejection VIN = 6.5V +50mVRMS RIPPLE ILOAD = 100mA COUT = 10µF VOUT = 5V 2.0 MINIMUM INPUT VOLTAGE (V) VIN = VSHDN = 2.1V 45 VADJ = VOUT Input Ripple Rejection Reverse Output Current TA = 25°C, unless otherwise noted. 5V Transient Response CFF = 0, IOUT = 10mA to 100mA Load Regulation 5V Transient Response CFF = 10nF, IOUT = 10mA to 100mA

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LT 3061 45V V IN , Micropower, Low Noise, 100mA LDO with Output Discharge - 8

LT3061 Typical Performance Characteristics OUTPUT NOISE VOLTAGE (µVRMS) OUTPUT NOISE VOLTAGE (µVRMS) VOUT = 5V VOUT = 3.3V VOUT = 2.5V VOUT = 1.2V VOUT = 0.6V 5V 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 0 RMS Output Noise vs Feedforward Capacitor (CFF) 130 f = 10Hz TO 100kHz 120 CREF/BYP = 10nF VOUT = 5V COUT = 10µF 110 IFB-DIVIDER = 10µA 100 ILOAD = 100mA 90 80 VOUT = 3.3V 70 VOUT = 2.5V 60 50 40 30 VOUT = 0.6V 20 V OUT = 1.2V 10 0 0.1 10 0.01 1 FEEDFORWARD CAPACITOR, CFF (nF) 5V 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 10nF RMS Output Noise vs Load Current CREF/BYP =...

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