LT1764-1.8 LINER [Linear Technology], LT1764-1.8 Datasheet
LT1764-1.8
Related parts for LT1764-1.8
LT1764-1.8 Summary of contents
Page 1
... LT1764 has very low output voltage noise which makes the device ideal for sensitive RF supply applications. Output voltage range is from 1.21V to 20V. The LT1764 regulators are stable with output capacitors as low Internal protection circuitry includes reverse battery pro- tection, current limiting, thermal limiting and reverse cur- rent protection ...
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... OUT TAB IS 3 GND GND SHDN Q PACKAGE 5-LEAD PLASTIC DD *PIN 5 = SENSE FOR LT1764-1.8/ LT1764-2.5/LT1764-3.3 = ADJ FOR LT1764 T = 150 JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are T ...
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... ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are T PARAMETER CONDITIONS Line Regulation LT1764-1.5 LT1764-1.8 LT1764-2.5 LT1764-3.3 LT1764 (Note 3) Load Regulation LT1764-1.5 LT1764-1.8 LT1764-2.5 LT1764-3.3 LT1764 (Note 3) V Dropout Voltage I = 1mA LOAD 1mA IN ...
Page 4
... Note 10: Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the OUT pin and out the GND pin. Note 11. For the LT1764, LT1764-1.5 and LT1764-1.8 dropout voltage will be limited by the minimum input voltage specification under some output voltage/load conditions. ...
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... INPUT VOLTAGE (V) 1764 G11 LT1764 Series LT1764-2.5 Output Voltage 2. 1mA L 2.56 2.54 2.52 2.50 2.48 2.46 2.44 2.42 – 50 – 100 125 TEMPERATURE ( C) 1756 G06 LT1764-1.8 Quiescent Current SHDN INPUT VOLTAGE (V) ...
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... 500mA 8. 100mA 300mA INPUT VOLTAGE (V) 1764 G14 LT1764-1.8 GND Pin Current 150 SHDN IN *FOR V = 1.8V OUT 120 1.5A 0.7A ...
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... INPUT/OUTPUT DIFFERENTIAL (V) 1764 G27 Reverse Output Current 1 0 1.21V (LT1764) OUT V = 1.8V (LT1764-1.8) OUT 0 2.5V (LT1764-2.5) OUT V = 3.3V (LT1764-3.3) 0.7 OUT 0.6 LT1764-1.8/-2.5/-3.3 0.5 0.4 0.3 LT1764 0.2 0.1 0 – 125 –25 100 TEMPERATURE ( C) 1764 G30 1764fa 7 ...
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... L 1.0 0.5 0 –50 – 100 125 TEMPERATURE ( C) 1764 G33 RMS Output Noise vs Load Current (10Hz to 100kHz OUT LT1764-3 LT1764-2.5 25 LT1764-1.8 20 LT1764 0.0001 0.001 0.01 0 LOAD CURRENT (A) 1764 G36 LT1764-3.3 Transient Response 0.2 0.1 0 –0 4. – ...
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... SENSE (Pin 5): Sense. For fixed voltage versions of the LT1764 (LT1764-1.8/LT1764-2.5/LT1764-3.3), the SENSE pin is the input to the error amplifier. Optimum regulation will be obtained at the point where the SENSE pin is connected to the OUT pin of the regulator. In critical ...
Page 10
... The devices are protected against both reverse input and reverse output voltages. In battery backup applica- tions where the output can be held backup battery when the input is pulled to ground, the LT1764-X acts like it has a diode in series with its output and prevents reverse current flow. Additionally, in dual supply applications ...
Page 11
... For a ceramic capacitor the stress can be induced by vibrations in the system or thermal transients. Overload Recovery Like many IC power regulators, the LT1764-X has safe operating area protection. The safe area protection de- creases the current limit as input-to-output voltage in- creases and keeps the power transistor inside a safe operating region for all values of input-to-output voltage ...
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... Current curves in the Typical Performance Characteris- tics. Power dissipation will be equal to the sum of the two components listed above. The LT1764 series regulators have internal thermal limit- ing designed to protect the device during overload condi- tions. For continuous normal conditions, the maximum junction temperature rating of 125 C must not be exceeded ...
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... LT1764 4.0 3.5 LT1764-1.8 3.0 2.5 2.0 1.5 1.0 0 LT1764 Series CURRENT FLOWS INTO OUTPUT PIN OUT ADJ OUT FB LT1764-2.5, LT1764-3.3) LT1764-2.5 LT1764-3 OUTPUT VOLTAGE (V) Figure 5. Reverse Output Current (LT1764) (LT1764-1.8, 1764 F05 1764fa 13 ...
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... R4 R6 40.2k 2.2k 2. ADJUST R1 FOR CONSTANT CURRENT 2 – 1/2 LT1366 3.3 F LT1764-3.3 V OUT IN OUT 3. SHDN GND 34k* 12.1k* 200k 0 1N4148 A1 LT1006 10k 10k – V 10k LT1004 1.2V 1764 TA03 OUT LT1764-1.8 FB LOAD R8 GND 100k 470 1764 TA04 + 1764fa ...
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... SEATING PLANE 0.152 – 0.202 (3.861 – 5.131) 0.260 – 0.320 (6.60 – 8.13) 0.135 – 0.165 (3.429 – 4.191) LT1764 Series 0.165 – 0.180 0.045 – 0.055 (4.191 – 4.572) (1.143 – 1.397) 15 TYP 0.004 0.059 (1.499) ...
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... LT1764 Series U TYPICAL APPLICATIO + V > 3.7V IN RELATED PARTS PART NUMBER DESCRIPTION LT1120 125mA Low Dropout Regulator with LT1121 150mA Micropower Low Dropout Regulator LT1129 700mA Micropower Low Dropout Regulator LT1175 500mA Negative Low Dropout Micropower Regulator LT1374 4.5A, 500kHz Step-Down Converter LT1521 ...