LT1764-1.5 Linear Technology, LT1764-1.5 Datasheet
LT1764-1.5
Related parts for LT1764-1.5
LT1764-1.5 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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... I = 0.5A LOAD (Notes 3, 11 1.5A LOAD I = 2.7A, 110 C < T LOAD I = 3A, – LOAD Regulated Output Voltage LT1764-1.5 V (Note 4) LT1764-1.8 V LT1764-2.5 V LT1764-3.3 V ADJ Pin Voltage LT1764 (Notes RATINGS (Note 1) SHDN Pin Voltage ................................................. 20V Output Short-Circuit Duration ......................... Indefinite Operating Junction Temperature Range – 125 C Storage Temperature Range ................. – ...
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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 ...
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... 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. ...
Page 5
... LT1764-1.8 Output Voltage 1. 1mA L 1.83 1.82 1.81 1.80 1.79 1.78 1.77 1.76 – 100 125 – TEMPERATURE ( C) 1756 G05 LT1764 ADJ Pin Voltage 1.230 I = 1mA L 1.225 1.220 1.215 1.210 1.205 1.200 1.195 1.190 – 100 125 – TEMPERATURE ( C) 1756 G08 LT1764-3.3 Quiescent Current ...
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... 1.5A 0.7A INPUT VOLTAGE (V) 1764 G17 LT1764 GND Pin Current 150 SHDN IN *FOR V = 1.21V OUT 120 1.5A 1. 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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... I = 1mA 2.7V (LT1764) IN – OUT(NOM) (LT1764-1.8/-2.5/-3.3) –30 – 50 – 100 125 TEMPERATURE ( C) 1764 G34 LT1764-3.3 10Hz to 100kHz Output Noise V OUT 100 V/DIV 1ms/DIV OUT 1764 G37 Ripple Rejection 1. OUT(NOM) + 0.5V ...
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... ADJ (Pin 5): Adjust. For the adjustable LT1764, this is the input to the error amplifier. This pin is internally clamped to 7V. It has a bias current which flows into the pin ...
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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... Current flow back into the output will follow the curve shown in Figure 5. When the IN pin of the LT1764-X is forced below the OUT pin or the OUT pin is pulled above the IN pin, input current will typically drop to less than 2 A. This can happen if the ...
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... LT1764 Series U TYPICAL APPLICATIO S SCR Preregulator Provides Efficiency Over Line Variations L2 10V AC AT 115V IN 90V AC TO 140V AC 10V AC AT 115V IN 1N4002 “SYNC” 1N4002 TO + ALL “V ” + POINTS 22 F L1: COILTRONICS CTX500-2-52 L2: STANCOR P-8560 *1% FILM RESISTOR + C1 V > 2. NTE5437 500 H ...
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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 ...