LT1963A-1.5 LINER [Linear Technology], LT1963A-1.5 Datasheet
LT1963A-1.5
Related parts for LT1963A-1.5
LT1963A-1.5 Summary of contents
Page 1
... In addition to fast transient response, the LT1963A regulators have very low output noise which makes them ideal for sensitive RF supply applications. Output voltage range is from 1.21V to 20V. The LT1963A regulators are stable with output capacitors as low as 10mF. Small ceramic capacitors can be used without the necessary addition of ESR as is common with other regulators ...
Page 2
... Lead Temperature (Soldering, 10 sec).................. 300∞ ORDER PART FRONT VIEW NUMBER LT1963AEQ LT1963AEQ-1.5 LT1963AEQ-1.8 TAB IS T PACKAGE LT1963AEQ-2.5 GND 5-LEAD PLASTIC TO-220 LT1963AEQ-3.3 *PIN 5 = SENSE FOR LT1963A-1.8/LT1963A-2.5/LT1963A-3.3 = ADJ FOR LT1963A = 150∞ JMAX ORDER PART NUMBER LT1963AEST-1.5 LT1963AEST-1.8 OUT 1 LT1963AEST-2.5 SENSE/ADJ* 2 GND 3 LT1963AEST-3 ...
Page 3
... Regulated Output Voltage (Note 5) LT1963A-1.5 LT1963A-1.8 LT1963A-2.5 LT1963A-3.3 ADJ Pin Voltage LT1963A (Notes 4, 5) Line Regulation LT1963A-1.5 LT1963A-1.8 LT1963A-2.5 LT1963A-3.3 LT1963A (Note 4) DV Load Regulation LT1963A-1.5 LT1963A-1.8 LT1963A-2.5 LT1963A-3.3 LT1963A (Note 4) V Dropout Voltage I LOAD OUT(NOMINAL) LOAD (Notes 6, 7, 12) ...
Page 4
... Note 11: 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 12. For the LT1963A, LT1963A-1.5 and LT1963A-1.8 dropout voltage will be limited by the minimum input voltage specification under some output voltage/load conditions. ...
Page 5
... TEMPERATURE (°C) 1963 G06 LT1963A-1.5 Quiescent Current 25° ∞ SHDN INPUT VOLTAGE (V) 1963 G41 LT1963A-1.5 Output Voltage 1. 1mA L 1.53 1.52 1.51 1.50 1.49 1.48 1.47 1.46 – 50 – TEMPERATURE (°C) LT1963A-3.3 Output Voltage 3. 1mA L 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 –50 – ...
Page 6
... 1. 500mA INPUT VOLTAGE (V) LT1963A-1.5 GND Pin Current 25° SHDN IN *FOR OUT 150 10mA 15 ...
Page 7
... TEMPERATURE (°C) SHDN Pin Input Current 7 V SHDN – –25 0 TEMPERATURE (°C) LT1963A Series LT1963A GND Pin Current 100 SHDN = 3.3V *FOR 0.81 1.5A 1.21 1A 2.42 500mA* ...
Page 8
... 3.5 OUT 3.0 2.5 2.0 1.5 1.0 0.5 0 –50 – 100 125 TEMPERATURE (°C) 1963 G28 Reverse Output Current 1 0 1.21V (LT1963A) OUT V = 1.5V (LT1963A-1.5) OUT 0 1.8V (LT1963A-1.8) OUT V = 2.5V (LT1963A-2.5) 0.7 OUT V = 3.3V (LT1963A-3.3) OUT 0.6 LT1963A-1.8/-2.5/-3.3 0.5 0.4 LT1963A 0.3 0.2 0.1 0 –50 – 100 TEMPERATURE (°C) 1963 G30 LT1963A Minimum Input Voltage 3 ...
Page 9
... W U TYPICAL PERFOR A CE CHARACTERISTICS Load Regulation LT1963A-1.8 – 5 LT1963A-2.5 LT1963A-3.3 – +1V IN OUT(NOMINAL) (LT1963A-1.8/-2.5/-3.3) – 2.7V (LT1963A/LT1963A-1.5) IN ∆I = 1mA TO 1.5A L – –50 – TEMPERATURE (°C) RMS Output Noise vs Load Current (10Hz to 100kHz 10µF OUT 45 40 LT1963A-3.3 35 LT1963A-2 ...
Page 10
... SENSE: Sense. For fixed voltage versions of the LT1963A (LT1963A-1.5/LT1963A-1.8/LT1963A-2.5/LT1963A-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 11
... In battery backup applications where the output can be held backup battery when the input is pulled to ground, the LT1963A-X acts like it has a diode in series with its output and prevents reverse current flow. Additionally, in dual supply applica- ...
Page 12
... Higher values of output voltage noise may be measured when care is not exercised with regards to circuit layout and testing. Crosstalk from nearby traces can induce unwanted noise onto the output of the LT1963A-X. Power supply ripple rejection must also be considered; the LT1963A regulators do not have unlimited power supply rejection and will pass a small portion of the input noise through to the output ...
Page 13
... Current curves in the Typical Performance Characteris- tics. Power dissipation will be equal to the sum of the two components listed above. The LT1963A series regulators have internal thermal limiting designed to protect the device during overload conditions. For continuous normal conditions, the maxi- mum junction temperature rating of 125∞C must not be exceeded ...
Page 14
... The state of the SHDN pin will have no effect on the reverse output current when the output is pulled above the input. 5.0 LT1963A 4 OUT ADJ 4.0 LT1963A-1 OUT FB 3.5 LT1963A-1.8 3 OUT FB LT1963A-2 ...
Page 15
... C1A + 200k 1N4148 1/2 LT1018 – 0.1µF +V C1B 750Ω + 0.033µF 1/2 LT1018 1N4148 – 10k 1µ COILTRONICS CTX500-2- STANCOR P-8559 * = 1% FILM RESISTOR = NTE5437 LT1963A Series LT1963A-3.3 3.3V OUT IN OUT 1.5A + SHDN FB 22µF GND 34k* 12.1k LT1006 10k 10k – +V LT1004 1.2V 1963 TA03 ...
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... LT1963A Series PACKAGE DESCRIPTIO 0.060 0.256 (1.524) (6.502) 0.060 0.183 (1.524) (4.648) 0.075 (1.905) 0.300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK Package 5-Lead Plastic DD Pak (Reference LTC DWG # 05-08-1461) 0.060 0.390 – 0.415 (1.524) (9.906 – ...
Page 17
... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1963A Series 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) ...
Page 18
... LT1963A Series PACKAGE DESCRIPTIO 0.264 – 0.287 (6.70 – 7.30) 0.130 – 0.146 (3.30 – 3.71) 0.0905 (2.30) NOM 0.071 (1.80) MAX Package 3-Lead Plastic SOT-223 (Reference LTC DWG # 05-08-1630) 0.248 – 0.264 (6.30 – 6.71) 0.114 – 0.124 (2.90 – 3.15) 0.033 – 0.041 (0.84 – 1.04) 10° – 16° 10° ...
Page 19
... SEATING PLANE 0.152 – 0.202 (3.861 – 5.131) 0.260 – 0.320 (6.60 – 8.13) LT1963A Series 0.165 – 0.180 (4.191 – 4.572) 0.045 – 0.055 (1.143 – 1.397) 0.620 (15.75) TYP 0.700 – 0.728 (17.78 – ...
Page 20
... LT1963A Series U TYPICAL APPLICATIO S Adjustable Current Source R5 0.01Ω > 2.7V IN 10µF LT1004-1 2.2k 2.2k 80. NOTE: ADJUST R1 FOR 3.3µ 1.5A CONSTANT CURRENT RELATED PARTS PART NUMBER DESCRIPTION LT1120 125mA Low Dropout Regulator with 20mA I LT1121 150mA Micropower Low Dropout Regulator ...