LT3021 LINER [Linear Technology], LT3021 Datasheet
LT3021
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LT3021 Summary of contents
Page 1
... This device supplies 500mA of output current with a = 200mV) typical dropout voltage of 160mV. The LT3021 is ideal for low input voltage to low output voltage applications, providing comparable electrical efficiency to that of a switching regulator. ...
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... THE APPLICATIONS INFORMATION SECTION **MEASURED JUNCTION TO PIN 6 ORDER PART DH PART NUMBER MARKING LT3021EDH 3021 ORDER PART DH PART NUMBER MARKING LT3021EDH-1.2 302112 LT3021EDH-1.5 302115 LT3021EDH-1.8 302118 ORDER PART S8 PART NUMBER MARKING 3021 LT3021ES8 ORDER PART S8 PART NUMBER MARKING LT3021ES8-1.2 302112 LT3021ES8-1.5 302115 LT3021ES8-1 ...
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... Off to On OUT Off OUT SHDN Pin Current (Note 10 0V, V SHDN V = 10V, V SHDN Quiescent Current in Shutdown Ripple Rejection (Note 6) LT3021 LT3021-1.2 LT3021-1.5 LT3021-1.8 > 0°C J < 0° 1mA LOAD < 10V, 1mA < I < 500mA IN LOAD V = 1.5V 1mA IN LOAD 1.5V < ...
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... This current flows into the OUT pin and out of the GND pin. For fixed voltage devices this includes the current in the output resistor divider. Note 12: The LT3021 is tested and specified for these conditions with an external resistor divider (20k and 100k) setting V resistor divider adds 10µA of load current. ...
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... OUT 25°C 2.5 J 2.0 1 SHDN IN 1 SHDN 0 INPUT VOLTAGE (V) LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 Quiescent Current 250 1.2V 225 OUT 200 175 150 V SHDN 125 100 SHDN 0 100 125 –50 – TEMPERATURE (°C) ...
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... LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1 TYPICAL PERFOR A CE CHARACTERISTICS GND Pin Current 1.2V OUT R = 2.4Ω 25° 500mA 4.8Ω 250mA 24Ω 50mA R = 120Ω 10mA 12Ω 100mA 1.2k 1mA ...
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... Transient Response V OUT 50mV/DIV I OUT 500mA/DIV I = 50mA TO 500mA OUT 100 V = 1.2V OUT C = 22µF OUT 3021 G19 LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 Load Regulation ∆I = 1mA to 500mA L 2.5 2.0 1.5 1.0 0.5 0 –0.5 –1 1.15V 0.5V –1.5 OUT *LOAD REGULATION NUMBER REFERS –2.0 TO CHANGE IN THE 200mV REFERENCE VOLTAGE – ...
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... IN pin with respect to ground and the OUT pin. In the case of a reversed input, which occurs if a battery is plugged in backwards, the LT3021 acts diode is in series with its input. No reverse current flows into the LT3021 and no reverse voltage appears at the load. The device protects itself and the load ...
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... The device protects itself against reverse-input and reverse-output voltages. In battery backup applications where the output is held backup battery when the input is pulled to ground, the LT3021 acts diode is in series with its output which prevents reverse current flow. In dual supply applications where the regulator load ...
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... However, if the external circuitry pulls the output voltage above the input voltage, or the input falls below the output, the LT3021 turns the current sink off and shuts down the bias current/reference generator circuitry. Thermal Considerations The LT3021’ ...
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... PCB. Con- nect this metal to GND on the PCB. The multiple IN and OUT pins of the LT3021 also assist in spreading heat to the PCB. The LT3021 S8 package has pin 4 fused with the lead frame. This also allows heat to transfer from the die to the printed circuit board metal, therefore reducing the thermal resistance ...
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... In the case where the input is grounded, there is less than 1µA of reverse output current. If the LT3021 IN pin is forced below the OUT pin or the OUT pin is pulled above the IN pin, input current drops to less than 10µA typically. This occurs if the LT3021 input is ...
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... LT3021. Furthermore, series resistance may be placed between the supply and the input of the LT3021 to stabilize the appli- cation; as little as 0.1Ω to 0.5Ω will suffice. LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 ...
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... LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 PACKAGE DESCRIPTIO 5.50 ±0.05 4.10 ±0.05 3.45 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJJD-1) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4 ...
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... TYP .016 – .050 .014 – .019 (0.406 – 1.270) (0.355 – 0.483) TYP INCHES (MILLIMETERS) LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 .189 – .197 (4.801 – 5.004) NOTE .150 – .157 (3.810 – 3.988) NOTE 3 ...
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... LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 RELATED PARTS PART NUMBER DESCRIPTION LT1121/LT1121HV 150mA, Micropower LDOs LT1129 700mA, Micropower LDO LT1761 100mA, Low Noise Micropower LDO LT1762 150mA, Low Noise Micropower LDO LT1763 500mA, Low Noise Micropower LDO LT1764/LT1764A 3A, Low Noise, Fast Transient Response LDOs ...