Datasheet LT3020, LT3020-1.2, LT3020-1.5, LT3020-1.8 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | 100mA, Low Voltage, Very Low Dropout Linear Regulator |
| Seiten / Seite | 16 / 8 — TYPICAL PERFOR A CE CHARACTERISTICS. RMS Output Noise vs Load Current … |
| Dateiformat / Größe | PDF / 221 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. RMS Output Noise vs Load Current (10Hz to 100kHz). No-Load Recovery Threshold
Modelllinie für dieses Datenblatt
- LT3020EDD#PBF LT3020EDD#PBF LT3020EDD#TRPBF LT3020EDD#TRPBF LT3020EDD-1.2#PBF LT3020EDD-1.2#PBF LT3020EDD-1.2#TRPBF LT3020EDD-1.2#TRPBF LT3020EDD-1.5#PBF LT3020EDD-1.5#PBF LT3020EDD-1.5#TRPBF LT3020EDD-1.5#TRPBF LT3020EDD-1.8#PBF LT3020EDD-1.8#PBF LT3020EDD-1.8#TRPBF LT3020EDD-1.8#TRPBF LT3020EMS8#PBF LT3020EMS8#PBF LT3020EMS8#TRPBF LT3020EMS8#TRPBF LT3020EMS8-1.2#PBF LT3020EMS8-1.2#PBF LT3020EMS8-1.2#TRPBF LT3020EMS8-1.2#TRPBF LT3020EMS8-1.5#PBF LT3020EMS8-1.5#PBF LT3020EMS8-1.5#TRPBF LT3020EMS8-1.5#TRPBF LT3020EMS8-1.8#PBF LT3020EMS8-1.8#PBF LT3020EMS8-1.8#TRPBF LT3020EMS8-1.8#TRPBF LT3020IDD#PBF LT3020IDD#PBF LT3020IDD#TRPBF LT3020IDD#TRPBF LT3020IDD-1.2#PBF LT3020IDD-1.2#PBF LT3020IDD-1.2#TRPBF LT3020IDD-1.2#TRPBF LT3020IDD-1.5#PBF LT3020IDD-1.5#PBF LT3020IDD-1.5#TRPBF LT3020IDD-1.5#TRPBF LT3020IDD-1.8#PBF LT3020IDD-1.8#PBF LT3020IDD-1.8#TRPBF LT3020IDD-1.8#TRPBF LT3020IMS8#PBF LT3020IMS8#PBF LT3020IMS8#TRPBF LT3020IMS8#TRPBF LT3020IMS8-1.2#PBF LT3020IMS8-1.2#PBF LT3020IMS8-1.2#TRPBF LT3020IMS8-1.2#TRPBF LT3020IMS8-1.5#PBF LT3020IMS8-1.5#PBF LT3020IMS8-1.5#TRPBF LT3020IMS8-1.5#TRPBF LT3020IMS8-1.8#PBF LT3020IMS8-1.8#PBF LT3020IMS8-1.8#TRPBF LT3020IMS8-1.8#TRPBF
Textversion des Dokuments
LT3020/LT3020-1.2/ LT3020-1.5/LT3020-1.8
W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Output Noise vs Load Current (10Hz to 100kHz) No-Load Recovery Threshold
300 18 VOUT = 1.2V COUT = 2.2µF 16 250 ) 14 RMS 200 12 µV 10 150 8 100 6 OUTPUT NOISE ( OUTPUT CURRENT SINK (mA) 4 50 2 0 0 0.01 0.1 1 10 100 0 5 10 15 20 LOAD CURRENT (mA) OUTPUT OVERSHOOT (%) 3020 G20 3020 G19
U U U PI FU CTIO S OUT (Pins 1, 2):
These pins supply power to the load. Use supplies the pull-up current to the open collector/drain a minimum output capacitor of 2.2µF to prevent oscillations. logic, normally several microamperes, and the SHDN pin Applications with large load transients require larger out- current, typically 2.3µA. If unused, connect the SHDN pin put capacitors to limit peak voltage transients. See the to VIN. The LT3020 does not function if the SHDN pin is not Applications Information section for more information on connected. output capacitance and reverse output characteristics.
IN (Pins 7, 8):
These pins supply power to the device. The
OUT (Pin 3, Fixed Voltage Device Only):
This pin is the LT3020 requires a bypass capacitor at IN if it is more than sense point for the internal resistor divider. It should be six inches away from the main input filter capacitor. The tied directly to the other OUT pins (1, 2) for best results. output impedance of a battery rises with frequency, so include a bypass capacitor in battery-powered circuits. A
ADJ (Pin 3, Adjustable Device Only):
This pin is the bypass capacitor in the range of 2.2µF to 10µF suffices. The inverting terminal to the error amplifier. Its typical input LT3020 withstands reverse voltages on the IN pin with bias current of 20nA flows out of the pin (see curve of ADJ respect to ground and the OUT pin. In the case of a reversed Pin Bias Current vs Temperature in the Typical Perfor- input, which occurs if a battery is plugged in backwards, mance Characteristics). The ADJ pin reference voltage is the LT3020 acts as if a diode is in series with its input. No 200mV (referred to GND). reverse current flows into the LT3020 and no reverse volt-
GND (Pin 4):
Ground. age appears at the load. The device protects itself and the
SHDN (Pin 5):
The SHDN pin puts the LT3020 into a low load. power state. Pulling the SHDN pin low turns the output off.
GND (Pin 9, DD8 Package Only):
Ground. Solder Pin 9 Drive the SHDN pin with either logic or an open collector/ (the exposed pad) to the PCB. Connect directly to Pin 4 for drain device with a pull-up resistor. The pull-up resistor best performance. 3020fc 8
W U TYPICAL PERFOR A CE CHARACTERISTICS RMS Output Noise vs Load Current (10Hz to 100kHz) No-Load Recovery Threshold
300 18 VOUT = 1.2V COUT = 2.2µF 16 250 ) 14 RMS 200 12 µV 10 150 8 100 6 OUTPUT NOISE ( OUTPUT CURRENT SINK (mA) 4 50 2 0 0 0.01 0.1 1 10 100 0 5 10 15 20 LOAD CURRENT (mA) OUTPUT OVERSHOOT (%) 3020 G20 3020 G19
U U U PI FU CTIO S OUT (Pins 1, 2):
These pins supply power to the load. Use supplies the pull-up current to the open collector/drain a minimum output capacitor of 2.2µF to prevent oscillations. logic, normally several microamperes, and the SHDN pin Applications with large load transients require larger out- current, typically 2.3µA. If unused, connect the SHDN pin put capacitors to limit peak voltage transients. See the to VIN. The LT3020 does not function if the SHDN pin is not Applications Information section for more information on connected. output capacitance and reverse output characteristics.
IN (Pins 7, 8):
These pins supply power to the device. The
OUT (Pin 3, Fixed Voltage Device Only):
This pin is the LT3020 requires a bypass capacitor at IN if it is more than sense point for the internal resistor divider. It should be six inches away from the main input filter capacitor. The tied directly to the other OUT pins (1, 2) for best results. output impedance of a battery rises with frequency, so include a bypass capacitor in battery-powered circuits. A
ADJ (Pin 3, Adjustable Device Only):
This pin is the bypass capacitor in the range of 2.2µF to 10µF suffices. The inverting terminal to the error amplifier. Its typical input LT3020 withstands reverse voltages on the IN pin with bias current of 20nA flows out of the pin (see curve of ADJ respect to ground and the OUT pin. In the case of a reversed Pin Bias Current vs Temperature in the Typical Perfor- input, which occurs if a battery is plugged in backwards, mance Characteristics). The ADJ pin reference voltage is the LT3020 acts as if a diode is in series with its input. No 200mV (referred to GND). reverse current flows into the LT3020 and no reverse volt-
GND (Pin 4):
Ground. age appears at the load. The device protects itself and the
SHDN (Pin 5):
The SHDN pin puts the LT3020 into a low load. power state. Pulling the SHDN pin low turns the output off.
GND (Pin 9, DD8 Package Only):
Ground. Solder Pin 9 Drive the SHDN pin with either logic or an open collector/ (the exposed pad) to the PCB. Connect directly to Pin 4 for drain device with a pull-up resistor. The pull-up resistor best performance. 3020fc 8