Datasheet LT3022, LT3022-1.2, LT3022-1.5, LT3022-1.8 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | 1A, 0.9V to 10V, Very Low Dropout Linear Regulator |
| Seiten / Seite | 20 / 10 — PIN FUNCTIONS. NC (Pins 1, 2, 8, 15, 16):. PGND (Pins 10, 11):. OUT (Pins … |
| Dateiformat / Größe | PDF / 581 Kb |
| Dokumentensprache | Englisch |
PIN FUNCTIONS. NC (Pins 1, 2, 8, 15, 16):. PGND (Pins 10, 11):. OUT (Pins 3, 4):. IN (Pins 12, 13,14):
Modelllinie für dieses Datenblatt
- LT3022EDHC#PBF LT3022EDHC#PBF LT3022EDHC#TRPBF LT3022EDHC#TRPBF LT3022EMSE#PBF LT3022EMSE#PBF LT3022EMSE#TRPBF LT3022EMSE#TRPBF LT3022EMSE-1.2#PBF LT3022EMSE-1.2#PBF LT3022EMSE-1.2#TRPBF LT3022EMSE-1.2#TRPBF LT3022EMSE-1.5#PBF LT3022EMSE-1.5#PBF LT3022EMSE-1.5#TRPBF LT3022EMSE-1.5#TRPBF LT3022EMSE-1.8#PBF LT3022EMSE-1.8#PBF LT3022EMSE-1.8#TRPBF LT3022EMSE-1.8#TRPBF LT3022IDHC#PBF LT3022IDHC#PBF LT3022IDHC#TRPBF LT3022IDHC#TRPBF LT3022IMSE#PBF LT3022IMSE#PBF LT3022IMSE#TRPBF LT3022IMSE#TRPBF LT3022IMSE-1.2#PBF LT3022IMSE-1.2#PBF LT3022IMSE-1.2#TRPBF LT3022IMSE-1.2#TRPBF LT3022IMSE-1.5#PBF LT3022IMSE-1.5#PBF LT3022IMSE-1.5#TRPBF LT3022IMSE-1.5#TRPBF LT3022IMSE-1.8#PBF LT3022IMSE-1.8#PBF LT3022IMSE-1.8#TRPBF LT3022IMSE-1.8#TRPBF
Textversion des Dokuments
LT3022/LT3022-1.2 LT3022-1.5/LT3022-1.8
PIN FUNCTIONS NC (Pins 1, 2, 8, 15, 16):
No Connect Pins. These pins
PGND (Pins 10, 11):
Power Ground. The majority of have no connection to internal circuitry. These pins may ground pin current flows out of PGND. Tie these pins be floated, tied to VIN or tied to GND for improved thermal directly to AGND (Pins 6, 7) and the exposed backside performance. GND (Pin 17).
OUT (Pins 3, 4):
These pins supply power to the load.
IN (Pins 12, 13,14):
These pins supply power to the device. Use a minimum output capacitor of 10µF to prevent The LT3022 requires a bypass capacitor at IN if located oscillations. Large load transient applications require larger more than six inches from the main input filter capacitor. output capacitors to limit peak voltage transients. See the Include a bypass capacitor in battery-powered circuits Applications Information section for more information on as a battery’s output impedance rises with frequency. A output capacitance and reverse-output characteristics. The minimum bypass capacitor of 10µF suffices. The LT3022 LT3022 requires a 1mA minimum load current to ensure withstands reverse voltages on the IN pin with respect to proper regulation and stability. ground and the OUT pin. In the case of a reversed input,
SENSE (Pin 5, Fixed Voltage Device Only):
This pin is which occurs if a battery is plugged in backwards, the the sense point for the internal resistor divider. It should LT3022 behaves as if a diode is in series with its input. be tied directly to the OUT pins for best results. No reverse current flows into the LT3022 and no reverse voltage appears at the load. The device protects itself and
ADJ (Pin 5):
This pin is the error amplifier inverting the load. terminal. Its 30nA typical input bias current flows out of the pin (see curve of ADJ Pin Bias Current vs Temperature
GND (Pin 17):
Exposed Pad. Tie this pin directly to AGND in the Typical Performance Characteristics). The ADJ pin (Pins 6, 7), PGND (Pins 10, 11) and the PCB ground. reference voltage is 200mV (referred to AGND). This pin provides enhanced thermal performance with its connection to the PCB ground. See the Applications
AGND (Pins 6, 7):
Analog Ground. Tie these pins directly Information section for thermal considerations and to PGND (Pins 10, 11) and the exposed backside GND calculating junction temperature. (Pin 17). Connect the bottom of the external resistor divider, setting output voltage, directly to AGND for optimum regulation.
SHDN (Pin 9):
Pulling the SHDN pin low puts the LT3022 into a low power state and turns the output off. Drive the SHDN pin with either logic or an open-collector/drain device with a pull-up resistor. The resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the SHDN pin current, typically 3µA. If unused, connect the SHDN pin to VIN. The LT3022 does not function if the SHDN pin is not connected. 3022fb 10 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts
PIN FUNCTIONS NC (Pins 1, 2, 8, 15, 16):
No Connect Pins. These pins
PGND (Pins 10, 11):
Power Ground. The majority of have no connection to internal circuitry. These pins may ground pin current flows out of PGND. Tie these pins be floated, tied to VIN or tied to GND for improved thermal directly to AGND (Pins 6, 7) and the exposed backside performance. GND (Pin 17).
OUT (Pins 3, 4):
These pins supply power to the load.
IN (Pins 12, 13,14):
These pins supply power to the device. Use a minimum output capacitor of 10µF to prevent The LT3022 requires a bypass capacitor at IN if located oscillations. Large load transient applications require larger more than six inches from the main input filter capacitor. output capacitors to limit peak voltage transients. See the Include a bypass capacitor in battery-powered circuits Applications Information section for more information on as a battery’s output impedance rises with frequency. A output capacitance and reverse-output characteristics. The minimum bypass capacitor of 10µF suffices. The LT3022 LT3022 requires a 1mA minimum load current to ensure withstands reverse voltages on the IN pin with respect to proper regulation and stability. ground and the OUT pin. In the case of a reversed input,
SENSE (Pin 5, Fixed Voltage Device Only):
This pin is which occurs if a battery is plugged in backwards, the the sense point for the internal resistor divider. It should LT3022 behaves as if a diode is in series with its input. be tied directly to the OUT pins for best results. No reverse current flows into the LT3022 and no reverse voltage appears at the load. The device protects itself and
ADJ (Pin 5):
This pin is the error amplifier inverting the load. terminal. Its 30nA typical input bias current flows out of the pin (see curve of ADJ Pin Bias Current vs Temperature
GND (Pin 17):
Exposed Pad. Tie this pin directly to AGND in the Typical Performance Characteristics). The ADJ pin (Pins 6, 7), PGND (Pins 10, 11) and the PCB ground. reference voltage is 200mV (referred to AGND). This pin provides enhanced thermal performance with its connection to the PCB ground. See the Applications
AGND (Pins 6, 7):
Analog Ground. Tie these pins directly Information section for thermal considerations and to PGND (Pins 10, 11) and the exposed backside GND calculating junction temperature. (Pin 17). Connect the bottom of the external resistor divider, setting output voltage, directly to AGND for optimum regulation.
SHDN (Pin 9):
Pulling the SHDN pin low puts the LT3022 into a low power state and turns the output off. Drive the SHDN pin with either logic or an open-collector/drain device with a pull-up resistor. The resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the SHDN pin current, typically 3µA. If unused, connect the SHDN pin to VIN. The LT3022 does not function if the SHDN pin is not connected. 3022fb 10 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts