Datasheet LTC3544B (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA |
| Seiten / Seite | 18 / 7 — VFB200B (Pin 1):. RUN300 (Pin 9):. VFB200A (Pin 2):. VFB300 (Pin 10):. … |
| Dateiformat / Größe | PDF / 300 Kb |
| Dokumentensprache | Englisch |
VFB200B (Pin 1):. RUN300 (Pin 9):. VFB200A (Pin 2):. VFB300 (Pin 10):. RUN200A (Pin 3):. VFB100 (Pin 11):. SW200B (Pin 4):
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LTC3544B pin FuncTions
VFB200B (Pin 1):
200mA Regulator B Feedback Pin. This
RUN300 (Pin 9):
300mA Regulator Enable Pin. Forcing pin receives the feedback voltage from an external resistive this pin to VIN enables the 300mA regulator, while forcing divider across the output. it to GND causes the regulator to shut off.
VFB200A (Pin 2):
200mA Regulator A Feedback Pin. This
VFB300 (Pin 10):
300mA Regulator Feedback Pin. This pin pin receives the feedback voltage from an external resistive receives the feedback voltage from an external resistive divider across the output. divider across the output.
RUN200A (Pin 3):
200mA Regulator A Enable Pin. Forcing
VFB100 (Pin 11):
100mA Regulator Feedback Pin. This pin this pin to VIN enables the 200mA regulator (channel A), receives the feedback voltage from an external resistive while forcing it to GND causes the regulator to shut off. divider across the output.
SW200B (Pin 4):
Switch Node Connection to Inductor for
RUN100 (Pin 12):
100mA Regulator Enable Pin. Forcing 200mA Regulator B. This pin connects to the drains of the this pin to VIN enables the 100mA regulator, while forcing internal power MOSFET switches. it to GND causes the 100mA regulator to shut off.
SW200A (Pin 5):
Switch node Connection to Inductor for
SW100 (Pin 13):
Switch Node Connection to Inductor for 200mA Regulator A. This pin connects to the drains of the 100mA Regulator. This pin connects to the drains of the internal power MOSFET switches. internal power MOSFET switches.
PGND (Pin 6):
Power Path Return Pin for Both 200mA
GNDA (Pin 14, Exposed Pad Pin 17):
Ground Pin for In- Regulators and the 300mA Regulator. ternal Reference, Control Circuitry, and the Current Path
PV
Return for 100mA Regulator. The exposed pad must be
IN (Pin 7):
Power Path Supply Pin for Both 200mA Regulators and the 300mA Regulator. This pin must soldered to PCB ground for electrical connection and rated be closely decoupled to PGND, with a 4.7µF or greater thermal performance. ceramic capacitor.
VCC (Pin 15):
Supply Pin for Internal Reference and Control
SW300 (Pin 8):
Switch Node Connection to Inductor for Circuitry. Power path supply pin for the 100mA regulator. 300mA Regulator. This pin connects to the drains of the
RUN200B (Pin 16):
200mA Regulator B Enable Pin. Forcing internal power MOSFET switches. this pin to VIN enables the 200mA regulator (channel B), while forcing it to GND causes the regulator to shut off. 3544bfb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Applications Information Package Description Revision History Related Parts
VFB200B (Pin 1):
200mA Regulator B Feedback Pin. This
RUN300 (Pin 9):
300mA Regulator Enable Pin. Forcing pin receives the feedback voltage from an external resistive this pin to VIN enables the 300mA regulator, while forcing divider across the output. it to GND causes the regulator to shut off.
VFB200A (Pin 2):
200mA Regulator A Feedback Pin. This
VFB300 (Pin 10):
300mA Regulator Feedback Pin. This pin pin receives the feedback voltage from an external resistive receives the feedback voltage from an external resistive divider across the output. divider across the output.
RUN200A (Pin 3):
200mA Regulator A Enable Pin. Forcing
VFB100 (Pin 11):
100mA Regulator Feedback Pin. This pin this pin to VIN enables the 200mA regulator (channel A), receives the feedback voltage from an external resistive while forcing it to GND causes the regulator to shut off. divider across the output.
SW200B (Pin 4):
Switch Node Connection to Inductor for
RUN100 (Pin 12):
100mA Regulator Enable Pin. Forcing 200mA Regulator B. This pin connects to the drains of the this pin to VIN enables the 100mA regulator, while forcing internal power MOSFET switches. it to GND causes the 100mA regulator to shut off.
SW200A (Pin 5):
Switch node Connection to Inductor for
SW100 (Pin 13):
Switch Node Connection to Inductor for 200mA Regulator A. This pin connects to the drains of the 100mA Regulator. This pin connects to the drains of the internal power MOSFET switches. internal power MOSFET switches.
PGND (Pin 6):
Power Path Return Pin for Both 200mA
GNDA (Pin 14, Exposed Pad Pin 17):
Ground Pin for In- Regulators and the 300mA Regulator. ternal Reference, Control Circuitry, and the Current Path
PV
Return for 100mA Regulator. The exposed pad must be
IN (Pin 7):
Power Path Supply Pin for Both 200mA Regulators and the 300mA Regulator. This pin must soldered to PCB ground for electrical connection and rated be closely decoupled to PGND, with a 4.7µF or greater thermal performance. ceramic capacitor.
VCC (Pin 15):
Supply Pin for Internal Reference and Control
SW300 (Pin 8):
Switch Node Connection to Inductor for Circuitry. Power path supply pin for the 100mA regulator. 300mA Regulator. This pin connects to the drains of the
RUN200B (Pin 16):
200mA Regulator B Enable Pin. Forcing internal power MOSFET switches. this pin to VIN enables the 200mA regulator (channel B), while forcing it to GND causes the regulator to shut off. 3544bfb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Applications Information Package Description Revision History Related Parts