Datasheet LTC4012-3 (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control |
| Seiten / Seite | 28 / 9 — BGATE (Pin 16):. TGATE (Pin 19):. BOOST (Pin 20):. INTVDD (Pin 17):. GND … |
| Dateiformat / Größe | PDF / 383 Kb |
| Dokumentensprache | Englisch |
BGATE (Pin 16):. TGATE (Pin 19):. BOOST (Pin 20):. INTVDD (Pin 17):. GND (Exposed Pad Pin 21):. SW (Pin 18):
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LTC4012-3 pin FuncTions
BGATE (Pin 16):
External Synchronous NFET Gate Control
TGATE (Pin 19):
External NFET Switch Gate Control Output. Output. This output provides gate drive to an external NMOS This output provides gate drive to an external NMOS power power transistor switch used for synchronous rectification transistor switch used in the DC/DC converter. Operating to increase efficiency in the step-down DC/DC converter. voltage range is GND to (CLN + 5V). Operating voltage is GND to INTVDD. BGATE should be
BOOST (Pin 20):
TGATE Driver Supply Input. A bootstrap left floating if not used. capacitor is returned to this pin from a charge network
INTVDD (Pin 17):
Internal 5V Regulator Output. This pin connected to SW and INTVDD. Refer to the Applications provides a means of bypassing the internal 5V regulator Information section for complete details on circuit topol- used to power the LTC4012-3 PWM FET drivers. This sup- ogy and component values. Operating voltage ranges from ply shuts down when the LTC4012-3 shuts down. Refer to (INTVDD – 1V) to (CLN + 5V). the Application Information section for details if additional
GND (Exposed Pad Pin 21):
Ground. The package paddle power is drawn from this pin by the application circuit. provides a single-point ground for the internal voltage
SW (Pin 18):
PWM Switch Node. The LTC4012-3 uses the reference and other critical LTC4012-3 circuits. It should be voltage on this pin as the source reference for its topside soldered to a suitable PCB copper ground pad for proper NFET (PWM switch) driver. Refer to the Applications In- electrical operation and to obtain the specified package formation section for additional PCB layout suggestions thermal resistance. related to this critical circuit node. Operating voltage range is GND to CLN. 40123fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Operation Applications Information Package Description Revision History Typical Application Related Parts
BGATE (Pin 16):
External Synchronous NFET Gate Control
TGATE (Pin 19):
External NFET Switch Gate Control Output. Output. This output provides gate drive to an external NMOS This output provides gate drive to an external NMOS power power transistor switch used for synchronous rectification transistor switch used in the DC/DC converter. Operating to increase efficiency in the step-down DC/DC converter. voltage range is GND to (CLN + 5V). Operating voltage is GND to INTVDD. BGATE should be
BOOST (Pin 20):
TGATE Driver Supply Input. A bootstrap left floating if not used. capacitor is returned to this pin from a charge network
INTVDD (Pin 17):
Internal 5V Regulator Output. This pin connected to SW and INTVDD. Refer to the Applications provides a means of bypassing the internal 5V regulator Information section for complete details on circuit topol- used to power the LTC4012-3 PWM FET drivers. This sup- ogy and component values. Operating voltage ranges from ply shuts down when the LTC4012-3 shuts down. Refer to (INTVDD – 1V) to (CLN + 5V). the Application Information section for details if additional
GND (Exposed Pad Pin 21):
Ground. The package paddle power is drawn from this pin by the application circuit. provides a single-point ground for the internal voltage
SW (Pin 18):
PWM Switch Node. The LTC4012-3 uses the reference and other critical LTC4012-3 circuits. It should be voltage on this pin as the source reference for its topside soldered to a suitable PCB copper ground pad for proper NFET (PWM switch) driver. Refer to the Applications In- electrical operation and to obtain the specified package formation section for additional PCB layout suggestions thermal resistance. related to this critical circuit node. Operating voltage range is GND to CLN. 40123fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Operation Applications Information Package Description Revision History Typical Application Related Parts