Datasheet LTC3833 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing |
| Pages / Page | 36 / 9 — PIN FUNCTIONS VIN (Pin 14/Pin 10):. SW (Pin 18/Pin 14):. TG (Pin 19/Pin … |
| File Format / Size | PDF / 530 Kb |
| Document Language | English |
PIN FUNCTIONS VIN (Pin 14/Pin 10):. SW (Pin 18/Pin 14):. TG (Pin 19/Pin 15):. INTVCC (Pin 15/Pin 11):. BOOST (Pin 20/Pin 16):
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Text Version of Document
LTC3833
PIN FUNCTIONS VIN (Pin 14/Pin 10):
Main Supply Input. The supply voltage
SW (Pin 18/Pin 14):
Switch Node Connection. The (–) can range from 4.5V to 38V. For increased noise immunity terminal of the bootstrap capacitor, CB, connects to this decouple this pin to signal ground with an RC filter. The node. This pin swings from a diode voltage below ground voltage on this pin is also used to adjust the TG on-time up to VIN. in order to maintain constant frequency operation.
TG (Pin 19/Pin 15):
Top Gate Drive Output. This pin drives
INTVCC (Pin 15/Pin 11):
Internal 5.3V Regulator Output. the gate of the top N-Channel power MOSFET between The driver and control circuits are powered from this volt- VSW and VBOOST . age. Decouple this pin to power ground with a minimum of
BOOST (Pin 20/Pin 16):
Boosted Driver Supply Connec- 4.7μF ceramic capacitor (CVCC). The anode of the Schottky tion. The (+) terminal of the bootstrap capacitor, C diode, D B, as B, connects to this pin. well as the cathode of the Schottky diode, DB, connects
PGND (Pin 16/Pin 12):
Power Ground Connection. Connect to this node. This node swings from INTVCC – VSCHOTTKY this pin as close as practical to the source of the bottom to VIN + INTVCC – VSCHOTTKY. N-channel power MOSFET, the (–) terminal of CVCC and
SGND (Exposed Pad Pin 21/Exposed Pad Pin 21):
Signal the (–) terminal of CIN. Ground Connection. The SGND exposed pad must be
BG (Pin 17/Pin 13):
Bottom Gate Drive Output. This pin soldered to the circuit board for electrical contact and drives the gate of the bottom N-channel power MOSFET rated thermal performance. All small-signal components between INTVCC and power ground. should be connected to the signal ground. Connect signal ground to power ground only at one point using a single PCB trace. 3833f 9
PIN FUNCTIONS VIN (Pin 14/Pin 10):
Main Supply Input. The supply voltage
SW (Pin 18/Pin 14):
Switch Node Connection. The (–) can range from 4.5V to 38V. For increased noise immunity terminal of the bootstrap capacitor, CB, connects to this decouple this pin to signal ground with an RC filter. The node. This pin swings from a diode voltage below ground voltage on this pin is also used to adjust the TG on-time up to VIN. in order to maintain constant frequency operation.
TG (Pin 19/Pin 15):
Top Gate Drive Output. This pin drives
INTVCC (Pin 15/Pin 11):
Internal 5.3V Regulator Output. the gate of the top N-Channel power MOSFET between The driver and control circuits are powered from this volt- VSW and VBOOST . age. Decouple this pin to power ground with a minimum of
BOOST (Pin 20/Pin 16):
Boosted Driver Supply Connec- 4.7μF ceramic capacitor (CVCC). The anode of the Schottky tion. The (+) terminal of the bootstrap capacitor, C diode, D B, as B, connects to this pin. well as the cathode of the Schottky diode, DB, connects
PGND (Pin 16/Pin 12):
Power Ground Connection. Connect to this node. This node swings from INTVCC – VSCHOTTKY this pin as close as practical to the source of the bottom to VIN + INTVCC – VSCHOTTKY. N-channel power MOSFET, the (–) terminal of CVCC and
SGND (Exposed Pad Pin 21/Exposed Pad Pin 21):
Signal the (–) terminal of CIN. Ground Connection. The SGND exposed pad must be
BG (Pin 17/Pin 13):
Bottom Gate Drive Output. This pin soldered to the circuit board for electrical contact and drives the gate of the bottom N-channel power MOSFET rated thermal performance. All small-signal components between INTVCC and power ground. should be connected to the signal ground. Connect signal ground to power ground only at one point using a single PCB trace. 3833f 9
