Datasheet LTC3822-1 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | No RSENSE , Low Input Voltage, Synchronous Step-Down DC/DC Controller |
| Pages / Page | 24 / 7 — PIN FUNCTIONS (DD/GN). BG (Pin 8/Pin 11):. SW (Pin 12/Pin 16):. TG (Pin … |
| File Format / Size | PDF / 389 Kb |
| Document Language | English |
PIN FUNCTIONS (DD/GN). BG (Pin 8/Pin 11):. SW (Pin 12/Pin 16):. TG (Pin 9/Pin 12):. Exposed Pad (Pin 13, DD Only):
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Text Version of Document
LTC3822-1
PIN FUNCTIONS (DD/GN) BG (Pin 8/Pin 11):
Bottom Gate Driver Output. This pin
SW (Pin 12/Pin 16):
Switch Node Connection to Inductor. drives the gate of the external bottom-side MOSFET. This This pin is also the negative input to the differential current pin has an output swing from GND to BOOST. comparator(DFN only) and an input to the reverse current comparator. Normally this pin is connected to the source
TG (Pin 9/Pin 12):
Top Gate Driver Output. This pin drives of the external topside MOSFET, the drain of the external the gate of the external topside MOSFET. This pin has an bottom-side MOSFET, and the inductor. output swing from GND to BOOST.
Exposed Pad (Pin 13, DD Only):
Ground. The Exposed
BOOST (Pin 10/Pin 13):
Positive Supply Pin for the Gate Pad is ground and must be soldered to the PCB ground Driver Circuitry. A bootstrapped capacitor, charged with for electrical contact and optimal thermal performance. an external Schottky diode and a boost voltage source, is connected between the BOOST and SW pins. Voltage swing
GND (Pins 1, 9 GN Only):
Ground. at the BOOST pin is from boost source voltage (typically
PGOOD (Pin 4, GN Only):
Power Good Output Voltage VIN) to this boost source voltage + VIN. Monitor Open-Drain Logic Output. This pin is pulled to
VIN (Pin 11/Pin 14):
This pin powers the control circuitry ground when the voltage on the feedback pin VFB is not and serves as the positive input to the differential current within ±13.3% of its nominal set point. comparator.
SENSE– (Pin 15, GN Only):
Negative Input to the Differential Current Comparator. Normally this pin is connected to the source of the external topside MOSFET. 38221f 7
PIN FUNCTIONS (DD/GN) BG (Pin 8/Pin 11):
Bottom Gate Driver Output. This pin
SW (Pin 12/Pin 16):
Switch Node Connection to Inductor. drives the gate of the external bottom-side MOSFET. This This pin is also the negative input to the differential current pin has an output swing from GND to BOOST. comparator(DFN only) and an input to the reverse current comparator. Normally this pin is connected to the source
TG (Pin 9/Pin 12):
Top Gate Driver Output. This pin drives of the external topside MOSFET, the drain of the external the gate of the external topside MOSFET. This pin has an bottom-side MOSFET, and the inductor. output swing from GND to BOOST.
Exposed Pad (Pin 13, DD Only):
Ground. The Exposed
BOOST (Pin 10/Pin 13):
Positive Supply Pin for the Gate Pad is ground and must be soldered to the PCB ground Driver Circuitry. A bootstrapped capacitor, charged with for electrical contact and optimal thermal performance. an external Schottky diode and a boost voltage source, is connected between the BOOST and SW pins. Voltage swing
GND (Pins 1, 9 GN Only):
Ground. at the BOOST pin is from boost source voltage (typically
PGOOD (Pin 4, GN Only):
Power Good Output Voltage VIN) to this boost source voltage + VIN. Monitor Open-Drain Logic Output. This pin is pulled to
VIN (Pin 11/Pin 14):
This pin powers the control circuitry ground when the voltage on the feedback pin VFB is not and serves as the positive input to the differential current within ±13.3% of its nominal set point. comparator.
SENSE– (Pin 15, GN Only):
Negative Input to the Differential Current Comparator. Normally this pin is connected to the source of the external topside MOSFET. 38221f 7
