JAJSM60B January 2023 – January 2024 LMR38020-Q1
PRODUCTION DATA
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
GND | 1 | G | Power and analog ground terminal. All electrical parameters are measured with respect to this pin. Connect a high-quality bypass capacitor directly to this pin and VIN with short and wide traces. |
EN | 2 | A | Enable input to regulator. High = ON, low = OFF. Can be connected directly to VIN. Do not float. |
VIN | 3 | P | Input supply to the regulator. Connect a high-quality bypass capacitor or capacitors directly to this pin and GND with short and wide traces. |
RT/SYNC | 4 | A | Resistor timing or external clock input. An internal amplifier holds this pin at a fixed voltage when using an external resistor to ground to set the switching frequency. If the pin is pulled above the PLL upper threshold, a mode change occurs and the pin becomes a synchronization input. The internal amplifier is disabled and the pin is a high impedance clock input to the internal PLL. If clocking edges stop, the internal amplifier is re-enabled and the operating mode returns to frequency programming by resistor. |
FB | 5 | A | Feedback input to the regulator. Connect to tap point of the feedback voltage divider. Do not float. Do not ground. |
PG | 6 | A | Open-drain power-good flag output. Connect to a suitable voltage supply through a current limiting resistor. High = power OK, low = power bad. The flag pulls low when EN = low. Can be left open when not used. |
BOOT | 7 | P | Bootstrap supply voltage for the internal high-side driver. Connect a high-quality 100-nF capacitor from this pin to the SW pin. |
SW | 8 | P | Regulator switch node. Connect to a power inductor. |
EP | THERMAL PAD | Thermal | Connect to system ground. |