ZHCSMU1G October 2020 – May 2024 LMR43610-Q1 , LMR43620-Q1
PRODUCTION DATA
| PIN | TYPE | DESCRIPTION | ||
|---|---|---|---|---|
| NO. | NAME | |||
| 1 | RT or MODE/SYNC | A | For the RT variant, the switching frequency
can be adjusted from 200kHz to 2.2MHz. For the MODE/SYNC variant, the switching frequency can operate in user-selectable PFM/FPWM mode and can be synchronized to an external clock.Do not float this pin. | |
| 2 | PGOOD | A | Open-drain power-good flag output. Connect to a suitable voltage supply through a current limiting resistor. High = power OK, low = power bad. This pin goes low when EN = low. This pin can be open or grounded when not used. | |
| 3 | EN/UVLO | A | Enable input to regulator. High = ON, low = OFF. Can be connected directly to VIN. Do not float this pin. | |
| 4 | VIN | P | Input supply to regulator. Connect a high-quality bypass capacitor or capacitors directly to this pin and GND. | |
| 5 | SW | P | Regulator switch node. Connect to power inductor. | |
| 6 | BOOT | P | Bootstrap supply voltage for internal high-side driver. Connect a high-quality 100nF capacitor from this pin to the SW pin. | |
| 7 | VCC | P | Internal LDO output. Used as supply to internal control circuits. Do not connect to external loads. Can be used as logic supply for power-good flag. Connect a high-quality 1μF capacitor from this pin to GND. | |
| 8 | VOUT/FB | A | Fixed output options and adjustable output options are available with the VOUT/FB pin variant. Connect to the output voltage node for fixed VOUT. Connect to tap point of feedback voltage divider for adjustable VOUT. See Section 8.2.2.2.1 for how to select feedback resistor divider values. Check Section 4 for more details. Do not float this pin. | |
| 9 | GND | G | Power ground terminal. Connect to system ground. Connect to CIN with short, wide traces. | |
| A = Analog, P = Power, G = Ground | ||||