| 1 |
1 |
EN |
High-voltage-compatible input for circuit activation. If this pin is low, the part is off. |
| 2 |
2 |
BST |
High-Side Driver Supply. Connect a 0.1μF capacitor between LX and BST for proper operation. |
| 3,9 |
3,7 |
SUP |
IC Supply Input. Connect a 1μF or larger ceramic capacitor in parallel with a 4.7μF cap from SUP to PGND. |
| 4,5,7,8 |
4,6 |
PGND |
Power Ground. Connect all PGND pins together. |
| 6 |
5 |
LX |
BUCK Switching Node. High impedance when part is off. Connect LX to the switched side of the appropriate inductor. |
| 10 |
8 |
GND |
Analog Ground
|
| 11 |
9 |
BIAS |
1.8V Internal BIAS Supply. Connect a minimum of 2μF ceramic capacitor to PGND. |
| 12 |
10 |
FB |
Feedback Pin. Connect a resistor-divider from OUT to FB to GND for external adjustment of output voltage. Connect to BIAS for internal fixed voltages. |
| 13 |
11 |
OUT |
Buck Regulator Output Voltage-Sense Input. Bypass OUT to PGND with a minimum capacitor as for appropriate paragraph. |
| 14 |
12 |
VEA |
Internal Voltage Loop Error-Amplifier Output. Connect to VEA of the target for dual-phase operation. Leave unconnected for single-phase operation. |
| 15 |
13 |
PGOOD |
Open-Drain Reset Output. External pull-up required. |
| 16 |
14 |
SYNC |
SYNC. If connected to GND, Skip-mode operation is enabled under light loads. If connected to BIAS, forced-PWM mode is enabled. |
| 17 |
15 |
SYNCOUT |
180-Degree Out-of-Phase Clock Output for Multiphase Operation. Leave SYNCOUT open for single-phase operation. |
