| Parameter | Old Revision (Rev A) | | Impact | | :--- | :--- | :--- | :--- | | Quiescent Current (Standby) | 5 mA | 1.8 mA | Better battery life in standby | | Shutdown Current | 80 µA | 3 µA | Critical for low-power IoT devices | | Feedback Voltage Tolerance | ±4% | ±2% | Improved output regulation | | Thermal Shutdown Temp | 150°C | 165°C | Higher headroom for hot environments | | ESD (HBM) | 2 kV | 4 kV | More robust handling | Note: The "new" datasheet also explicitly warns against floating the Enable (EN) pin —a common error in older designs. The EN pin now has an internal 5 µA pull-up current; leave it open for auto-start or drive high for operation. 3. Pin Configuration (Top View - TO-252-5L) The new Pan186CV uses a 5-pin TO-252 package. Here is the updated pinout from the datasheet:

52°C/W (Minimum copper area) Junction-to-Ambient (RθJA): 28°C/W (With 2 oz copper plane)

| Pin No. | Symbol | Description | | :--- | :--- | :--- | | 1 | | Supply input (4.5V to 40V). Bypass with 10µF + 0.1µF ceramic near pin. | | 2 | SW | Switching node. Connect to inductor (33µH–100µH typical). | | 3 | GND | Power ground. Must be connected to exposed thermal pad. | | 4 | FB | Feedback input. Connect resistor divider (Vout = 1.23V * (1 + R1/R2)). | | 5 | EN | Enable input. Logic high (>1.6V) to enable; low (<0.8V) to disable. |