HT7466_14 Datasheet, PDF (3/9 Pages) Holtek Semiconductor Inc – 3A Step-Down DC to DC Converter

HT7466
Pin Description
Pin No.
Pin Name
Description
Soft-start input.
1
SS
If the soft start function is to be used then an external capacitor should be connected
between this pin and ground. If the soft start function is not required the pin should be
left open.
Internal power NMOS gate drive boost input.
2
BS A 10nF or greater value capacitor should be connected from SW to BS for additional
Power NMOS gate driving purposes.
Power supply input.
3
VIN The input supply pin for the device, VIN, is connected to a supply voltage between 4.75V
to 24V.
4
SW
Power switching output.
The internal power MOS drain is connected to the inductor, diode and VIN.
5
GND
Ground.
Device ground voltage reference.
Feedback pin.
6
FB The feedback pin is connected to an external resistor divider to measure the output
voltage.
Error amplifier output.
7
COMP Used for compensation of the regulation control loop. Connect a series RC network from
COMP to GND to compensate the regulation control loop. The COMP pin value is 1.222V.
Enable input.
8
EN This pin is set high to turn on the regulator and low to turn it off. The pin should be left
unconnected if not used.
Exposed Pad
GND
Ground.
Device ground voltage reference.
Absolute Maximum Ratings
Maximum Input Supply Voltage.............................26V
Switch Node Voltage..............................................26V
Feedback Voltage......................................................6V
EN Voltage................................................................6V
Comp Voltage...........................................................6V
SS Voltage.................................................................6V
Maximum Junction Temperature........................ 150°C
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
Recommended Operating Conditions
Input Supply Voltage................................4.75V ~ 24V
Ambient Temperature Range................ -40°C ~ +85°C
Rev. 1.20
3
September 11, 2014