Step-down (Buck)
DC-DC Converters
AKM's Step-Down DCDC Converters are most suitable for wide-range input and output applications and able to realize efficient power components for car infotainment systems. Samples are available.
Power Control ICs
High-accuracy Step-down DC-DC Converter
with 4.5A MOSFET
AP3440ABN
The AP3440ABN is a synchronous rectification PWM control step-down DC-DC converter of the current mode with excellent transient load response characteristics.
The recommended operational temperature ranges from −40 to 125ºC. It is capable for automotive use that demands high reliability.
The AP3440ABN is equipped with Output Over-Current Protection, Output Over-Voltage Protection, Under Voltage Lock Out, Thermal Protection, and Power-good function.
Supporting High Reliability Systems
The output voltage is constantly monitored by ±2% high precision power good function. When the output voltage is in an abnormal state, the AP3440 sends the error flag signal to microcomputers promptly. It supports a fail-safe environment with appropriate data saving processing.
Downsizing PCB
The AP3440 integrates a MOSFET that can supply maximum output current of 4.5A in a 5mm × 5mm 28-pin QFN package with a heat dissipation pad on the back surface. 2.1MHz operation helps miniaturizing peripheral components. Therefore, a printed circuit board can be downsized.
150℃ warranty
Electrical characteristics are guaranteed in Tj = -40 to 150℃, assuming operation environments that require high reliability.
Lineup
Step-down (Buck) DC-DC Converters
Part Number |
Part Status |
Number of Outputs |
Topology |
Synchronous |
Power MOSFET |
Input Voltage (MIN.) [V] |
Input Voltage (TYP.) [V] |
Input Voltage (MAX.) [V] |
Output Voltage [V] |
Output Current (MAX.) [A] |
Other |
Operating Temperature [℃] |
Device Package |
Number of Pins |
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AP3440ABN111 |
MP |
1 |
Step - down |
Yes |
Internal |
4.1 |
5.5 |
1.112 |
4.5 |
Automotive grade |
-40 to 105 |
HWQFN |
28 |
|
AP3440ABN122 |
MP |
1 |
Step - down |
Yes |
Internal |
4.1 |
5.5 |
1.227 |
4.5 |
Automotive grade |
-40 to 125 |
HWQFN |
28 |
|
AP3440ABN182 |
MP |
1 |
Step - down |
Yes |
Internal |
4.1 |
5.5 |
1.822 |
4.5 |
Automotive grade |
-40 to 105 |
HWQFN |
28 |