600mA Step-down DC/DC Converter with Synchronous Rectifier
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The AP3405 is a 2.0MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 600mA load with high efficiency, excellent line and load regulation. The high efficiency is easily configured by using an inductor, resistors and capacitors as the external components. Current mode control provides fast transient response and cycle-by-cycle current limit.
The AP3405 employs complete protection to ensure system security, including input Undervoltage Lockout, Overtemperature Protection and hiccup mode Short Circuit Protection.
This IC is available in U-DFN2020-8 package.
Efficiency (%) |
95 |
|---|---|
Frequency Typ (Hz) |
2000 |
Frequency Typ (kHz) |
2000 |
HS RDS(ON) (mΩ) |
380 |
LS RDS(ON) (mΩ) |
300 |
MaximumInput Voltage (V) |
5.5 |
Maximum Output Voltage (V) |
ADJ |
MinimumInput Voltage (V) |
2.3 |
Output Current (A) |
0.6 |
Output Current (A) |
0.6 |
Output Voltage (V) |
ADJ |
Quiescent Current Typ (μA) |
0.035 |
Shutdown Current Typ (µA) |
5 |
Shutdown Current Typ (µA) |
5 |
Type |
Buck |
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A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2770 | 2025-10-30 | 2025-10-30 | Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products |
| PCN-2512 | 2021-04-16 | 2021-07-16 | Qualified Additional Assembly & Test (A/T) Site |
