Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.
SOT26-Chip-Image.png1MHZ, 2A STEP-DOWN DC-DC BUCK CONVERTER
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The AP3445L is a 2A step-down DC-DC converter. At heavy load, the constant-frequency PWM control performs excellent stability and transient response. No external compensation components are required.
The AP3445L supports a range of input voltages from 2.7V to 5.5V allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. The AP3445L employs internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1μA. Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge.
The AP3445L delivers 2A maximum output current while consuming only 55μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AP3445L an ideal choice for high output voltage, high current applications which require a low dropout threshold. Pulse skip mode to maintain high efficiency at light-load conditions.
The AP3445L is available in SOT26 (SC74R) package.
AP3445L: Latch Off Protection
AP3445: Hiccup Mode Protection
AP3445L: Latch Off Protection
AP3445: Non Latch Off Protection
| Compliance(Only Automotive supports PPAP) | Standard |
|---|---|
| Type | Buck |
| Minimum Input Voltage (V) | 2.5 |
| Maximum Input Voltage (V) | 5.5 |
| Output Current (A) | 2 |
| Minimum Output Voltage (V) | 0.6 |
| Maximum Output Voltage (V) | VIN |
| Quiescent Current Typ (µA) | 55 |
| Shutdown Current Typ (µA) | N/A |
| Frequency Typ (kHz) | 1000 |
| HS RDS(ON) (mΩ) | N/A |
| LS RDS(ON) (mΩ) | N/A |
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-2531 | 2021-07-30 | 2022-01-29 | Additional Die Revision, Redistribution Layer (RDL), BUMP Sites (SJSEMI and LBS), as well as Assembly/Test (A/T) Site (CAT) |
| PCN-2512 | 2021-04-16 | 2021-07-16 | Qualified Additional Assembly & Test (A/T) Site |
