The MAX15022 is a dual-output, pulse-width-modulated (PWM), step-down DC-DC regulator with dual LDO controllers. The device operates from 2.5V to 5.5V and each output can be adjusted from 0.6V to the input supply (VAVIN). The MAX15022 delivers up to 4A (regulator 1) and 2A (regulator 2) of output current with two LDO controllers that can be used to drive two external PNP transistors to provide two additional outputs. This device offers the ability to adjust the switching frequency from 500kHz to 4MHz and provides the capability of optimizing the design in terms of size and performance. The MAX15022 utilizes a voltage-mode control scheme with external compensation to provide good noise immunity and maximum flexibility in selecting inductor values and capacitor types. The dual switching regulators operate 180° out-of-phase, thereby reducing the RMS input ripple current and thus the size of the input bypass capacitor significantly. The MAX15022 offers the ability to track (coincident or ratiometric) or sequence during power-up and power-down operation. When sequencing, it powers up glitch-free into a prebiased output. Additional features include an internal undervoltage lockout with hysteresis and a digital soft-start/soft-stop for glitch-free power-up and power-down. Protection features include lossless cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. The MAX15022 is available in a space-saving, 5mm
The MAX15022 is a dual‑output, pulse‑width‑modulated step‑down DC‑DC regulator with integrated LDO controllers. It operates from a 2.5 V to 5.5 V input and provides adjustable outputs from 0.6 V up to the input voltage.
Key features include 4 A and 2 A output currents, programmable switching frequency from 500 kHz to 4 MHz, 180° out‑of‑phase operation, digital soft‑start/soft‑stop, and built‑in protection such as undervoltage lockout and hiccup‑mode short‑circuit protection. The device is offered in a 5 mm × 5 mm 28‑pin TQFN‑EP package and is rated for –40 °C to +125 °C operation. Typical applications are RFID reader cards, PoE IP phones, automotive multimedia, multivoltage supplies, and networking/telecom equipment.
| Regulator 1 Output Current | up to 4 A |
|---|---|
| Regulator 2 Output Current | up to 2 A |
| Switching Frequency Range | 500 kHz to 4 MHz |
| Package Type | 28‑pin TQFN‑EP, 5 mm × 5 mm |
| Operating Temperature Range | -40 °C to +125 °C |
| Enable Input Threshold (typ) | 1.207 V |
Regulator 1 can deliver up to 4 A of output current.
The switching frequency is programmable from 500 kHz to 4 MHz.
It is offered in a 28‑pin TQFN‑EP package measuring 5 mm × 5 mm.