Analog Devices / Maxim Integrated MAX15021 Dual 4A/2A Step-Down DC-DC Regulators
Analog Devices Inc. MAX15021 Dual 4A/2A Step-Down DC-DC Regulators offer tracking (coincident and ratiometric) and sequencing options. MAX15021 operates from 2.5V to 5.5V and each output can be adjusted from 0.6V to the input supply (VAVIN). Maxim Integrated MAX15021 step-down DC-DC regulator delivers up to 4A (regulator 1) and 2A (regulator 2) of output current. This ADI 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 MAX15021 utilizes a voltage-mode control scheme with external compensation to provide good noise immunity and maximum flexibility in selecting inductor values and capacitor types. MAX15021 is optimized for use in a variety of applications, including RFID reader cards, automotive multimedia, and PoE IP phones.
Features
- 2.5V to 5.5V Input-voltage range
- Dual-output synchronous buck regulators
- Integrated switches for 4A and 2A output currents
- 180° Out-of-phase operation
- Output voltage adjustable from 0.6V to VAVIN
- Lossless, cycle-by-cycle current sensing
- External compensation for maximum flexibility
- Digital soft-start and soft-stop for tracking applications
- Digital soft-start into a prebiased load for sequencing applications
- Sequencing or coincident/ratiometric tracking
- Programmable switching frequency from 500kHz to 4MHz
- Thermal shutdown and hiccup-mode short-circuit protection
- 20μA Shutdown current
- 100% Maximum duty cycle
Applications
- RFID reader cards
- Power-over-Ethernet (PoE) IP phones
- Automotive multimedia
- Multivoltage supplies
- Networking/telecom
公開: 2012-04-19
| 更新済み: 2023-04-12