The MAX8620Y micro-power-management integrated circuit (µPMIC) powers low-voltage microprocessors or DSPs in portable devices. The µPMIC includes a high- efficiency step-down DC-DC converter, two low-dropout linear regulators (LDOs), a microprocessor reset output, and power-on/off control logic. This device maintains high efficiency at light loads with a low 115µA supply current, and its miniature TDFN package makes it ideal for portable devices. The MAX8620Y’s step-down DC-DC converter utilizes a proprietary 4MHz hysteretic-PWM control scheme that allows for ultra-small external components. Internal syn- chronous rectification improves efficiency and elimi- nates the external Schottky diode that is required in conventional step-down converters. The output voltage is adjustable from 0.6V to 3.3V, with guaranteed output current up to 500mA. The MAX8620Y’s two LDOs offer low 45µVRMS output noise and a low dropout of only 200mV at 200mA. Each LDO delivers at least 300mA of continuous output cur- rent. The output voltages are pin selectable from 1.8V to 3.3V for flexibility. A microprocessor reset output (RESET) monitors OUT1 and warns the system of impending power loss allow- ing safe shutdown. RESET asserts during power-up, power-down, shutdown, and fault conditions where VOUT1 is below its regulation voltage. Applications Cellular Handsets Smart Phones/PDA Phones PDAs Wireless LAN Microprocessor and DSP Solutions including MSM™, XScale™, ARM™, and OMAP™ Fe
The MAX8620Y micro‑power‑management IC (uPMIC) is designed to power low‑core‑voltage microprocessors or DSPs in portable equipment. It combines a high‑efficiency step‑down converter, two low‑dropout linear regulators, a reset output, and power‑on/off control logic in a tiny 3 mm × 3 mm × 0.8 mm TDFN package.
Key features include an adjustable 0.6 V‑3.3 V output, up to 500 mA guaranteed converter current, two 300 mA LDOs with 200 mV dropout at 200 mA, low 45 µVRMS output noise, and built‑in thermal‑shutdown protection. The device is suited for cellular handsets, smartphones, PDAs, wireless LAN, and other portable systems that use Qualcomm MSM, Intel XScale, ARM, or TI OMAP processors.
| Maximum Converter Output Current | 500 mA |
|---|---|
| LDO Output Current | 300 mA per LDO |
| LDO Dropout Voltage | 200 mV at 200 mA |
| Output Noise | 45 µVRMS |
| Supply Current (no load) | 115 pA typ |
| Package | 3 mm × 3 mm × 0.8 mm TDFN |
It contains two low‑dropout linear regulators.
The step‑down converter can deliver up to 500 mA.
The supply current is typically 115 pA at no load.