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MAX8620YETD Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX8620YETD Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 18 page General Description 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™ Features ♦ Three Regulators and a Reset in One Package ♦ High-Efficiency Step-Down Converter Up to 4MHz Fixed Switching Frequency 500mA Guaranteed Output Current 0.6V to 3.3V Adjustable Output Voltage ±2% Initial Accuracy Fast Voltage-Positioning Transient Response Internal Synchronous Rectifier ♦ Two 300mA LDO Regulators 200mV Dropout at 200mA Load Low 45µVRMS Output Noise 3% Accuracy over Line, Load, and Temperature Overcurrent Protection Nine Pin-Selectable Output-Voltage Settings ♦ 30ms (min) RESET Output Flag ♦ 2.7V to 5.5V Input ♦ 115µA (typ) Supply Current at No Load ♦ Thermal-Overload Protection ♦ Tiny 3mm x 3mm x 0.8mm TDFN Package µPMIC for Microprocessors or DSPs in Portable Equipment ________________________________________________________________ Maxim Integrated Products 1 Ordering Information MAX8620Y OUT1 VIN VLOGIC 100k Ω RESET OUT2 LX FB GND IN2 BP HF_PWR PWR_ON SEL1 RESET SEL2 EN2 IN1 1.80V, 2.60V, 2.80V, 2.85V, 3.00V, OR 3.30V* 300mA 1.80V, 2.50V, 2.60V, 2.85V, OR 3.00V* 300mA OUT3 0.6V TO 3.3V 500mA *USE SEL1 AND SEL2 TO SET VOUT1 AND VOUT2 PART TEMP RANGE PIN- PACKAGE TOP MARK MAX8620YETD -40°C to +85°C 14 TDFN-EP (T1433-2) AAB Typical Operating Circuit 19-3564; Rev 0; 1/05 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MSM is a trademark of QUALCOMM, Inc. XScale is a trademark of Intel Corp. ARM is a trademark of ARM Limited. OMAP is a trademark of Texas Instruments, Inc. EVALUATION KIT AVAILABLE Pin Configuration appears at end of data sheet. |
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