MP2905EK-LF

MP2905 3V-28V Input, Hysteretic Synchronous Step-Down Controller The Future of Analog IC Technology DESCRIPTION FEATURES The MP2905 is a hysteretic voltage-mode control, Wide 3V to 28V Operating Input Range synchronous PWM buck controller. The output Output Adjustable from 0.6V to 0.9*Vin voltage can be regulated from 0.6V to 0.9*VIN. It Switching frequency from 200kHz to 500kHz achieves high output current over a wide input Programmable Soft-Start supply range from 3V-28V. Hiccup current limit MP2905 integrates an internal LDO regulator that Lossless peak current sensing makes the controller function at a wide input MSOP-10 package supply. Hysteretic voltage-mode control provides fast APPLICATIONS transient response without additional loop Motherboard Power Supplies compensation. AGP and PCI-Express Power Supplies An adjustable soft-start prevents inrush current at Graphic-Card Power Supplies turn-on. The device senses high-side switch Set-Top Boxes voltage drop for hiccup current limit and short Point-of-Load Power Supplies current protection. The frequency is adjustable from 200kHz to 500kHz. The MP2905 is available in 10-pin MSOP package, provides a very compact system solution with minimal reliance on external components. TYPICAL APPLICATION MP2905 Rev. 1.0 www.monolithicpower.com 1 9/18/2015 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2015. All Rights Reserved. MP2905- 3V to 28V INPUT, HYSTERETIC SYNCHRONOUS STEP-DOWN CONTROLLER ORDERING INFORMATION Part Number* Package Top Marking Temperature MP2905EK MSOP10 2905E 40 C to +85C *For Tape & Reel, add suffix Z (eg. MP2905EKZ). For RoHS compliant packaging, add suffix LF (eg. MP2905EKLFZ) PACKAGE REFERENCE TOP VIEW FB 1 10 ILIM SS 2 9 IN REF 3 8 HG GND 4 7 SW LG 5 6 BST (3) (1) Recommended Operating Conditions ABSOLUTE MAXIMUM RATINGS Supply Voltage V .............................. 3V to 28V IN IN to GND .............-0.3V to +30V Operating Temperature .............40 C to +85 C REF to GND ................-0.3V to +6.5V IN to REF ......................-0.3V to +25V (4) Thermal Resistance JA JC SS to GND .... -0.3V to (REF + 0.3V) MSOP10-EP ............................. 150 65 C/W LG to GND .. -0.3V to (REF + 0.3V) BST to GND.. -0.3V to 36.5V Notes: BST to SW....-0.3V to + 6.5V 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the SW to GND....-0.3V to +30V maximum junction temperature. T(MAX) the junction-to- J HG to SW ...-0.3V to (BST + 0.3) V ambient thermal resistance. and the ambient temperature, JA FB to GND..-0.3V to +6.5V T the maximum allowable power dissipation at any ambient A temperature is calculated using: P (MAX)=(T (MAX)-T )/ . D J A JA ILIM to GND .................-0.3V to (IN + 0.3V) Exceeding the maximum allowable power dissipation will ILIM to SW .-0.6V to (IN + 0.3V) cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry HG and LG continuous current...250mA RMS protects the device from permanent damage. Thermal (2) o Continuous Power Dissipation (TA = +25C) shutdown engages at T =140 C(TYP) and disengages at J o T =120 C(TYP) J .0.77W 3) The device is not guaranteed to function outside of its Junction Temperature.............................+140C operating conditions. Storage Temperature Range 4) Measured on JESD51-7 4-layer board .....................................-65C to +150C Lead Temperature (soldering, 10s) ........................................................+300C MP2905 Rev. 1.0 www.monolithicpower.com 2 9/18/2015 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2015. All Rights Reserved.