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MAX797

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control

MAX797

High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX797Hhigh-performance,step-downDC-DCconverterprovidesmainCPUpowerinbattery-poweredsystems.A40Vratingonthepowerstage’sinputallowsoperationwithhigh-cell-countbatteriesandawiderangeofACadaptors.Thisbuckcontrollerachieves96efficiencyby

MAX797

同步整流降壓型控制器，用于CPU電源; ? 效率為96%\n\n? 輸入范圍：4.5V至30V\n\n? 可調(diào)輸出范圍：2.5V至6V\n\n? 預(yù)設(shè)3.3V和5V輸出（高達(dá)10A）\n\n? 多個(gè)穩(wěn)壓輸出\n\n? +5V線性穩(wěn)壓器輸出\n\n? 精密2.505V基準(zhǔn)電壓輸出\n\n? 自動(dòng)自舉電路\n\n? 150kHz/300kHz固定頻率PWM工作模式\n\n? 可編程軟啟動(dòng)\n\n? 典型靜態(tài)電流：375μA（VIN = 12V，VOUT = 5V）\n\n? 關(guān)斷電流：1μA（典型值）;

MAX796/MAX797/MAX799高性能、降壓型DC-DC轉(zhuǎn)換器具有單路或雙路輸出，可為電池供電系統(tǒng)提供主CPU電源。這些降壓控制器通過使用同步整流和Maxim專有的Idle Mode?控制方案實(shí)現(xiàn)96%的效率，以延長滿載（高達(dá)10A）和空載輸出下的電池使用時(shí)間。出色的動(dòng)態(tài)響應(yīng)可在五個(gè)300kHz時(shí)鐘周期內(nèi)糾正由最新的動(dòng)態(tài)時(shí)鐘CPU引起的輸出瞬變。專門設(shè)計(jì)的自舉電路可驅(qū)動(dòng)實(shí)惠的N溝道MOSFET，從而降低系統(tǒng)成本并消除某些PMOS/NMOS開關(guān)設(shè)計(jì)中的瞬態(tài)開路開關(guān)電流。\n\n MAX796/MAX799特別配備了次級(jí)反饋輸入(SECFB)，適用于基于變壓器的雙路輸出應(yīng)用。該次級(jí)反饋路徑改善了正(MAX796)輔助輸出或負(fù)(MAX799)輔助輸出的交叉調(diào)節(jié)。\n\n MAX797具有邏輯控制和可同步的固定頻率脈寬調(diào)制(PWM)工作模式，可減少敏感型移動(dòng)通信和筆輸入應(yīng)用中的噪聲和射頻干擾。反SKIP覆蓋輸入支持在輕負(fù)載條件下自動(dòng)切換到空閑工作模式（以實(shí)現(xiàn)高效脈沖跳躍），或強(qiáng)制進(jìn)入固定頻率工作模式以在所有負(fù)載下實(shí)現(xiàn)超低噪聲。\n\n MAX796/MAX797/MAX799均采用16引腳DIP和窄體SO封裝。請(qǐng)參見下表以比較這三種轉(zhuǎn)換器。\n\n ?\n\n

MAX797

Step-Down Controllers with Synchronous Rectifier for CPU Power

MAX797C/D

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control

MAX797CPE

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control

MAX797CSE

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control

MAX797CSLASHD

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96%efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?co

MAX797EPE

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control

MAX797ESE

Step-Down Controllers with Synchronous Rectifier for CPU Power

GeneralDescription TheMAX796/MAX797/MAX799high-performance,stepdownDC-DCconverterswithsingleordualoutputs providemainCPUpowerinbattery-poweredsystems.Thesebuckcontrollersachieve96efficiencybyusing synchronousrectificationandMaxim’sproprietaryIdleMode?control