銆�銆�LTC3569鏄竴娆鹃仼鐢ㄤ簬鎵嬫寔寮忚ō鍌欑殑绶婃箠鍨�闆绘簮瑙ｆ焙鏂规銆傚叾绾栧阀鍨� 3mm x 3mm QFN 灏佽涓収(n猫i)缃簡涓夊�嬪叿鏈夊彲鍠崹绶ㄧ▼杓稿嚭闆诲鐨勯檷澹撳瀷 (Buck) 绌�(w臎n)澹撳櫒銆備竴鍊嬬┅(w臎n)澹撳櫒鍙敮鎸侀珮閬� 1200mA 鐨勮矤杓夐浕娴�锛岃�屽叾浠栧叐鍊嬬┅(w臎n)澹撳櫒鍓囧彲鏀寔鑷� 600mA 鐨勮矤杓夐浕娴�?锛熸ⅱ鍥钃氣偓绌�(w臎n)澹撳櫒骞惰伅(li谩n)璧蜂締浣跨敤浠ユ彁鍗囪矤杓夎兘鍔涖�傛瘡鍊嬮浕娴佹ā寮忕┅(w臎n)澹撳櫒鍦ㄥ収(n猫i)閮ㄩ�茶瑁滃劅锛屽叿鏈夊崜瓒婄殑璨犺級鍜岄浕澹撹(di脿o)绡�(ji茅)鎬ц兘銆傚畬鏁寸殑鍏╄几鍑烘垨涓夎几鍑鸿В姹烘柟妗堝彧闇�鏁�(sh霉)鐩サ灏戠殑澶栭儴鐒℃簮鍏冧欢銆�
銆�銆�LTC3569 鐨勪笁鍊嬭几鍑洪浕澹撳彲绨″柈鍦伴�氶亷灏嶅叾鍚勮嚜鐨勪娇鑳藉紩鑵抽�茶闁嬮棞(gu膩n)鍒囨彌渚嗙崹绔嬬法绋嬨�傛瘡娆＄暥鏌愬�嬩娇鑳藉紩鑵抽亣鍒颁竴鍊嬩笅闄嶆部鏅�锛屽墖灏嶄竴鍊� 4 浣嶈▓鏁�(sh霉)鍣ㄩ�茶閬炴笡瑷堟暩(sh霉)銆傚湪缍�(j墨ng)閬庝竴鍊� 120渭s 鐨勮秴鏅傚欢閬蹭箣鍚� (寰炰娇鑳藉紩鑵充笂鐨勪竴鍊嬩笂鍗囨部绠楄捣)锛岃▓鏁�(sh霉)鍣ㄧ殑鐙�鎱�(t脿i)灏囬帠瀛樿嚦鍙嶉鍩烘簴闆诲 DAC 涓�銆傞�欐ǎ锛屽氨鑳藉鍦� 800mV (鍏ㄦ搴�) 鑷� 425mV 鐨勮寖鍦嶅収(n猫i)浠� 25mV 姝ラ�插皪鍩烘簴闆诲瀵︽柦绶ㄧ▼銆�
銆�銆�LTC3569 鐨勯檷澹撳瀷绌�(w臎n)澹撳櫒鍙�熷姪骞惰伅(li谩n)鐨勬柟寮忎締鎻愪緵杓冮珮鐨勮矤杓夎兘鍔�銆傞�氶亷鎶婂叐鍊� 600mA 绌�(w臎n)澹撳櫒涔嬩竴鐨勫弽楗嬪紩鑵抽浕骞充笂鎷夎嚦杓稿叆闆绘簮闆诲锛岃┎绌�(w臎n)澹撳櫒鐨勫姛鐜囩礆灏囪閲嶆柊閰嶇疆鐐轰竴鍊嬪緸灞浕婧愶紝姝ゆ檪闁嬮棞(gu膩n)鎿嶄綔琚悓姝ヨ嚦鍏朵笂娓镐富鎺у櫒銆侭uck 2 鍙互鏄� Buck 1 鐨勪竴鍊嬪緸灞浕婧�锛屾垨 Buck 3 鏄� Buck 2 鐨勪竴鍊嬪緸灞浕婧�銆傜暥閬嬩綔浜庡緸灞ā寮忔檪锛屽緸灞枊闂�(gu膩n)寮曡叧鑸囦富鎺ч枊闂�(gu膩n)寮曡叧鐩稿苟鑱�(li谩n)锛屼笖杓稿嚭闆绘祦鐩稿姞銆傞�欏皣鐢�(ch菐n)鐢熶笁绋彲鑳界殑绲勫悎锛氫笁鍊嬬崹绔嬬殑绌�(w臎n)澹撳櫒(涓�鍊� 1.2A 闄嶅鍨嬬┅(w臎n)澹撳櫒鍜屽叐鍊� 0.6A 闄嶅鍨嬬┅(w臎n)澹撳櫒)銆佸叐鍊嬬崹绔嬬殑 1.2A 闄嶅鍨嬬┅(w臎n)澹撳櫒銆佹垨鍏╁�嬪垎鍒ョ偤 1.8A 鍜� 0.6A 鐨勭崹绔嬮檷澹撳瀷绌�(w臎n)澹撳櫒銆�
銆�銆�LTC3569 鍏锋湁涓�鍊� PGOOD (闆绘簮鑹ソ) 寮曡叧锛岀敤浜庡湪浠讳綍浣胯兘绌�(w臎n)澹撳櫒杓稿嚭闆诲涓婂崌鑷崇法绋嬪�肩殑 8% 浠ュ収(n猫i)鏅傜櫦(f膩)鍑烘寚绀轰俊铏�銆傚鏋滀娇鑳借几鍑洪浕澹撲腑浠讳綍涓�鍊嬩綆浜庣法绋嬪��锛屽墖 PGOOD 寮曡叧灏囨媺鑷充綆闆诲钩銆傝嫢鎵�鏈夌┅(w臎n)澹撳櫒闂�(gu膩n)鏂�锛屽墖 PGOOD 寮曡叧鎷夎嚦浣庨浕骞充笖 LTC3569 灏囬�插叆涓�绋綆鍔熺巼鍋滄妯″紡 (瑭叉ā寮忕殑闆绘簮闆绘祦 <1渭A)銆�
銆�銆�绡�(ji茅)鑳介亱浣滄ā寮�
銆�銆�LTC3569 鎻愪緵浜嗗叐绋搷浣滄ā寮� (鍒╃敤 MODE 寮曡叧渚嗚ō瀹�)锛岀敤浜庢敼鍠勮紩璨犺級鏅傜殑鏁堢巼銆傚湪浣庤矤杓夐浕娴佹浠朵笅锛岀獊鐧�(f膩)妯″紡 (BurST Mode?) 鎿嶄綔鐨勬晥鐜�锛岃�岃剤娌栬烦韬嶆ā寮忓墖鍙敘(ch菐n)鐢熻純浣庣殑绱嬫尝闆绘祦銆傚湪鍟熷嫊鏅�锛屽皣鑷嫊閬告搰鑴堟矕璺宠簫妯″紡锛岀洿鍒拌粺璧峰嫊鏂滃潯鐨勬湯绔偤姝�銆�
銆�銆�鍙法绋嬫檪閻橀牷鐜�
銆�銆�闁嬮棞(gu膩n)闋荤巼鍙浐瀹氫簬 2.25MHz (閫氶亷灏� RT 寮曡叧闆诲钩涓婃媺鑷宠几鍏ラ浕婧愰浕澹�)锛屾垨鑰呬篃鍙互鍒╃敤涓�鍊嬫帴鍦板畾鏅傞浕闃诲櫒灏囨檪閻橀牷鐜囪ō缃湪 1MHz 鑷� 3MHz 涔嬮枔銆傚鏋滀竴鍊嬫檪閻樹俊铏熻鏂藉姞鑷� MODE 寮曡叧锛屽彧瑕佸叾闋荤巼楂樹簬閲囩敤 RT 寮曡叧鎵�瑷疆鐨勯牷鐜�锛屽墖 LTC3569 鐨勬檪閻樺皣琚敞闋婚帠鐩歌嚦澶栭儴鏅傞悩銆傞噰鐢ㄦ敞闋婚帠鐩告檪锛屽櫒浠剁殑鎿嶄綔妯″紡灏囪嚜鍕曡ō瀹氳嚦鑴堟矕璺宠簫銆�
銆�銆�鍏╄矾杓稿嚭銆佸彲鍠崹绶ㄧ▼鐨� 1.2A 绌�(w臎n)澹撳櫒
銆�銆�涓�绋叐璺几鍑烘噳鐢�锛屽叾涓�锛屾瘡鍊嬭几鍑洪兘鍙毃鏅傞噸鏂拌ō缃嚦涓�鍊� 1.2V 鐨勫緟姗熼浕澹撴垨涓�鍊� 1.8V 鐨勯亱琛岄浕澹�銆傞�欏叐璺几鍑哄潎鑳藉緸涓�鍊� 2.8V 鑷� 4.2V 鐨勯嫲闆㈠瓙闆绘睜闆诲鎻愪緵楂橀仈 1.2A 鐨勮矤杓夐浕娴�銆傚湪杓曡矤杓夋浠朵笅锛岄伕鎿囧煼(zh铆)琛岀獊鐧�(f膩)妯″紡鎿嶄綔浠ュ鐝�(xi脿n)楂樻晥鐜�銆傚湒 2 鑷冲湒 5 绀哄嚭浜嗗叐璺几鍑洪浕澹撶殑鐛ㄧ珛绶ㄧ▼ (閫氶亷灏嶅悇鑷殑浣胯兘寮曡叧閫茶闁嬮棞(gu膩n)鍒囨彌锛屽苟鍚戞瘡鍊嬭矤杓夋彁渚� 625mA 鎭掑畾闆绘祦)銆�
缍韩闆诲瓙閫氾紝闆诲瓙鐭ヨ瓨锛屼竴鏌ョ櫨閫�锛�
宸叉敹閷勮姊�168449鍊�
