LP2996 Datasheet, PDF(9/18 Page) National Semiconductor (TI) – DDR Termination Regulator

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

LP2996 Datasheet, PDF (9/18 Pages) National Semiconductor (TI) – DDR Termination Regulator

◁

àºà¢ àªà»

AVIN ÍÎÍ¼ PVIN

AVIN ÍÎÍ¼ PVIN Í¸ LP2996 Í·à°¿Í¢Í°à¢ àºÝ¯É» AVIN Í¸Éºàª¶à²º

à·¦Õ³à¿Í·à°¿Íà¼»Í¯Í Í±Ý¯ÎÎÎÍ¢É»PVIN Í¸ÉºVTT à©à©à¼»Í·à¥à¾

à®àªà¼»à°¿Í¢Í°Ý¯É»ÎÏÏ¦ÎÊÎ³Ï£Ï¯Í´ÎÍ¬Í¯Í¸à¾à°¿Í´à¢ àºÝ¯ÒÍ³

Îà°¿Ý¯Îà¼©ÍÍ¯à²à¡ÍÍ¤ÎÍ·ÎÕà³³Í°Í¢É» VTT Í´ÛÍà°¿Ñ¹Í·à§

ß¹ RSDON Í´ÎÍ¬Í¯à¥à¾Íà©ÍÝ¶ÎÎÍ¢ÍÉºPVIN Í´ß´à°¿Ñ¹Îà¼©

ÍÎÍ¹à ·àà¿à¬à¥à¾à°¿à½¶Îà«¿ÕÍÍ¤ÎÍÍ±ÍÍ°ÍÎÍ¢É» Í¨Í©Í Éº

PVIN Í´ß´à°¿Ñ¹Îà¼©ÍÎÍ±à²ºà·¦à°¿à¾à¬à£¦Íà«¿ÍÉºàªÍÜà³¤à°¤Í³

à©à»¿Îà¤¡ÍÎà»°àà°ºÍà©Í¡ÎÍ¢É» SSTL-2 ÎÏÏ¦ÎÊÎ³Ï£Ï¯Í°Í¸Éº

AVINÍ± PVIN ÎÍ±ÎÍ´ 2.5VÏ¨ÊÏ§Í´àªà¬Í¢ÎÍ·Íà ·Îà¬¥à±°Í°Í¢É»

à¹à½Í´ÎÎ 2 ÍÍ·àºà¢ ÎÝ¸à¸Í´ÏÎ ÏÎµÍ¢Îà¶à½Í¸ÍÎÎÍ¤ÎÉ»

à³à¾à°¿Ñ¹Í·àª¬àÍ´à¬°Í¢Îà¼Ò°Í·à©à»¿Í±Í Í¯ÉºPVIN Í¸ AVIN ÒÔ¼

Í°Í³ÍÎÍ¹Í³ÎÎÍ¤ÎÉ» Õ¡à±Í·à²ºà·¦à°¿à¾à¦«à¶Í´ÎÎà³¤Ï¦ÏÎ¿ÏÎÍ·

à±¸à¡Îà¹·ÍÍ¨ÎÉºPVIN Í¸ 3.3V ÒÔ¼Í·à°¿Ñ¹Ï¨ÊÏ§Í´àªà¬Í¢ÎÍÍ±

Îà¨ªà¦Í ÎÍ¢É» àªß¹à·¦Ô¹à±ÍÎ±ÊÏÏ§É¾Î³ÏÎ¿ÏÎ¼Î¢Ï¯Ô¹à±à¯ÍÎ

Í±ÉºÏÏÎ ÎµÍ¸ÏÏÏ¡ÎÏ§Í°Í·Î³ÏÎ¿ÏÎ¼Î¢Ï¯à£Í±à²Í¡à§à¬¶Í´à³ÎÉº

VREF Í¸Í¦Í·ÎÎÒ¡à£ÍÎÎÍ¢ÍÉºVTT Í¸ TRI-STATE Í´Í³ÎÎÍ¢É»

VDDQ

VDDQ Í¸à³à¾Í°ÉºVTT Í·Ï¨ÎªÏ¡Ï¨ÊÏÍ´à¶à½Í³à²ºà·¦Ï¦ÏÎÏ¨Ï¯Îµà°¿

Ñ¹Í·à©à©Í´à¢ÎÎÎÍ¢É»Ï¦ÏÎÏ¨Ï¯Îµà°¿Ñ¹Í¸ 2 Ý¸Í· 50kÐ à²ºà¬à°

ßÍ·à·¼Ñ¹Í´ÎÍ¬Í¯à©à©ÍÎÎÍ¢É»ÍÎÍ´ÎÍ¬Í¯ÉºVTT Í· VDDQ/2

Í´à¬°Í¢Îà©Ö¬Í³à¯¥à¥Íà²ÎÎÎÍ¢É»Ï¦ÏÊÏÉ¾Î·Ï¯ÎµÍ±Í³ÎÎÍÍ´

VDDQ àºà¢ Í´à´àª¢Í Í¯ÍÍ©ÍÍÉ» AVIN ÎÍ¨Í¸ PVIN Í·àÎÎÍ´Éº

DIMM à°ºÍ· 2.5V Î VDDQ Í´à¯àªàªà¬Í¢ÎÍ¹ÎÍÍ°Í ÎÍÉ»ÍÍ

Í¢ÎÍ±à²ºà·¦Ï¦ÏÎÏ¨Ï¯Îµà°¿Ñ¹Í¸Éºà°¿Ý¯à´àª¢Í°Í·à°¿Ñ¹ß±Ô¼Í·Ó¨Ú¹Î

à¤¡ÍÍ£Í´ÉºDDRÏÏÏ¦à·¦Í·à°¿à°¿Ý¯Ñ¹Í´à©Ö¬Í´à¯¥à¥Í ÎÍ¢É»SSTL-

2 ÎÏÏ¦ÎÊÎ³Ï£Ï¯Í° VDDQ Í¸ 2.5V Í³Í·Í°ÉºÎ»ÊÏÏÊÎ³Ï£Ï¯à°¿Ñ¹

VTT Í±Í Í¯ 1.25V Íà©à©ÍÎÎÍ¢É» ( Ô¹à±Í´à¬°Í¢Î VTT Í·à¸¡Ô½

àµ£ÒÍ·à©Ö¬Í³à®Í¸Ê®à°¿Ø¾à°¤à²à©Ê¯Í·à¶¯Îà¢à¦°Í Í¯ÍÍ©ÍÍ )É»

VSENSE

àºÎ·Ï¯Îµàºà¢ Í·à»¨à°¤Í¸ÉºÔàºÍ·à·ÕÏ¨ÎªÏ¡Ï¨ÊÎ³Ï£Ï¯Í·Õ¾àª³Í´Í

ÎÎÍ¢É» à¬ÍÍ·ÏÎ²ÊÏÊÏÍ°Í¸ÉºVTT Í¸à¯Íà´àª¢Îà¯¨Í¬Í¯Î»ÊÏ

ÏÊÎ³Ï£Ï¯à°ßÍ´àªà¬ÍÎÎÍ¢É»ÍÍ·Í±Í LP2996 Í·à¥à¾à°ºÍ°à°¿

Ñ¹Í·Î·Ï¯ÎµÎß¦ÍÍ±Éºà¯Íà´àª¢Í´ÎÍ¬Í¯ÍÙÎàÍÍ³à°¿Ñ¹ß±Ô¼Í´Î

ÎÉºÏÎµàºÍ·Î»ÊÏÏÊÎ³Ï£Ï¯à°¿Ñ¹Í¸ÏÎµÍ·à¬à°ºÎÎÎà¯¿ÍÍ³Í¬Í¯Í Î

Íà»°àÍà©Í¡ÎÍ¢É»Í¦ÍÍ°ÏÎµÍ·à®¤à°ºà·ÛÍ·à°¿Ñ¹Î VSENSE àº

à¢ Í´à¼©ÍÉºÏÎµÔàºÍ°à°¿Ñ¹Íà¯¿Ô¼Í¢Îà»°àÎÕ¾àª³Í¢ÎÎÍÍ´Í Í¯

ÍÍ©ÍÍÉ»ÍÍ·à¹à¹Í´ÎÎÏÎµàª¶à¬®Í·à°¿Ñ¹Íà¾Þ·Í´à¸Í¨ÎÎÍ¢É»

ÔàºÍ°Í·à·ÕÏ¨ÎªÏ¡Ï¨ÊÎ³Ï£Ï¯Îß¦ÎÍ³Íà§ß¹Í¸ÉºVSENSE àºà¢

Í´Í¸ VTT Îà¼©ÍÍ³ÍÎÍ¹Í³ÎÎÍ¤ÎÉ» VSENSE à§´ß¸Í·à´àª¢ÎÏÏ

Ï¦Í´ÛàªÍ Í¯à£®à«·Í¢Îà¡Í¸à®«ÒÍà¶à½Í°Í¢É» VSENSE à´àª¢Í´Ï

Î Î¶Íà¥à§Í¢ÎÍ±VTTÍ·à©Ö¬Í³Ï¨ÎªÏ¡Ï¨ÊÎ³Ï£Ï¯Í´Ó¨Ú¹Îà¼©ÍÎà§

ß¹ÍÍÎÎÍ¢É» VSENSE àºà¢ Í·ÛÍÍ´ 0.1ÐF Î·Ï¥ÏÎ¿Î«É¾Î¯Ï¯ÏÏ¯

Î±ÎàªÍÎÍ±Éºß´à¤ªà³¾à¨ºà§´ß¸ÍÏÎÏ§Î»ÍÎÎÍ·Í°ÉºÞ¡à²à¡Îà¹·

ÍÎÍ¢É»

Î³ÏÎ¿ÏÎ¼Î¢Ï¯

LP2996 Í¸ÉºVTT à¥à¾Î TRI-STATE Í´Í¢ÎÎÎ«ÏÎÏ LOW Í·

Î³ÏÎ¿ÏÎ¼Î¢Ï¯àºà¢ Îà¶ÍÍ¯ÍÎÍ¢É»Î³ÏÎ¿ÏÎ¼Î¢Ï¯à®¤Í¸ VTT Í´ AVIN

Îà¯ÍÎà°¿Ñ¹Îà¼©ÍÍ¯Í¸Í³ÎÎÍ¤ÎÉ»Î³ÏÎ¿ÏÎ¼Î¢Ï¯àºà¢ Î LOW Í´

Í Í¨à§ß¹ÉºLP2996 Í·à¬´à£Ø»à¦«à¶à°¿à½¶Í¸Ô¼ÍÎÎÍ¢ÍÉºVDDQ Í·

Î Ï¯ÏÊÎ¼Ï¯ÎµÍ¸à²ºà·¦Ï¦ÏÎÏ¨Ï¯Îµà°¿Ñ¹Í·à©à©Í·Í¨ÎÍ´100kÐÍ°Ò°

à°Í°Í¢É» Í¦Í·Í¨ÎÉºÎ³ÏÎ¿ÏÎ¼Î¢Ï¯à£Í·à«¯à°¿à¾à¬à£¦Í·Í°à¢ÜÍ¸Éº

à¾à¹Í·à°¿à½¶ ( à¬´à£Ø»à¦«à¶à°¿à½¶Í±VDDQÎà½¶ÎÎà°¿à½¶ )Îßà¾Í¢

Îà¶à½ÍÍÎÎÍ¢É» à§à¡Í¸Ê®à¹à³¤Ê¯Í·ß²Îà¢à¦°Í Í¯ÍÍ©ÍÍÉ»

Î³ÏÎ¿ÏÎ¼Î¢Ï¯àºà¢ Í¸à²ºà·¦Í°ÏÏ§ÎÎ¿ÏÍÎÍ¯ÍÎÍ¨ÎÉºÏÏÎ ÎµÎ

Î»ÊÏ¯Î¦Ï¯Í¢Îà§ß¹Í¸Î³ÏÎ¿ÏÎ¼Î¢Ï¯àºà¢ Î AVIN Í´àªà¬Í¢ÎÍÖ

à¹Í´Í ÎÍ¢É»

VREF

VREF Í¸à²ºà·¦Ï¦ÏÎÏ¨Ï¯Îµà°¿Ñ¹ VDDQ/2 Í·ÏÎ¿ÏÎà¥à¾Í°Í¢É»àºà¥

à¾Í¸ÉºÏÊÎµÏÏ¦Î¿Î´É¾Î½Î¿ÏÎ·Î¿ÏÍ±ÏÏÏ¦Í´à¬°Í¢ÎÏ¦ÏÎÏ¨Ï¯Îµà°¿

Ñ¹Í±Í Í¯à¢à¼»Í ÎÍ¢É»à¯¨à§Í¦ÎÎÍ·à³à¾Í·Î Ï¯ÏÊÎ¼Ï¯ÎµÍ¸ß´ÍÍ·

Í°ÉºVREF àºà¢ Îà½¶ÎÎà°¿à½¶Í¸ÎÍ£ÍÍ°Í¢É»ÏÎ Î¶à¬°à¡¦Í±Í Í¯àº

à¢ ÛÍÍ´ÏÎ ÏÎµÉ¾Î¯Ï¯ÏÏ¯Î±ÎàªÍÎÍ±ÉºÏ¨ÎªÏ¡Ï¨ÊÎ³Ï£Ï¯à©à³³Í

Õ¾àª³ÍÎÎÍ¢É»à¨ªà¦à¶¼Í¸ 0.1ÐF ÍÎ 0.01ÐF Í·Î·Ï¥ÏÎ¿Î«É¾Î¯Ï¯Ï

Ï¯Î±Í°Í¢É» VREF à¥à¾Í¸ÉºSuspend-to-RAM Ø»à³³ÎÎ±ÏÊÏÍ¢Î

Í¨ÎÉºÎ³ÏÎ¿ÏÎ¼Î¢Ï¯à£ÍÎÍ¼Î±ÊÏÏ§É¾Î³ÏÎ¿ÏÎ¼Î¢Ï¯à£ÎÎÎ«ÏÎÏ

à§à¬¶ÎÒ¡à£Í ÎÍ¢É»

VTT

VTTÍ¸ÏÎµÍ·Î»ÊÏÏÊÎ³Ï£Ï¯à°ßÍ´à¼©ÍÎÎÎÏ¨ÎªÏ¡Ï¨ÊÏà°¿Ñ¹à¥

à¾Í°Í¢É» VDDQ/2 à°¿Ñ¹Í´ß´Íà©à±Í°à¯¥à¥Í Éºà¸Í¤Í¯à°¿à½¶Î¹ÊÎµ

Í±à°¿à½¶Î³Ï¯Î«Í·à³³à¾Îà¶ÍÍ¯ÍÎÍ¢É»LP2996 Í¸Éºß´à¬Ô à±´Í´ÎÍ¬

Í¯à ·àÊ¶ 3AÎÍ°Í·ÏÊÎ«à°¿à½¶à¸¡à²Í´à¬°Ô Í°ÍÎÎÍÍ´àªÍÜÎÍ¯

ÍÎÍ¢É»à ·àà¿à¬à°¿à½¶Í¸ VIN Í·Øà¨ºÍ°ÉºÊ®àà¶¯à°¤Í³à©à³³à²à©Ê¯

Íà¡ÙÍ´ÎÍ¯ÍÎÍ¢É»à ·àà¿à¬à°¿à½¶à°Ö¨Îà¯ÍÎà¸¡à²Íà¯à£Ø

Í´ÎÍ¨ÎÎà ÝÎÎÍ·Í°ÍÎÍ¹Éºà¥à¾Î¯Ï¯ÏÏ¯Î±à¼°à¾Îà¥à·¼àÍ

ÍÍ Í¯Õ¡à±Í·à°¿Ñ¹à¯¿Ô¼Í·àµà©Îà¹·ÍÍ°ÍÍ©ÍÍÉ»LP2996 Í¸à¥à¾

à°¿à½¶Í·àÍÍ³à¸¡à²Í´Îà¬±Íà²ÎÎÍÍ´àªÍÜÎÍ¯ÍÎÍ¢ÍÉºÍ¢Î

Í¯Í·à§ÝÍ·ÎÍ±Í°ÉºÍ¦Í·ÎÍÍ³à§Í´Ú¯à¯à£Øà¬°Ô Í¢ÎÍ·Í¸à à³Í°

Í¢É»Í¦Í·à½§à¼Í¸Éºà¦ÜÍ·à¶ªà¥ªÏÎ¿ÎÊÎ´Îà ¾à¼»Í Í¯ÍÎÍ¨ÎÉºÕ¡

àÍ³à²ºà·¦à°¿à¾à¬à£¦Í´ÎÍ¬Í¯à©Í¡Îà³¤Îà²ÍÍ¤Í³ÍÍ¨ÎÍ°Í¢É» à¯

à£ØÍ´ÎÍ¨Îàà°¿à½¶ÍÙ»ÎÎÎÎà§ß¹Í¸Éºà ·ààªß¹à·¦Ô¹à±Îà¯

ÍÍ³ÍÎÍÍ´à®«ÒÍà¶à½Í°Í¢É» à³¤Í´Ô Í¡Í¯Éºà¢à¼»à°Ö¨Îà°¦à©¾Í´

Ô¼ÍÎÎÍÍ´Í Í¯ÍÍ©ÍÍ (Ê®à¹à³¤Ê¯Îà¢à¦° )É»àªß¹à·¦Ô¹à±ÍÎ±Ê

ÏÏ§É¾Î³ÏÎ¿ÏÎ¼Î¢Ï¯É¾ÏÎ Ï¯ÏÎà¯ÍÎÍ±ÉºÏÎ³ÏÏ¦Î³ÎµÎà£ÍÏÏ¦Î¿

ÏÉ¾ÏÎ Ï¯ÏÔ¹à±ÎÔ¼Õ³ÎÎÍ°ÉºVTT Í¸ TRI-STATE Í±Í³ÎÎÍ¢É»

à·¦à¶¼Í·àª¬à

à³à¾Î¯Ï¯ÏÏ¯Î±

LP2996 Í¸Éºà³à¾Òà°Ô½Îà»¨à°¤Í±Í¢Îà³à¾Î¯Ï¯ÏÏ¯Î±Í¸à¶à½Í°Í¸

ÍÎÎÍ¤ÎÉ»Í¨Í©Í àÍÍ³à·Õà¸¡à²à£Í´à³à¾à°¿Ñ¹Í·à¯¿Ô¼Îà¹·ÍÍ¨

ÎÍ´Éºà³à¾Î¯Ï¯ÏÏ¯Î±Í·à¢à¼»Îà¨ªà¦Í ÎÍ¢É» à³à¾Î¯Ï¯ÏÏ¯Î±Í¸Éº

Õà³³Í³Ý¶Î PVIN Í·ÛÍÍ´à´à®Í ÎÍ¢É»ÎÏÏ¦ÎÊÎ³Ï£Ï¯Í·à½ÝÍ´

ÎÍ¬Í¯à¨ªà¦à§ÝÍÒÍ³ÎÎÍ¢É»ÎÏ§Ïà°¿Õ²Î¯Ï¯ÏÏ¯Î±Îà¼»ÍÍ¨à§

ß¹Éºà¨ªà¦à¼°à¾Í¸ 50ÐF Í°Í¢É»Î·Ï¥ÏÎ¿Î«É¾Î¯Ï¯ÏÏ¯Î±Îà¼»ÍÎà§ß¹

Í¸Éºà¼°à¾Í¸ 10ÐF àª²Í Í±ÞÉºà¼ à°¿à¬®Í·Ô¹à±à²à©Í X5R Òà§Í·

Î¯Ï¯ÏÏ¯Î±Íà½§à«à°¤Í±ÍÍÎÍ¢É»Í³ÍÉºLP2996 Í 2.5V DC-DC

Î¯Ï¯ÏÊÎ»Í·à¥à¾Î¯Ï¯ÏÏ¯Î±Í·ÛÍÍ´Ï¨Î ÎÎ¢ÏÍÎÍ¯ÍÎà§ß¹Í¸Éº

à³à¾Î¯Ï¯ÏÏ¯Î±Îà¦²à½´Í Í¯ÎßÍÎÍ¤ÎÉ» 2 Ü¥à±·Í·à°¿Ý¯Ï¨ÊÏ§

(AVIN Í± PVIN) Îà¢à¼»Í¢Îà§ß¹ÉºPVIN àºà¢ Í·Õà³³Í³Ý¶ÎÛÍÍ´

47ÐF Î¯Ï¯ÏÏ¯Î±Îà´à®Í Í¯ÍÍ©ÍÍÉ»ÎÍ¨ÉºÏÏÎ ÎµÍ´Õ¡à±Í·ÏÎ

Î¶ÍÎ§Î¿ÏÏ¦Ï¯Î¬Í Í³ÍÎÍÉºAVIN àºà¢ Í´ 0.1ÐF Î·Ï¥ÏÎ¿Î«É¾Î¯Ï¯Ï

Ï¯Î±Îà¯¥ÕÍ Í¯ÎßÍÎÍ¤ÎÉ»

9

www.national.com/jpn/

▷