AMC3202DMF

TIGER ELECTRONIC CO.,LTD 1 .5A 280kHz B oost R egulators A MC 3202 DMF D ESCRIPTIONS ： T he A MC 3202 is a 280kHz switching r egulator with a high efficiency , 1.5A i ntegrated switch. The part operates over a w ide input voltage range, from 2 .7V to 3 0V. The A MC 3202 utilizes current mode a rchitecture, which allows excellent load a nd line regulation, as well as a practical m eans for lim iting current. Com b ining high f requency o peration with a highly i ntegrated r egulator circuit results in an extrem ely c om p act power supply s olution. O utline Drawing: AMC3202DMF B uild-in therm a l protection to prevent the chip over heat dam a ge. F E AT U R E S I ntegrated Power Switch: 1.5A Guaranteed. W ide Input Range: 2.7V to 30V. 4 0V Power Switch Input Voltage. H igh Frequency A llows for Sm all Com ponents. M inim u m E xternal Com ponents. B uilt in Over Current Protection. A PPLICATION T FT-LCD Power Managem e nt L CD Monitor/TV LED Backlight Driver 1/6 AMC3202DMF B LOCK DIAGRAM A ND PI N CO NFIGURATION P IN DESCRIPTION P in No. 1 2 3 4 5 6 7 8 P in Nam e COMP FB NC EN Vcc AGND PGND Vsw P in Function Loop compensation pin. This pin is the output of the error amplifier and is used for loop compensation.Loop compensation can be implemented by a simple RC network. F eedbac k p i n. Sens e t h e o u t put v olt a ge a n d reference d t o 1 . 27 6 V . W hen th e vol tage at thi s p in f a lls bel o w 0.4V,c hip s witching-frequency reduces to a m u ch lower frequency. N o connection.Keep floating. E nable pin. A TTL low will shut down the chip and high enable the c hip. This pin m a y a lso be used to sy nchronize the part to nearly t wice the base frequency . I f sy nchronization is not used, this pin s hould be either tied high or left floating for norm a l operation. I nput power supply p in. Supply p ower t o the IC and should have a b ypass capacitor connected to AGND A nalog g ro und. P rovi de a c lea n g rou nd fo r the c o n t roller c i rcui try a nd s hou ld n ot b e i n t h e pa th o f l arge c u rrents.This p i n is c onn ec ted t o the IC substrate. P ower ground. Th is pi n is the g roun d co nne ctio n for the em itter o f t he p ower s witchin g t r ansistor.C onne cti o n t o a g ood g r ound p l an e is e ssential. H igh current switch pin. Connect to the collector of the internal p ower switch. The open voltage acr oss the power switch can be as h igh as 40V. To m i nim i ze radiation, u se a trace as short as practical. 2/6 AMC3202DMF A BSOLUTE MAXIMUM RATINGS ( Ta=25 ° C) Characteristic Input Vo ltage S witch Input Vo ltage, M axim u m O perating Junction Te m p erature S t orage Te m p erature L ead Te m p erature(Soldering,10seconds) Symbol V cc V sw Tj Ts tg Va l u e 30 40 1 50 - 65 ～ +150 2 60 U nit V V °C °C °C * E xceeding these ratings could cause dam a ge to the device. All voltages are with respect t o Ground. Currents are positive into, negative out of the specified term inal. E LECTRICAL C HARACTERISTICS ( Unless otherwise noted: 2.7V