QD8251AD Datasheet| 1 | | | l | j | | | | I LIUU 1480 | | | | | | | c | | ' 1 4 60 | | | | | | d | | | | . 1440 | | | | | | | | | 1420 | | | | d | | | | 75 0C | | . 1 4 00 | | | c | | | | | | ,-- 1 380 | | | | r | | | | 1 25 0C - -25 0C | | . 1360 | j | F_ | | | | | | | . | | r | | | | | | | 1340 1 qon | r7 | | | | | | | | 0 0.4 0.8 1.2 1.6 2 2.4 2.8 | | | | ) | | 1 | | | | | | | | | | 0 | | | | | | | | | --l | k - | | | | | | | -1 -2 | | | | - | | | | | | | | _ | k1 | k | | 25 0C | | | | | | | 1 | k | | : .' 4 l . -5 | | | | | | | | | | | | | | | | | 1347 1368 1387 1405 1424 1443 1463 1484 | | | | 0.CHMENTF IHE VCOTAIA'LW | NOJES: 1, JHE lNSIDE RADIUS OF tALL 8 HALF HOLES AT JHE PERIMETER OF JHE BOARD ARE GEILD PLAJED JO PROVIDE A SURFACE | | l _/-SEE DETA[L'F ¨ MEJJHERBOARD, IN8 LOCAJIONS, ViIJH a n nl n | | I \_/ I | | INTERFACE. SOLDER LOCAJIONS REOUIRED | | 0.341 Pl-/ F: | Lrv kC rLHLLbi , JHE SURFACEF JHE SHIELD IS TIN PLATED DETAIL B AND MAY BE SLDERED J. THE SHrELDS BASE METAL IS BRt\SS, 1 TLir r:r?Fii IKITi Pl AKir T troFii iF.iri¨n ATTLru | | 0.187 BTJM VIEW C O.r | q L 75 | 0.024 TO A GROUND TRACK ON THE_ UPPER SIDE OF JHE BOARJ) AS w[LL AS THE SHIELD BY PJH, | | | _L r | | / | ARE IN INCHES, -J0.029 0.t5, 0180 5. UNLESS OJHERVISE NOTED ALL -[OLERANCES J KL3 ARE t\S FOLLOWSi | | n. n1 | | L | \ | | Tll FRANCFS | | U,:JO d ' Ir.I iR P2 | X- P - | \ 4- | | ×××=01 0 | | | | - 4- O.L< I 0.0 jA l | TERMIN,4L PADS PL = Vrtiod (pt) PE? = RF Elu | | | | -J Ui \ --' -. | | 34 l l | P:3 = V Tun9 P4 = Vcc | | \-SLDER O.C GROUND PLANE OOLD PLATEDJ MASK u.uuu | | | 1 | | | | | | | | | | | | | | | | | | | | | | |
QD8251AD Price Testing. On power up, all internal counters are reset. Internal test circuitry allows for low battery check by holding pins 8 and 12 low during power up, then reducing VDD and monitoring HORNi (pin 10). All functional tests can be accelerated by driving pin 12 with a 2 kHz square wave. The 10 ms strobe period must be maintained for proper opera- tion of the comparator circuitry. QD8251AD on stock These three terminal negative regulators are supplied in a hermetically sealed metal package whose outline is similar to the industry standard T0-220 plastic package. All protective features are designed into the circuit, including thermal shutdown, current limiting and safe-area control. With heat sinking, they can deliver over 3.0 amps of output current. These units feature 2% initial voltage tolerance, with l.0% load regulation and .015% line regulation. | :.li'l- "Iiii/r!'iil, ;ili | | . . . l . . . i l . I :! . I I I : l I 1 1 ; j I i : l : | | . , I . '[ : . i 1 11 i ! I i I i i l L jFl lI;, | | | | 1} Ir l l lIi t | | } I jj | j | l | l:l | } | | | | | |
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