Rev 390 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
88 | jelle | 1 | Manufacturer: STMICROELECTRONICS |
2 | Order Code: 1202824 |
||
3 | Manufacturer Part No: LD1117STR-E |
||
257 | jelle | 4 | Description: V REG ADJ +1.25/15V, SMD, 1117 |
270 | jelle | 5 | Supplier: http://nl.farnell.com/stmicroelectronics/ld1117str-e/v-reg-adj-1-25-15v-smd-1117/dp/1202824 |
257 | jelle | 6 | Datasheet: http://www.st.com/stonline/products/literature/ds/2572/ld1117xx.pdf |
390 | jelle | 7 | Datasheet: http://www.st.com/stonline/books/pdf/docs/2572.pdf |
8 | Catalogue Page: 545 / EBU |
||
9 | Price: € 1,32 |
||
88 | jelle | 10 | |
390 | jelle | 11 | ------------------------------------------------------------------------ |
12 | |||
406 | jelle | 13 | page 28 of datasheet |
14 | |||
390 | jelle | 15 | Case Style: SOT-223 |
16 | |||
17 | SOT-223 |
||
18 | |||
406 | jelle | 19 | SOT23 & SOT223 Packages (Example: SOT230P700X180-4) |
20 | SOT + Pitch P + Lead Span Nominal X Height - Pin Qty |
||
390 | jelle | 21 | |
406 | jelle | 22 | SOT230P530X700-4__ST_LD1117SXX_SOT223 |
23 | |||
390 | jelle | 24 | ------------------------------------------------------------------------ |
25 | |||
291 | agaran | 26 | ;VOUT = VREF (1 + R2 / R1) |
27 | ; |
||
28 | ;VREF = 1.25V |
||
29 | ; |
||
30 | ;# notes |
||
31 | ; |
||
32 | ;The power dissipated by the device will be equal to: |
||
33 | ; IOUT(MAX)(VIN(MAX) – VOUT) + IGND(VIN(MAX)) |
||
34 | ;where, |
||
35 | ; IOUT(MAX) = 250mA |
||
36 | ; VIN(MAX) = 6V |
||
37 | ; IGND at (IOUT = 250mA, VIN = 6V) = 5mA |
||
38 | ;So, |
||
39 | ; P = 250mA(6V – 3.3V) + 5mA(6V) = 0.71W |
||
40 | ; |
||
41 | ;page 7: Thermal resistance junction-case: 14 C/W |
||
42 | ; |
||
43 | ; |
||
44 | ;=== 3.0 V ==== |
||
45 | ; |
||
46 | ;R1 = 220 |
||
47 | ;R2 = 330 |
||
48 | ; |
||
49 | ;VOUT = VREF (1 + R2 / R1) |
||
50 | ;3.000 = 1.25 * (1 + 280 / 200) |
||
51 | ;2.969 = 1.25 * (1 + 330 / 240) |
||
52 | ;3.125 = 1.25 * (1 + 330 / 220) |
||
53 | ; |
||
54 | ;( (VOUT / VREF) -1 ) = (R2 / R1) |
||
55 | ; |
||
56 | ;I = U / R |
||
57 | ;3 / 200 = 0.015 |
||
58 | ; |
||
59 | ;P = I * U |
||
60 | ; |
||
61 | ;0.015 * 3 = 0.045 W |
||
62 | ;0603 Case Size = 0.063 W |
||
63 | ; |
||
64 | ; |
||
65 | ;=== 3.3 V === |
||
66 | ; |
||
67 | ;R1 = 240 |
||
68 | ;R2 = 390 |
||
69 | ; |
||
70 | ;VOUT = VREF (1 + R2 / R1) |
||
71 | ;3.281 = 1.25 * (1 + 390 / 240) |
||
72 | ; |
||
73 | ;== +3.0V Limits == |
||
74 | ; |
||
75 | ;VOUT = VREF (1 + R2 / R1) |
||
76 | ;R1 = 240 |
||
77 | ;R2 = 330 |
||
78 | ;R1 = 99% = 237.6 |
||
79 | ;R1 = 101% = 242.4 |
||
80 | ;R2 = 99% = 326.7 |
||
81 | ;R2 = 101% = 333.3 |
||
82 | ; |
||
83 | ;MIN(2.940) = 1.238 * (1 + 326.7 / 237.6) |
||
84 | ;TYP(2.969) = 1.250 * (1 + 330.0 / 240.0) |
||
85 | ;MAX(3.004) = 1.262 * (1 + 333.3 / 242.4) |
||
86 | ; |
||
87 | ;== +3.125 V Limits == |
||
88 | ; |
||
89 | ;VOUT = VREF (1 + R2 / R1) |
||
90 | ;R1 = 220 |
||
91 | ;R2 = 330 |
||
92 | ;R1 = 99% = 217.8 |
||
93 | ;R1 = 101% = 222.2 |
||
94 | ;R2 = 99% = 326.7 |
||
95 | ;R2 = 101% = 333.3 |
||
96 | ; |
||
97 | ;MIN(3.095) = 1.238 * (1 + 326.7 / 217.8) |
||
98 | ;TYP(3.125) = 1.250 * (1 + 330.0 / 220.0) |
||
99 | ;MAX(3.115) = 1.262 * (1 + 333.3 / 222.2) |
||
100 | ; |
||
101 | ;3.125 = 1.25 * (1 + 330 / 220) |
||
102 | ; |
||
103 | ; |
||
104 | ;== +3.3V Limits == |
||
105 | ; |
||
106 | ;VOUT = VREF (1 + R2 / R1) |
||
107 | ;R1 = 240 |
||
108 | ;R2 = 390 |
||
109 | ;R1 = 99% = 237.6 |
||
110 | ;R1 = 101% = 242.4 |
||
111 | ;R2 = 99% = 386.1 |
||
112 | ;R2 = 101% = 393.9 |
||
113 | ;MIN(3.250) = 1.238 * (1 + 386.1 / 237.6) |
||
114 | ;TYP(3.281) = 1.238 * (1 + 386.1 / 237.6) |
||
115 | ;MAX(3.313) = 1.262 * (1 + 393.9 / 242.4) |