MIL-PRF-19500/463K
4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for
subgroup testing in table E-VII of MIL-PRF-19500, and as follows. Electrical measurements (end-points) and delta
requirements shall be in accordance with table I, subgroup 2 herein.
Subgroup
Method
Condition
C2
2036
Tension - test condition A; weight = 10 pounds (4.54 Kg), t = 15 s;
lead fatigue = condition E (not applicable to `UR' suffix types).
RθJL at L = .375 inch (9.52 mm) ≤ 250°C/W, RθJEC at L = 0 lead length ≤ 100°C/W,
C5
3101
see 4.5. RθJEC = 100°C/W (maximum) at zero lead length (for UR).
or 4081
VPOV = Col 11, table II; TA = +25°C; L = .375 inch (9.53 mm) (non-surface mount),
C6
1026
L = 0 inch for surface mount.
C7
4.5 Thermal resistance. Thermal resistance measurement shall be in accordance with method 3101 of
MIL-STD-750. Forced moving air or draft shall not be permitted across the device during heat. The maximum limit
for RθJL under these test conditions shall be RθJL (max) = 250°C/W or RθJEC = 100°C/W. The following conditions
shall apply:
a.
IH
200 mA to 400 mA .
b.
IM
1 mA to 10 mA.
c.
tH
30 seconds minimum.
70 µs maximum.
d.
tMD
4.5.1 For initial qualifications and re-qualifications. Read and record data in accordance with 4.7.4 herein and
shall be included in the qualification report.
4.6 Temperature coefficient of regulator current. The temperature coefficient of regulator current shall be tested
under the following conditions: Sampling plan: 22 devices, c = 0.
Test 1: VS = 25 V dc, TL1 = -55°C, TL2 = +25°C, L = .375 inch (9.53 mm) (non-surface mount), L = 0 inch
a.
(surface mount) (see 3.3 and 4.7.3) with the maximum limit in accordance with column 8 of table II herein.
Test 2: VS = 25 V dc, TL1 = +25°C, TL2 = +150°C, L = .375 inch (9.53 mm) (non-surface mount), L = 0 inch
b.
(surface mount) (see 3.3 and 4.7.3) with the maximum limit in accordance with column 9 of table II herein.
4.7 Methods of inspection. Methods of inspection shall be as specified in the appropriate tables and as follows:
4.7.1 Regulator impedance (ZS) at test voltage VS. To test for ZS, a 90 Hz signal VS (mod) with rms value equal
to 10 percent of test voltage, VS, is superimposed on the test voltage (see the regulator impedance test circuit figure
herein).
4.7.2 Knee ac impedance (Zk) at test voltage VK. To test for Zk, a 90 Hz signal VK (mod) with rms value equal to
10 percent of test voltage, VK, is superimposed on the test voltage (see the knee impedance test circuit figure
herein).
11
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