2. Scope of application of HNHX0503S Military Point of Load DC to DC Converters (POL)
High-reliability electronic system for ground ,vehicle ,radar , aviation and aerospace, etc
3. Description of HNHX0503S Military Point of Load DC to DC Converters (POL)
HNHX0503S point of load DC/DC converters are a high reliable, output voltage adjustable non-isolated DC/DC converter with BUCK circuit topology and pulse width modulation principle. The output sampling voltage is directly feedbacked to modulate the pulse width to achieve closed-loop control to meet the stability of the voltage output requirements. By changing the external resistance method to achieve the output voltage 0.8V-3.3V adjustable.. The series of products are made by thick-film hybrid integrated production process, metal sealed package. The design and manufacturing process of HNHX0503S Series converters are in compliance with MIL-PRF-38534.4. Technical Specifications of HNHX0503S Military Point of Load DC to DC Converters (POL)
Table 2 Rated conditions and recommended operating conditions
Input voltage：4.0V～5.5V|
Absolute Max. Rating |
|
|
Input voltage：4.0V～5.5V Input voltage（Transient,1s）：5.8V Output Power：10 W Storage temperature：-65℃～150℃ |
Mechanical Shock：1500g Lead solderalbe temperature：300℃（10s） Weight：8 g
|
|
Items |
Sym |
Conditions （ Unless other wise， VI=5V±0.25V，-55℃≤TC≤125℃） |
A Group |
Limited |
Unit |
|
|
Min |
Max |
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|
Output voltage |
Vo1 |
IO=3A |
1,2,3 |
0.770 |
0.830 |
V |
|
Vo2 |
IO=3A |
2.435 |
2.565 |
|||
|
Vo3 |
VI=4.0V～5.5V，IO=3A |
3.215 |
3.385 |
|||
|
Output current |
Io |
Vo1=0.8V，VI=5.0V Vo2=2.5V，VI=5.0V Vo3=3.3V，VI=4.0V～5.5V |
1,2,3 |
- |
3 |
A |
|
Output ripple voltage （Peak-peak） |
VR |
Vo3=3.3V，IO=3A，OscilloscopeBW=20MHz |
1,2,3 |
- |
90 |
mV |
|
Current regulation |
SI |
Vo3=3.3V，IO=0→3A |
1,2,3 |
- |
40 |
mV |
|
Input current |
II |
No load，Vo3=3.3V， Inhibit connect Input Ground |
1,2,3 |
- |
3 |
mA |
|
No load，Vo3=3.3V， Inhibit open |
1,2,3 |
- |
45 |
|||
|
Efficiency |
η |
Vo3=3.3V，Io=3A |
1,2,3 |
86 |
- |
% |
|
Inhibit voltage |
VINH |
With inhibit voltage， output voltage is inhibition |
1,2,3 |
0 |
0.2 |
V |
|
Insulation resistance |
TA=25℃， impose 500V DC voltage between case and any pin (Expect pin 3) |
1 |
100 |
- |
MΩ |
|
|
Short circuit power consumption |
PD |
Output short |
1,2,3 |
- |
4 |
W |
|
ab |
CL |
TA=25℃，Vo3=3.3V，Io=3A |
4 |
- |
5000 |
μF |
|
fs |
Vo3=3.3V，Io=3A |
4,5,6 |
240 |
350 |
kHz |
|
|
Step Load Response Transient bc（Peak） |
VLT |
Vo3=3.3V，IO=1.5A→3A或IO=3A→1.5A |
4,5,6 |
- |
350 |
mV |
|
Step Load Response Recovery bcd |
tLT |
Vo3=3.3V，IO=1.5A→3A或IO=3A→1.5A |
4,5,6 |
- |
400 |
μs |
|
Start-up Overshoot（peak） |
VTO |
Output voltageVI：0→5V，Vo3=3.3V，IO=3A |
4,5,6 |
- |
70 |
mV |
|
Start-up Delay |
tTR |
Output voltageVI：0→5V，Vo3=3.3V，IO=3A |
4,5,6 |
- |
10 |
ms |
|
a Capacitive load may be any value from 0 to the maximum limit without compromising DC performance b This parameter shall be guaranteed by design and tested only when there is qualification test and design or process change. c Load step transition time shall be large than 15μs； d Recovery time means that step starts until output voltage comes back to the corresponding ±1%； e Start up delay time measurement is for a step application of power at the input while power is applied to the input |
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5. Circuit block diagram of HNHX0503S Military Point of Load DC to DC Converters (POL)
6. Typical Characteristic Curve (Testing condition as per Tc=25℃， VIN=5V±0.15V, Vo=3.3V，full load. unless otherwise specified) of HNHX0503S Military Point of Load DC to DC Converters (POL)
Fig 3 HNHX0503S Efficiency
Fig 4 HNHX0503S Load
Fig 5 HNHX0503S Overshoot/Start-up Delay
7. MTBF Curve of HNHX0503S Military Point of Load DC to DC Converters (POL)
（Ground good condition is expected）
8. Pin Designations of HNHX0503S Military Point of Load DC to DC Converters (POL)
Table 4 Pin Designation
|
Pin |
Symbol |
Designation |
Pin |
Symbol |
Designation |
|
1 |
Vo |
Positive output |
4 |
VI |
Positive input |
|
2 |
GND |
Common GND |
5 |
INH |
Inhibit |
|
3 |
GNDC |
Case ground |
6 |
Trim |
Output Trimming |
9. Typical Connection Diagram of HNHX0503S Military Point of Load DC to DC Converters (POL)
Fig 8 Connection Diagram
In fig 8，By adjusting the external resistor Rtr，can achieve different output voltage，Rtr and VO relationship is shown as follow：
|
Vo（V） |
Rtr(kΩ) Reference |
|
3.3 |
3.3 |
|
2.6 |
6.55 |
|
2.5 |
7.25 |
|
0.8 |
None |
Fig 9 Inhibit Driver Circuit Diagram
The start-up delay (roughly 5ms when C=0.01uF) can be enlonged by adjusting the external capacitor.
10. Package Specifications of HNHX0503S Military Point of Load DC to DC Converters (POL)
Table 5 Package Outline
|
Symbols |
Unit/mm |
||
|
Minimum |
Nominal |
Maximum |
|
|
A |
- |
- |
7.20 |
|
Фb1 |
0.35 |
- |
0.55 |
|
Фb2 |
0.63 |
- |
0.89 |
|
D |
- |
- |
18.08 |
|
E |
- |
- |
18.08 |
|
e |
3.43 |
3.73 |
4.03 |
|
e1 a |
- |
10.16 |
- |
|
e2 a |
- |
2.54 |
- |
|
e3 a |
- |
3.81 |
- |
|
e4 |
2.80 |
3.10 |
3.40 |
|
e5 a |
- |
11.43 |
- |
|
L |
5.90 |
- |
- |
|
a e、e1、e2 interchangeability dimensions are guaranteed by the manufacture and inspection of the enclosure，this specification is not required as an assessment. |
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Table 6 Case Materials
|
Case Model |
Header |
Header Plating |
Cover |
Cover Plating |
Pin |
Pin Plating |
Sealing |
Notes |
|
PP1818-06 |
Cold Rolled Steel |
Ni |
Steel (SPCC-SD) |
Ni |
Copper –core Compound |
Au |
Compression |
|
11. Ordering Information of HNHX0503S Military Point of Load DC DC Converters (POL)
Application Notes:
☆ Both positive and negative terminals for power supply shall be correctly connected when power is applied so as to avoid permanent damage to the device.☆ Testing position shall be the root of the pin of the device when the electrical characteristic is measured.
☆ The baseplate of the device shall be closely attached to the circuit board during device mounting so as to avoid the damage on pins. The shockproof actions shall be adopted when necessary.
☆ Pins shall not be bended to avoid the glass insulator cracking and case leaking.
☆ Pins at inhibit terminal shall be hung in the air during no operation.
☆ When ordering this device，the detail electrical specification shall be based on relevant standards. While data offered in this document shall be for reference only.
