ECRI Microelectronics

HNHX0503S Military Point of Load DC to DC Converters (POL)

1 Features of HNHX0503S Military Point of Load DC/DC Converters (POL)

High reliability 

Low voltage input:4.0V~5.5V,Typical 5V
High conversion efficiency
Output Power PO:10W
Operating temperature Tc:-55℃~+125℃   
Low start-up current
No output overshoot   
Inhibit function   
Output over current and short circuit protection
Maximum power density:78W/in3
Hermetically sealed metal case


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


Table 3 Electrical characteristics

Items

Sym

Conditions

( Unless other wise,

VI=5V±0.25V,-55℃≤TC≤125℃)

A Group

Limited

Unit

Min

Max

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

RI

TA=25℃, impose 500V DC voltage between case and any pin (Expect pin 3)

1

100

-

Short circuit power consumption

PD

Output short

1,2,3

-

4

W

Capacitive load

ab

CL

TA=25℃,Vo3=3.3V,Io=3A

4

-

5000

μF

switching frequencyb

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


5. Circuit block diagram of HNHX0503S Military Point of Load DC to DC Converters (POL)

fig-2-hnhx0503s-circuit-block-diagram

Fig 2 HNHX0503S circuit block diagram

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 3 HNHX0503S Efficiency

fig-4-hnhx0503s-load
Fig 4 HNHX0503S Load

fig-5-hnhx0503s-overshoot-start-up-delay
Fig 5 HNHX0503S Overshoot/Start-up Delay

7. MTBF Curve of HNHX0503S Military Point of Load DC to DC Converters (POL)

Fig 6  MTBF Temperature Curve(HNHX0503S)
(Ground good condition is expected)

8. Pin Designations of HNHX0503S Military Point of Load DC to DC Converters (POL)

figure-7-bottom-view

Figure 7 Bottom View

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
C1=100μF;C2=10μF;C3=0.1μF   C1、C2、C3 are chip capacitors
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
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)

fig-10-bottom-view-and-side-view

Fig 10  Bottom View and Side View

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.


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)


fig-11-part-numbering-key
fig-11-part-numbering-key-1

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.

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