ECRI Microelectronics

HNSX5S Military Point of Load DC to DC converters (POL)

1 Features of HNSX5S Point of Load DC DC Converters (POL)

High reliability   
HNSX5S Point of Load DC DC Converters (POL)
Low voltage input:4.5V~5.5V,Typical 5V
High conversion efficiency
Output Power PO:5.2W
Operating temperature Tc:-55℃~+125℃
Low start-up current
No output overshoot
Inhibit function
Output over current and short circuit protection
Maximum power density:34W/in3
Hermetically sealed metal case


2 Scope of application of HNSX5S Military Point of Load DC to DC converters (POL)

High-reliability electronic system for ground ,vehicle,radar,aviation and aerospace, etc.


3 Description of HNSX5S Military Point of Load DC to DC converters (POL)

HNSX5S1R3 is a high reliable, output voltage adjustable non-isolated DC to 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 0.9V~1.3V adjustable.. The series of products are made by thick-film hybrid integrated production process, metal sealed package. The design and manufacturing process of HNSX5S1R3 Series converters are in compliance with MIL-PRF-38534.

4 Technical Specifications of HNSX5S Military Point of Load DC to DC converters (POL)

Table 2 Rated conditions and recommended operating conditions

Absolute Max. Rating

Input voltage:4.5V~5.5V

Input voltage(Transient,1s):6V

Output Power:5.5W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead solderable temperature:300℃(15s)

Weight:12g



Table 3 Electrical characteristics

NO.

Items

Conditions

(Unless other wise,

-55℃≤Tc≤125℃,

VIN=5V±0.15V)

HNSX5S1R3

Min

Max

1

Input voltage/V

Low、high and room temperature

4.5

5.5

2

Output voltage /V

Full load,Low、high and room temperature

0.86

0.94

0.96

1.04

1.25

1.35

3

Output current /A

VIN=4.5V~5.5V

4

4

Output power/W


0

5.2

5

Output ripple voltage/mV

Vo=1.0V,IO=4A,BW=6MHz

30

6

Voltage regulation/mV

VIN=4.5V~5.5V,Vo=1.0V,IO=4A

30

7

Load regulation /mV

Vo=1.0V,IO=0→4A

30

8

Efficiency /%

Vo=1.0V,IO=4A

70

9

Insulation resistance /MΩ

TA=25℃,impose 500V DC voltage between case and any pin

500

10

Inhibit off voltage /V

Vo=1.0V,IO=4A

0

0.8

11

Inhibit on voltage /V

Vo=1.0V,IO=4A

2.4

-

12

Inhibit current/mA

TA=25℃,Vo=1.0V,IO=4A,Inhibit connect ground

-

10

13

Protection function/s

TA=25℃,Vo=1.0V

-

2

14

Undervoltage open voltage/V

TA=25℃,Vo=1.0V,IO=4A

2.4

4.3

15

Undervoltage shutdown voltage/V

TA=25℃,Vo=1.0V,IO=4A

2.2

3.7

16

Input surge voltage/V

Vo=1.0V,IO=4A

-

6

17

Capacitive load/μF

Vo=1.0V,IO=4A,no effect on DC parameters

1000

18

Switching frequency/kHz

Vo=1.0V,IO=4A

600

750

19

Step Load Response Transient(Peak)/mV

Vo=1.0V,IO=2A→4A或IO=4A→2A

300

20

Step Load Response Recovery /μs

Vo=1.0V,IO=2A→4A或IO=4A→2A

200

21

Start-up Overshoot(peak)/mV

Input voltageVIN:0→5V,Vo=1.0V,IO=4A

50

22

Start-up Delay /ms

Input voltage VIN:0→5V,Vo=1.0V,IO=4A

5


5 Circuit block diagram of HNSX5S Military Point of Load DC to DC converters (POL)

fig-2-hnsx5s1r3-circuit-block-diagram
Fig 2 HNSX5S1R3 circuit block diagram

6 Typical Characteristic Curve (Unless otherwise specified,Testing condition as per Tc=25℃,VIN=5V±0.15V, Vo=1.0V,full load.) of HNSX5S Military Point of Load DC to DC converter (POL)



Fig 3 HNSX5S1R3 Efficiency

Fig 4 HNSX5S1R3 Load


fig-5-hnsx5s1r3-overshoot-start-up-delay
Fig 5 HNSX5S1R3 Overshoot/Start-up Delay

7 MTBF Curve of HNSX5S Military Point of Load DC to DC converter (POL)

fig-6-mtbf-temperature-curve
Fig 6  MTBF Temperature Curve(HNSX5S1R3)
(Ground good condition is expected)

8 Pin Designations of  HNSX5S Military Point of Load DC to DC converter (POL)


Figure 7 Bottom View


Table 4 Pin Designation

Pin

Symbol

Designation

1

GND

Common ground

2

VIN

Input

3

INH

Inhibit

4

Trim

Output trimming

5

Vo

Output

9 Typical Connection Diagram of HNSX5S Military Point of Load DC to DC converter (POL)


fig-9-high-level-inhibit-drive-circuit
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)

1.3

20.3

1.2

27.7

1.1

42.5

1.0

87.1

0.9

None


Fig 9  High level inhibit drive circuit


10 Package Specifications of HNSX5S Military Point of Load DC to DC converter (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

-

-

8.50

фb

0.87

1.00

1.13

D

-

-

22.50

E

-

-

15.50

e

2.88

3.18

3.48

e1

15.58

15.88

16.18

e2

9.22

9.52

9.82

L

5.20

-

-


Table 6  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing

Notes

UPP2215-05

Cold Rolled Steel

(10#)

Ni

Kovar(4J42)

Ni

Copper –core Compound

Au

Parallel seam welding



11 Ordering Information of HNSX5S Military Point of Load DC to DC converter (POL)



Fig 10  Part Numbering Key

Application Notes:
☆  According to user needs,customized 0.9V~3.3V any output voltage.
☆  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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