Delta Electronics DNT04S0A0S03NFA, DNT04S0A0R03NFA, DNT04S0A0S05NFA, DNT04S0A0R05NFA Specification Sheet

Delphi DNT04, Non-Isolated Point of Load

t

f

FEATURES

 High Efficiency: 94%@ 5Vin, 3.3V/3A out

 Small size and low profile:

0.80” x 0.45” x 0.27” (SMD)

0.90” x 0.40” x 0.25” (SIP)

 Standard footprint and pinout

 Resistor-based trim

 Output voltage programmable from

0.75V to 3.63V via external resistors

 Pre-bias startup

 No minimum load required

 Fixed frequency operation

 Input UVLO, OCP

 Remote ON/OFF

 ISO 9001, TL 9000, ISO 14001, QS 9000,

OHSAS 18001 certified manufacturing

facility

 UL/cUL 60950 (US & Canada) Recognized,

and TUV (EN60950)- pending

 CE mark meets 73/23/EEC and 93/68/EEC-

pending

DC/DC Power Modules: 2.4~5.5Vin, 0.75~3.63Vo, 3A out

The Delphi Series DNT04, 2.4-5.5V input, single output, non-isolated

Point of Load DC/DC converters are the latest offering from a world

leader in power systems technology and manufacturing — Delta

Electronics, Inc. The DNT04 series provides a programmable outpu

voltage from 0.75V to 3.63V via external resistors. This product family is

available in surface mount or SIP package and provides up to 3A o

output current in an industry standard footprint. With creative design

technology and optimization of component placement, these converters

possess outstanding electrical and thermal performance, as well as

extremely high reliability under highly stressful operating conditions.

The DNT04, 3A modules have excellent thermal performance and can

provide full output current at up to 85℃ ambient temperature with no

airflow.

OPTIONS

 Positive On/Off logic

 SMD or SIP package

APPLICATIONS

 Telecom/DataCom

 Distributed power architectures

 Servers and workstations

 LAN/WAN applications

 Data processing applications

PRELIMINARY DATASHEET

DS_DNT04SIP03_09262007

A

TECHNICAL SPECIFICATIONS

(TA = 25°C, airflow rate = 300 LFM, V

PARAMETER NOTES and CONDITIONS DNT04S0A0R03NFA

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Continuous) 0 5.8 Vdc
Operating Temperature Refer to Figure 32 for measuring point -40 125 °C
Storage Temperature -55 125 °C

INPUT CHARACTERISTICS

Operating Input Voltage
Input Under-Voltage Lockout

Turn-On Voltage Threshold 2.1 V

Turn-Off Voltage Threshold 2.0 V
Maximum Input Current Vin=4.5V Vo=3.3V, Io=Io,max 2.5 A
No-Load Input Current 30 45 mA
Off Converter Input Current 1
Inrush Transient Vin=2.4V to 5.5V, Io=Io,min to Io,max 0.1 A2S
Recommended Input Fuse TBD A

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=5V, Io=Io, max -2.0 Vo,set +2.0
Output Voltage Adjustable Range 0.7525 3.63 V
Output Voltage Regulation

Over Line Vin=2.4V to 5.5V 0.3 % Vo,set
Over Load Io=Io,min to Io,max 0.4 % Vo,set
Over Temperature Ta=-40℃ to 85℃ 0.4 % Vo,set

Total Output Voltage Range Over sample load, line and temperature -3.0 +3.0 % Vo,set
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 25 50 mV

RMS Full Load, 1µF ceramic, 10µF tantalum 10
Output Current Range 0 3 A
Output Voltage Over-shoot at Start-up 5 % Vo,set
Output DC Current-Limit Inception 220 % Io
Output Short-Circuit Current (Hiccup Mode) Io,s/c 3 Adc (rms)

DYNAMIC CHARACTERISTICS

Dynamic Load Response 10µF Tantalum & 1µF Ceramic load cap, 2.5A/µs

Positive Step Change in Output Current 50% Io, max to 100% Io, max 220 mV
Negative Step Change in Output Current 100% Io, max to 50% Io, max 220 mV
Setting Time to 10% of Peak Devitation 25 µs

Turn-On Transient Io=Io.max

Start-Up Time, From On/Off Control Von/off, Vo=10% of Vo,set 7 ms
Start-Up Time, From Input Vin=Vin,min, Vo=10% of Vo,set 7

Maximum Output Startup Capacitive Load

EFFICIENCY

Vo=3.3V
Vo=2.5V Vin=5V, 100% Load 92.5 %
Vo=1.8V Vin=5V, 100% Load 90.0 %
Vo=1.5V Vin=5V, 100% Load 88.5 %
Vo=1.2V Vin=5V, 100% Load 87.0 %
Vo=0.75V Vin=5V, 100% Load 81.5 %

FEATURE CHARACTERISTICS

Switching Frequency 300 kHz
ON/OFF Control, (Negative logic)

Logic Low Voltage Module On, Von/off -0.2 0.3 V

Logic High Voltage Module Off, Von/off 2.5 Vin.max V

Logic Low Current Module On, Ion/off 10 µA

Logic High Current Module Off, Ion/off 0.2 1 mA

GENERAL SPECIFICATIONS

MTBF Io=100% of Io, max; Ta=25°C TBD M hours
Weight 2.3 grams

= 2.4Vdc and 5.5Vdc, nominal Vout unless otherwise noted.)

in

Vo ≦ Vin –0.5V

Full load; ESR ≧1mΩ
Full load; ESR ≧10mΩ

Vin=5V, 100% Load 94.0 %

2.4 5.5 V

1000 µF
3000 µF

m

% Vo,set

15

mV

ms

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ELECTRICAL CHARACTERISTICS CURVES

Figure 1: Converter efficiency vs. output current (5Vin/3.3Vout)

Figure 3: Converter efficiency vs. output current (5Vin/1.8Vout)

Figure 2: Converter efficiency vs. output current (5Vin/2.5Vout)

Figure 4: Converter efficiency vs. output current (5Vin/1.5Vout)

Figure 5: Converter efficiency vs. output current (5Vin/1.2Vout)

DS_DNT04SIP3A_09262007

Figure 6: Converter efficiency vs. output current (5Vin/0.75Vout)

3

ELECTRICAL CHARACTERISTICS CURVES (CON.)

Figure 7: Output ripple & noise at 5Vin, 3.3V/3A out, 50mV/div Figure 8: Output ripple & noise at 5Vin, 2.5V/3A out, 50mV/div

Figure 9: Output ripple & noise at 5Vin, 1.8V/3A out, 50mV/div

Figure 11: Output ripple & noise at 5Vin, 1.2V/3A out, 50mV/div

DS_DNT04SIP3A_09262007

Figure 10: Output ripple & noise at 5Vin, 1.5V/3A out, 50mV/div

Figure 12: Output ripple & noise at 5Vin, 0.75V/3A out, 50mV/div

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ELECTRICAL CHARACTERISTICS CURVES (CON.)

Figure 13: Turn on delay time at 5Vin, 3.3V/3A out
Top: Vout, 2V/div, Bottom: Vin, 5V/div; 2mS/div

Figure 15: Turn on delay time at 5Vin, 1.8V/3A out
Top: Vout, 1V/div, Bottom: Vin, 5V/div; 2mS/div

Figure 14: Turn on delay time at 5Vin, 2.5V/3A out

Top: Vout, 2V/div, Bottom: Vin, 5V/div; 2mS/div

Figure 16: Turn on delay time at 5Vin, 1.5V/3A out
Top: Vout ,1V/div, Bottom: 5V/div; 2mS/div

Figure 17: Turn on delay time at 5Vin, 1.2V/3A out

Top: Vout , 1V/div, Bottom: Vin, 5V/div; 2mS/div

DS_DNT04SIP3A_09262007

Figure 18: Turn on delay time at 5Vin, 0.75V/3A out

Top: Vout, 0.5V/div, Bottom: Vin ,5V/div; 2mS/div

5

ELECTRICAL CHARACTERISTICS CURVES

Figure 19: Typical transient response to step load change at

2.5A/µS from 100% to 50% of Io, max at 5Vin, 3.3Vout
(Cout = 1uF ceramic, 10µF tantalum), 0.1V/div

Figure 20: Typical transient response to step load change at

2.5A/µS from 50% to 100% of Io, max at 5Vin, 3.3Vout
(Cout =1uF ceramic, 10µF tantalum), 0.1V/div

Figure 21: Output short circuit current 5Vin, 0.75Vout
20A/div, 10mS/div

Vbias=1V

Figure 22:Turn on with Prebias 5Vin, 3.3V/0A out, Vbias =1.0Vdc
2V/div, 10mS/div

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TEST CONFIGURATIONS

TO OSCILLOSCOPE

L

VI(+)

100uF

BATTERY

2

Tantalum

I

(-)

V

Note: Input reflected-ripple current is measured with a
simulated source inductance. Current is measured at the input
of the module.

Figure 23: Input reflected-ripple test setup

COPPER STRIP

Vo

10uF
tantalum

1uF

ceramic

SCOPE

GND

Note: Use a 10µF tantalum and 1µF capacitor. Scope
measurement should be made using a BNC connector.

Figure 24: Peak-peak output noise and startup transient

measurement test setup.

DISTRIBUTION LOSSES

VIVo

I

I

SUPPLY

GND

Resistive

Load

CONTACT AND

Io

LOAD

DESIGN CONSIDERATIONS

Input Source Impedance

The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the module. An
input capacitance must be placed close to the modules
input pins to filter ripple current and ensure module
stability in the presence of inductive traces that supply
the input voltage to the module.

Safety Considerations

For safety-agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards.

For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power module
has extra-low voltage (ELV) outputs when all inputs are
ELV.

The input to these units is to be provided with a
adequate time-delay fuse in the ungrounded lead.

CONTACT RESISTANCE

Figure 25: Output voltage and efficiency measurement test

setup

Note: All measurements are taken at the module terminals.

When the module is not soldered (via socket), place
Kelvin connections at module terminals to avoid
measurement errors due to contact resistance.

IoVo

×

=

η

DS_DNT04SIP3A_09262007

IiVi

×

%100)( ×

7

−

=

=−×−

=

y

FEATURES DESCRIPTIONS

Remote On/Off

The DNT series power modules have an On/Off pin for
remote On/Off operation. Both positive and negative
On/Off logic options are available in the DNT series
power modules.

For positive logic module, connect an open collector
(NPN) transistor or open drain (N channel) MOSFET
between the On/Off pin and the GND pin (see figure 26).
Positive logic On/Off signal turns the module ON during
the logic high and turns the module OFF during the logic
low. When the positive On/Off function is not used, leave
the pin floating or tie to Vin (module will be On).

For negative logic module, the On/Off pin is pulled high
with an external pull-up resistor (see figure 27). Negative
logic On/Off signal turns the module OFF during logic
high and turns the module ON during logic low. If the
negative On/Off function is not used, leave the pin
floating or tie to GND. (module will be On)

Vin

I

ON/OFF

On/Off

Q1

Figure 26: Positive remote On/Off implementation

Vin

Rpull-

up

I

ON/OFF

On/Off

Q1

Vo

GND

Vo

GND

RL

RL

FEATURES DESCRIPTIONS (CON.)

Over-Temperature Protection

The over-temperature protection consists of circuitry that
provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold
the module will shut down. The module will try to restart
after shutdown. If the over-temperature condition still
exists during restart, the module will shut down again.
This restart trial will continue until the temperature is
within specification.

Output Voltage Programming

The output voltage of the DNT can be programmed to any
voltage between 0.75Vdc and 3.3Vdc by connecting one
resistor (shown as Rtrim in Figure 28) between the TRIM
and GND pins of the module. Without this external
resistor, the output voltage of the module is 0.7525 Vdc.
To calculate the value of the resistor Rtrim for a particular
output voltage Vo, please use the following equation:

Rtrim

⎢

−

7525.0

Vo

⎣

21070

⎡

= 5110

For example, to program the output voltage of the DNS
module to 1.8Vdc, Rtrim is calculated as follows:

21070

⎡

= KRtrim 155110

⎢

−

⎣

−

7525.08.1

DNT can also be programmed by apply a voltage
between the TRIM and GND pins (Figure 29). The
following equation can be used to determine the value of
Vtrim needed for a desired output voltage Vo:

()

For example, to program the output voltage of a DNT
module to 3.3 Vdc, Vtrim is calculated as follows

()

⎤

Ω

−

⎥
⎦

⎤
⎥

⎦

7525.01698.07.0 −×

VoVtrim

Ω=Ω

VVtrim 267.07525.03.31698.07.0

Figure 27: Negative remote On/Off implementation

Over-Current Protection

To provide protection in an output over load fault
condition, the unit is equipped with internal over-current
protection. When the over-current protection is
triggered, the unit enters hiccup mode. The units operate
normall

once the fault condition is removed.

DS_DNT04SIP3A_09262007

GND

Vo

RLoad

TRIM

Rtrim

Figure28: Circuit configuration for programming output voltage
using an external resistor

8

A

FEATURE DESCRIPTIONS (CON.)

Vo

Vtrim

TRIM

GND

Figure 29: Circuit Configuration for programming output voltage
using external voltage source

The amount of power delivered by the module is the
voltage at the output terminals multiplied by the output
current. When using the trim feature, the output voltage of
the module can be increased, which at the same output
current would increase the power output of the module.
Care should be taken to ensure that the maximum output
power of the module must not exceed the maximum rated
power (

Vo.set x Io.max ≤ P max).

Voltage Margining

Output voltage margining can be implemented in the DNT
modules by connecting a resistor, R
pin to the ground pin for margining-up the output voltage
and by connecting a resistor, R
to the output pin for margining-down. Figure 30 shows the
circuit configuration for output voltage margining. If
unused, leave the trim pin unconnected.
is available from the evaluation procedure which
computes the values of R
specific output voltage and margin percentage.

margin-up and Rmargin-down for a

RLoad

+

_

margin-up, from the Trim

margin-down, from the Trim pin

calculation tool

Vin

On/Off

Vo

Trim

Rtrim

GND

Figure 30: Circuit configuration for output voltage margining

DS_DNT04SIP3A_09262007

Rmargin-down

Q1

Rmargin-up

Q2

9

THERMAL CONSIDERATIONS

A

Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.

Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.

Thermal Testing Setup

Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics equipment.
This type of equipment commonly uses vertically mounted
circuit cards in cabinet racks in which the power modules
are mounted.

The following figure shows the wind tunnel
characterization setup. The power module is mounted on
a test PWB and is vertically positioned within the wind
tunnel. The height of this fan duct is constantly kept at

25.4mm (1’’).

Thermal Derating

Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power module
should always be operated below the maximum operating
temperature. If the temperature exceeds the maximum
module temperature, reliability of the unit may be affected.

FACI NG PWB

PWB

THERMAL CURVES

Figure 32: Temperature measurement location
The allowed maximum hot spot temperature is defined at 125

Output Current (A)

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

DNT04S0A0R03(standard) Output Current vs. Ambient Temperature and Air Velocity

25 30 35 40 45 50 55 60 65 70 75 80 85

@Vin=5V Vout=0.75~3.3V (Through PCB Orientation)

Natural

Convection

Ambient Temperature (℃)

Figure 33: Output current vs. ambient temperature and air
velocity @ Vin=5V, Vout=0.75V~3.3V(Through PCB Orientation)

℃

AIR VELOCITY
AND AMBIENT

TEMPERATURE

MEASURED BELOW

THE MODULE

IR FLOW

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

50.8 (2.0”)

Figure 31: Wind tunnel test setup

DS_DNT04SIP3A_09262007

MODULE

12.7 (0.5”)

25.4 (1.0”)

10

MECHANICAL DRAWING

SMD PACKAGE (OPTIONAL) SIP PACKAGE

DS_DNT04SIP3A_09262007

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PART NUMBERING SYSTEM

DNT 04 S 0A0 R 03 N F A

Product

Series

DNT- 3A/5A 04 - 2.4V~5.5V S - Single 0A0 -

Input Voltage

Numbers

of Outputs

Output

Voltage

Programmable

Package

Typ e

R - SIP 03 - 3A

Output

Current

On/Off

logic

N- negative

(Default)

P- positive

Option Code

F- RoHS 6/6

(Lead Free)

A - Standard Function

MODEL LIST

Model Name Package Input Voltage Output Voltage Output Current

DNT04S0A0S03NFA SMD 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc

DNT04S0A0R03NFA SIP 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc

DNT04S0A0S05NFA SMD 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc

DNT04S0A0R05NFA SIP 2.4V ~ 5.5Vdc 0.75V ~ 3.63Vdc

3A

3A

5A

5A

5Vin, 3.3Vdc full load

Efficiency

93.5%

94%

94%

93%

CONTACT:

USA:

Telephone:
East Coast: [phone]
West Coast: [phone]
Fax: [phone]
Email:

[e-mail]

www.delta.com.tw/dcdc

Europe:

Telephone: [phone]
Fax: [phone]

[e-mail]

Email:

Asia & the rest of world:

Telephone: [phone] x6220
Fax: [phone]

[e-mail]

Email:

WARRANTY

Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon
request from Delta.

Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta
for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license
is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these
specifications at any time, without notice.

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