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Datasheet> All Categories > Power/power management> The power supply circuit> YNM05S05
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YNM05S05

Description
DC-DC Regulated Power Supply Module, 1 Output, Hybrid,
CategoryPower/power management    The power supply circuit   
File Size963KB，19 Pages
ManufacturerBel Fuse
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YNM05S05 Overview

DC-DC Regulated Power Supply Module, 1 Output, Hybrid,

YNM05S05 Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerBel Fuse
Reach Compliance Codeunknown
ECCN codeEAR99
Other featuresREMOTE SHUTDOWN
Analog Integrated Circuits - Other TypesDC-DC REGULATED POWER SUPPLY MODULE
CertificationEN, IEC, UL
Efficiency (main output)94%
high6.27 mm
Maximum input voltage5.5 V
Minimum input voltage3 V
Nominal input voltage5 V
JESD-30 codeR-XDMA-X5
JESD-609 codee4
length20.32 mm
Maximum load regulation0.4%
Number of functions1
Output times1
Number of terminals5
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current5 A
Maximum output voltage3.63 V
Minimum output voltage0.7525 V
Package body materialUNSPECIFIED
Package shapeRECTANGULAR
Package formMICROELECTRONIC ASSEMBLY
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
surface mountNO
technologyHYBRID
Terminal surfaceGOLD OVER NICKEL
Terminal formUNSPECIFIED
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
Fine-tuning/adjustable outputYES
width11.43 mm

YNM05S05 Preview

The YNM05S05 is not recommended for new designs and has been replaced by the YM05S05.
Please refer to the YM05S05 data sheet for new product specifications.
Bel Power Solutions point-of-load converters are
recommended for use with regulated bus converters in an
Intermediate Bus Architecture (IBA). The YNM05S05 non-
isolated DC-DC converters deliver up to 5 A of output
current in an industry-standard surface-mount package.
Operating from a 3.0 – 5.5 V input, the YNM05S05
converters are ideal choices for Intermediate Bus
Architectures where Point-of-Load (POL) power delivery is
generally a requirement. The converters provide an
extremely tight regulated programmable output voltage
from 0.7525 V to 3.63 V.
The Y-Series of converters provide exceptional thermal
performance, even in high temperature environments with
minimal airfl
without airflow at natural convection. This performance is
accomplished through the use of advanced circuitry,
packaging and processing techniques to achieve a design
possessing ultra-high efficiency, excellent thermal
management, and a very low-body profile.
The low-body profile and the preclusion of heat sinks
minimize impedance to system airflow, thus enhancing
cooling for both upstream and downstream devices. The
use of 100% automation for assembly, coupled with
advanced power electronics and thermal design, results in
a product with extremely high reliability.
RoHS lead-free solder and lead-solder-exempted products
are available
Delivers up to 5 A
Surface-Mount package
Industry-standard footprint and pinout
Small size and low profile: 0.80” x 0.45” x 0.247” (20.32 mm
x 11.43 mm x 6.27 mm)
Weight: 0.08 oz [2.22 g]
Coplanarity less than 0.003”, maximum
Synchronous Buck Converter Topology
Start up into pre-biased output
No minimum load required
Programmable output voltage via external resistor
Operating ambient temperature: -40 °C to 85 °C
Remote ON/OFF
Fixed frequency operation
Auto-reset output overcurrent protection
Auto-reset overtemperature protection
High reliability, MTBF approx. 69 Million Hours
calculated per Telcordia TR-332, Method I Case 1
All materials meet UL94, V-0 flammability rating
UL60950 recognition in U.S. & Canada, and DEMKO
certification per IEC/EN60950
Intermediate Bus Architectures
Telecommunications
Data communications
Distributed Power Architectures
Servers, Workstations
High efficiency – no heat sink required
Reduces Total Solution Board Area
Tape and Reel packing
Compatible with Pick & Place Equipment
Minimizes Part Numbers in Inventory
North America
+1-866.513.2839
Asia-Pacific
+86.755.29885888
Europe, Middle East
+353 61 225 977
tech.support@psbel.com
© 2015 Bel Power Solutions, Inc.
BCD.00640_AA
YNM05S05 DC-DC Converter
Conditions: T
A
= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 5 VDC, Vout = 0.7525 – 3.63 V, unless otherwise specified.
PARAMETER
Absolute Maximum Ratings
Input Voltage
Operating Ambient Temperature
Storage Temperature
Feature Characteristics
Switching Frequency
Output Voltage Trim Range
Turn-On Delay Time
2
1
NOTES
Continuous
MIN
-0.3
-40
-55
TYP
MAX
6
85
125
UNITS
VDC
°C
°C
kHz
300
By external resistor, See Trim Table 1
Full resistive load
3.5
3.5
3.5
2.4
-5
4.5
3.0
5.0
5.0
2.3
2
V
OUT
= 3.3 VDC
V
OUT
= 2.5 VDC
V
OUT
= 2.0 VDC
V
OUT
= 1.8 VDC
V
OUT
= 1.5 VDC
V
OUT
= 1.2 VDC
V
OUT
= 1.0 VDC
V
OUT
= 0.7525 VDC
Vin = 5.0 VDC
Vin = 5.5 VDC
V
OUT
= 3.3 VDC
V
OUT
= 2.5 VDC
V
OUT
= 2.0 VDC
V
OUT
= 1.8 VDC
V
OUT
= 1.5 VDC
V
OUT
= 1.2 VDC
V
OUT
= 1.0 VDC
V
OUT
= 0.7525 VDC
70
65
60
55
50
40
35
30
40
2
2.2
4.2
4.5
3.7
3.4
2.9
2.35
2.0
1.6
5.5
0.8
5.5
5.5
2. 5
0.7525
3.63
VDC
ms
ms
ms
VDC
VDC
VDC
VDC
VDC
VDC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
P-P
With Vin = (Converter Enabled, then Vin applied) From Vin = Vin(min) to Vo = 0.1* Vo(nom)
With Enable (Vin = Vin(nom) applied, then enabled) From enable to Vo = 0.1*Vo(nom)
Rise time
2
(Full resistive load)
ON/OFF Control
3
Input Characteristics
Operating Input Voltage Range
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
Maximum Input Current
V
IN
= 4.5 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
V
IN
= 3.0 VDC, I
OUT
= 5 A
Input Standby Current (Converter disabled)
Input No Load Current (Converter enabled)
For Vout 2.5 V
For Vout 2.5 V
From 0.1*Vo(nom) to 0.9*Vo(nom)
Converter Off
Converter On
Input Reflected-Ripple Current -
i
s
Notes:
1
2
3
See Fig. F for setup. (BW = 20 MHz)
The output voltage should not exceed 3.63 V.
Note that startup time is the sum of turn-on delay time and rise time.
The converter is on if ON/OFF pin is left open.
866.513.2839
tech.support@psbel.com
© 2015 Bel Power Solutions, Inc.
BCD.00640_AA
YNM05S05 DC-DC Converter
PARAMETER
Output Characteristics
Output Voltage Set Point (no load)
Output Regulation
4
NOTES
MIN
-1.5
TYP
Vout
0.1
0.3
MAX
+1.5
0.2
0.4
+3
UNITS
%Vout
%Vout
%Vout
%Vout
Over Line
Over Load
Output Voltage Tolerance
(Over all operating input voltage, resistive load
and temperature conditions until end of life )
Output Ripple and Noise – 20 MHz bandwidth
Peak-to-Peak
Peak-to-Peak
External Load Capacitance
Min ESR > 1 mΩ
Min ESR > 10 mΩ
Output Current Range
Output Current Limit Inception (I
OUT
)
Output Short-Circuit Current (Hiccup mode)
Dynamic Response
Load current change from 2.5 A – 5 A,
di/dt = 5 A/µs
Settling Time (V
OUT
< 10% peak deviation)
Unloading current change 5 A – 2.5 A,
di/dt = -5 A/µs
Settling Time (V
OUT
< 10% peak deviation)
Efficiency
Vin = 3.0 V – 5.5 V, Full resistive load
From no load to full load
-3
Over line, load and temperature
V
OUT
= 3.3 VDC Full load
V
OUT
= 0.7525 VDC Full load
Plus full load (resistive)
50
30
70
50
1,000
2,000
mV
P-P
mV
P-P
µF
µF
A
A
Arms
0
10
Short = 10 mΩ, continuous
3
5
14
5
Co = 47 µF ceramic. + 1 µF ceramic
110
35
mV
µs
mV
µs
%
%
%
%
%
%
%
%
Co = 47 µF ceramic + 1 µF ceramic
110
35
Full load (5 A)
V
OUT
= 3.3 VDC
V
OUT
= 2.5 VDC
V
OUT
= 2.0 VDC
V
OUT
= 1.8 VDC
V
OUT
= 1.5 VDC
V
OUT
= 1.2 VDC
V
OUT
= 1.0 VDC
V
OUT
= 0.7525 VDC
94.0
92.0
90.0
89.5
87.0
85.5
83.5
80.0
Notes:
4
Trim resistor connected across the GND and TRIM pins of the converter.
866.513.2839
tech.support@psbel.com
© 2015 Bel Power Solutions, Inc.
BCD.00640_AA
YNM05S05 DC-DC Converter
Input and Output Impedance
The
Y-Series
converter should be connected via a low impedance to the DC power source. In many applications, the
inductance associated with the distribution from the power source to the input of the converter can affect the stability
of the converter. The use of decoupling capacitors are recommended to ensure stability of the converter and reduce
input ripple voltage. Internally, the converter has 20 µF (low ESR ceramics) of input capacitance.
In a typical application, low - ESR tantalum or POS capacitors will be sufficient to provide adequate ripple voltage
filtering at the input of the converter. However, very low ESR ceramic capacitors
47-100 µF are recommended at the input of the converter in order to minimize the input ripple voltage. They should
be placed as close as possible to the input pins of the converter.
The
YNM05S05
has been designed for stable operation with or without external capacitance. Low ESR ceramic
capacitors placed as close as possible to the load (minimum 47 µF) are recommended for improved transient
performance and lower output voltage ripple.
It is important to keep low resistance and low inductance PCB traces for connecting your load to the output pins of
the converter. This is required to maintain good load regulation since the converter does not have a SENSE pin for
compensating voltage drops associated with the power distribution system on your PCB.
Fig. A shows input voltage ripple for various output voltages using four 47
μF
input ceramic capacitors. The same plot
is shown in Fig. B with one 470
μF
polymer capacitor (6TPB470M from Sanyo) in parallel with two 47
μF
ceramic
capacitors at full load.
Input Voltage Ripple [mV] .
Input Voltage Ripple [mV] .
70
60
50
40
30
20
10
0
0
1
2
Vout [V]
3
4
Vin=5.0V
Vin=3.3V
80
70
60
50
40
30
20
10
0
0
1
2
Vout [V]
3
4
Vin=5.0V
Vin=3.3V
Fig. A: Input Voltage Ripple, C
IN
= 4x47
μ
F ceramic.
Fig. B: Input Voltage Ripple, CIN = 470
μ
F polymer + 2x47
μ
F ceramic.
Vin
R*
Y-Series
Converter
(Top View)
Vout
ON/OFF
Vin
Rload
GND
CONTROL
INPUT
TRIM
Fig. C: Circuit configuration for ON/OFF function.
ON/OFF (Pin 1)
The ON/OFF pin (Pin 1) is used to turn the converter on or off remotely via a system signal that is referenced to GND
(Pin 4). Typical connections are shown in Fig. C.
To turn the converter on the ON/OFF pin should be at a logic low or left open, and to turn the converter off the
ON/OFF pin should be at a logic high or connected to Vin.
866.513.2839
tech.support@psbel.com
© 2015 Bel Power Solutions, Inc.
BCD.00640_AA
YNM05S05 DC-DC Converter
ON/OFF pin is internally pulled down. A TTL or CMOS logic gate, open-collector (open-drain) transistor can be used
to drive ON/OFF pin. When using open-collector (open-drain) transistor, add a pull-up resistor (R*) of 5 K to Vin as
shown in Fig. C. The external pull-up resistor can be increased to 10K if the minimum input voltage is more than 3.0 V
and to 20K if the minimum voltage is more than 4.5 V. This device must be capable of:
–
–
sinking up to 1.2 mA at a low level voltage of 0.8 V
sourcing up to 0.25 mA at a high logic level of 2.3 V – 5.5 V.
Output Voltage Programming (Pin 3)
The output voltage can be programmed from
0.7525 V to 3.63 V by connecting an external resistor between TRIM pin (Pin 3) and GND pin (Pin 4); see Fig. D. Note
that when a trim resistor is not connected, the output voltage of the converter is 0.7525 V.
Vin
Y-Series
Converter
(Top View)
Vout
ON/OFF
Vin
Rload
GND
TRIM
R
TRIM
Fig. D: Configuration for programming output voltage.
A trim resistor, R
TRIM
, for a desired output voltage can be calculated using the following equation:
R
TRIM
½
where,
21.07
5.11
(V
O -REQ
- 0.7525)
[k]
R
TRIM
½
Required value of trim resistor [k]
V
O
REQ
½
Desired (trimmed) output voltage [V]
Note that the tolerance of a trim resistor directly affects the output voltage tolerance. It is recommended to use
standard 1% or 0.5% resistors; for tighter tolerance, two resistors in parallel are recommended rather than one
standard value from Table 1.
Ground pin of the trim resistor should be connected directly to the converter GND pin with no voltage drop in
between. Table 1 provides the trim resistor values for popular output voltages.
Table 1: Trim Resistor Value
V
0-REG
[V]
0.7525
1.0
1.2
1.5
1.8
2.0
2.5
3.3
3.63
R
TRIM
[kΩ]
open
80.02
41.97
23.08
15.00
11.78
6.95
3.16
2.21
The Closest Standard Value [kΩ]
80.6
42.2
23.2
15
11.8
6.98
3.16
2.21
866.513.2839
tech.support@psbel.com
© 2015 Bel Power Solutions, Inc.
BCD.00640_AA
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