YV12T25 DC-DC Converter
10 - 14 VDC Input; 0.8 - 5.5 VDC Programmable @ 25 A
Data Sheet
The
Features
Products: Y-Series
Applications
Intermediate Bus Architectures
Telecommunications
Data communications
Distributed Power Architectures
Servers, workstations
Benefits
High efficiency– no heat sink required
Cost effective
Reduces Total Solution Board Area
Description
RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 25 A
Input range 10 - 14 V
Small size and low profile: 1.25” x 2.00” x 0.335”
(31.7 x 50.8 x 8.50 mm)
Start-up into pre-biased output
No minimum load required
Operating ambient temperature: -40 °C to 85 °C
Remote output sense
Remote ON/OFF
Fixed frequency operation (500 kHz)
Auto-reset output overcurrent protection
High reliability, MTBF = 23 Million Hours
All materials meet UL94, V-0 flammability rating
UL60950 recognition in U.S. & Canada, and
certification per IEC/EN60950
Power-One’s point-of-load converters are recommended for use with regulated bus converters in an Intermediate
Bus Architecture (IBA). The YV-Series of non-isolated dc-dc converters deliver up to 25 Amps of output current
in a through-hole (SIP) package. Operating from a 10 - 14 VDC input, the YV12T25 converter is an ideal choice
for Intermediate Bus Architectures where Point-of-Load (POL) power delivery is a requirement. The converter
provides an extremely tight regulated programmable output voltage of 0.80 V to 5.5 V.
The YV-Series of converters provide exceptional thermal performance, even in high temperature environments
with minimal airflow. 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 minimizes impedance to system airflow, thus enhancing cooling for both upstream and
downstream devices. The use of automation for assembly, coupled with advanced power electronics and thermal
design, results in a product with extremely high reliability.
ZD-01983 Rev. 2.1, 25-Jun-10
www.power-one.com
Page 1 of 12
YV12T25 DC-DC Converter
10 - 14 VDC Input; 0.8 - 5.5 VDC Programmable @ 25 A
Data Sheet
Electrical Specifications
Conditions: T
A
= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12.0 VDC, Vout = 0.8 – 5.5 V, unless otherwise specified.
Parameters
Absolute Maximum Ratings
Input Voltage
Operating Ambient Temperature
Storage Temperature
Feature Characteristics
Switching Frequency
Output Voltage Trim Range
1
Remote Sense Compensation
1
Turn-On Delay Time
2
With Vin = (Converter Enabled, then Vin
applied)
Continuous
Notes
Min
-0.3
- 40
-55
Typ
Max
14
85
125
Units
VDC
°C
°C
kHz
VDC
VDC
500
By external resistor, See Trim Table 1
0.7887
5.5
0.5
Full resistive load
From Vin = Vin(min) to Vo = 0.1*
Vo(nom)
0.5
1.0
2.0
ms
ms
ms
With Enable (Vin = Vin(nom) applied, then
enabled)
From enable to Vo = 0.1*Vo(nom)
2
Rise time (Full resistive load; No external
output capacitors)
From 10%Vo(set) to 90%Vo(set)
Vin=Vin(on) to Vin(max);
3
SEQ/ENA Control Signal
Open collector or equivalent;
(Signal referenced to GND)
Logic High (Module OFF)
SEQ/ENA Current
SEQ/ENA Voltage
Logic Low (Module ON)
SEQ/ENA Current
SEQ/ENA Voltage
0.5
3.5
2.33
14
200
0.8
mA
VDC
μA
VDC
Additional Notes:
1
The output voltage should not exceed 5.5 V (taking into account both the programming and remote sense compensation).
2
Note that startup time is the sum of turn-on delay time and rise time.
3
The converter is ON if the SEQ/ENA pin is left open.
ZD-01983 Rev. 2.1, 25-Jun-10
www.power-one.com
Page 2 of 12
YV12T25 DC-DC Converter
10 - 14 VDC Input; 0.8 - 5.5 VDC Programmable @ 25 A
Data Sheet
Electrical Specifications (continued)
Conditions: T
A
= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12.0 VDC, Vout = 0.8 – 5.5 V, unless otherwise specified.
Parameter
Input Characteristics
Operating Input Voltage Range
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
Maximum Input Current
Notes
Min
10
Typ
12
Max
14
9.9
Units
VDC
VDC
VDC
8.1
25 ADC Output @ 10VDC Input
V
OUT
= 5.0 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
= 0.8 VDC
13.2
8.9
6.9
5.6
5.1
4.3
3.5
2.5
25
V
OUT
= 5.0 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
= 0.8 VDC
113
94
84
78
78
77
77
77
30
60
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
P-P
dB
Input Standby Current (Converter disabled)
Input No Load Current (Converter enabled)
Input Reflected-Ripple Current -
i
s
Input Voltage Ripple Rejection
See Fig. E for setup. (BW = 20 MHz)
120 Hz
ZD-01983 Rev. 2.1, 25-Jun-10
www.power-one.com
Page 3 of 12
YV12T25 DC-DC Converter
10 - 14 VDC Input; 0.8 - 5.5 VDC Programmable @ 25 A
Data Sheet
Electrical Specifications (continued)
Conditions: T
A
= 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 12.0 VDC, Vout = 0.8 – 5.5 V, unless otherwise specified.
Parameter
Output Characteristics
Output Voltage Set Point (No Load)
Output Regulation
Over Line
Notes
Min
- 1.2
Typ
Vout
0.01
0.1
Max
+1.2
0.1
0.2
+3.0
Units
%Vout
%Vout
%Vout
%Vout
Full resistive load
Over Load
From no load to full load
Output Voltage Range
(Over all operating input voltage, resistive load
and temperature conditions until end of life )
Output Ripple and Noise – 20 MHz bandwidth Over line, load and temperature
Peak-to-Peak
Overtemperature protection
External Load Capacitance
Min ESR > 1mΩ
Min ESR > 10mΩ
Min ESR > 10mΩ
Output Current Range
Output Current Limit Inception (I
OUT
)
Output Short-Circuit Current , RMS Value
Short = 10 mΩ, continuous
V
OUT
= 5.0 VDC
V
OUT
= 5.0 VDC
-3.0
40
5.7
6.0
125
1,000
10,000
6,800
0
125
3
25
150
6.3
mV
P-P
V
°C
μF
μF
μF
A
%Iout
Arms
Output Overvoltage Protection (Non-Latching) All output voltages
All output voltages
Plus full load (resistive)
Dynamic Response
Load current change from 12.5 A – 25 A,
di/dt = 5 A/μs
No external output capacitance
25
150
25
Full load (25A)
V
OUT
= 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
= 0.8 VDC
94.3
92.2
90.7
88.9
88.0
86.3
83.7
77.7
%
%
%
%
%
%
%
%
150
mV
µs
mV
µs
Settling Time (V
OUT
< 10% peak deviation)
Unloading current change from 25 A – 12.5 A,
di/dt = -5 A/μs
No external output capacitance
Settling Time (V
OUT
< 10% peak deviation)
Efficiency
General Specifications
Parameter
Calculated MTBF
Weight
Notes
50% Stress, Ta = 40 °C
Min
Typ
23
19
(0.67)
Max
Units
Million
Hours
-
-
g(oz.)
ZD-01983 Rev. 2.1, 25-Jun-10
www.power-one.com
Page 4 of 12
YV12T25 DC-DC Converter
10 - 14 VDC Input; 0.8 - 5.5 VDC Programmable @ 25 A
Data Sheet
Operations
Input and Output Impedance
The YV-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. It is
recommended to use low - ESR tantalum, POS or
ceramic decoupling capacitors (minimum 150
μF)
placed as close as possible to the converter input
pins in order to ensure stability of the converter and
reduce input ripple voltage. Internally, the converter
has 40
μF
(low ESR ceramics) of input capacitance.
The YV12T25-0 has been designed for stable
operation with or without external output
capacitance.
It is important to keep low resistance and low
inductance PCB traces for connecting load to the
output pins of the converter in order to maintain good
load regulation.
Fig. B:
Remote sense circuit configuration.
Remote Sense (Pins 1 and 2)
The remote sense feature of the converter
compensates for voltage drops occurring between
the output pins of the converter and the load. The
SENSE(-) (Pin 2) and SENSE(+) (Pin 1) pins should
be connected at the load or at the point where
regulation is required (see Fig. B).
SEQ/ENA (Pin 13)
The SEQ/ENA pin is used to turn the power
converter on or off remotely via a system signal. If
not using the remote ON/OFF, leave the pin open
(module will be on). The SEQ/ENA signal is
referenced to ground. The typical connections are
shown in Fig. A.
The converter is ON when the SEQ/ENA pin is at a
logic low or left open, and OFF when the SEQ/ENA
pin is at a logic high (3.5V min) or connected to Vin.
The external resistor R1 should be chosen to
maintain 3.5V minimum on the SEQ/ENA pin to
insure that the unit is OFF when Q1 is turned OFF.
Note that the external diode is required for proper
operation.
Because the sense lead carries minimal current,
large trace on the end-user board are not required.
However, sense trace should be located close to a
ground plane to minimize system noise and ensure
the optimum performance.
When utilizing the remote sense feature, care must
be taken not to exceed the maximum allowable
output power capability of the converter, which is
equal to the product of the nominal output voltage
and the allowable output current for the given
conditions.
When using remote sense, the output voltage at the
converter can be increased up to 0.5 V above the
nominal rating in order to maintain the required
voltage across the load. Therefore, the designer
must, if necessary, decrease the maximum current
(originally obtained from the derating curves) by the
same percentage to ensure output power remains at
or below the maximum allowable output power.
Fig. A:
Circuit configuration for ON/OFF function.
ZD-01983 Rev. 2.1, 25-Jun-10
www.power-one.com
Page 5 of 12
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