E2S Series – Eighth-Brick DC/DC Converter
48V Input
5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V Output
Data Sheet
Features
Low profile (<8.5mm)
2000 VDC input to output isolation meets
basic insulation
High efficiency
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Back drive protection
Remote sense
Set point accuracy 1%
Remote on/off (primary referenced),
positive or negative logic
Output voltage trim adjust
UL 1950 Recognized, CSA 22.2 No. 950-
95 certified, TUV IEC950
Applications
Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
Description
The new E2S15 series of single-output DC/DC converters, offer unprecedented density and performance in
an eighth brick, which is 40% smaller than the traditional quarter-brick footprint. Patent pending technology
combined with thermally optimized construction allows the E2S15 to provide 15A of output current in an
8.5mm package without a heatsink. And the E2S15 series requires minimal derating to operating in high
ambient temperatures. The 100% surface mount design provides consistent high quality and reliability and
the SMT mounting option eliminates the need for separate (additional manual) operations to mount the
converters to the motherboards during mass production.
Selection Chart
Output
Output Rated
Voltage,
Current,
I rated
VDC
ADC
1.2
15
1.5
15
1.8
15
2.0
15
2.5
15
3.3
15
5.0
10
Model
E2S15ZY
E2S15ZA
E2S15ZB
E2S15ZC
E2S15ZD
E2S15ZE
E2S10ZG
Input
Voltage
Range,
VDC
36-75
36-75
36-75
36-75
36-75
36-75
36-75
Input
Current,
Max,
ADC
0.62
0.77
0.9
1.0
1.2
1.60
1.65
Output
Ripple /
Noise, Typ,
mV p-p
30
30
30
30
30
30
30
Efficiency
@ I rated,
Typical,
%
81.5
83.5
84.5
85.5
87
88
86
REV. MAR 11, 2003
Page 1 of 10
E2S Series – Eighth-Brick DC/DC Converter
48V Input
5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V Output
Absolute Maximum Ratings
Data Sheet
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect
long-term reliability, and cause permanent damage to the converter.
Parameter
Input Voltage
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
Conditions/Description
Continuous
100 ms
Ambient
Referenced to -Vin
Min
-40
-55
Max
75
100
85
125
20
Units
VDC
VDC
C
C
VDC
Environmental and Mechanical Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise
noted.
Parameter
Shock
Sinusoidal Vibration
Weight
Water Washing
MTBF
Conditions/Description
Halfsine wave, 3 axes
GR-63-Core, Section 5.A.2
Standard process
Telcordia TR-332, Method I Case 1
Min
50
1
Nom
0.53 (15 )
Yes
2.6
Max
Units
g
Oz/g
MHrs
Isolation Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise
noted.
Parameter
Insulation Safety Rating
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Conditions/Description
Min
2000
10
160
Nom
Basic
Max
Units
VDC
MOhm
pF
Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise
noted.
Parameter
Input Voltage
Turn-On Input Voltage
Turn-Off Input Voltage
Turn-On Time
Input Reflected Ripple Current
Inrush Transient
Conditions/Description
Continuous
Ramping Up Vin= 36-75
Ramping Down Vin = 36-75
To Output Regulation Band
100% Resistive Load
25MHz Bandwidth
Vin=Vin.max
Min
36
33
31
Nom
48
3
6
0.1
Max
75
35
33
Units
VDC
VDC
VDC
ms
mA
pk.pk
A
2
s
REV. MAR 11, 2003
Page 2 of 10
E2S Series – Eighth-Brick DC/DC Converter
48V Input
5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V Output
Output Specifications
Data Sheet
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Output Voltage Setpoint Accuracy
Output Current
Line Regulation
Load Regulation
Total output voltage regulation
Remote Sense Headroom***
Dynamic Regulation
Peak Deviation
Settling Time
Admissible Load Capacitance
Output Current Limit Threshold**
Switching Frequency
Over voltage Protection,
Non Latching
Trim Range
Conditions/Description
Vin=Vin.nom, Full Load
Vin.min to Vin.max,
Iout.max
Vin=Vnom, Iout.min to
Iout.max
Over all input voltage, load,
and temperature conditions
50-75% load step change
di/dt = 5 A/µs
to 1% error band
Iout.max, Nom Vin
Vout≤0.97Vout.nom
Over all input voltage and
load conditions
Iout.max, Vin=Vnom
Min
-1
0
Nom
Max
1
15
+/- 5
+/- 5
3
10%
140
100
16.5
115
-20
435
122
15,000
20
127
+10
Units
%Vout
ADC
mV
mV
%Vout
%Vout
mV
s
F
Adc
kHz
%Vout
%Vout
+/- 2
+/- 2
-3
** Overcurrent protection is non-latching with auto recovery.
*** Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total
output voltage trim from all sources should not exceed 10% of Vout (NOM) in order to insure specified
operation of over-voltage protection circuitry.
Feature Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise
noted.
Parameter
Shutdown (ON/OFF)
Negative Logic
- Converter ON
- Converter OFF
Positive Logic
- Converter ON
- Converter OFF
Overtemperature
Protection (PCB)
Conditions/Description
On/Off signal is low – converter is ON
Low logic range
High logic range
On/Off signal is low –converter is OFF
High logic range
Low logic range
Shut down
Min
-20
2.4
2.4
-20
118
Nom
Max
0.8
20
20
0.8
Units
VDC
VDC
VDC
VDC
C
REV. MAR 11, 2003
Page 3 of 10
E2S Series – Eighth-Brick DC/DC Converter
48V Input
5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V Output
Output Voltage Trim
The trim feature allows the user to adjust the
output voltage from the nominal value. This can
be used to compensate distribution drops,
perform margining in production, or accommodate
other requirements when output voltage needs to
be adjusted from the nominal.
The converter’s output voltage (at the terminals)
can be adjusted up 10% or down 20% relative to
the nominal output voltage by connecting the
TRIM pin to sense (+) or sense (-) via a trim
resistor. The Trim pin should be left open if the
trimming function is not to be used.
To trim up the output voltage, a trim resistor, RT-
INCR, should be connected between TRIM (Pin 6)
and SENSE(+) (Pin 7), as illustrated in Fig. 1.
The trim-up resistor can be calculated from:
Data Sheet
Figure 2. Output Voltage Trim-down
The trip-down resistor can be calculated from:
R
T-DECR
=
____________
510
∆
- 10.2 [KΩ]
where,
R
T-DECR
Required value of trim-down resistor
and
∆
is as defined above.
Figure 1. Output Voltage Trim-up
R
T-INCR
=
5.1(100+∆)V
O-NOM
– 624.75
__________________________________
1.225
∆
- 10.2 [KΩ]
where,
R
T-INCR
Required value of trim-up resistor
V
O-NOM
= Nominal value of output voltage
insert absolute value bars
∆
=
V
O-REQ
- V
O-NOM
_________________________
V
O-NOM
x 100
[%]
V
O-REQ
= Desired (trimmed) output voltage
When trimming up, care must be taken not to
exceed the converter‘s maximum allowable output
power.
To trim down the output voltage, a trim resistor,
R
T-DECR
, should be connected between TRIM (Pin
6) and SENSE(-) (Pin 5), as illustrated in Figure 2.
REV. MAR 11, 2003
Page 4 of 10
E2S Series – Eighth-Brick DC/DC Converter
48V Input
5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V Output
Characteristic Curves
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
Load Current [Adc]
8
10
12
72 V
48 V
36 V
Data Sheet
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
8
10
12
14
16
Load Current [Adc]
72 V
48 V
36 V
Figure 3. E2S10ZG (5.0V) Efficiency vs. Load
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
8
10
12
14
16
Load Current [Adc]
72 V
48 V
36 V
Figure 6. E2S15ZC (2.0V) Efficiency vs. Load
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
8
10
12
14
16
Load Current [Adc]
72 V
48 V
36 V
Figure 4. E2S15ZE (3.3V) Efficiency vs. Load
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
8
10
12
14
16
Load Current [Adc]
72 V
48 V
36 V
Figure 7. E2S15ZB (1.8V) Efficiency vs. Load
0.95
0.90
0.85
Efficiency
0.80
0.75
0.70
0.65
0
2
4
6
8
10
12
14
16
Load Current [Adc]
72 V
48 V
36 V
Figure 5. E2S15ZD (2.5V) Efficiency vs. Load
Figure 8. E2S15ZA (1.5V) Efficiency vs. Load
REV. MAR 11, 2003
Page 5 of 10
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