NON-ISOLATED DC/DC CONVERTERS
4.5V – 13.2V Input / 1.0V – 5.0V Output / 10A
SRDB-10E Series
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Nonisolated
Compact, low profile surface mount package
Wide input
High efficiency means less power dissipation
Excellent thermal performance
Optimized for cost
Remote on/off
Undervoltage lockout (UVLO)
Over current and short circuit protection
Remote sense
Active high/low
POWER PRODUCTS
BP05SRDB-10E
Description
The Bel SRDB-10E modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal
4.5V to 13.2V source. These converters are available in a range of output voltages from 1.0V to 5.0V. The output is closely
regulated and the efficiency of the 3.3V output module is typically 88% at full load. The modules are packaged in a compact,
low profile, surface mount DIP package for ease of layout and space savings. 10A maximum output is also provided. Standard
features include remote on/off, remote sense, over current and short circuit protection, UVLO and output voltage adjust.
These products may be used almost anywhere low voltage silicon is employed and a 4.5V to 13.2V source is available.
Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
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Distributed power architectures
Data networking equipment
Telecommunications
Computers and peripherals
Part Number Selection
Output
Voltage
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Input
Voltage
8V - 13.2V
4.5V - 13.2V
4.5V - 13.2V
4.5V - 13.2V
4.5V - 13.2V
4.5V - 13.2V
4.5V - 13.2V
Max. Output
Current
10A
10A
10A
10A
10A
10A
10A
Max. Output
Power
50W
33W
25W
18W
15W
12W
10W
Typical
Efficiency
91%
88%
86%
82%
80%
77%
75%
Part Number
Active Low
SRDB-10E500
SRDB-10E330
SRDB-10E250
SRDB-10E180
SRDB-10E150
SRDB-10E120
SRDB-10E100
Part Number
Active High
SRDB-10E50H
SRDB-10E33H
SRDB-10E25H
SRDB-10E18H
SRDB-10E15H
SRDB-10E12H
SRDB-10E10H
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
POWER PRODUCTS
BP05SRDB-10E
NON-ISOLATED DC/DC CONVERTERS
4.5V – 13.2V Input / 1.0V – 5.0V Output / 10A
Absolute Maximum Ratings
Parameter
Continuous Input Voltage
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Symbol
Vin
Vouten
Tamb
Tstor
Min
-0.3
-0.5
0
-40
Typical
Max
16
7
70
105
Unit
V
V
°C
°C
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
1.0V - 3.3V
5.0V
Input Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
No Load Input Current
No Load Input Current
No Load Input Current
Input Reflected Ripple Current
1
Input Reflected Ripple Current (P-P)
1
I
2
t Inrush Current Transient
Turn On Voltage Threshold
Turn Off Voltage Threshold
Vin = 4.5V
Vin = 8.0V
Vin = 13.2V
All
All
All
All
All
Iin
Iin
Iin
60
80
100
40
120
0.1
4
3.5
80
200
0.2
4.5
4.2
Iin
7.9
9.1
7.4
5.6
4.8
4
3.4
mA
mA
mA
mA
rms
mApk
A
2
s
V
V
Module
Symbol
Vin
4.5
8
13.2
13.2
A
Min
Typical
Max
Units
V
Note: Input capacitance two 270µF/16V, ESR = 0.018
Ω
max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 2
NON-ISOLATED DC/DC CONVERTERS
4.5V – 13.2V Input / 1.0V – 5.0V Output / 10A
Output Specifications
Parameter
Output Voltage Set Point
1
POWER PRODUCTS
BP05SRDB-10E
Module
Symbol
Vout
Min
Typical
Max
Units
V
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Load Regulation
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Line Regulation
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Regulation Over Temperature
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Total Output Voltage Regulation
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Output Ripple and Noise
Output Ripple and Noise
Output Current Range
Output DC Current Limit
Shor t Circuit Surge
Turn on Time
Overshoot at Turn On
Output Capacitance
2
4.900
3.234
2.450
1.764
1.470
1.176
0.980
5.0
3.3
2.5
1.8
1.5
1.2
1.0
5.100
3.366
2.550
1.836
1.530
1.224
1.020
mV
10
7
6
6
6
5
5
20
14
12
12
12
10
10
mV
3
3
2
2
2
2
2
6
6
5
5
5
5
5
mV
30
24
22
20
18
16
14
60
48
44
40
36
32
28
mV
43
34
30
28
26
23
21
50
15
Iout
Ioutlim
Ioutsurge
Ton
0
Cout
0
0
12
0.1
86
68
61
57
53
47
43
100
30
10
25
0.2
20
3%
4000
mVp-p
mVr ms
A
A
A
2
s
ms
V
µF
All
All
All
All
All
All
All
All
2
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 8V, Iout = full load, Ta = 25° C.
2. Two 270µF/16V with ESR = 0.018
Ω
max at input, 0 - 20MHz BW, 1µF ceramic cap and 10µF aluminum cap at output.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 3
POWER PRODUCTS
BP05SRDB-10E
NON-ISOLATED DC/DC CONVERTERS
4.5V – 13.2V Input / 1.0V – 5.0V Output / 10A
Output Specifications
Parameter
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
∆
V 50% to 100% of Max Load
Settling Time
∆
V 100% to 50% of Max Load
Settling Time
4.5V to 13.2V Input
1.0V Output
Ts
80
60
80
Ts
60
150
100
150
100
mV
µs
mV
µs
4.5V to 13.2V Input
1.2V Output
Ts
80
60
80
Ts
60
150
100
150
100
mV
µs
mV
µs
4.5V to 13.2V Input
1.5V Output
Ts
80
60
80
Ts
60
150
100
150
100
mV
µs
mV
µs
4.5V to 13.2V Input
1.8V Output
Ts
80
60
80
Ts
60
150
100
150
100
mV
µs
mV
µs
4.5V to 13.2V Input
2.5V Output
Ts
80
60
80
Ts
60
150
100
150
100
mV
µs
mV
µs
4.5V to 13.2V Input
3.3V Output
Ts
90
60
90
Ts
60
150
100
150
100
mV
µs
mV
µs
8V to 13.2V Input
5V Output
Ts
120
60
120
Ts
60
200
100
200
100
mV
µs
mV
µs
Module
Symbol
Min
Typical
Max
Units
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt = 0.5A/µS, Ta = 25° C with external 220µF Tan cap.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 4
NON-ISOLATED DC/DC CONVERTERS
4.5V – 13.2V Input / 1.0V – 5.0V Output / 10A
POWER PRODUCTS
BP05SRDB-10E
General Specifications
Parameter
Efficiency
1
Vin = 12V, Io = Io max
Module
Symbol
η
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
All
All
All
All
10.5
Fsw
88
85
83
79
77
74
72
250
90
91
88
86
82
80
77
75
310
370
110
10
kHz
%
Min
Typical
Max
Units
%
Switching Frequency
Output Voltage Trim Range
2
Remote Sense Compensation
Weight
%
g
1. Vin=12V, full load and Ta=25° C.
2. See graphs on pages 13 - 16.
Note: For 3.3V output module, when the input voltage is between 4.5Vdc to 5.0Vdc, the output voltage
trim range is 90%-105%, and the remote sense compensation is 5%.
Control Specifications
Parameter
Remote On/Off
3
Module
All
Symbol
Vouten
Min
Typical
Max
Units
V
Signal Low (Unit Off)
S7DB-10ExxH
Signal High (Unit On)
Signal Low (Unit On)
S7DB-10Exx0
Signal High (Unit Off)
0
2.1
0
2.1
0.9
5
0.9
5
V
V
V
V
3. With remote on/off pin 8 open, the module is on.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
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