NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
SRDB-08C Series
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Nonisolated
Compact, low profile surface mount package
Fixed frequency
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
POWER PRODUCTS
BP06SRDB-08C
RoHS Compliant
Description
The Bel SRDB-08C modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal
3.3V source. These converters are available in a range of output voltages from 1.2V to 2.5V. They are packaged in a compact,
low profile, surface mount DIP package for ease of layout and space savings. 8A maximum output is also provided. Standard
features include remote on/off, 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 3.3V 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
2.5V
1.8V
1.5V
1.2V
Input
Voltage
3.3V
3.3V
3.3V
3.3V
Max. Output
Current
8A
8A
8A
8A
Max. Output
Power
20W
14.4W
12W
9.6W
Typical
Efficiency
92%
88%
86%
83%
Part Number
SRDB-08C250
SRDB-08C180
SRDB-08C150
SRDB-08C120
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
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
BP06SRDB-08C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
Absolute Maximum Ratings
Parameter
Continuous Input Voltage
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Symbol
Vin
Vouten
Tamb
Tstor
Min
-0.3
-0.3
-40
-55
Typical
Max
4
4
85
100
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
Module
All
Symbol
Vin
Iin
Input Current
2.5V
1.8V
1.5V
1.2V
All
10
20
60
0.05
2.85
2.3
7.9
6.3
5.3
4.4
100
20
40
100
0.1
mA
mA
mA
rms
mApk
A
2
s
V
V
Min
3
Typical
3. 3
Max
3.6
Units
V
A
No Load Input Current
Remote Off 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
Note: Input capacitance two 270µF/10V, ESR = 0.018
Ω
max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
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
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
Output Specifications
Parameter
Output Voltage Set Point
1
2.5V
1.8V
1.5V
1.2V
Load Regulation
2.5V
1.8V
1.5V
1.2V
Line Regulation
Regulation Over Temperature
2.5V
1.8V
1.5V
1.2V
Total Output Voltage Regulation
2.5V
1.8V
1.5V
1.2V
Output Ripple and Noise
2
2.5V
1.8V
1.5V
1.2V
Output Ripple and Noise
2
Output Current Range
Output DC Current Limit
Shor t Circuit Surge
2.5V
1.8V
1.5V
1.2V
Turn on Time
Overshoot at Turn On
Output Capacitance
All
All
All
Cout
0
Ton
All
All
All
Iout
Ioutlim
Ioutsurge
0.06
0.07
0.09
0.15
10
0
0.12
0.14
0.18
0.22
20
3
3200
ms
%
µF
0
10.4
55
40
40
40
10
100
75
75
75
25
8
20
mVrms
A
A
A
2
s
45
40
35
32
mVp-p
10
8
5
4
25
20
15
12
mV
All
7.0
7.0
6.0
6.0
2.0
15
15
15
15
5
mV
mV
Module
Symbol
Vout
2.45
1.764
1.47
1.176
2.5
1.8
1.5
1.2
2.55
1.836
1.53
1.224
mV
Min
Typical
Max
Units
V
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 3.3V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
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
BP06SRDB-08C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
Output Specifications
Parameter
Transient Response
3
Module
Symbol
Min
Typical
Max
Units
∆
V 50% to 100% of Max Load
Settling Time
2.5V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
110
Ts
50
110
Ts
50
150
100
150
100
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.8V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
90
Ts
50
90
Ts
50
125
100
125
100
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.5V
∆
V 100% to 50% of Max Load
Settling Time
Transient Response
3
90
Ts
50
90
Ts
50
125
100
125
100
mV
µs
mV
µs
∆
V 50% to 100% of Max Load
Settling Time
1.2V
∆
V 100% to 50% of Max Load
Settling Time
Ts
Ts
90
50
90
50
125
100
125
100
mV
µs
mV
µs
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt = 0.5A/1µS, Ta = 25° C with a 470µF Tantalum cap at output.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
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
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
General Specifications
Parameter
Efficiency
1
2.5V
1.8V
1.5V
1.2V
Switching Frequency
Output Voltage Trim Range
2
2.5V
1.8V
1.5V
1.2V
Remote Sense Compensation
2.5V
1.8V
1.5V
1.2V
Weight
All
10.5
5
10
10
10
g
80
90
90
90
105
110
110
110
%
All
Fsw
Module
Symbol
η
89
85
83
80
250
92
88
86
83
300
340
kHz
%
Min
Typical
Max
Units
%
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on pages 12-14.
Control Specifications
Parameter
Remote On/Off
3
Signal Low (Unit Off)
Signal High (Unit On)
Module
All
All
All
Symbol
Vouten
-0.3
2.8
0.8
4
Min
Typical
Max
Units
V
V
V
3. With remote on/off pin 8 open, the module is on.
Note: On/off pin designed to work with an open collector/drain switch.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
