BEL SRDB-08C

NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
RoHS Compliant
SRDB-08C Series
•
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
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
•
Distributed power architectures
•
Data networking equipment
•
Telecommunications
•
Computers and peripherals
Part Number Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
2.5V
3.3V
8A
20W
92%
SRDB-08C250
1.8V
3.3V
8A
14.4W
88%
SRDB-08C180
1.5V
3.3V
8A
12W
86%
SRDB-08C150
1.2V
3.3V
8A
9.6W
83%
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
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
4
V
Vouten
-0.3
4
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-55
100
°C
Continuous Input Voltage
Output Enable Terminal Voltage
Symbol
Min
Vin
Typical
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
Symbol
Min
Typical
Max
Units
All
Vin
3
3. 3
3.6
V
Iin
Input Current
No Load Input Current
A
2.5V
1.8V
1.5V
1.2V
7.9
6.3
5.3
4.4
All
100
mA
Remote Off Input Current
10
20
mA
Input Reflected Ripple Current1
20
40
mArms
Input Reflected Ripple Current (P-P)1
60
100
mApk
I2t Inrush Current Transient
0.05
0.1
A2s
Turn On Voltage Threshold
2.85
V
Turn Off Voltage Threshold
2.3
V
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
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Output Specifications
Parameter
Module
Min
Typical
Max
2.45
1.764
1.47
1.176
2.5
1.8
1.5
1.2
2.55
1.836
1.53
1.224
2.5V
1.8V
1.5V
1.2V
7.0
7.0
6.0
6.0
15
15
15
15
All
2.0
5
2.5V
1.8V
1.5V
1.2V
10
8
5
4
25
20
15
12
Output Voltage Set Point 1
Symbol
Units
Vout
2.5V
1.8V
1.5V
1.2V
V
mV
Load Regulation
Line Regulation
mV
Regulation Over Temperature
mV
mV
Total Output Voltage Regulation
45
40
35
32
2.5V
1.8V
1.5V
1.2V
Output Ripple and Noise 2
mVp-p
2.5V
1.8V
1.5V
1.2V
55
40
40
40
100
75
75
75
Output Ripple and Noise 2
All
10
25
mVrms
Output Current Range
All
Iout
0
8
A
Output DC Current Limit
All
Ioutlim
10.4
20
A
Shor t Circuit Surge
A 2s
Ioutsurge
2.5V
1.8V
1.5V
1.2V
Turn on Time
All
Overshoot at Turn On
All
Output Capacitance
All
Ton
Cout
0
0.06
0.07
0.09
0.15
0.12
0.14
0.18
0.22
10
20
ms
0
3
%
3200
µF
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
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Output Specifications
Parameter
Module
Transient Response
Symbol
Min
Typical
Max
Units
110
150
mV
50
100
µs
110
150
mV
50
100
µs
90
125
mV
50
100
µs
90
125
mV
50
100
µs
90
125
mV
50
100
µs
90
125
mV
50
100
µs
90
125
mV
50
100
µs
90
125
mV
50
100
µs
3
∆V 50% to 100% of Max Load
Settling Time
Ts
2.5V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.8V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.5V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.2V
∆V 100% to 50% of Max Load
Settling Time
Ts
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
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
General Specifications
Parameter
Module
Symbol
Min
Typical
89
85
83
80
92
88
86
83
250
300
Max
Units
η
Efficiency1
%
2.5V
1.8V
1.5V
1.2V
Switching Frequency
All
Fsw
340
kHz
Output Voltage Trim Range2
%
2.5V
1.8V
1.5V
1.2V
80
90
90
90
105
110
110
110
Remote Sense Compensation
%
2.5V
1.8V
1.5V
1.2V
Weight
5
10
10
10
10.5
All
g
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on pages 12-14.
Control Specifications
Parameter
Remote On/Off 3
Module
Symbol
All
Vouten
Min
Typical
Max
Units
V
Signal Low (Unit Off)
All
-0.3
0.8
V
Signal High (Unit On)
All
2.8
4
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
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Efficiency Data
Module 1.8V
Module 2.5V
96%
93%
3.0V
3.3V
3.6V
92%
91%
90%
Efficiency
Efficiency
95%
94%
89%
88%
87%
1.0 2.0 3.0 4.0
93%
92%
91%
90%
89%
88%
87%
86%
85%
84%
83%
3.0V
3.3V
3.6V
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
5.0 6.0 7.0 8.0
Output Current
Output Current
Module 1.2V
92%
91%
90%
89%
88%
87%
86%
85%
84%
83%
82%
81%
80%
3.0V
3.3V
3.6V
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
O utput Current
©2006 Bel Fuse Inc.
Efficiency
Efficiency
Module 1.5V
90%
89%
88%
87%
86%
85%
84%
83%
82%
81%
80%
79%
3.0V
3.3V
3.6V
1.0
2.0
3.0
4.0 5.0
6.0
7.0
8.0
Output Current
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 6
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
Ripple and Noise
1µF ceramic cap and 10µF aluminum electrolytic cap are added at the output.
Ripple and noise at full load and 3.3Vdc input,
2.5Vdc output and Ta=25° C
Ripple and noise at full load and 3.3Vdc input,
1.5Vdc output and Ta=25° C
Ripple and noise at full load and 3.3Vdc input,
1.8Vdc output and Ta=25° C
Ripple and noise at full load and 3.3Vdc input,
1.2Vdc output and Ta=25° C
©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 7
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Transient Response
Transient response: di/dt = 0.5A/µS, external load capacitance Co=470µF (Tantalum capacitor)
Vout=2.5V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.8V
50% to 100% load transients at 3.3V input and Ta=25° C
©2006 Bel Fuse Inc.
Vout=2.5V
100% to 50% load transients at 3.3V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 3.3V input and Ta=25° C
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 8
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
Transient Response
Transient response: di/dt = 0.5A/µS, external load capacitance Co=470µF (Tantalum capacitor)
Vout=1.5V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 3.3V input and Ta=25° C
Vout=1.2V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 3.3V input and Ta=25° C
©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 9
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Thermal Considerations
Derating Curve
100LFM
200LFM
Output Current (A)
8
300LFM
6
4
Natural Convection
2
0
0
10
20
30
40
50
60
70
85
Ambient Temperature, Ta (˚C)
Output Current vs. Local Ambient
Temperature and Air Velocity
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Trim
Gnd
©2006 Bel Fuse Inc.
Vo
Trim
Gnd
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 10
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Output Voltage Set-Point Adjustment
SRDB-08C250 Trim Resistor Calculation
(
Rtrim down =
9.590
– 14.29) Kohm
Vo – Vo, adj
T rim resistor value Rtrim_dow n(Kohm)
300
270
240
210
180
150
120
90
60
30
0
1.9
1.96
2.02
2.52
2.53
2.08 2.14 2.2 2.26 2.32 2.38
A djusted outp ut voltage Vo,adj (V)
2.44
2.5
Rtrim up =
(
T rim resistor value,Rtrim_up(Kohm)
300
4.504
– 8.66) Kohm
Vo, adj – Vo
270
240
210
180
150
120
90
60
30
0
2.5
2.54 2.56 2.58 2.59 2.61
Adjusted output voltage Vo,adj(V)
2.62
2.63
2.65
T rim resistor value Rtrim_dow n(Kohm)
300
270
240
SRDB-08C180 Trim Resistor Calculation
210
180
Rtrim down =
150
120
(
3.869
– 12.5) Kohm
Vo – Vo, adj
90
60
30
0
1.5
1.53
1.56
1.59 1.62 1.65 1.68 1.71 1.74
A djust ed outp ut voltage Vo,adj (V)
1.77
1.8
T rim resistor value,Rtrim_up(Kohm)
300
270
240
Rtrim up =
210
180
(
3.072
– 8.66) Kohm
Vo, adj – Vo
150
120
90
60
30
0
1.8
1.83
1.86
1.89 1.92 1.95 1.98 2.01
Adjusted output voltage Vo,adj(V)
2.04
2.07
2.1
©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 11
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 1.2V – 2.5V Output / 8A
BP06SRDB-08C
Output Voltage Set-Point Adjustment
T rim resistor value Rtrim_down(Kohm)
300
SRDB-08C150 Trim Resistor Calculation
Rtrim down =
(
2.712
– 12.5) Kohm
Vo – Vo, adj
270
240
210
180
150
120
90
60
30
0
1.25
1.27
1.3
1.54
1.58
1.33 1.35 1.38 1.4 1.43 1.45
Adjust ed outp ut voltage Vo,adj (V)
1.48
1.5
Rtrim up =
(
T rim resistor value,Rtrim_up (Kohm)
300
3.072
– 8.66) Kohm
Vo, adj – Vo
270
240
210
180
150
120
90
60
30
0
1.5
300
1.62 1.66
1.7
1.74 1.78
Adjusted output voltage Vo,adj(V)
1.82
1.86
T rim resistor value Rtrim_down(Kohm)
270
240
SRDB-08C120 Trim Resistor Calculation
210
180
150
120
90
Rtrim down =
60
(
1.562
– 8.48) Kohm
Vo – Vo, adj
30
0
1
1.02
1.04
1.06
1.08
1.1
1.12
1.14
Adjusted output voltage Vo,adj (V)
1.16
1.18
1.2
300
T rim resistor value,Rtrim_up (Kohm)
270
240
210
180
Rtrim up =
150
120
(
3.072
– 4.64) Kohm
Vo, adj – Vo
90
60
30
0
1.2
1.22
©2006 Bel Fuse Inc.
1.24
1.26
1.28
1.3
1.32
1.34
Adjusted output voltage Vo,adj(V)
1.36
1.38
1.4
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 12
1.9
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 1.2V – 2.5V Output / 8A
POWER PRODUCTS
BP06SRDB-08C
Mechanical
0.827
[21.00]
0.118 [3.00]
0.197 [5.00]
Pin
Function
1
Ground
2
Ground
3
Ground
4
Ground
5
+Vin
6
+Vin
7
Trim
8
Remote On/Off
9
Remote Sense (+)
10
+Vo
11
+Vo
12
+Vo
0.669
[17.00]
0.102
[2.60]
0.345
[8.75]
0.079
[2.00]
1.22
[31.00]
12 11 10 9 8 7
1 2 3 4 5 6
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other
hazardous substances from electronic products. These parts are not however compatible with
the higher temperatures associated with lead free solder processes and must be soldered using
a reflow profile with a peak temperature of no more than 240ºC.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 06.06
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
page 13