BEL SRDB

NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.2V – 5.0V Output / 7A
POWER PRODUCTS
BP06SRDB-07A
SRDB-07A Series
RoHS Compliant
•
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-07A modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal
12V source. These converters are available in a range of output voltages from 1.2V to 5.0V. They are packaged in a compact,
low profile, surface mount DIP package for ease of layout and space savings. 7A 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 12V 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
5.0V
12V
7A
35.0W
92%
SRDB-07A500
3.3V
12V
7A
23.1W
90%
SRDB-07A330
2.5V
12V
7A
17.5W
88%
SRDB-07A250
1.8V
12V
7A
12.6W
83%
SRDB-07A180
1.5V
12V
7A
10.5W
82%
SRDB-07A150
1.2V
12V
7A
8.4W
81%
SRDB-07A120
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
15
V
Vouten
-0.3
15.3
V
Ambient Temperature
Tamb
0
70
°C
Storage Temperature
Tstor
-40
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
10.8
12
13.2
V
A
Iin
Input Current
4.0
2.6
2.0
1.7
1.4
1.3
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
mA
No Load Input Current
50
45
35
30
30
30
65
60
50
45
45
45
1
4
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
20
15
12
12
12
12
30
25
25
20
20
20
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
70
50
45
35
35
35
120
100
100
60
60
60
0.08
0.16
A2s
10.4
V
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
Remote Off Input Current
Input Reflected Ripple Current1
mA
mArms
Input Reflected Ripple Current (P-P)1
mApk
I2t Inrush Current Transient
Turn On Voltage Threshold
Turn Off Voltage Threshold
8.2
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.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
Output Specifications
Parameter
BP06SRDB-07A
Module
Min
Typical
Max
4.900
3.247
2.460
1.771
1.476
1.181
5.00
3.30
2.50
1.80
1.50
1.20
5.100
3.353
2.540
1.829
1.524
1.219
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
15
10
9
9
9
9
30
16.5
15
15
15
15
All
3
10
Output Voltage Set Point 1
Symbol
Vout
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
V
Load Regulation
Line Regulation
Units
mV
Regulation Over Temperature
mV
mV
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
50
33
25
18
15
12
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
90
59.5
50
43
40
37
Total Output Voltage Regulation
mV
Output Ripple and Noise 2
mVp-p
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
75
60
60
60
60
60
125
100
100
100
100
100
Output Ripple and Noise 2
All
15
30
mVrms
Output Current Range
All
Iout
0
7
A
Output DC Current Limit
All
Ioutlim
9.1
12
16
A
1.2
1.0
0.9
0.7
0.7
0.6
1.7
1.5
1.4
1.2
1.2
1.1
45
30
30
30
30
30
75
50
50
50
50
50
A2s
Ioutsurge
Shor t Circuit Surge
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
Turn on Time
Ton
ms
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
Overshoot at Turn On
All
Output Capacitance
All
Cout
0
3
%
3500
µF
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 12V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 0.1µF ceramic cap and 10µF aluminum cap on output.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Output Specifications
Parameter
Module
Symbol
Min
Typical
Max
Units
125
250
mV
25
50
µs
125
250
mV
25
50
µs
100
165
mV
25
50
µs
100
165
mV
25
50
µs
100
150
mV
25
50
µs
100
150
mV
25
50
µs
100
150
mV
30
70
µs
100
150
mV
30
70
µs
100
150
mV
30
70
µs
100
150
mV
30
70
µs
110
150
mV
30
70
µs
110
150
mV
30
70
µs
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
5.0V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response 3
∆V 50% to 100% of Max Load
Settling Time
Ts
3.3V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
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 220µF Tantalum cap at output.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
General Specifications
Parameter
Module
Symbol
Min
Typical
89
87
85
80
79
78
92
90
88
83
82
81
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
285
280
238
180
180
180
355
330
280
210
210
210
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
90
70
70
90
90
90
Max
Units
η
Efficiency1
%
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
Switching Frequency
kHz
Fsw
425
380
322
240
240
240
Output Voltage Trim Range2
%
Remote Sense Compensation
All
Weight
All
110
110
110
120
120
110
%
10
10.8
g
1. Vin=12V, full load and Ta=25° C.
2. See graphs on pages 10-13.
Control Specifications
Parameter
Remote On/Off 3
Module
Symbol
All
Vouten
Min
Typical
Max
Units
V
Signal Low (Unit Off)
All
0
1
V
Signal High (Unit On)
All
2.5
13.2
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. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Efficiency Data
Module 3.3V
Module 5.0V
94%
Efficiency
92%
10.8v
12.0v
90%
13.2V
88%
86%
84%
1
2
3
4
5
6
Output Current
7
94%
92%
90%
88%
86%
84%
82%
80%
78%
10.8V
12.0V
13.2V
1
8
2
3
4
12.0V
13.2V
Efficiency
Efficiency
10.8V
85%
80%
75%
8
3
4
5
6
Output Current
7
90%
88%
86%
84%
82%
80%
78%
76%
74%
10.8V
12.0V
13.2V
1
8
2
3
4
5
6
7
8
Output Current
Module 1.5V
Module 1.2V
90%
10.8V
84%
12.0V
13.2V
79%
74%
Efficiency
89%
Efficiency
7
Module 1.8V
90%
2
6
Output Current
Module 2.5V
1
5
10.8V
85%
12.0V
13.2V
80%
75%
1
2
3
4
5
6
7
8
Output Current
©2006 Bel Fuse Inc.
1
2
3
4
5
6
7
8
Output Current
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
POWER PRODUCTS
BP06SRDB-07A
Ripple and Noise
0.1µF ceramic cap and 10µF aluminum electrolytic cap added at the output.
Ripple and noise at full load and 12Vdc input,
5.0Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
3.3Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
2.5Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
1.8Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
1.5Vdc output and Ta=25° C
Ripple and noise at full load and 12Vdc input,
1.2Vdc output and Ta=25° C
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Transient Response
Transient response: di/dt = 0.5A/µS, external load capacitance Co=220µF aluminum cap at output
Vout=5.0V
50% to 100% load transients at 12V input and Ta=25° C
Vout=5.0V
100% to 50% load transients at 12V input and Ta=25° C
Vout=3.3V
50% to 100% load transients at 12V input and Ta=25° C
Vout=3.3V
100% to 50% load transients at 12V input and Ta=25° C
Vout=2.5V
50% to 100% load transients at 12V input and Ta=25° C
Vout=2.5V
100% to 50% load transients at 12V input and Ta=25° C
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
POWER PRODUCTS
BP06SRDB-07A
Transient Response
Transient response: di/dt = 0.5A/µS, external load capacitance Co=470µF (Tantalum capacitor)
Vout=1.8V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 12V input and Ta=25° C
Vout=1.5V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 12V input and Ta=25° C
Vout=1.2V
50% to 100% load transients at 12V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 12V input and Ta=25° C
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Thermal Considerations
Derating Curve
100LFM
7
Output Current (A)
6
5
4
3
2
Natural Convection
1
0
0
20
10
30
40
60
50
70
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. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Trim resistor value Rtrim_down(Kohm)
Output Voltage Set-Point Adjustment
SRDB-07A500 Trim Resistor Calculation
Rtrim down =
(
10.52
– 4.55) Kohm
Vo – Vo, adj
45
40.01
35.02
30.02
25.03
20.03
15.04
10.04
5.04
0.05
3.5
3.65
3.8
3.95
4.1
4.25
4.4
4.55
Adjusted output voltage Vo,adj (V)
4.7
4.85
5
5
5.05
5.1
5.15
5.2
5.25
5.3
5.35
Adjusted output voltage Vo,adj(V)
5.4
5.45
5.5
100
Rtrim up =
(
Trim resistor value,Rtrim_up(Kohm)
90.1
2
– 2.05) Kohm
Vo, adj – Vo
80.2
70.3
60.4
50.5
40.6
30.7
20.8
10.9
Trim resistor value Rtrim_down(Kohm)
1
45
40.01
SRDB-07A330 Trim Resistor Calculation
35.02
30.02
Rtrim down =
25.03
20.03
(
5.08
– 4.55) Kohm
Vo – Vo, adj
15.04
10.04
5.04
0.05
2.31
2.41
2.51
2.61 2.71 2.8
2.9
3
3.1
Adjusted output voltage Vo,adj (V)
3.2
3.3
Trim resistor value,Rtrim_up(Kohm)
100
90.1
80.2
70.3
60.4
Rtrim up =
50.5
(
3.175
– 2.05) Kohm
Vo, adj – Vo
40.6
30.7
20.8
10.9
1
3.3
3.33
3.37
3.4 3.43 3.46 3.5 3.53
Adjusted output voltage Vo,adj(V)
3.56
3.6
3.63
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
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
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
SRDB-07A250 Trim Resistor Calculation
Rtrim down =
(
3.926
– 4.64) Kohm
Vo – Vo, adj
Trim resistor value Rtrim_down(Kohm)
Output Voltage Set-Point Adjustment
45
40.01
35.02
30.02
25.03
20.03
15.04
10.04
5.04
0.05
1.75
1.83
1.9
2.52
2.55
1.98 2.05 2.13 2.2 2.27 2.35
Adjusted output voltage Vo,adj (V)
2.42
2.5
2.58 2.6 2.63 2.65 2.67
Adjusted output voltage Vo,adj(V)
2.73
2.75
Rtrim up =
Trim resistor value,Rtrim_up(Kohm)
100
4.02
– 1.47) Kohm
Vo, adj – Vo
(
91
82
73
64
55
46
37
28
19
10
2.5
2.7
Trim resistor value Rtrim_down(Kohm)
150
135.5
SRDB-07A180 Trim Resistor Calculation
121
106.5
92
77.5
Rtrim down =
63
48.5
3.869
– 11.34) Kohm
Vo – Vo, adj
34
19.5
5
1.62
Trim resistor value,Rtrim_up(Kohm)
(
1.64
1.66
1.67 1.69 1.71 1.73 1.75 1.76
Adjusted output voltage Vo,adj (V)
1.78
1.8
90.02
80.04
70.06
60.08
50.1
Rtrim up =
40.12
(
3.072
– 7.5) Kohm
Vo, adj – Vo
30.14
20.16
10.18
0.2
1.8
1.84
©2006 Bel Fuse Inc.
1.87
1.91 1.94 1.98 2.02 2.05
Adjusted output voltage Vo,adj(V)
2.09
2.12
2.16
Specifications subject to change without notice. 02.06
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 12
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
Output Voltage Set-Point Adjustment
Trim resistor value Rtrim_down(Kohm)
200
SRDB-07A150 Trim Resistor Calculation
Rtrim down =
(
2.704
– 11.34) Kohm
Vo – Vo, adj
180.5
161
141.5
122
102.5
83
63.5
44
24.5
Rtrim up =
(
Trim resistor value,Rtrim_up(Kohm)
5
1.35
3.072
– 7.5) Kohm
Vo, adj – Vo
1.37
1.38
1.4 1.41 1.43 1.44 1.46 1.47
Adjusted output voltage Vo,adj (V)
1.49
1.5
1.59 1.62 1.65 1.68 1.71
Adjusted output voltage Vo,adj(V)
1.77
1.8
90.02
80.04
70.06
60.08
50.1
40.12
30.14
20.16
10.18
0.2
1.5
1.53
1.56
1.74
Trim resistor value Rtrim_down(Kohm)
SRDB-07A120 Trim Resistor Calculation
90.01
80.02
70.03
60.04
Rtrim down =
50.05
(
0.874
– 6.58) Kohm
Vo – Vo, adj
40.06
30.07
20.08
10.09
0.1
1.08
1.09
1.1
1.12 1.13 1.14 1.15 1.16 1.18
Adjusted output voltage Vo,adj (V)
1.19
1.2
Trim resistor value,Rtrim_up(Kohm)
200
180.1
160.2
140.3
Rtrim up =
120.4
100.5
(
1.728
– 4.42) Kohm
Vo, adj – Vo
80.6
60.7
40.8
20.9
1
1.2
1.21
1.22
1.24 1.25 1.26 1.27 1.28
Adjusted output voltage Vo,adj(V)
1.3
1.31
1.32
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 02.06
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 13
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.2V – 5.0V Output / 7A
BP06SRDB-07A
1.22 [30.99]
Mechanical
Suggested PCB Pad Layout
0.394 [10.01]
0.197 [5.00]
0.895
[22.73]
0.67
[17.00]
0.100
[2.54]
0.120 [3.05]
0˚- 5˚
0.004 [0.10]
5X
0.197
[5.00]
6X
0.102
[2.59]
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
0.985 [25.02]
0.345
[8.76]
0.010
[0.25]
2X 0.050 [1.27]
2X 0.079 [1.99]
0.827
[21.01]
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
12 11 10
9
8
7
3
4
5
6
1
2
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. 02.06
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
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