BEL S7DB-08B

NON-ISOLATED DC/DC CONVERTERS
5V Input / 1.2V – 3.3V Output / 8A
POWER PRODUCTS
BP02S7DB-08B
S7DB-08B 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 S7DB-08B modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 5V
source. These converters are available in a range of output voltages from 1.2V to 3.3V. 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 5V 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
3.3V
5V
8A
26.4W
93%
S7DB-08B330
2.5V
5V
8A
20W
91%
S7DB-08B250
1.8V
5V
8A
14.4W
87%
S7DB-08B180
1.5V
5V
8A
12W
86%
S7DB-08B150
1.2V
5V
8A
9.6W
83%
S7DB-08B120
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
6
V
Vouten
-0.3
6
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
4.5
5
5.5
V
Iin
3.3V
2.5V
1.8V
1.5V
1.2V
Input Current
No Load Input Current
All
7.2
5.6
4.6
3.9
3.0
50
A
mA
Remote Off Input Current
4
8
mA
Input Reflected Ripple Current1
30
50
mArms
Input Reflected Ripple Current (P-P)1
60
100
mApk
I2t Inrush Current Transient
0.05
0.07
A2s
Turn On Voltage Threshold
4.3
4.5
V
Turn Off Voltage Threshold
3.85
4.49
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.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Output Specifications
Parameter
Module
Min
Typical
Max
3.234
2.45
1.764
1.47
1.176
3.3
2.5
1.8
1.5
1.2
3.366
2.55
1.836
1.53
1.224
3.3V
2.5V
1.8V
1.5V
1.2V
4.0
4.0
3.0
3.0
3.0
10
10
8
8
8
All
2.0
5
3.3V
2.5V
1.8V
1.5V
1.2V
20
15
12
10
10
40
30
25
20
20
Output Voltage Set Point 1
Symbol
Units
Vout
3.3V
2.5V
1.8V
1.5V
1.2V
V
mV
Load Regulation
Line Regulation
mV
Regulation Over Temperature
mV
mV
Total Output Voltage Regulation
55
45
38
33
33
3.3V
2.5V
1.8V
1.5V
1.2V
2
All
30
50
mVp-p
Output Ripple and Noise 2
All
10
20
mVrms
Output Current Range
Al l
Iout
0
8
A
Output DC Current Limit
Al l
Ioutlim
10.4
20
A
Output Ripple and Noise
Shor t Circuit Surge
A2s
Ioutsurge
3.3V
2.5V
1.8V
1.5V
1.2V
Turn on Time
All
Overshoot at Turn On
Al l
Output Capacitance
Al l
Ton
Cout
0
0.1
0.3
0.4
0.5
0.6
0.3
0.6
0.8
1.0
1.2
12
20
ms
0
3
%
3200
µF
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 5V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Output Specifications
Parameter
Module
Transient Response
Symbol
Min
Typical
Max
Units
90
120
mV
25
50
µs
90
120
mV
25
50
µs
90
120
mV
25
50
µs
90
120
mV
25
50
µs
70
100
mV
25
50
µs
70
100
mV
25
50
µs
70
100
mV
25
50
µs
70
100
mV
25
50
µs
70
100
mV
25
50
µs
70
100
mV
25
50
µs
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 without external load capacitance.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
General Specifications
Parameter
Module
Symbol
Min
Typical
90
88
84
83
80
93
91
87
86
83
Fsw
260
300
3.3V
2.5V
1.8V
1.5V
1.2V
70
70
90
90
90
Max
Units
η
Efficiency1
%
3.3V
2.5V
1.8V
1.5V
1.2V
Switching Frequency
All
340
kHz
All
Output Voltage Trim Range2
Remote Sense Compensation
All
Weight
All
%
110
110
120
120
110
10
%
10.5
g
1. Vin=5.0V, 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 On)
All
0
1
V
Signal High (Unit Off)
All
2.5
5.5
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.
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Efficiency Data
Module 3.3V
97.0%
96.0%
95.0%
4.5V
94.0%
5.0V
93.0%
5.5V
92.0%
91.0%
90.0%
1
2
3
4
5
6
7
8
Module 2.5V
95.0%
94.0%
93.0%
92.0%
4.5V
91.0%
5.0V
90.0%
5.5V
89.0%
88.0%
87.0%
1
2
3
4
5
6
7
8
Module 1.8V
94.0%
92.0%
90.0%
88.0%
86.0%
84.0%
82.0%
80.0%
4.5V
5.0V
5.5V
1
©2002 Bel Fuse Inc.
2
3
4
5
6
7
8
Specifications subject to change without notice. 06.02
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
POWER PRODUCTS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Efficiency Data
Module 1.5V
92.0%
91.0%
90.0%
89.0%
88.0%
87.0%
86.0%
85.0%
84.0%
4.5V
5.0V
5.5V
1
2
3
4
5
6
7
8
Module 1.2V
90.0%
88.0%
4.5V
5.0V
86.0%
5.5V
84.0%
82.0%
1
2
3
4
5
6
7
8
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 7
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Ripple and Noise
Ripple and noise at full load and 5Vdc input,
3.3Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
2.5Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
1.8Vdc output and Ta=25° C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
POWER PRODUCTS
BP02S7DB-08B
Ripple and Noise
Ripple and noise at full load and 5Vdc input,
1.5Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
1.2Vdc output and Ta=25° C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 9
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Transient Response
Transient response: di/dt = 0.5A/µS
Vout=3. 3V
50% to 100% load transients at 5V input and Ta=25° C
Vout=2.5V
50% to 100% load transients at 5V input and Ta=25° C
©2002 Bel Fuse Inc.
Vout=3.3V
100% to 50% load transients at 5V input and Ta=25° C
Vout=2.5V
100% to 50% load transients at 5V input and Ta=25° C
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
POWER PRODUCTS
BP02S7DB-08B
Transient Response
Transient response: di/dt = 0.5A/µS
Vout=1.8V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.5V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 5V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 5V input and Ta=25° C
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Transient Response
Transient response: di/dt = 0.5A/µS
Vout=1.2V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 5V input and Ta=25° C
Thermal Considerations
100LFM
200LFM
Derating Curve
300LFM
Output Current (A)
8
6
4
Natural Convection
2
0
0
30
60
65
70
75
80
85
Ambient Temperature, Ta (˚C)
Output Current vs. Local Ambient
Temperature and Air Velocity
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Vo
Trim
Trim
Gnd
Gnd
Rtrim down =
(
7.964
– 6.82) Kohm
Vo – Vo, adj
Trim resistor value Rtrim down (Kohm)
S7DB-08B330 Trim Resistor Calculation
270
240
210
180
150.01
120.01
90.01
60.01
30.01
0.01
2.31 2.41
2.51 2.61 2.71
2.8
2.9
3
3.1
3.2
3.3
Rtrim up =
(
2.536
– 3.65) Kohm
Vo, adj – Vo
Trim resistor value Rtrim up (Kohm)
Adjusted Output Voltage Vo,adj (V)
270
240
210
180
150.01
120.01
90.01
60.01
30.01
0.01
3.3
3.33
3.37
3.4
3.43
3.46
3.5
3.53
3.56
3.6
3.63
Adjusted Output Voltage Vo,adj (V)
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 13
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
S7DB-08B250 Trim Resistor Calculation
Rtrim down =
(
3.691
– 4.12) Kohm
Vo – Vo, adj
Trim resistor value Rtrim down (Kohm)
Output Voltage Set-Point Adjustment
270
240
210
180
150.01
120.01
90.01
60.01
30.01
0.01
1.75 1.83
1.9
1.98 2.05
2.13
2.2
2.27 2.35 2.42
2.5
Adjusted Output Voltage Vo,adj (V)
Rtrim up =
(
Trim resistor value Rtrim up (Kohm)
270
1.728
– 1.96) Kohm
Vo, adj – Vo
240
210
180
150.01
120.01
90.01
60.01
30.01
0.01
2.5
2.52
2.55
2.58
2.6
2.63
2.65 2.67
2.7
2.73 2.75
Trim resistor value Rtrim down (Kohm)
Adjusted Output Voltage Vo,adj (V)
270
240
210
180
S7DB-08B180 Trim Resistor Calculation
150.01
120.01
Rtrim down =
90.01
60.01
(
1.52
– 4.12) Kohm
Vo – Vo, adj
30.01
0.01
1.62 1.64
1.66
1.67 1.69 1.71 1.73 1.75 1.76 1.78
1.8
Trim resistor value Rtrim up (Kohm)
Adjusted Output Voltage Vo,adj (V)
270
240
210
180
150.01
Rtrim up =
120.01
(
1.208
– 2.61) Kohm
Vo, adj – Vo
90.01
60.01
30.01
0.01
1.8
1.84 1.87
1.91
1.94 1.98
2.02 2.05
2.09 2.12 2.16
Adjusted Output Voltage Vo,adj (V)
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 14
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Output Voltage Set-Point Adjustment
S7DB-08B150 Trim Resistor Calculation
Rtrim down =
(
0.749
– 3.21) Kohm
Vo – Vo, adj
Trim resistor value Rtrim down (Kohm)
270
240
210
180
150.01
120.01
90.01
60.01
30.01
0.01
1.35 1.37
1.38
1.4
1.41 1.43 1.44 1.46
1.47 1.49
1.5
Rtrim up =
(
0.848
– 2.15) Kohm
Vo, adj – Vo
Trim resistor value Rtrim up (Kohm)
Adjusted Output Voltage Vo,adj (V)
270
240
210
180
150.01
120.01
90.01
60.01
30.01
Trim resistor value Rtrim down (Kohm)
0.01
1.5
1.53
1.56 1.59 1.62 1.65 1.68 1.71
Adjusted Output Voltage Vo,adj (V)
1.74
1.77
1.8
S7DB-08B120 Trim Resistor Calculation
270
240
210
180
150.01
Rtrim down =
120.01
90.01
(
1.562
– 8.48) Kohm
Vo – Vo, adj
60.01
30.01
0.01
1.08 1.09
1.1
1.12 1.13 1.14 1.15 1.16 1.18 1.19 1.2
Trim resistor value Rtrim up (Kohm)
Adjusted Output Voltage Vo,adj (V)
270
240
210
180
Rtrim up =
150.01
(
3.064
– 4.64) Kohm
Vo, adj – Vo
120.01
90.01
60.01
30.01
0.01
1.2
1.21 1.22 1.24 1.25 1.26
1.27 1.28
1.3
1.31 1.32
Adjusted Output Voltage Vo,adj (V)
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 15
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
5V Input / 1.2V – 3.3V Output / 8A
BP02S7DB-08B
Mechanical
0.827
[21.00]
0.118 [3.00]
0.197 [5.00]
0.079
[2.00]
1.22
[31.00]
0.345
[8.75]
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]
12 11 10 9 8 7
1 2 3 4 5 6
©2002 Bel Fuse Inc.
Specifications subject to change without notice. 06.02
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 16