BEL VRAH

NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
SRAH-07C / VRAH-07C 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
•
Industrial temperature range -40° to +85° C
Description
The Bel SRAH-07C and VRAH-07C 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 0.9V to 2.5V. They are packaged in a compact, overmolded package rated at 7A. Optional lead forming provides a vertical mount product for minimal
footprint or a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit
protection, 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
Options
•
Distributed power architectures
•
•
Data networking equipment
•
Telecommunications
•
Computers and peripherals
Wide range adjustable output
Part Number Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
2.5V
3.3V
7A
17.5W
92%
SRAH-07C250
VRAH-07C250
1.8V
3.3V
7A
12.6W
88%
SRAH-07C180
VRAH-07C180
1.5V
3.3V
7A
10.5W
86%
SRAH-07C150
VRAH-07C150
1.2V
3.3V
7A
8.4W
83%
SRAH-07C120
VRAH-07C120
0.9V
3.3V
7A
6.3W
80%
SRAH-07C090
VRAH-07C090
0.9V - 2.5V
3.3V
7A
17.5W
92%
SRAH-07C1A0
VRAH-07C1A0
©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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Absolute Maximum Ratings
Parameter
Max
Unit
-0.3
6
V
Vouten
-0.3
6
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-40
125
°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
All
Vin
3
Input Current
Typical
Max
Units
3.6
V
Iin
No Load Input Current
A
2.5V
1.8V
1.5V
1.2V
0.9V
6.6
5.3
4.6
3.8
3.0
All
110
mA
7
15
mA
Remote Off Input Current
Input Reflected Ripple Current1
All
50
80
mArms
Input Reflected Ripple Current (P-P)1
All
150
250
mApk
I2t Inrush Current Transient
All
0.08
0.16
A2s
Turn On Voltage Threshold
All
2.8
V
Turn Off Voltage Threshold
All
2.5
2.4
V
Note: Input capacitance 270µF/16V, ESR = 0.03 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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Output Specifications
Parameter
Module
Min
Typical
Max
2.450
1.764
1.470
1.176
0.882
2.500
1.800
1.500
1.200
0.900
2.550
1.836
1.530
1.224
0.918
2.5V
1.8V
1.5V
1.2V
0.9V
3
3
3
1
1
10
10
10
5
5
2.5V
1.8V
1.5V
1.2V
0.9V
3
3
3
1
1
10
10
10
5
5
2.5V
1.8V
1.5V
1.2V
0.9V
20
15
15
10
8
40
30
30
20
15
2.5V
1.8V
1.5V
1.2V
0.9V
26
21
21
12
10
60
50
50
30
25
2.5V
1.8V
1.5V
1.2V
0.9V
40
40
40
40
40
80
80
80
80
70
Output Ripple and Noise 2
All
10
20
mVrms
Output Current Range
All
Iout
0
7
A
Output DC Current Limit
All
Ioutlim
8.4
16
A
Shor t Circuit Surge
All
Ioutsurge
0.08
0.12
A 2s
Turn on Time
All
Ton
7
15
ms
Overshoot at Turn On
All
0
1
%
Output Capacitance
All
2200
µF
Output Voltage Set Point 1
Symbol
Units
Vout
2.5V
1.8V
1.5V
1.2V
0.9V
V
Load Regulation
mV
Line Regulation
Regulation Over Temperature
(-40° to +85° C)
mV
mV
Total Output Voltage Regulation
mV
Output Ripple and Noise 2
mVp-p
Cout
0
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. 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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Output Specifications
Parameter
Module
Transient Response
Symbol
Min
Typical
Max
Units
120
180
mV
40
80
µs
120
180
mV
40
80
µs
120
180
mV
40
80
µs
120
180
mV
40
80
µs
100
150
mV
40
80
µs
100
150
mV
40
80
µs
50
100
mV
40
80
µs
50
100
mV
40
80
µs
50
100
mV
40
80
µs
50
100
mV
40
80
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
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
0.9V
∆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.
©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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
General Specifications
Parameter
Module
Symbol
Min
Typical
90
86
84
81
78
92
88
86
83
80
250
300
Max
Units
η
Efficiency1
%
2.5V
1.8V
1.5V
1.2V
0.9V
Switching Frequency
All
Output Voltage Trim Range2
Fsw
1.8V
Weight
50
340
kHz
146
%
5
All
g
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on page 9.
Control Specifications
Parameter
Remote On/Off 3
Module
Symbol
All
Vouten
Min
Typical
Max
Units
V
Signal Low (Unit Off)
All
-0.3
1
V
Signal High (Unit On)
All
1.8
3.6
V
3. With remote on/off pin 1 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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Efficiency Data
MODULE 1.8V
100%
95%
100%
95%
90%
85%
80%
75%
70%
65%
60%
90%
85%
EFFICIENCY
EFFICIENCY
MODULE 2.5V
3
3.3
3.6
3
80%
75%
70%
3.3
3.6
65%
60%
0.7
1.8
3.5
5.3
7.0
0.7
1.8
3.5
5.3
7.0
OUTPUT CURRENT
OUTPUT CURRENT
MODULE 1.5V
95%
EFFICIENCY
90%
85%
80%
3
75%
3.3
70%
3.6
65%
60%
55%
0.7
1.8
3.5
5.3
7.0
OUTPUT CURRENT
MODULE 0.9V
90%
85%
80%
75%
70%
65%
60%
55%
50%
3
3.3
3.6
EFFICIENCY
EFFICIENCY
MODULE 1.2V
95%
90%
85%
3
80%
75%
70%
65%
3.3
3.6
60%
55%
0.7
1.8
3.5
5.3
7.0
OUTPUT CURRENT
©2006 Bel Fuse Inc.
0.7
1.8
3.5
5.3
7.0
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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
Ripple and Noise
1µF ceramic cap and 10µF aluminum cap added at the output.
Ripple and noise at full load and 3.3Vdc input,
1.8Vdc output and Ta=25° C
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=1.8V
50% to 100% 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
©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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Thermal Considerations
SRAH-07C
VRAH-07C
©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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Vo
Trim
Trim
Gnd
Gnd
Output Voltage Set-Point Adjustment
xRAH-07C250 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
6.4943
– 13.83) Kohm
Vo – Vo, adj
3.064
– 10) Kohm
Vo, adj – Vo
©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
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Output Voltage Set-Point Adjustment
xRAH-07C180 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
3.8488
– 18.83) Kohm
Vo – Vo, adj
3.064
– 15) Kohm
Vo, adj – Vo
xRAH-07C150 Trim Resistor Calculation
Rtrim down =
Rtrim up =
©2006 Bel Fuse Inc.
(
(
1.7874
– 11.7) Kohm
Vo – Vo, adj
2.088
– 9.09) Kohm
Vo, adj – Vo
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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
Output Voltage Set-Point Adjustment
xRAH-07C120 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
0.622
– 4.15) Kohm
Vo – Vo, adj
1.232
– 2.61) Kohm
Vo, adj – Vo
xRAH-07C090 Trim Resistor Calculation
Rtrim up =
(
0.3064
– 0.178) Kohm
Vo, adj – Vo
©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
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Trim Up Test Circuit
Vo
Trim
Gnd
Vo
Trim
Gnd
Output Voltage Set-Point Adjustment
xRAH-07C1A0 Trim Resistor Calculation
Rtrim down =
Rtrim up =
(
(
3.8488
– 4.091) Kohm
Vo – Vo, adj
3.064
– 0.261) Kohm
Vo, adj – Vo
Note: Default output voltage of SRAH-07C1A0 is 1.8V
©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 12
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
Mechanical
SRAH-07C
Suggested PCB Pad Layout
0.400
[10.16]
0.60
[15.24]
0.050
[1.27]
0.065 [1.65]
0.110
[2.79]
0.855
[21.72]
R0.015
[R0.38] typ
0.70
[17.78]
R0.008
[R0.20] typ
0.100 [2.54]
0.012
[0.30]
0˚-5˚
0.004 [0.10]
0.050
[1.27]
0.100
[2.54]
4x
0.400
[10.16]
0.320
[8.13] 0.020
[0.51]
0.055 [1.40] 2x
0.090 [2.29] 2x
0.780
[19.81]
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
Pin
Function
1
Remote On/Off
2
+Vin
3
Ground
4
+Vo
5
Trim
6
No Connection
7
No Connection
7
6
1 2 3 4 5
©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
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 0.9V – 2.5V Output / 7A
BP06xRAH-07C
0.700
[17.78]
Mechanical
VRAH-07C
0.050
[1.27]
0.600
[15.24]
0.265
[6.73]
min
0.050 [1.27]
0.100 [2.54]
0.400 [10.16]
0.020
[0.51]
0.308
[7.82]
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
Pin
Function
1
Remote On/Off
2
+Vin
3
Ground
4
+Vo
5
Trim
1 2 3 4 5
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
page 14