BEL VRAH

NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
3.3V Input / 5V Output / 1.5A
BP05xRAH-02C
SRAH-02C / VRAH-02C Modules
•
Nonisolated
•
Compact, low profile surface mount package
•
Fixed frequency*
•
High efficiency means less power dissipation
•
Excellent thermal performance
•
Optimized for cost
•
Allows burst mode operation at low load currents
Description
The Bel SRAH-02C and VRAH-02C modules are non-isolated, step up DC/DC power converters that operate from a nominal
3.3V source with an output voltage of 5V. They are packaged in a compact, overmolded package rated at 1.5A. Optional lead
forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard
features include output voltage adjust and industrial temperature range (-40° to +85° C). The output is closely regulated and
the efficiency is typically 87% at full load. 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.
*Optional Burst/skip mode operating at light load or no load.
Applications
Options
•
Distributed power architectures
•
•
Data networking equipment
•
Telecommunications
•
Computers and peripherals
Trim function
Part Number Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
5V
3.3V
1.5A
7.5W
87%
SRAH-02C500
VRAH-02C500
Note: For parts with Burst/skip mode disabled, change the last character to a B (e.g. SRAH-02C50B).
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
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 / 5V Output / 1.5A
BP05xRAH-02C
Absolute Maximum Ratings
Parameter
Continuous Input Voltage
Output Enable Terminal Voltage
Symbol
Min
Vin
2.8
Typical
Max
Unit
4
V
Vouten
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-40
125
°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
Module
Symbol
Min
Operating Input Voltage
All
Vin
3
Input Current
All
Iin
Input Reflected Ripple Current1
All
Input Reflected Ripple Current (P-P)1
Typical
Max
Units
3.6
V
3.3
A
30
60
mArms
All
100
150
mApk
I2t Inrush Current Transient
All
0.02
0.05
A2s
Turn On Voltage Threshold
All
2.8
2.9
V
Note: Input capacitance one 270µF/16V, ESR = 0.018 Ω max at 100kHz @ 25° C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
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 / 5V Output / 1.5A
BP05xRAH-02C
Output Specifications
Parameter
Module
Symbol
Min
Typical
Max
Units
Output Voltage Set Point 1
All
Vout
4.825
5
5.175
V
Load Regulation
All
25
40
mV
Line Regulation
All
20
30
mV
Regulation Over Temperature
All
45
80
mV
Total Output Voltage Regulation
All
150
mV
Output Ripple and Noise 2
All
50
100
mVp-p
Output Ripple and Noise 2
All
15
25
mVrms
Output Current Range
All
1.5
A
Overshoot at Turn On
All
5
%
Output Capacitance
All
600
µF
100
150
mV
50
100
µs
100
150
mV
50
100
µs
Iout
0
0
Cout
0
Transient Response
∆V 50% to 100% of Max Load
Settling Time
Ts
All
∆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.
1. Vin = 3.3V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap on output.
General Specifications
Parameter
Module
Symbol
Min
Typical
Efficiency1
All
η
84
87
Switching Frequency
All
Fsw
500
550
Output Voltage Trim Range2
All
Weight
All
95
Max
Units
%
650
110
5.2
kHz
%
g
1. Vin=3.3V, full load and Ta=25° C.
2. See graphs on page 6.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
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 / 5V Output / 1.5A
BP05xRAH-02C
Efficiency Data
Module 5.0V
89%
88%
Efficiency
87%
3.0V
86%
3.3V
85%
3.6V
84%
83%
82%
0.150
0.375
0.750
1.125
1.500
Output current (A)
Ripple and Noise
1µF ceramic cap at the output.
Ripple and noise at full load and 3.3Vdc input,
5Vdc output and Ta=25° C
©2005 Bel Fuse Inc.
Ripple and noise when operating in burst mode at no
load and 3.3Vdc input, 5Vdc output and Ta=25° C
Specifications subject to change without notice. 03.05
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 / 5V Output / 1.5A
POWER PRODUCTS
BP05xRAH-02C
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=5V
50% to 100% load transients at 3.3V input and Ta=25° C
Vout=5V
100% to 50% load transients at 3.3V input and Ta=25° C
Thermal Considerations
xRAH-02C
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
BP05xRAH-02C
Trim Down Circuit
Output Voltage Set-Point Adjustment
Vout
Rtrim Down
Trim
Gnd
Trim Up Circuit
Vout
Module
Trim
Rtrim Up
Gnd
xRAH-02C Trim Resistor Calculation
Rtrim down =
Rtrim up =
©2005 Bel Fuse Inc.
(
(
44.144
– 12.5) Kohm
Vo – Vo, adj
8.4
– 2) Kohm
Vo, adj – Vo
Specifications subject to change without notice. 03.05
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
3.3V Input / 5V Output / 1.5A
BP05xRAH-02C
Mechanical
SRAH-02C
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
N/A
2
+Vin
3
Ground
4
+Vo
5
Trim
6
N/A
7
N/A
7
6
1 2 3 4 5
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
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
3.3V Input / 5V Output / 1.5A
BP05xRAH-02C
0.700
[17.78]
Mechanical
VRAH-02C
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
N/A
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.
©2005 Bel Fuse Inc.
Specifications subject to change without notice. 03.05
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 8