NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A SRAH-07C / VRAH-07C 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 Industrial temperature range -40° to +85° C
POWER PRODUCTS
BP06xRAH-07C
RoHS Compliant
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
• • • • Distributed power architectures Data networking equipment Telecommunications Computers and peripherals
Options
• Wide range adjustable output
Part Number Selection
Output Voltage 2.5V 1.8V 1.5V 1.2V 0.9V 0.9V - 2.5V Input Voltage 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V Max. Output Current 7A 7A 7A 7A 7A 7A Max. Output Power 17.5W 12.6W 10.5W 8.4W 6.3W 17.5W Typical Efficiency 92% 88% 86% 83% 80% 92% Part Number Surface Mount SRAH-07C250 SRAH-07C180 SRAH-07C150 SRAH-07C120 SRAH-07C090 SRAH-07C1A0
©2006 Bel Fuse Inc.
Part Number Vertical Mount VRAH-07C250 VRAH-07C180 VRAH-07C150 VRAH-07C120 VRAH-07C090 VRAH-07C1A0
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
POWER PRODUCTS
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Absolute Maximum Ratings
Parameter Continuous Input Voltage Output Enable Terminal Voltage Ambient Temperature Storage Temperature Symbol Vin Vouten Tamb Tstor Min -0.3 -0.3 -40 -40 Typical Max 6 6 85 125 Unit V V °C °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 Operating Input Voltage Input Current 2.5V 1.8V 1.5V 1.2V 0.9V No Load Input Current Remote Off Input Current Input Reflected Ripple Current1 Input Reflected Ripple Current (P-P)1 I2t Inrush Current Transient Turn On Voltage Threshold Turn Off Voltage Threshold All All All All All 2.5 2.4 All 7 50 150 0.08 Module All Symbol Vin Iin 6.6 5.3 4.6 3.8 3.0 110 15 80 250 0.16 2.8 mA mA mArms mApk A2s V V Min 3 Typical Max 3.6 Units V A
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
3.3V Input / 0.9V – 2.5V Output / 7A Output Specifications
Parameter Output Voltage Set Point 1 2.5V 1.8V 1.5V 1.2V 0.9V Load Regulation 2.5V 1.8V 1.5V 1.2V 0.9V Line Regulation 2.5V 1.8V 1.5V 1.2V 0.9V Regulation Over Temperature (-40° to +85° C) 3 3 3 1 1 10 10 10 5 5 3 3 3 1 1 10 10 10 5 5 Module Symbol Vout 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 Min Typical Max
POWER PRODUCTS
BP06xRAH-07C
Units V
mV
mV
mV 2.5V 1.8V 1.5V 1.2V 0.9V 20 15 15 10 8 40 30 30 20 15 mV 2.5V 1.8V 1.5V 1.2V 0.9V 26 21 21 12 10 60 50 50 30 25 mVp-p 2.5V 1.8V 1.5V 1.2V 0.9V 40 40 40 40 40 10 Iout Ioutlim Ioutsurge Ton 0 8.4 0.08 7 0 Cout 0 80 80 80 80 70 20 7 16 0.12 15 1 2200 mVrms A A A 2s ms % µF
Total Output Voltage Regulation
Output Ripple and Noise 2
Output Ripple and Noise 2 Output Current Range Output DC Current Limit Shor t Circuit Surge Turn on Time Overshoot at Turn On Output Capacitance
All All All All All All All
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
POWER PRODUCTS
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Output Specifications
Parameter Transient Response
3
Module
Symbol
Min
Typical
Max
Units
∆V 50% to 100% of Max Load Settling Time 2.5V ∆V 100% to 50% of Max Load Settling Time Transient Response
3
120 Ts 40 120 Ts 40
180 80 180 80
mV µs mV µs
∆V 50% to 100% of Max Load Settling Time 1.8V ∆V 100% to 50% of Max Load Settling Time Transient Response
3
120 Ts 40 120 Ts 40
180 80 180 80
mV µs mV µs
∆V 50% to 100% of Max Load Settling Time 1.5V ∆V 100% to 50% of Max Load Settling Time Transient Response
3
100 Ts 40 100 Ts 40
150 80 150 80
mV µs mV µs
∆V 50% to 100% of Max Load Settling Time 1.2V ∆V 100% to 50% of Max Load Settling Time Transient Response
3
50 Ts 40 50 Ts 40
100 80 100 80
mV µs mV µs
∆V 50% to 100% of Max Load Settling Time 0.9V ∆V 100% to 50% of Max Load Settling Time Ts Ts
50 40 50 40
100 80 100 80
mV µs mV µs
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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
General Specifications
Parameter Efficiency1 2.5V 1.8V 1.5V 1.2V 0.9V Switching Frequency Output Voltage Trim Range2 Weight All 1.8V All Fsw Module Symbol η 90 86 84 81 78 250 50 5 92 88 86 83 80 300 340 146 kHz % g Min Typical Max Units %
1. Vin=3.3V, full load and Ta=25° C. 2. See graphs on page 9.
Control Specifications
Parameter Remote On/Off 3 Signal Low (Unit Off) Signal High (Unit On) Module All All All Symbol Vouten -0.3 1.8 1 3.6 Min Typical Max Units V V 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
POWER PRODUCTS
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Efficiency Data
MODULE 2.5V 100% 95% 90% 85% 80% 75% 70% 65% 60% 0.7 1.8 3.5 5.3 7.0 OUTPUT CURRENT
100% 95% EFFICIENCY MODULE 1.8V
EFFICIENCY
3 3.3 3.6
90% 85% 80% 75% 70% 65% 60% 0.7 1.8 3.5 OUTPUT CURRENT 5.3 7.0
3 3.3 3.6
MODULE 1.5V 95% 90% EFFICIENCY 85% 80% 75% 70% 65% 60% 55% 0.7 1.8 3.5 OUTPUT CURRENT 5.3 7.0 3 3.3 3.6
MODULE 1.2V 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.7 1.8 3.5 OUTPUT CURRENT 5.3 7.0
MODULE 0.9V 95% 90% 85% 80% 75% 70% 65% 60% 55% 0.7 1.8 3.5 OUTPUT CURRENT 5.3 7.0 3 3.3 3.6
EFFICIENCY
3 3.3 3.6
©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 6
EFFICIENCY
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
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
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 Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Vo
POWER PRODUCTS
BP06xRAH-07C
Trim Up Test Circuit
Vo
Trim
Trim
Gnd
Gnd
Output Voltage Set-Point Adjustment
xRAH-07C250 Trim Resistor Calculation
Rtrim down =
(
6.4943 – 13.83) Kohm Vo – Vo, adj
Rtrim up =
(
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
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Output Voltage Set-Point Adjustment
xRAH-07C180 Trim Resistor Calculation
Rtrim down =
(
3.8488 – 18.83) Kohm Vo – Vo, adj
Rtrim up =
(
3.064 – 15) Kohm Vo, adj – Vo
xRAH-07C150 Trim Resistor Calculation
Rtrim down =
(
1.7874 – 11.7) Kohm Vo – Vo, adj
Rtrim up =
(
2.088 – 9.09) 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 10
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A Output Voltage Set-Point Adjustment
xRAH-07C120 Trim Resistor Calculation
POWER PRODUCTS
BP06xRAH-07C
Rtrim down =
(
0.622 – 4.15) Kohm Vo – Vo, adj
Rtrim up =
(
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
POWER PRODUCTS
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
Output Voltage Set-Point Adjustment
Trim Down Test Circuit
Vo
Trim Up Test Circuit
Vo
Trim
Trim
Gnd
Gnd
Output Voltage Set-Point Adjustment
xRAH-07C1A0 Trim Resistor Calculation
Rtrim down =
(
3.8488 – 4.091) Kohm Vo – Vo, adj
Rtrim up =
(
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
3.3V Input / 0.9V – 2.5V Output / 7A
POWER PRODUCTS
BP06xRAH-07C
Mechanical
SRAH-07C
Suggested PCB Pad Layout 0.400 [10.16] 0.065 [1.65]
0.60 [15.24]
0.050 [1.27]
0.855 [21.72]
0.110 [2.79]
0.70 [17.78]
R0.015 [R0.38] typ 0.100 [2.54] R0.008 [R0.20] typ
0.012 [0.30]
0˚-5˚
0.004 [0.10]
0.050 [1.27] 0.400 [10.16]
0.100 [2.54] 4x
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 1 2 3 4 5 6 7
Function Remote On/Off +Vin Ground +Vo Trim No Connection No Connection
7
6
12345
©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
BP06xRAH-07C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 0.9V – 2.5V Output / 7A
0.700 [17.78]
Mechanical
VRAH-07C
0.600 [15.24]
0.050 [1.27]
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 1 2 3 4 5
Function Remote On/Off +Vin Ground +Vo Trim
12345
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
Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST
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
EUROPE
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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