NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
VRBC-16F2Ax Series
• • • • • • • Non-Isolated High Efficiency High Power Density OCP/SCP Fixed Frequency (300 kHz) Flexible Output Voltage Sequencing Remote On/Off
RoHS Compliant
• • • • • • • Under-voltage Lockout (UVLO) Over Temperature Protection Remote Sense Wide Input Wide Trim Converter can sink and source Current Active Low/High (option)
Description
The Bel VRBC-16F2Ax modules are a series of non-isolated dc/dc converters that can deliver up to 16 A of output current with full load efficiency of 94% at 3.3 V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (2.4 V5.5 V). These modules have a sequencing feature that enables designers to implement various types of output voltage sequencing when powering multiple voltages on a board. Their open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote ON/OFF, programmable output voltage and over current protection.
Part Selection
Output Voltage 0.75 V-3.63 V
1
Input Voltage 2.4 V-5.5 V
Max. Output Current 16 A
Max. Output Power 58.1 W
Typical Efficiency 94%
Model Number Active Low VRBC-16F2AL
Model Number Active High VRBC-16F2A0
Model Number Active Low VRBC-16F2AW
2
Notes: 1. These modules use a buck topology, so the output voltages must be 0.8 V less than the input voltage. 2. “W” indicates special coating. 3. Add “G” to the end of the Model Number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Output Enable Terminal Voltage Sequencing Voltage
1
Min -0.3 V -0.3 V -0.3 V -40 °C -55 °C
Typ -
Max 5.8 V 5.8 V Vin 85 °C 125 °C
Notes
Ambient Temperature Storage Temperature
Notes: All specifications are typical at 25 °C unless otherwise stated. 1. VRBC-16F2Ax series of modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When the sequencing feature is not used, tie the SEQ pin to Vin.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
Input Specifications
Parameter Input Voltage Input Current (full load) Vo=3.3 V Vo=1.8 V Vo=0.75 V Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold
2
Min 2.4 V -
Typ 11.23 A 6.47 A 3.08 A 80 mA 10 mA 100 mA 40 mA 0.15 A s 2.2 V 2.0 V
2
Max 5.5 V 12.89 A 13.55 A 6.67 A 22 mA 0.3 A s 2
Notes Vo, set ≤ Vin-0.8 V
Tested with two 100 uF/10 V tantalum input capacitors (P/N: TPSC107K010R0075 AVX) & simulated source impedance of 1 uH, 5 Hz to 20 MHz.
Output Specifications
Parameter Output Voltage Set Point Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40 C to +85 °C) Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise (pk-pk) Ripple and Noise (rms) Turn on Time Overshoot at Turn on Output Capacitance ESR ≥ 1mohm ESR ≥ 10mohm Transient Response 1 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 2 Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time Min -2%Vo,set -3%Vo,set 0A 19 A 0 uF 0 uF Typ 0.4%Vo,set 0.3%Vo,set 0.5%Vo,set 1.6 A2s 25 mV 8 mV 4 mS 0%Vo,set 300 mV 50 uS 300 mV 50 uS 150 mV 100 uS 150 mV 100 uS Max 2%Vo,set 3%Vo,set 16 A 35 A 2 A2s 50 mV 15 mV 8 mS 3%Vo,set 1000 uF 5000 uF di/dt=2.5 A/ uS; Vin=5 V; and with 10 uF/16 V tantalum capacitor & 1 uF/10 V ceramic capacitor at output di/dt=2.5 A/ uS; Vin=5 V; and with two 150 uF/10 V tantalum capacitors & 1 uF/10 V ceramic capacitor at output Tested with 0-20 MHz, 10 uF/16 V tantalum capacitor & 1 uF/10 V TDK ceramic capacitor at output Notes Vin=5 V, lo=lomax full load Over all operating input voltages, resistive loads and temperature conditions Io=Io, min to Io, max Vin=Vin, min to Vin, max Tref=Ta, min to Ta, max
VO=0.75 V 3.3 V
VO=0.75 V 3.3 V
Note: All specifications are typical at nominal input (Vin=5 V), full load at 25 °C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
General Specifications
Parameter Efficiency Vo=3.3 V Vo=1.8 V Vo=0.75 V Switching Frequency Over Temperature Shutdown Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight 2.0 x 0.5 x 0.363 50.80 x 12.7 x 9.23 8.3 g 91% 86% 75% 250 kHz 0.7525 V 94% 89% 78% 300 kHz 125 °C 5,109,613 hours 350 kHz 3.63 V 5% Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) Measured at Vin=5 V, full load Min Typ Max Notes
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit On) Signal High (Unit Off) Sequencing Voltage Sequencing Slew Rate Capability Sequencing Delay Time Tracking Accuracy Power-Up Power-Down 100 mV 200 mV 200 mV 400 mV Min -0.3 V 1.5 V -0.3 V 1.5 V 0.05 V 10 mS Typ Max 0.3 V 5.8 V 0.3 V 5.8 V Vin 2 V/mS Delay from Vin, min to application of voltage on SEQ pin Notes VRBC-16F2A0; Remote On/Off pin open, Unit on. VRBC-16F2AL & VRBC-16F2AW; Remote On/Off pin open, Unit on. Sequencing Voltage should be higher than output voltage.
Output Trim Equations
Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground.
Vout
Rtrim =
21.07 − 5.11 Vadj − 0.7525
Module Trim
GND
Rtrim
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The Trim Up voltage should be connected between the Trim pin and Ground.
Vtrim = 0.7 − 0.1698 × (Vadj − 0.7525)
Vout
Module
Trim
Vtrim
GND
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
Efficiency Data
98.0% 96.0% 94.0% 92.0% 90.0% 88.0% 86.0% 4.5V 84.0% 5.0V 82.0% 5.5V 80.0% 1.6 4.0 8.0 12.0 16.0
Vo=3.3 V
100.0%
95.0%
90.0%
85.0%
80.0% 3.0V 5.0V 5.5V 70.0% 1.6 4.0 8.0 12.0 16.0
75.0%
Vo=1.8 V
95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 1.6 2.4V 5.0V 5.5V
4.0
8.0
12.0
16.0
Vo=0.75 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
Thermal Derating Curves
Vo=3.3 V
Vo=1.8 V
Vo=0.7525 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output
Mechanical Outline
Pin Connections
Pin 1 2 3 4 5 6 7 8 9 10 11 Function Vout Vout Vo,sense Vout Ground Ground Vin Vin SEQ Trim Remote On/Off
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products.
©2006 Bel Fuse Inc. Specifications subject to change without notice. 011906
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
