NON-ISOLATED DC/DC CONVERTERS
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
SRDB-20ExxH Series
• • • • Non-Isolated OCP/SCP/OVP Low Profile Package Remote On/Off (Active High)
RoHS Compliant
• • • Wide Input Remote Sense
Rev.A
Under-Voltage Lockout (UVLO)
Description
The Bel SRDB-20ExxH is part of the non-isolated dc/dc converter Power Module series. The modules use a DIP package for ease of layout and space savings. The output is closely regulated and the efficiency of 5 Vdc output module is typically 94% at full load.
Part Selection
Output Voltage 5.0 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 1.0 V Input Voltage 8.0 V - 13.2 V 5.8 V - 13.2 V 5.4 V - 13.2 V 5.4 V - 13.2 V 5.4 V - 13.2 V 5.4 V - 13.2 V 5.4 V - 13.2 V Max. Output Current 20 A 20 A 20 A 20 A 20 A 20 A 20 A Max. Output Power 100 W 66 W 50 W 36 W 30 W 24 W 20 W Typical Efficiency 94% 92% 91% 88% 87% 85% 84% Model Number SRDB-20E50H SRDB-20E33H SRDB-20E25H SRDB-20E18H SRDB-20E15H SRDB-20E12H SRDB-20E10H
Notes: 1. Add “R” suffix at the end of the model number to indicate “Reel Packaging”, and “G” for “Tray Packaging”. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -40 °C Typ Max 16 V 16 V 85 °C 125 °C Notes
Input Specifications
Parameter Input Voltage Vo=5.0 V Vo=3.3 V Vo=1.0-2.5 V Input Current (full load) VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Min 8V 5.8 V 5.4 V Typ Max 13.2 V 13.2 V 13.2 V 15.1 A 14.1 A 13.3 A 10.4 A 8.4 A 6.9 A 5.9 A Notes
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Input Specifications (continued)
Parameter Input Current (no load) VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 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 4.35 V 3.65 V
Typ 200 mA 150 mA 135 mA 120 mA 100 mA 85 mA 80 mA 130 mA 40 mA 0.1 A s 4.48 V 3.98 V
2
Max 200 mA 70 mA 0.2 A s 4.60 V 4.30 V
2
Notes
With simulated impedance of 500 nH, 5 Hz to 20 MHz; use two 270 uF/16 V capacitors with ESR=0.018ohm max, at 100 kHz
Note: All specifications are typical at Vin=8 V, full load at 25 °C unless otherwise stated.
Output Specifications
Parameter Output Voltage Set Point VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Line Regulation VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Load Regulation VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Regulation Over Temperature (-40 °C to +85 °C) VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Min 4.900 V 3.234 V 2.450 V 1.764 V 1.470 V 1.176 V 0.980 V Typ 5.0 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 1.0 V ±2 mV ±1 mV ±1 mV ±1 mV ±1 mV ±1 mV ±1 mV ±3 mV ±2 mV ±2 mV ±2 mV ±1 mV ±1 mV ±1 mV ±15 mV ±10 mV ±9 mV ±8 mV ±7 mV ±5 mV ±5 mV Max 5.100 V 3.366 V 2.550 V 1.836 V 1.530 V 1.224 V 1.020 V ±4 mV ±3 mV ±3 mV ±3 mV ±3 mV ±3 mV ±3 mV ±7 mV ±4 mV ±4 mV ±4 mV ±3 mV ±3 mV ±3 mV ±30 mV ±20 mV ±18 mV ±16 mV ±14 mV ±10 mV ±10 mV Notes
Test conditions: Vin=8 V; Iout=half load
-
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Output Specifications (continued)
Parameter Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise (rms) Ripple and Noise (rms) Ripple and Noise (pk-pk) Ripple and Noise (pk-pk) Turn on Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=1.0 V VO=1.2 V VO=1.5 V VO=1.8 V3.3 V VO=5 V 120 mV 50 uS 120 mV 50 uS 100 mV 50 uS 100 mV 50 uS 100 mV 40 uS 100 mV 40 uS 100 mV 40 uS 100 mV 50 uS 90 mV 40uS 90 mV 40 uS 200 mV 100 uS 200 mV 100 uS 150 mV 100 uS 150 mV 100 uS 150 mV 80 uS 150 mV 80 uS 150 mV 80 uS 150 mV 100 uS 130 mV 80 uS 130 mV 80 uS Test conditions: di/dt = 0.5 A/uS; Vin=8 V; with external 680 uF tantalum capacitor. 680 uF
1 1 1 1
Min 0A 24 A -
Typ 0.075 A s 20 mV 10 mV 60 mV 30 mV 20 mS 0% 2
Max 20 A 40 A 0.15 A s 40 mV 20 mV 100 mV 60 mV 40 mS 3% 8000 uF
2
Notes
With 1 uF ceramic capacitor at the output With 680 uF tantalum capacitor at the output With 1 uF ceramic capacitor at the output With 680 uF tantalum capacitor at the output
Notes: All specifications are typical at full load at 25 °C u nless otherwise stated. 1. Test conditions of the output ripple and noise: two 270 uF/16 V capacitors with ESR=0.018 ohm max at the input; Vin=8 V, Io=20 A; 0-20 MHz BW.
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
General Specifications
Parameter Efficiency VO=5.0 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 91% 89% 88% 85% 84% 82% 81% 480 kHz 108.5% 90%VO 94% 92% 91% 88% 87% 85% 84% 600 kHz 115% 3,154,461 hours Inches (L × W × H) Millimeters (L × W × H) Weight 1.22 x 0.827 x 0.345 30.99 x 21.0 x 8.76 11 g 720 kHz 120% 110%VO 10% Calculated Per Bell Core SR-332 (IO = 16 A, Vin=8 V, Vo=3.3 V; Ta = 25 °C) Min Typ Max Notes
Measured at Vin=8 V at full load.
Switching Frequency
Over Voltage Protection (Latch) Output Trim Range Remote Sense Compensation MTBF Dimensions
Can be reset by cycling the input supply voltage or remote on/off.
-
Note: All specifications are typical at 25 °C unless otherwise stated.
Control Specifications
Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Min 0V 2.5 V Typ Max 1V 13.2 V Notes Remote on/off pin open, unit on.
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application.
A Rtrim _ down = ( − B) K Vnom − Vadj
Rtrim_ up = ( C − D) Vadj − Vnom
Vout Rtrimdown Module Trim GND
Vout Module Trim Rtrimup GND
Vnom 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V
A 30.955 3.961 1.834 1.927 1.353 0.099 0.102
B 15.805 3.407 3.397 6.916 5.851 0.446 0.684
C 5.884 1.266 0.861 1.533 1.533 0.196 0.401
D 8.450 1.825 2.320 5.000 3.935 0.201 0.183
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Efficiency Data
Efficiency Curve
Efficiency Curve
100.0% 96.0% Efficiency 92.0% 88.0% 84.0% 80.0% 76.0% 72.0% 2 4 6 8 10 12 14 16 18 20 Output Current (A)
Efficiency
100.0% 96.0% 92.0% 88.0% 84.0% 80.0% 76.0% 72.0% 68.0% 2 4 6 8 10 12 14 16 18 20 Output Current (A)
8.0 V 10.8 V 13.2 V
5.8 V 8.0 V 13.2 V
Vo=5.5 V
Efficiency Curve
Vo=3.3 V
Efficiency Curve
98.0% 94.0% 90.0% Efficiency 86.0% 82.0% 78.0% 74.0% 70.0% 2 4 6 8 10 12 14 16 18 20 Output Current (A)
92.0%
5.4 V 8.0 V 13.2 V
88.0% Efficiency 84.0% 80.0% 76.0% 72.0% 68.0% 2 4 6 8 10 12 14 16 18 20
5.4 V 8.0 V 13.2 V
Output Current (A)
Vo=2.5 V
Efficiency Curve
Vo=1.8 V
Efficiency Curve
94.0%
92.0%
90.0% 86.0% Efficiency 82.0% 78.0% 74.0% 70.0% 66.0% 2 4 6 8 10 12 14 16 18 20
5.4 V 8.0 V 13.2 V
88.0% 84.0% Efficiency 80.0% 76.0% 72.0% 68.0% 64.0% 2 4 6 8 10 12 14 16 18 20 Output Current (A)
5.4 V 8.0 V 13.2 V
Output Current (A)
Vo=1.5V
Efficiency Curve
Vo=1.2 V
92.0% 88.0% 84.0% Efficiency 80.0% 76.0% 72.0% 68.0% 64.0% 60.0% 2 4 6 8 10 12 14 16 18 20 Output Current (A)
5.4 V 8.0 V 13.2 V
Vo=1.0 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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Thermal Derating Curves
SRDB-20E10H (Vin=8 V)
SRDB-20E12H (Vin=8 V)
SRDB-20E15H (Vin=8 V)
SRDB-20E18H (Vin=8 V)
SRDB-20E25H (Vin=8 V)
SRDB-20E33H (Vin=8 V)
SRDB-20E50H (Vin=8 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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Ripple and Noise Waveforms
Ripple and noise at max load 5 Vdc output
Ripple and noise at max load 3.3 Vdc output
Ripple and noise at max load 2.5 Vdc output
Ripple and noise at max load 1.8 Vdc output
Ripple and noise at max load 1.5 Vdc output .
Ripple and noise at max load 1.2 Vdc output
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Ripple and Noise Waveforms (continued)
Ripple and noise at max load 1.0 Vdc output Note: Ripple and Noise at 8 V input, with 680 uF tantalum capacitor at the output, and Ta=25 deg C.
Transient Response Waveforms
Transients 50% to 100% load 5 Vdc output
Transients 100% to 50% load 5 Vdc output
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Transient Response Waveforms (continued)
Transients 50% to 100% load 3.3 Vdc output
Transients 100% to 50% load 3.3 Vdc output
Transients 50% to 100% load 2.5 Vdc output
Transients 100% to 50% load 2.5 Vdc output
Transients 50% to 100% load 1.8 Vdc output
Transients 100% to 50% load 1.8 Vdc output
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Transient Response Waveforms (continued)
Transients 50% to 100% load 1.5 Vdc output
Transients 100% to 50% load 1.5 Vdc output
Transients 50% to 100% load 1.2 Vdc output
Transients 100% to 50% load 1.2 Vdc output
Transients 50% to 100% load 1.0 Vdc output
Transients 100% to 50% load 1.0 Vdc output
Note: Transient response at 8 V input, di/dt=0.5 A/uS, with external 680 uF tantalum capacitor, Ta=25 deg C.
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
5.4 Vdc - 13.2 Vdc Input 1.0 Vdc - 5.0 Vdc Output / 20 A
Mechanical Outline
Pin Connections
Pin 1 2 3 4 5 6 7 8 9 10 11 12 Function Vo Vo Ground Ground Ground Vin Vin Ground Ground Remote On/Off Trim Remote Sense (+)
Note: Though there are 5 GND pins (3,4,5,8,9), it is highly recommended that all of them should be used in the system
application, because of the current and the thermal conduction.
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.
©2007 Bel Fuse Inc. Specifications subject to change without notice. 031907
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
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