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NON-ISOLATED DC/DC CONVERTERS
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
SRDB-30B1AH
* * * * Non-Isolated Under-Voltage lockout (UVLO) Wide Output Over voltage protection
RoHS Compliant
* * * * Remote Sense OCP/SCP Low profile package Remote On/Off (Active High)
Description
The Bel SRDB-30B1AH 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 can be trimmed from 0.9 V to 2.75 V and the efficiency of 2.5 V output module is typically 93% at full load. Typical features include remote on/off, over current protection and short circuit protection.
Part Selection
Output Voltage 0.9 V - 2.75 V Input Voltage 4.5 V - 5.5 V Max. Output Current 30 A Max. Output Power 82.5 W Typical Efficiency 93% Model Number Active High SRDB-30B1AH
Note: Add "R" suffix at the end of the model number to indicate "Reel Packaging", and "G" for "Tray Packaging".
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.5 V -40 C -40 C Typ Max 7V 7V 85 C 125 C Notes
Input Specifications
Parameter Input Voltage Input Current (full load) Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Input Current (no load) Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V 220 mA 200 mA 180 mA 160 mA 140 mA Min 4.5 V Typ Max 5.5 V 20.4 A 15.0 A 12.9 A 10.6 A 9.05 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Input Specifications (continued)
Parameter Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold
2
Min -
Typ 120 mA
Max 160 mA
Notes
4.3 V 3.4 V
12 mA 25 mA 29 mA 32 mA 36 mA 0.1 A s 4.4 V 3.7 V
2
25 mA 50 mA 58 mA 64 mA 72 mA 0.2 A s 4.5 V 4.3 V
2
With simulated source impedance of 500 nH, 5 Hz to 20 MHz. Use two 270 uF/16 V capacitors with ESR=0.018 ohm max. at 100 kHz.
Note: All specifications are typical at 25 C unless otherwise stated.
Output Specifications
Parameter Output Voltage Set Point Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Line Regulation Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Load Regulation Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Regulation Over Temperature Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Output Current Current Limit Threshold 0A 36 A 5 mV 4 mV 4 mV 3 mV 3 mV 15 mV 12 mV 8 mV 6 mV 6 mV 10 mV 8 mV 7 mV 6 mV 5 mV 30 mV 24 mV 16 mV 12 mV 12 mV 30 A 55 A Input Voltage Range:4.75 V-5.5 V 2 mV 2 mV 1 mV 1 mV 1 mV 5 mV 4 mV 3 mV 2 mV 2 mV 2.450 V 1.764 V 1.470 V 1.176 V 0.980 V 2.5 V 1.8 V 1.5 V 1.2 V 1.0 V 2.550 V 1.836 V 1.530 V 1.224 V 1.020 V Vin=5 V, lout=half load. Min Typ Max Notes
Note: All specifications are typical 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Output Specifications (continued)
Parameter Transient Response Ripple and Noise (rms) Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Ripple and Noise (pk-pk) Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time VO=1.0 V VO=1.2 V VO=1.5 V VO=1.8 V VO=2.5 V 100 mV 60 uS 100 mV 60 uS 100 mV 50 uS 100 mV 50 uS 90 mV 50 uS 90 mV 50 uS 90 mV 50 uS 90 mV 50 uS 80 mV 50 uS 80 mV 50 uS 150 mV 100 uS 150 mV 100 uS 150 mV 100 uS 150 mV 100 uS 140 mV 100 uS 140 mV 100 uS 140 mV 100 uS 140 mV 100 uS 130 mV 100 uS 130 mV 100 uS Test conditions: di/dt=0.5 A/uS, Vin= 5 V, Ta=25 C with external 680 uF tantalum capacitance. 680 uF 15 mV 20 mV 25 mV 25 mV 25 mV 0.1 A s 6 mS 0%
2
Min
Typ
Max
Notes
-
3 mV 5 mV 7 mV 7 mV 7 mV
6 mV 10 mV 14 mV 14 mV 14 mV 30 mV 40 mV 50 mV 50 mV 50 mV 0.2 A s 10 mS 3% 12000 uF
2
Test conditions: two 270 uF/16 V capacitors with ESR=0.018 ohm max at the input; Vin=5 V, lo=30 A, 0-20 MHz BW.
Note: All specifications are typical at full load, 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
General Specifications
Parameter Efficiency Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=1.0 V Switching Frequency Over Voltage Protection (Latch) Output Voltage Trim Range Remote Sense Compensation MTBF Dimensions Inches millimeters Weight 1.22 x 0.67 x 0.345 31.0 x 17.0 x 8.75 11 g Body outline
1
Min 90% 88% 86% 85% 82% 480 kHz 108.5% 0.9 V -
Typ 93% 91% 89% 88% 85% 600 kHz 115% 3,078,055 hours
Max 720 kHz 120% 2.75 V 10%
Notes
Vin=5 V, full load.
Vo=1.2 V when trim pin is open. Calculated Per Bell Core SR-332 (Vin=5 V; IO = 24 A, Vo=1.2 V; Ta = 25 C)
Notes: All specifications are typical at 25 C unless otherwise stated. 1. The OVP latch can be reset by cycling the input supply voltage or remote on/off.
Control Specifications
Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit Off) Signal High (Unit On) Vin=4.5 V Vin=5.5 V -0.3 V 3.15 V -0.3 V 3.85 V 1.35 V 5.5 V 1.65 V 5.5 V Min Typ Max Notes
Remote on/off pin open, unit on.
Output Trim Equations
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) 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.
RTrimDown =
0.774 - 2.075 Vo - Vadj
Vout Rtrimdown
RTrimUp =
1.533 - 0.158 Vadj - Vo
Vout
Module
Trim GND
Module
Trim GND Rtrimup
Note: Vo is the nominal output voltage set point when trim pin is open, Vo=1.204 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Efficiency Data
Module 2.5V 96.0% 94.0% 92.0% EFFICIENCY
Module 1.8V 94.0% 92.0% 90.0% EFFICIENCY
4.5V 5.0V 5.5V
90.0% 88.0% 86.0% 84.0% 82.0% 80.0% 78.0% 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 OUTPUT CURRENT
88.0% 86.0% 84.0% 82.0% 80.0% 78.0% 76.0% 74.0% 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 OUTPUT CURRENT
4.5V 5.0V 5.5V
Vo=2.5 V
Vo=1.8 V
Module 1.5V 92.0% 90.0% 88.0% 4.5V 5.0V 5.5V
Module 1.2V 92.0% 90.0% 88.0% 86.0% EFFICIENCY 84.0% 82.0% 80.0% 78.0% 76.0% 74.0% 72.0% 70.0% 4.5V 5.0V 5.5V
EFFICIENCY
86.0% 84.0% 82.0% 80.0% 78.0% 76.0% 74.0% 72.0% 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 OUTPUT CURRENT
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
OUTPUT CURRENT
Vo=1.5 V
Vo=1.2 V
Module 1.0V 90.0% 88.0% 86.0% EFFICIENCY 84.0% 82.0% 80.0% 78.0% 76.0% 74.0% 72.0% 70.0% 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 OUTPUT CURRENT 4.5V 5.0V 5.5V
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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Thermal Derating Curve
Note: Derating curve is for 2.5 V output and tested at nominal input voltage.
Ripple and Noise Waveforms
Vo=2.5 V
Vo=1.8 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Ripple and Noise Waveforms (continued)
Vo=1.5 V
Vo=1.2 V
Vo=1.0 V
Note: Ripple and Noise at full load, Vin=5 V, Io=30 A, Ta=25 with external 680 uF tantalum capacitor.
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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Transient Response Waveforms
Transients 50% to 100% load 2.5 V Output
Transients 100% to 50% load 2.5 V Output
Transients 50% to 100% load 1.8 V Output
Transients 100% to 50% load 1.8 V Output
Transients 50% to 100% load 1.5 V Output
Transients 100% to 50% load 1.5 V 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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
Transient Response Waveforms (continued)
Transients 50% to 100% load 1.2 V Output
Transients 100% to 50% load 1.2 V Output
Transients 50% to 100% load 1.0 V Output
Transients 100% to 50% load 1.0 V Output
Note: Vin=5 V, Ta=25, with external 680 uF tantalum capacitor.
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
4.5 V - 5.5 V Input 0.9 V - 2.75 V/30 A Output
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 240C.
(c)2006 Bel Fuse Inc. Specifications subject to change without notice. 041206
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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