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NON-ISOLATED DC/DC CONVERTERS
4.5V-32V Input 1.2V-5.0V/3A Output
x7AH-03H Series
* * * * Non-Isolated High Efficiency High Power Density Excellent Thermal Performance * * * * Remote On/Off Input Under Voltage Lockout OCP/SCP Low Cost
Description
The Bel x7AH-03Hxx0 is part of the low cost non-isolated DC/DC power converter series. It is packaged in a compact, overmolded package rated at 3A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency of 3.3V output is typically 90% at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection.
Part Selection
Output Voltage 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V Input Voltage 8.0V - 32V 4.9V - 32V 4.5V -32V 4.5V -32V 4.5V - 32V 4.5V - 32V Max. Output Current 3A 3A 3A 3A 3A 3A Max. Output Power 15W 10W 7.5W 5.4W 4.5W 3.6W Typical Efficiency 92% 90% 88% 85% 83% 81% Part Number Surface Mount S7AH-03H500 S7AH-03H330 S7AH-03H250 S7AH-03H180 S7AH-03H150 S7AH-03H120 Part Number Vertical Mount V7AH-03H500 V7AH-03H330 V7AH-03H250 V7AH-03H180 V7AH-03H150 V7AH-03H120
Note: Add "0" suffix at the end of the model number to indicate "Tube Packaging", and "R" for "Reel Packaging", and "G" for "Tray Packaging".
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3V -0.3V -40C -40C Typ Max 34V 12V 85C 125C Notes
Input Specifications
Parameter Input Voltage Input Current (no load) Input Current (full load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (RMS) I2t Inrush Current Transient Turn on Voltage Threshold 1 Turn off Voltage Threshold 2 Min 4.5V Typ 30mA 4mA 200mA 100mA 0.02A s 4.1V 3.3V
2
Max 32V 3A 400mA 150mA 0.1A2s 4.5V 4.0V
Notes See "Part Selection" for more details.
Tested with simulated source impedance of 500nH, 5Hz to 20MHz and two 100uF/50V electrolytic capacitors and a 3.3uF/50V ceramic capacitor at the input.
Notes: 1. The max Turn on Voltage threshold of the 3.3V & 5.0V output module will be relaxed to 4.9V & 8.0V
respectively. 2. The max Turn off Voltage threshold of the 3.3V output module will be relaxed to 4.5V. The 5.0V output module does not have such function.
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
4.5V-32V Input 1.2V-5.0V/3A Output
Output Specifications
Parameter Output Voltage Set Point VO=5.0V VO=3.3V VO=2.5V VO=1.8V VO=1.5V Vo=1.2V Line Regulation VO=5.0V VO=1.2-3.3V Load Regulation VO=5.0V VO=1.2-3.3V Regulation Over Temperature (-40C to +85C) Output Current Current Limit Threshold Short Circuit Surge Transient VO=1.2V-5.0V Ripple and Noise (RMS) VO=1.2V-5.0V Ripple and Noise (pk-pk) VO=1.2V-5.0V 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 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=1.2V 1.5V VO=1.8V 2.5V VO=3.3V VO=5.0V 150mV 100uS 150mV 100uS 130mV 100uS 130mV 100uS 100mV 50uS 100mV 50uS 90mV 40uS 90mV 40uS 200mV 150uS 200mV 150uS 180mV 150uS 180mV 150uS 150mV 100uS 150mV 100uS 140mV 80uS 140mV 80uS Test conditions: di/dt = 0.5A/uS; Vin = 12V; with a 220uF Tantalum capacitor at the output. 220uF 60mV 15mS 2% 100mV 50mS 5% 1200uF 25mV 50mV 0A 3.3A Min 4.900V 3.234V 2.450V 1.764V 1.470V 1.176V Typ 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 10mV 5mV 10mV 5mV 30mV 0.02A2s Max 5.100V 3.366V 2.550V 1.836V 1.530V 1.224V 15mV 10mV 15mV 10mV 50mV 3A 9A 0.1A2s Tested with 0-20MHz BW, with a 220uF tantalum capacitor at the output. Notes
Test conditions: Vin=12V, Io=50% full load
Note: All specifications are typical at nominal input, full load at 25C 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
4.5V-32V Input
Parameter Efficiency VO=5.0V VO=3.3V VO=2.5V VO=1.8V VO=1.5V Vo=1.2V Switching Frequency Output Trim Range (narrow trim) MTBF Dimensions (surface mount) Inches (L x W x H) Millimeters (L x W x H) Dimensions (vertical) Inches (L x W x H) Millimeters (L x W x H) Weight 89% 87% 85% 82% 80% 78% 200KHz 90%Vo 92% 90% 88% 85% 83% 81% 300KHz 400KHz 110%Vo Calculated Per Bell Core TR-332 (IO = Nominal; Ta = 25C) Measured at Vin=12V, full load and Ta=25C
1.2V-5.0V/3A Output
Min Typ Max Notes
General Specifications
8,120,000 hours
0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 5.1g
-
-
Control Specifications
Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Min -0.3V 2.8V Typ Max 1V 12V 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) 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.
Rtrimdown
A = -B Vnom - Vadj
Vout Rtrimdown Module Trim GND
Rtrimup =
Vadj
C -D - Vnom
A
61.850 53.840 9.556 3.849 3.102 1.794
Vout Module Trim Rtrimup GND
Vnom
5.0 3.3 2.5 1.8 1.5 1.2
B
29.400 61.700 15.620 13.830 14.420 10.910
C
11.760 17.200 4.496 3.064 3.536 3.536
D
14.700 40.200 10.000 10.000 10.000 6.490
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
4.5V-32V Input 1.2V-5.0V/3A Output
Efficiency Data
5.0V Module 100.0% 90.0% 80.0% Efficiency 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8 1.5 Output Current 2.3 3.0
Efficiency 100.0% 90.0%
3.3V Module
8V 12V 24V 32V
80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8 1.5 Output Current 2.3 3.0
4.9V 12V 24V 32V
2.5V Module 100.0% 90.0% 80.0% Efficiency 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8 1.5 Output Current 2.3 3.0 4.5V 12V 24V 32V
Efficiency 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8
1.8V Module
4.5V 12V 24V 32V
1.5 Output Current
2.3
3.0
1.5V Module 100.0% 90.0% 80.0% Efficiency 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8 1.5 Output Current 2.3 3.0 4.5V
Efficiency 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 0.3 0.8
1.2V Module
4.5V 12V 24V 32V
12V 24V 32V
1.5 Output Current
2.3
3.0
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
4.5V-32V Input 1.2V-5.0V/3A Output
Thermal Derating Curve
Vin=24V
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
4.5V-32V Input 1.2V-5.0V/3A Output
bel
Pin Connections
Pin 1 2 3 4 5 6 7 Function Remote On/Off (option) Vin Ground Vout Trim (option) N/A N/A
bel
Pin Connections
Pin Function Remote On/Off (option) Vin Ground Vout Trim (option)
bel
1 2 3 4 5
(c)2004 Bel Fuse Inc. Specifications subject to change without notice. 121704
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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