BEL X7AH

NON-ISOLATED DC/DC CONVERTERS
3.0 V-3.6 V Input
5.0 V/3 A Output
x7AH-03C500
•
Non-Isolated
•
High Efficiency
•
Fixed Frequency (530 kHz)
•
Low Profile Package
•
Allows Burst Mode Operation
at Low Load Currents
•
Trim Function (Option)
Description
The Bel x7AH-03C500 is a part of the low cost non-isolated dc/dc converter series. The modules use a SMD or
SIP package for ease of layout and space savings. The output is closely regulated and the efficiency is typically
90% at full load.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
5.0 V
3.0 V – 3.6 V
3A
15 W
90%
S7AH-03C500
V7AH-03C500
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
Min
Typ
Max
Input Voltage (continuous)
Parameter
2.8 V
-
4.0 V
Ambient Temperature
0 °C
-
70 °C
Storage Temperature
-40 °C
-
125 °C
Notes
Input Specifications
Parameter
Min
Typ
Max
Input Voltage
3.0 V
-
3.6 V
Input Current
-
-
6.3 A
-
30 mA
60 mA
-
100 mA
150 mA
I t Inrush Current Transient
-
0.02 A s
0.05 A s
Turn-on Voltage Threshold
-
2.8 V
2.9 V
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
2
2
Notes
2
Note: The input reflected ripple current is measured with simulated source impedance of 500 nH, 5 Hz to 20
MHz; Use one 270 uF/16 V capacitor with ESR = 0.018 ohm max. at 100KHz at 25°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
3.0 V-3.6 V Input
5.0 V/3 A Output
Output Specifications
Parameter
Min
Typ
Max
4.875 V
5.0 V
5.125 V
Load Regulation
-
25 mV
50 mV
Line Regulation
-
20 mV
40 mV
Regulation Over Temperature
(0 °C to 70 °C)
-
20 mV
30 mV
0A
-
3A
-
15 mV
25 mV
-
100 mV
70 mV
100 mV
Rise Time
-
30 mS
50 mS
Overshoot at Turn on
-
0%
5%
0 uF
-
1500 uF
-
100 mV
150 mV
-
50 uS
120 uS
-
100 mV
150 mV
-
50 uS
120 uS
Output Voltage Set Point
Output Current
1
Ripple and Noise (RMS)
Notes
1
Ripple and Noise (pk-pk)
2
Burst Mode
Fixed Frequency
Output Capacitance
Io = 0 A
Io = 3 A
Transient Response
50% ~ 100% Max Load
Settling Time
100% ~ 50% Max Load
VO=5 V
Settling Time
di/dt = 0.5 A/uS; Vin = 3.3 V;
Ta = 25 °C without external
capacitor
Notes: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
1. Test condition of the output ripple and noise: 0-20 MHz BW.
2. Recommend a 220 uF capacitor at output if the module operates at burst mode (light load).
General Specifications
Parameter
Min
Typ
Max
87%
90%
-
Switching Frequency
460 kHz
530 kHz
630 kHz
Output Trim Range
90% VO
-
110% VO
Notes
Efficiency
VO=5.0 V
MTBF
Dimensions (surface mount)
Inches (L × W × H)
Millimeters (L × W × H)
Dimensions (vertical)
Inches (L × W × H)
Millimeters (L × W × H)
Weight
Calculated Per Bell Core TR-332
(Vin=3.3 V; Vo=5 V; IO = 2.4 A; Ta = 25
°C)
8,100,000 hours
0.78 x 0.7 x 0.32
19.81 x 17.78 x 8.13
0.7 x 0.308 x 0.65
17.78 x 7.82 x 16.51
-
5.2 g
-
Note: All specifications are typical at nominal input, 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
3.0 V-3.6 V Input
5.0 V/3 A Output
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.
Vout
Rtrim − down = (
Rtrim-down
12.033
− 7.8)
Vo − Vadj
Module
Trim
GND
Vout
Rtrim − up
3.808
=(
− 4.64)
Vadj − Vo
Module
Trim
Rtrim-up
GND
Note: Output voltage Vo=5.0128 V when Rtrim is open.
Efficiency Data
Vo=5.0V efficiency curve
Efficiency
90.0%
3.0 V
3.3 V
3.6 V
85.0%
80.0%
75.0%
0.300
0.750
1.500 2.250
3.000
Iout (A)
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
3.0 V-3.6 V Input
5.0 V/3 A Output
Thermal Derating Curve
x7AH-03C500
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
3.0 V-3.6 V Input
5.0 V/3 A Output
S7AH-03C500
bel
Pin Connections
V7AH-03C500
Pin
Function
1
N/A
2
Vin
3
Ground
4
Vout
5
Trim
6
N/A
7
N/A
bel
bel
Pin Connections
Pin
Function
1
N/A
2
Vin
3
Ground
4
Vout
5
Trim
2005 Bel Fuse Inc. Specifications subject to change without notice. 040805
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
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
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