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
9.0V-18V Input
5V/1A & 9V/1A & 12V/1A Output
Non-Isolated
Low Profile Package
High
Efficiency
Remote
On/Off
Fixed Frequency (450kHz)
Active
Low/High
Description
The Bel x7AH-01Kxx0 is part of the low cost non-isolated DC/DC converter series. The modules use a SMD or
vertical package for ease of layout and space savings. The output is closely regulated and the efficiency of 12V
output module is typically 87% 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
5V
9V 18V
1A
5W
81%
S7AH-01K50x
V7AH-01K50x
9V
9V 18V
1A
9W 86%
S7AH-01K90x
V7AH-01K90x
12V
9V 18V
1A
12W
87%
S7AH-01KX2x
V7AH-01KX2x
Note: Use "0" to replace "x" in the above part number to indicate Active High, and "L" to indicate Active Low.
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
Min
Typ
Max
Notes
Input Voltage (continuous)
-0.3V
-
24V
Remote On/Off
-0.3V
-
24V
Ambient Temperature
-40
C
-
85
C
Storage Temperature
-40
C
-
125
C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
9V
-
18V
Input Current (no load)
-
30mA
45mA
Input Current (full load)
Vo=5.0V
Vo=9.0V
Vo=12.0V
-
-
-
-
-
-
0.8A
1.3A
1.8A
Input Reflected Ripple Current (pk-pk)
Vo=5.0V
Vo=9.0V
Vo=12.0V
-
-
-
55mA
75mA
95mA
80mA
110mA
130mA
Input Reflected Ripple Current (RMS)
Vo=5.0V
Vo=9.0V
Vo=12.0V
-
-
-
15mA
20mA
30mA
25mA
30mA
40mA
With simulated source impedance
of 500nH, 5Hz to 20MHz; Use one
100uF/25V tantalum capacitor at
the input.
I
2
t Inrush Current Transient
-
0.003A
2
s 0.01A
2
s
Turn-on Voltage Threshold
8.0V
8.5V
8.8V
Turn-off Voltage Threshold
7.2V
7.6V
8.2V
Note:
All specifications are typical at 25
C unless otherwise stated.
x7AH-01K Series
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
9.0V-18V Input
5V/1A & 9V/1A & 12V/1A Output
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
4.90V
8.82V
11.76V
5V
9V
12V
5.10V
9.18V
12.24V
Test condition:
Vin=12V, lout=full load
Line Regulation
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
8mV
15mV
20mV
15mV
25mV
35mV
Load Regulation
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
15mV
25mV
35mV
25mV
45mV
60mV
Regulation Over Temperature
(-40
C to +85
C)
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
50mV
70mV
90mV
80mV
100mV
140mV
Output Current
0.005A -
1A
Output DC Current Limit
1.1A
-
1.8A
Ripple and Noise (RMS)
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
3mV
3mV
4mV
5mV
5mV
6mV
Ripple and Noise (pk-pk)
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
10mV
15mV
20mV
15mV
20mV
30mV
Test conditions:
BW = 0-20MHz; with
filter
(Co1=10uF, L=0.47uH,
Co2=10uF) at the output
Ripple and Noise (RMS)
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
15mV
25mV
35mV
25mV
35mV
50mV
Ripple and Noise (pk-pk)
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
40mV
70mV
110mV
70mV
100mV
160mV
Test conditions:
BW = 0-20MHz; with two
10uF ceramic capacitors at
the output
Turn On Time
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
-
-
-
20mS
30mS
30mS
30mS
45mS
45mS
Overshoot at Turn on
-
0%
5%
Output Capacitance
0uF
-
47uF
Transient Response
Overshoot -
200mV
300mV
50% ~ 75%
Max Load
Settling Time
-
100uS
150uS
Overshoot -
200mV
300mV
75% ~ 50%
Max Load
Settling Time
5.0V
- 100uS
150uS
Overshoot -
300mV
400mV
50% ~ 75%
Max Load
Settling Time
-
150uS
200uS
Overshoot -
300mV
400mV
75% ~ 50%
Max Load
Settling Time
9.0V
- 150uS
200uS
Overshoot -
350mV
500mV
50% ~ 75%
Max Load
Settling Time
-
150uS
200uS
Overshoot -
350mV
500mV
75% ~ 50%
Max Load
Settling Time
12.0V
- 150uS
200uS
di/dt = 0.5A/uS; Vin =
12V; and with two 10uF
ceramic capacitors at the
output
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
9.0V-18V Input
5V/1A & 9V/1A & 12V/1A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
V
O
=5.0V
V
O
=9.0V
V
O
=12.0V
77%
82%
83%
81%
86%
87%
-
-
-
Measured at Vin=12V, full load
Switching Frequency
400KHz
450KHz
480KHz
MTBF
14,760,000 hours
Calculated Per Bell Core TR-332 (I
O
=
Nominal; T
a
= 25
C)
Dimensions (surface mount)
Inches (L
W
H)
Millimeters (L
W
H)
0.78 x 0.7 x 0.32
19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L
W
H)
Millimeters (L
W
H)
0.7 x 0.308 x 0.65
17.78 x 7.82 x 16.51
Weight -
5g
-
Note:
All specifications are typical at 25
C unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit On)
-0.3V
-
0.4V
Signal High (Unit Off)
2.5V
-
Vin
x7AH-01KxxL Remote On/Off pin open, unit
on.
Signal Low (Unit Off)
-0.3V
-
0.4V
Signal High (Unit On)
2.5V
-
Vin
x7AH-01Kxx0 Remote On/Off pin open, unit
on.
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
9.0V-18V Input
5V/1A & 9V/1A & 12V/1A Output
Efficiency Data
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
0.100
0.250
0.500
0.750
1.000
Output current (A)
Ef
f
i
c
i
e
n
c
y
9V
12V
18V
x7AH-01K500
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
0.100
0.250
0.500
0.750
1.000
9V
12V
18V
x7AH-01K900
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
0.100
0.250
0.500
0.750
1.000
9V
12V
18V
x7AH-01KX20
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
9.0V-18V Input
5V/1A & 9V/1A & 12V/1A Output
Thermal Derating Curves
Vin=12.0V, Vo=5.0V
Vin=12.0V, Vo=9.0V
Vin=12.0V, Vo=12.0V
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