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
2.5V Input
0.9V-1.65V/10A Output
Non-Isolated
Remote
On/Off
Low profile package (7.82mm)
Short circuit protection
Fixed frequency (300KHz)
Over
current
protection
Under-voltage lockout (UVLO)
Trim
Function
Description
The Bel x7AH-10Jxx0 is part of the low cost non-isolated DC/DC power 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 of
1.5V output is typically 88% at full load. Typical features include remote on/off, input under voltage lockout, over
current protection and short circuit protection.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Surface Mount
Part Number
Vertical Mount
1.5V 2.5V 10A 15W 88% S7AH-10J150
V7AH-10J150
1.2V 2.5V
10A
12W 83%
S7AH-10J120
V7AH-10J120
1.0V 2.5V
10A
10W 80%
S7AH-10J100
V7AH-10J100
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
Min
Typ
Max
Notes
Input Voltage (continuous)
-0.3V
-
6V
Output Enable Terminal Voltage
-0.3V
-
7V
Ambient Temperature
-40
C
-
85
C
Storage Temperature
-40
C
-
105
C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
2.25V 2.5V 2.75V
Input Current (no load)
-
75mA
-
Input Current (full load)
Vo=1.5V
Vo=1.2V
Vo=1.0V
-
-
-
6.8A
5.6A
4.9A
-
-
-
Remote Off Input Current
-
4mA
8mA
Input Reflected Ripple Current (pk-pk)
-
80mA
150mA
Input Reflected Ripple Current (RMS)
-
25mA
50mA
Tested with simulated source
impedance of 500nH, 5Hz to
20MHz; with a 270uF/16V with
ESR=0.018 ohm max, at
100KHz
at 25
C
I
2
t Inrush Current Transient
-
0.04A
2
s 0.10A
2
s
Turn on Voltage Threshold
2V
2.1V
2.15V
Turn off Voltage Threshold
1.8V
2V
2.15V
x7AH-10J 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
2.5V Input
0.9V-1.65V/10A Output
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
Vo=1.5V
Vo=1.2V
Vo=1.0V
1.470V
1.176V
0.980V
1.5V
1.2V
1.0V
1.530V
1.224V
1.020V
Test conditions:
Vin=2.5V, Io=full load
Line Regulation
Vo=1.5V
Vo=1.2V
Vo=1.0V
-
-
-
2mV
2mV
2mV
5mV
5mV
5mV
Load Regulation
Vo=1.5V
Vo=1.2V
Vo=1.0V
-
-
-
5mV
5mV
5mV
10mV
10mV
10mV
Regulation Over Temperature
(-40
C to +85C)
Vo=1.5V
Vo=1.2V
Vo=1.0V
-
-
-
13mV
10mV
9mV
25mV
20mV
20mV
Output Current
0A - 10A
Current Limit Threshold
13A - 25A
Short Circuit Surge Transient
Vo=1.5V
Vo=1.2V
Vo=1.0V
-
-
-
0.5A
2
s
0.5A
2
s
0.5A
2
s
1.5A
2
s
1.5A
2
s
1.5A
2
s
Ripple and Noise (RMS)
-
15mV
25mV
Ripple and Noise (pk-pk)
-
50mV
100mV
Test conditions:
0-20MHz BW, with a 1uF
ceramic capacitor at the
output.
Turn on Time
-
1mS
2mS
Overshoot at Turn on
-
0%
3%
Output Capacitance
220uF
-
4000uF
Transient Response
Overshoot -
90mV
125mV
50% ~ 100%
Max Load
Settling Time
-
30uS
60uS
Overshoot -
90mV
125mV
100% ~ 50%
Max Load
Settling Time
V
O
=1.5V
- 30uS 60uS
Overshoot -
80mV
120mV
50% ~ 100%
Max Load
Settling Time
-
30uS
60uS
Overshoot -
80mV
120mV
100% ~ 50%
Max Load
Settling Time
V
O
=1.2V
- 30uS 60uS
Overshoot -
80mV
120mV
50% ~ 100%
Max Load
Settling Time
-
30uS
60uS
Overshoot -
80mV
120mV
100% ~ 50%
Max Load
Settling Time
V
O
=1.0V
- 30uS 60uS
Test conditions:
di/dt = 0.5A/uS; Vin =
2.5V; with a 220uF
tantalum capacitor 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
2.5V Input
0.9V-1.65V/10A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
85%
83%
79%
88%
86%
82%
-
-
-
Measured at Vin=2.5V, full load and
Ta=25
C.
Switching Frequency
250KHz
300KHz
350KHz
Output Trim Range
90%Vo
-
110%Vo
MTBF
4,447,157 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 0.70 x 0.32
19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L W H)
Millimeters (L W H)
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
Weight -
4.7g
-
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit Off)
0V
-
0.5V
Signal High (Unit On)
2V
-
5.5V
Remote on/off pin open, the module is 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.
B
V
V
A
R
adj
nom
TrimDown
-
-
=
D
V
V
C
R
nom
adj
TrimUp
-
-
=
Vnom
A B C D
1.5V 49.788 287.900 43.330 226.000
1.2V 31.241 223.900 43.330 162.000
1.0V 11.029 92.800 25.550 56.200
Module
Vout
Trim
GND
Rtrimdown
Module
Vout
Trim
GND
Rtrimup
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
2.5V Input
0.9V-1.65V/10A Output
Efficiency Data
70.0%
72.0%
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
94.0%
1 2 3 4 5 6 7 8 9 10
Output Current
Ef
f
i
c
i
e
n
c
y
Vin=2.25V
Vin=2.50V
Vin=2.75V
70.0%
72.0%
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
1 2 3 4 5 6 7 8 9 10
Output Current
Ef
f
i
c
i
e
n
c
y
Vin=2.25V
Vin=2.50V
Vin=2.75V
X7AH-10J150
X7AH-10J120
70.0%
72.0%
74.0%
76.0%
78.0%
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
1 2 3 4 5 6 7 8 9 10
Output Current
E
f
f
i
ci
en
c
y
Vin=2.25V
Vin=2.50V
Vin=2.75V
X7AH-10J100
Thermal Derating Curve
Note: Derating curve is for 1.2V output and tested at nominal input voltage.
2004 Bel Fuse Inc. Specifications subject to change without notice. 120204
CORPORATE FAR
EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
206 Van Vorst Street
8F/ 8 Luk Hop Street
Preston Technology Management Centre
Jersey City, NJ 07302
San Po Kong
Marsh Lane, Suite G7, Preston
Tel 201-432-0463
Kowloon, Hong Kong
Lancashire, PR1 8UD, U.K.
Fax 201-432-9542
Tel 852-2328-5515
Tel 44-1772-556601
www.belfuse.com
Fax 852-2352-3706
Fax 44-1772-888366
www.belfuse.com
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
2.5V Input
0.9V-1.65V/10A Output
Pin Connections
Pin
Function
1
Remote On/Off (option)
2 Vin
3 Ground
4 Vout
5 Trim
(option)
6 N/A
7 N/A
Pin Connections
Pin
Function
1
Remote On/Off (option)
2 Vin
3 Ground
4 Vout
5 Trim
(option)
b e l
b e l
b e l
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