NON-ISOLATED DC/DC CONVERTERS
3.0V-5.5V Input
1.0V-3.3V/12A Output
x7AH-12Fxx0 Series
•
•
•
•
Non-Isolated
Fixed frequency (300kHz)
Low profile package (7.82mm)
Under-voltage lockout (UVLO)
•
•
•
•
OCP/SCP
Trim function (Option)
Remote On/Off
Remote Sense (SMD module)
Description
The Bel x7AH-12Fxx0 series are part of the low cost non-isolated DC/DC converter series. These converters are
available in a range of output voltages from 1.0V to 3.3V. It is packaged in a compact, overmolded package
rated at 12A. The output is closely regulated and the efficiency of 3.3V output module is typically 93% at full load.
Typical features include remote on/off, input under voltage lockout, over current protection and short circuit
protection.
Part Selection
Output
Voltage
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
Input
Voltage
4.5V – 5.5V
3.6V – 5.5V
3.0V – 5.5V
3.0V – 5.5V
3.0V – 5.5V
3.0V – 5.5V
Max. Output
Current
12A
12A
12A
12A
12A
12A
Max. Output
Power
39.6W
30.0W
21.6W
18.0W
14.4W
12.0W
Typical
Efficiency
93%
89%
87%
84%
82%
80%
Part Number
Surface Mount
S7AH-12F330
S7AH-12F250
S7AH-12F180
S7AH-12F150
S7AH-12F120
S7AH-12F100
Part Number
Vertical Mount
V7AH-12F330
V7AH-12F250
V7AH-12F180
V7AH-12F150
V7AH-12F120
V7AH-12F100
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
-40°C
-55°C
Typ
-
-
-
-
Max
6V
7V
85°C
125°C
Notes
Input Specifications
Parameter
Input Voltage
V
O
=3.3V
V
O
=2.5V
V
O
=1.8-1.0V
Input Current (no load)
Input Current (full load)
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
Remote Off Input Current
4.5V
3.6V
3.0V
-
-
-
-
-
-
-
-
-
-
-
120mA
-
-
-
-
-
-
2mA
5.5V
5.5V
5.5V
200mA
11A
10.5A
9.0A
8.1A
6.5A
5.2A
5mA
Min
Typ
Max
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
3.0V-5.5V Input
Parameter
Input Reflected Ripple Current (pk-pk)
Input Reflected Ripple Current (RMS)
I t Inrush Current Transient
Turn on Voltage Threshold
Turn off Voltage Threshold
2
1.0V-3.3V/12A Output
Min
-
-
-
-
Typ
260mA
75mA
0.09A s
2.1V
2V
2
Input Specifications (continued)
Max
320mA
120mA
0.2A s
-
2.4V
2
Notes
With simulated source impedance of
500nH, 5Hz to 20MHz; use a
270uF/6.3V cap with ESR=0.03 ohm
max at 100KHz
Note: All specifications are typical at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
Line Regulation
Load Regulation
Regulation Over Temperature (-40°C to +85°C)
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Ripple and Noise (RMS)
Ripple and Noise (pk-pk)
Turn on Time
Overshoot at Turn on
Output Capacitance
Transient Response
Overshoot
50% ~ 100%
Max Load
Settling Time
Overshoot
100% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 100%
Max Load
Settling Time
Overshoot
100% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 100%
Max Load
Settling Time
Overshoot
100% ~ 50%
Max Load
Settling Time
Min
3.234V
2.450V
1.764V
1.470V
1.176V
0.980V
-
-
-
-
-
-
-
-
0A
20A
-
-
-
-
-
330uF
-
-
-
-
-
-
-
-
-
-
-
-
Typ
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
±1mV
±2mV
±10mV
±9mV
±7mV
±6mV
±5mV
±4mV
-
-
2
0.3A s
12mV
50mV
5mS
0%
-
110mV
40uS
110mV
40uS
100mV
30uS
100mV
30uS
90mV
20uS
90mV
20uS
Max
3.366V
2.550V
1.836V
1.530V
1.224V
1.020V
±4mV
±5mV
±15mV
±13mV
±12mV
±11mV
±10mV
±9mV
12A
30A
2
0.6A s
21mV
90mV
10mS
3%
4800uF
150mV
80uS
150mV
80uS
150mV
60uS
150mV
60uS
130mV
40uS
130mV
40uS
Test conditions:
0-20MHz BW; 1uF ceramic
capacitor and 330uF external
capacitor at the output.
Notes
Test conditions:
Vin=5V, Io= 50% load
V
O
=3.3V
V
O
=2.5V
Test conditions:
di/dt=0.5A/us, Vin=5V, with
330uF external load
capacitance.
V
O
=1.0V -
1.8V
Note:
1. All specifications are typical at 5V 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
3.0V-5.5V Input
1.0V-3.3V/12A Output
General Specifications
Parameter
Efficiency
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
Efficiency
V
O
=1.8V
V
O
=1.5V
V
O
=1.2V
V
O
=1.0V
Switching Frequency
Output Trim Range
Remote Sense Compensation
MTBF
Dimensions (surface mount)
Inches (L
×
W
Millimeters (L
×
W
Dimensions (vertical)
Inches (L
×
W
Millimeters (L
×
W
Weight
×
H)
×
H)
×
H)
×
H)
-
85%
81%
79%
76%
250KHz
90%V
O
-
88%
84%
82%
79%
300KHz
-
-
4,038,174 hours
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.128
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
5.1g
-
-
-
-
-
350KHz
110%V
O
10%
SMD module
Calculated Per Bell Core TR-332 (I
O
= 9.6A, Vin=5V; T
a
= 25°C)
Vin=3.3V, full load
90%
86%
84%
81%
79%
77%
93%
89%
87%
84%
82%
80%
-
-
-
-
-
-
Vin=5V, full load
Min
Typ
Max
Notes
Control Specifications
Parameter
Remote On/Off
Min
-
Signal Low (Unit Off)
-
-
2.1V (Vin=3.0V)
Signal High (Unit On)
3.15V (Vin=4.5V)
3.85V (Vin=5.5V)
Typ
-
-
-
-
-
-
Max
0.9V (Vin=3.0V)
1.35V (Vin=4.5V)
1.65V (Vin=5.5V)
-
-
-
Remote on/off pin open, unit on.
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
3.0V-5.5V Input
1.0V-3.3V/12A 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.
R
TrimDown
=
A
−
B
V
nom
−
V
adj
Vout
Rtrimdown
Module
Trim
GND
R
TrimUp
=
V
adj
C
−
D
−
V
nom
Vout
Module
Trim
Rtrimup
GND
Vnom
3.3
2.5
1.8
1.5
1.2
1.0
A
161.391
111.674
68.576
50.000
31.240
18.850
B
161.900
208.900
287.900
287.900
208.900
161.900
C
43.330
43.330
43.330
43.330
43.330
43.330
D
100.000
147.000
226.000
226.000
147.000
100.000
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
3.0V-5.5V Input
1.0V-3.3V/12A Output
Efficiency Data
100.00%
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
1
2
3
4
5
6
7
8
9
10
11
12
75.00%
95.00%
90.00%
4.5V
5.0V
5.5V
85.00%
80.00%
3.6V
4.5V
5.5V
70.00%
1
2
3
4
5
6
7
8
9
10
11
12
x7AH-12F330
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
1
2
3
4
5
6
7
8
9
10
11
12
3V
3.3V
5V
5.5V
80.00%
75.00%
70.00%
65.00%
60.00%
1
2
3
95.00%
90.00%
85.00%
x7AH-12F250
3V
3.3V
5V
5.5V
4
5
6
7
8
9
10
11
12
x7AH-12F180
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
65.00%
60.00%
1
2
3
4
5
6
7
8
9
10
11
12
3V
3.3V
5V
5.5V
70.00%
65.00%
60.00%
1
2
3
95.00%
90.00%
85.00%
80.00%
75.00%
x7AH-12F150
3V
3.3V
5V
5.5V
4
5
6
7
8
9
10
11
12
x7AH-12F120
x7AH-12F100
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
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