NON-ISOLATED DC/DC CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
xRAH-01H1A0
•
Non-Isolated
•
Trim Function
RoHS Compliant
•
•
•
OCP/SCP
Rev.A
Remote On/Off
Under-Voltage Lockout (UVLO)
•
Low Profile Package (7.82 mm)
•
UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-01H1A0 is part of the low cost non-isolated dc/dc converter series. The modules use a SMD or
vertical mount package for ease of layout and space savings. The output is widely trimmed from 1.2 Vdc to 3.3
Vdc. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit
protection.
Part Selection
Output
Voltage
1.2 V - 3.3 V
Input
Voltage
4.5 V - 32 V
Max. Output
Current
1A
Max. Output
Power
3.3 W
Typical
Efficiency
86%
Part Number
Surface Mount
SRAH-01H1A0
Part Number
Vertical Mount
VRAH-01H1A0
Notes:
1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
-40
°C
-40
°C
Typ
-
-
-
-
Max
34 V
12 V
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (no load)
Input Current (full load)
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Remote Off Input Current
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(RMS)
2
I t Inrush Current Transient
Turn on Voltage Threshold
Turn off Voltage Threshold
Min
4.5 V
-
-
-
-
-
-
-
-
-
-
-
-
Typ
20 V
5 mA
-
-
-
-
-
2 mA
300 mA
100 mA
0.02 A s
4.1 V
3.3 V
2
Max
32 V
8 mA
0.20 A
0.16 A
0.12 A
0.11 A
0.09 A
5 mA
420 mA
160 mA
0.1 A s
4.5 V
4.0 V
2
Notes
Tested with simulated source impedance of 500 nH,
5 Hz to 20 MHz and one 100 F/50 V electrolytic
capacitor and a 3.3 uF/50 V ceramic capacitor at the
input
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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
Output Specifications
Parameter
Output Voltage Set Point
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Line Regulation
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Load Regulation
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Regulation Over Temperature
(-40
°C
to +85
°C)
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
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
-
-
-
-
-
-
0A
2A
-
-
-
-
-
0 uF
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Min
3.234 V
2.450 V
1.764 V
1.470 V
1.176 V
Typ
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
±3
mV
±2
mV
±2
mV
±1
mV
±1
mV
±3
mV
±2
mV
±2
mV
±1
mV
±1
mV
±10
mV
-
-
0.02 A s
6 mV
60 mV
6 mS
2%
-
80 mV
150 uS
80 mV
150 uS
70 mV
120 uS
70 mV
120 uS
60 mV
100 uS
60 mV
100 uS
60 mV
100 uS
60 mV
100 uS
60 mV
100 uS
60 mV
100 uS
2
Max
3.366 V
2.550 V
1.836 V
1.530 V
1.224 V
±6
mV
±5
mV
±4
mV
±3
mV
±2
mV
±6
mV
±5
mV
±4
mV
±3
mV
±2
mV
±20
mV
1A
3A
0.1 A s
10 mV
100 mV
30 mS
5%
400uF
120 mV
200 uS
120 mV
200 uS
110 mV
160 uS
110 mV
160 uS
100 mV
130 uS
100 mV
130 uS
100 mV
130 uS
100 mV
130 uS
100 mV
130 uS
100 mV
130 uS
2
Notes
Test conditions:
Vin=20 V, Io=50% full
load
Test condition: 0-20 MHz
BW
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
Test conditions:
di/dt = 0.5 A/uS;
Vin = 20 V
V
O
=1.5 V
V
O
=1.2 V
Note:
All specifications are typical at 20 V 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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
General Specifications
Parameter
Efficiency
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Switching Frequency
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Output Trim Range
MTBF
Dimensions (surface mount)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions (vertical)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
270 kHz
190 kHz
150 kHz
130 kHz
100 kHz
1.2 V
290 kHz
220 kHz
170 kHz
150 kHz
120 kHz
-
8,040,762 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
5.1 g
310 kHz
250 kHz
190 kHz
170 kHz
140 kHz
3.3 V
Vo=1.2 V when trim pin open.
Calculated Per Bell Core SR-332 (I
O
=0.8 A, Vin=20 V; T
a
= 25
°C)
83%
80%
76%
73%
70%
86%
83%
79%
76%
73%
-
-
-
-
-
Measured at Vin=20 V, full load.
Min
Typ
Max
Notes
-
-
Note:
All specifications are typical at 20V input, full load at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Min
-0.3 V
2.8 V
Typ
-
-
Max
1V
12 V
Notes
Remote on/off pin open, unit on.
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 (Vo) 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
R
TrimDown
8.7
=
−
21.5
V
o
−
V
adj
17.2
V
adj
−
V
o
Rtrimdown
Module
Trim
GND
R
TrimUp
=
Vout
Module
Trim
Rtrimup
GND
Note:
Output voltage Vo=1.205 V
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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
Efficiency Data
Efficiency Curve
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
Efficiency Curve
Efficiency
4.5 V
20 V
32 V
Efficiency
4.5 V
20 V
32 V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
Vo = 3.3 V
Vo = 2.5 V
Efficiency Curve
Efficiency Curve
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
95.0%
90.0%
85.0%
Efficiency
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
4.5 V
20 V
32 V
Efficiency
4.5 V
20 V
32 V
Vo = 1.8 V
Efficiency Curve
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Current (A)
Vo = 1.5 V
Efficiency
4.5 V
20 V
32 V
Vo = 1.2 V
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 CONVERTER
4.5 Vdc - 32 Vdc Input
1.2 Vdc - 3.3 Vdc/1 A Output
Thermal Derating Curve
Test Condition:
Derating curve is tested at nominal input voltage.
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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