DCDC
QSB75/100
M
odels and Ratings
Notes
Notes
1
. Ripple & noise is measured with a 10 µF tantalum capacitor and 1.0 µF
ceramic capacitor across output.
2
. Logic compatibility: Ref to -ve input. Module On = open circuit.
Module Off = <0.8 VDC.
3
. Add suffix ‘N’ to the model number to receive the unit with negative logic
Remote On/Off.
4
. Input current specified at 24 V for 9-36 VDC and 48 V for 18-75 VDC models.
Mechanical Details
Input Voltage Output Voltage Output Current
I
nput Current
(4)
Efficiency Model Number
(
3)
N
o Load
F
ull Load
9
-36 VDC
(
24 V nominal)
3.3 V 12.00 A 50 mA 2.04 A 81.0% QSB7524S3V3
5
.0 V
1
2.00 A
5
0 mA
2
.98 A
8
4.0%
Q
SB7524S05
1
2.0 V
6
.25 A
5
0 mA
3
.64 A
8
6.0%
Q
SB7524S12
1
5.0 V
5
.00 A
5
0 mA
3
.64 A
8
6.0%
Q
SB7524S15
24.0 V 3.12 A 50 mA 3.63 A 86.0% QSB7524S24
18-75 VDC
(
48 V nominal)
3
.3 V
1
2.00 A
3
0 mA
1
.10 A
8
2.0%
Q
SB7548S3V3
5.0 V 12.00 A 30 mA 1.47 A 85.0% QSB7548S05
12.0 V 6.25 A 30 mA 1.82 A 86.0% QSB7548S12
1
5.0 V
5
.00 A
3
0 mA
1
.80 A
8
7.0%
Q
SB7548S15
2
4.0 V
3
.12 A
3
0 mA
1
.80 A
8
7.0%
Q
SB7548S24
9-36 VDC
(
24 V nominal)
3.3 V 30.00 A 120 mA 4.80 A 86.0% QSB10024S3V3
5
.0 V
2
0.00 A
1
20 mA
4
.82 A
8
6.5%
Q
SB10024S05
1
2.0 V
8
.30 A
8
0 mA
4
.80 A
8
6.5%
Q
SB10024S12
1
5.0 V
6
.70 A
8
0 mA
4
.84 A
8
6.5%
Q
SB10024S15
24.0 V 4.17 A 80 mA 4.79 A 87.0% QSB10024S24
1
8-75 VDC
(48 V nominal)
3
.3 V
3
0.00 A
6
0 mA
2
.37 A
8
8.0%
Q
SB10048S3V3
5
.0 V
2
0.00 A
6
0 mA
2
.37 A
8
8.0%
Q
SB10048S05
12.0 V 8.30 A 30 mA 2.36 A 88.0% QSB10048S12
15.0 V 6.70 A 30 mA 2.38 A 88.0% QSB10048S15
2
4.0 V
4
.17 A
3
0 mA
2
.37 A
8
8.0%
Q
SB10048S24
1.03
(26.2)
1.45
(36.8)
2.00 (50.80)
1
0.60
(15.24)
0.50
(12.70)
0.16
(4.1) min.
ø 0.040
(1.02)
Pins 1,2,3,5,6,7
ø 0.059
(1.50)
Pins 4,8
3
2
4
6
7
8
5
2.28 (57.90)
1.14 (28.96)
0.73
(18.42)
0.60
(15.24)
Mounting hole diameter:
0.126 (3.2) clearance hole
0.30
(7.62)
1.86 (47.20)
BOTTOM VIEW
PIN CONNECTIONS
Pin Function
1 +Vin
2 Remote On/Off
3 -Vin
4 -Vout
5 -Sense
6 Trim
7 +Sense
8 +Vout
1. Dimensions are in inches (mm)
2. Tolerances: X.XX = ±0.02 (X.X = ±0.5)
X.XXX = ±0.01 (X.XX = ±0.25)
3. Weight: 0.15 lbs (66 g) approx
Air Flow Rate
Typical R
ca
Natural Convection
20 ft. / min (0.1 ms)
10.1 °C/W
100 ft./min (0.5 ms) 8.0 °C/W
200 ft./min (1.0 ms) 5.4 °C/W
300 ft./min (1.5 ms) 4.4 °C/W
400 ft./min (2.0 ms) 3.4 °C/W
R
ca
= Thermal resistance case to ambient
Thermal Resistance Information
Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
0 10 20 30 40 50 60 70 80 90 100
Ambient Temperature ,Ta (ºC)
Power Dissipated ,Pd (W)
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. (1.5 m/s)
400 ft./min. (2.0 m/s)
Derating Curve
