MX5A-12SA Bourns Inc., MX5A-12SA Datasheet - Page 9

• Manufacturer Part Number: MX5A-12SA
• Description: CONV DC/DC 12V 5A ADJ OUT SMD
• Manufacturer: Bourns Inc.
• Series: MX(T)r
• Type: Point of Load (POL) Non-Isolated with Remote On/Offr

Specifications of MX5A-12SA

• Output: 0.75 ~ 5.5V
• Number Of Outputs: 1
• Power (watts): 27W
• Mounting Type: Surface Mount
• Voltage - Input: 10 ~ 14V
• Package / Case: 5-DIP SMD Module
• 1st Output: 0.75 ~ 5.5 VDC @ 5A
• Size / Dimension: 0.80" L x 0.45" W x 0.23" H (20.3mm x 11.4mm x 5.8mm)
• Power (watts) - Rated: 27.5W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 92%
• Output Power: 28 W
• Input Voltage Range: 10 V to 14 V
• Input Voltage (nominal): 12 V
• Output Voltage (channel 1): 0.75 V to 5.5 V
• Output Current (channel 1): 5 A
• Output Type: Adjustable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Lead Free Status / Rohs Status: Details
• Other names: MX5A-12SA-TR; MX5A-12SA-TR; MX5A-12SATR

The output voltage of the device can also be set by applying a voltage between the TRIM and GND pins. The Vtrim equation can be
written as follows:
Vtrim = (0.7 – 0.0667 x{Vo – 0.7225))
To set Vo = 3.3 V, the Vtrim required would therefore be 0.530 V.
Table 2 below provides the Vtrim values required for some common output voltage set points.
Output Voltage Setting
The output voltage can be programmed to any voltage between 0.75 Vdc and 5.5 Vdc by connecting a single resistor between the trim
pin and the GND pin of the module, as shown in Fig. 24 below.
If left open circuit the output voltage will default to 0.75 Vdc. The correct Rtrim value for a specific voltage can be calculated using the
following equation:
Rtrim = [10.5/(Vo-0.7525)-1] KΩ
For example, to set the MX5A-12SA to 3.3 V the following
Rtrim resistor must be used:
Rtrim = [10.5/(3.3-0.7525)-1] KΩ
Rtrim = 3.122 kΩ,
The closest standard 1 % E96 value is 3.09 kΩ.
Table 1 provides the Rtrim values required for some common output
voltage set points.
Specifications are subject to change without notice.
Customers should verify device performance in their specific applications.
Operating Information (Continued)
MX5A-12SA SMT Non-Isolated Power Module
Vo (V)
0.75
1.2
1.5
1.8
2.0
2.5
3.3
5.0
Vo (V)
0.75
1.2
1.5
1.8
2.5
3.3
5.0
MX5A-12SA Rtrim Values
MX5A-12SA Vtrim Values
Rtrim (kΩ)
Table 1
Table 2
22.46
13.05
9.024
11.78
5.009
3.122
1.472
Open
Vtrim (V)
0.4166
0.670
0.650
0.630
0.583
0.530
Open
Fig. 24 Circuit Configuration to Program Output
Voltage using an External Resistor
1 % Value
Open
22.6
13.0
9.09
11.8
4.99
3.09
1.47
V
ON/OFF
IN
(+)
GND
V
TRIM
O
(+)
Rtrim
LOAD
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