MX5A-12SA Bourns Inc., MX5A-12SA Datasheet - Page 10

• 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

Sufficient cooling must always be considered to ensure reliable operation, as these devices operate in a variety of thermal environments.
Factors such as ambient temperature, airflow, power dissipation and reliability must be taken into consideration.
The data presented in Figures 19 to 22 is based on physical test results taken in a wind tunnel test. The test set-up is shown in
Figure 27.
The thermal reference points are (1) T ref1 = temp at dual Mosfet, as shown in Figure 26, and (2) T ref2 = temp at controller IC. For reliable
operation, neither T ref1 or T ref2 should exceed 115 °C.
Voltage Margining
Output voltage margining can be implemented as follows:
Please consult your local Bourns Field Applications Engineer for more details and the calculation of the required resistor values.
10
Operating Information (Continued)
Thermal Considerations
1) Trim-up: Connect a resistor, Rm-up, from the Trim pin to the ground pin for adjusting the voltage upwards, and
2) Trim-down: Connect a resistor, Rm-down, from the Trim pin to the output pin for adjusting the voltage downwards.
MX5A-12SA SMT Non-Isolated Power Module
Fig. 26 T ref1 Temperature Measurement Location
C2
Air Flow
C3
L1
Fig. 25 Circuit Configuration for Margining Output Voltage
Vin
On/Off
Q1
C1
T
ref1
Vo
Trim
COM
R
n
trim
Customers should verify device performance in their specific applications.
Vo
R
Q2
R
Q1
margin-down
margin-up
25.4 (1.0)
Flow
Air
8.1 (0.32)
Specifications are subject to change without notice.
Fig. 27
Thermal Test Set-up
PCB
UNIT UNDER TEST
76.2 (3.0)
WIND TUNNEL
Airflow and ambient
temp sensor probes
location