MX5A-3-5SA Bourns Inc., MX5A-3-5SA Datasheet - Page 9

• Manufacturer Part Number: MX5A-3-5SA
• Description: CONV DC/DC 3-5V 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-3-5SA

• Output: 0.75 ~ 3.63V
• Number Of Outputs: 1
• Power (watts): 18W
• Mounting Type: Surface Mount
• Voltage - Input: 3 ~ 5.5V
• Package / Case: 5-DIP SMD Module
• 1st Output: 0.75 ~ 3.63 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: 18.2W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 94%
• Output Power: 18 W
• Input Voltage Range: 3 V to 5.5 V
• Input Voltage (nominal): 3.5 V
• Output Voltage (channel 1): 0.75 V to 3.63 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: Lead free / RoHS Compliant
• Other names: MX5A-3-5SATR

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 – 0.1698 x{Vo – 0.7225))
To set Vo = 3.3 V, the Vtrim required would therefore be 0.2670 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 3.3 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 = [21.07/(Vo-0.7525)-5.11] KΩ
For example, to set the MX5A-3-5SA to 3.3 V the following
Rtrim resistor must be used:
Rtrim = [21.07/(3.3-0.7525)-5.11] KΩ
Rtrim = 3.161 kΩ,
The closest standard 1 % E96 value is 3.16 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-3-5SA SMT Non-Isolated Power Module
Vo (V)
0.75
1.0
1.2
1.5
1.8
2.0
2.5
3.3
Vo (V)
0.75
1.0
1.2
1.5
1.8
2.0
2.5
3.3
MX5A-3-5SA Rtrim Values
MX5A-3-5SA Vtrim Values
Rtrim (kΩ)
Table 1
Table 2
80.02
41.97
23.08
15.00
11.78
6.947
3.161
Open
Vtrim (V)
0.6580
0.6240
0.5731
0.5221
0.4882
0.4033
0.2674
Open
Fig. 24 Circuit Configuration to Program Output
Voltage using an External Resistor
1 % Value
Open
80.6
42.2
23.2
15.0
11.8
6.98
3.16
V
ON/OFF
IN
(+)
GND
V
TRIM
O
(+)
Rtrim
LOAD
9