PL
IA
NT
Features
CO
M
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*R
oH
S
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Industry standard SMT package
Output voltage programmable from
0.75 Vdc to 5.5 Vdc via external resistor
3 A output current
Up to 95 % efficiency
Small size, low profile
Cost-efficient
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Low output ripple and noise
High reliability
Remote on/off
Output overcurrent protection
(non-latching)
MX3A-12SA(-P) SMT Non-Isolated Power Module
Description
Bourns® MX3A-12SA(-P) is a non-isolated DC-DC converter offering designers a cost and space-efficient solution with standard
features such as remote on/off, precisely regulated programmable output voltage and overcurrent protection.
Specifications
Parameter
Min.
Nom.
Max.
Units
Notes
8.3
12
14
Vdc
Adc
18 V max. for -W version
INPUT
Voltage
Current
Remote ON/OFF:
Low or Open =
High =
2.0
Standard
On
Off
OUTPUT
Voltage Adjustment Range
Current
Voltage Setpoint Accuracy
Line Regulation
Load Regulation
Temperature Regulation
E
T
E
L
O
S
B
O
-P Option
Off
On
2.4
0.4
Vin
Vdc
Vdc
0.75
5.5
Vdc
0.0
3.0
-2.5
2.5
Adc
% Vo,set
0.3
% Vo,set
0.4
% Vo,set
0.4
10 µA max.
1 mA max.
Ripple (pk-pk) (20 MHz Bandwidth)
30
50
% Vo,set
mVpk-pk
1 µF ceramic//10 µF tantalum capacitors
Ripple (rms)
10
15
mVrms
1 µF ceramic//10 µF tantalum capacitors
1 µF ceramic//10 µF tantalum capacitors
Dynamic Load Response:
50 % to 100 % Load or 100 % to 50 % Load;
(∆i/∆t = 2.5 A/µs; 25 °C)
200
25
mV
µs
50 % to 100 % Load or 100 % to 50 % Load;
(∆i/∆t = 2.5 A/µs; 25 °C)
75
100
mV
µs
13,000
kHrs
0 to +85 °C
2 x 100 µF polymer capacitors
GENERAL
MTBF
Operating Temperature
-40
+85
°C
Storage Temperature
-55
+125
°C
Switching Frequency
300
kHz
Efficiency
86.0
%
Vo,set = 1.2 Vdc
88.0
%
90.0
%
Vo,set = 1.5 Vdc
Vo,set = 1.8 Vdc
91.0
%
Vo,set = 2.5 Vdc
93.0
%
Vo,set = 3.3 Vdc
95.0
%
Vo,set = 5.0 Vdc
(Vin = 12 Vdc, TA= 25 °C, Full Load)
Applications
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Intermediate Bus architecture
Distributed power applications
Workstations and servers
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Telecom equipment
Enterprise networks including LANs/WANs
Latest generation ICs (DSP, FPGA, ASIC) and microprocessor powered applications
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify device performance in their specific applications.
Output Voltage Programming
Via external trim resistor between Trim and GND:
Rtrim =
[
Via application of external voltage between Trim and GND:
]
10.5
- 1.0 kΩ
Vo - 0.7525
Vtrim = (0.7 - 0.0667 x {Vo - 0.7525})
MX3A-12SA(-P) SMT Non-Isolated Power Module
Product Dimensions
Recommended Pad Layout
BOTTOM VIEW
20.3
(0.80)
4.57
(0.180)
4.06
(0.160)
4.06
(0.160)
VOUT
4.57
(0.180)
4.83
(0.190)
GND
TRIM
VOUT
17.53
(0.690)
TRIM
4.06
(0.160)
8.64
(0.340)
8.89
(0.350)
ON/OFF
11.43
(0.450)
8.64
(0.340)
1.5
(0.06)
1.3
(0.05)
ON/OFF
VIN
1.5
(0.06)
2.29
(0.090)
4.83
(0.190)
GND
0.25
(0.010)
E
T
E
L
O
S
B
O
8.89
(0.350)
1.47
(0.058)
4.06
(0.160)
RECOMMENDED PAD SIZE:
VIN
3.05
2.41
X
MIN.
(0.120) (0.095)
3.43
2.79
X
MAX.
(0.135) (0.110)
Pick and Place Location
1.3
(0.05)
11.43
(0.450)
SIDE VIEW
1.47
(0.058)
DIMENSIONS:
MM
(INCHES)
6.18
(0.243)
4.32
(0.170)
9.63
(0.379)
TOLERANCES:
0.5
(0.02)
0.25
DECIMAL .XX ±
(0.010)
20.32
(0.800)
L1 REF.
DECIMAL .X ±
How to Order
6.80
(0.268)
M X 3A - 12 S A (-P)
Configuration
• M = Surface Mount Device
Internal Identifier
Derating Output Current vs. Local Ambient Temp & Airflow
Output Current (Amps)
Input Voltage (V)
(Vin = 12 Vdc, Vo = 3.3 Vdc)
Outputs
• S = Single
3.5
Output Voltage (V)
• A = Adjustable
Output Current (A)
3.0
Optional Positive On/Off Logic
2.5
Fixed output voltage parts and optional features available; contact factory.
NC (0 LFM)
2.0
1.5
1.0
0.5
0.0
25
30
35
40
45
50
55
60
65
70
Ambient Temperature (°C)
75
80
85
Asia-Pacific:
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe:
Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
REV. A 06/06
Specifications are subject to change without notice.
Customers should verify device performance in their specific applications.