MS5A

Features
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Surface mount
5 amp output current
90 % efficiency
Pin-out compatible with
Lucent’s Austin Lite™
Low profile
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Trim function
Overcurrent protection w/ auto-restart
Fast transient response
High-temperature operation
Non-isolated output
Enable/Disable
MS5A Series – Power Module
Electrical Specifications
General Information
The MS5A brings low profile and cost
effectiveness to a surface mount package.
Matching the footprint and pin-out of
Lucent’s Austin Lite™ series, the MS5A is
perfect for point-of-load applications that
demand a high performance power
source.
Designed for use with today’s latest
microprocessors, ASICs, and DSPs, the
MS5A provides superior transient
response using Bourns Switch Power’s
patented V2™ architecture. This high
efficiency converter includes a control pin
for output enable/disable, and can also
accept an external voltage across its
output; an advantage when powering
multiple input processors.
Input Specifications
Output
Voltage
(V)
Output
Current
(A)
OCP
Limit
(A)
Ripple
Max
(mV pp)
Efficiency
Typ.
(%)
3.3
MS5A-5S3.3
90
2.5
MS5A-5S2.5
5
MS5A-5S2.0
87
2.0
5
7
100
85
MS5A-5S1.8
1.8
82
MS5A-5S1.5
1.5
80
MS5A-3S2.5
2.5
91
MS5A-3S2.0
2.0
88
E
T
E
L
O
S
B
O
Voltage .....................................3.0 VDC Min.
3.3 VDC Nom.
3.6 VDC Max.
or .........................................4.5 VDC Min.
5 VDC Nom.
5.5 VDC Max.
Current ..................................5 A (5 V input)
5.5 A (3.3 V input)
Remote Enable
Open = On
Low = Off.....................................0.4 VDC
(Use open collector to pull down)
Output Specifications
Nominal
Input
(V)
3.3
MS5A-3S1.8
1.8
MS5A-3S1.5
1.5
MS5A-3S1.2
1.2
5
7
80
82
Product Dimensions
Current......................................................5 A
Voltage Setpoint Accuracy........±2 %Vnom
Voltage Trim Range...........-5 to +5 %Vnom
Line Regulation ......................±0.1 %Vnom
Load Regulation ....................±0.3 % Vnom
(±0.2 % without remote sense)
Dynamic Response
0 to 6 A load
...................200 mV nom. (∆i/∆t = 3 A/µs)
19 µs nom.
6 to 0 A load
...................200 mV nom. (∆i/∆t = 3 A/µs)
19 µs nom.
Temperature Regulation
...............................±0.02 %Vout/°C max.
General Specifications
MBTF ..................................1,000 kHrs nom.
Bellcore TR332, 25 °C
Operating Temperature..........-25 to +85 °C
(-40 to +85 °C optional)
Storage Temperature...........-40 to +125 °C
Switching Frequency ............800 kHz nom.
(500 kHz nom. MS5A-3S2.5 only)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
4.8
(0.19)
18.4
(0.725)
13.5
(0.53)
1.3
(0.05)
BOTTOM VIEW
1.9
(0.075)
1.2
(0.048)
33.0
(1.30)
1.3
(0.05)
1.8 x 3.0
4 PLCS.
(0.07 x 0.12)
1.9
(0.075)
HEIGHT = 7.0 (0.275)
4.8
(0.19)
7.9
(0.31)
10.9
(0.43)
0.6
(0.025)
29.9
(1.178)
DIMENSIONS = MILLIMETERS
(INCHES)
85
MS5A Series – Power Module
Product Schematic
Temperature Derating
MS5A-3S2.5
Vin
6
200 lfm
Rup
5
CNT
100 lfm
0 lfm
4
Gnd
3
(
1 – (V
2
)
– 1.5)
499 X Vin – (1 + Trim %) X 1.5 Vin – 1.5
Rup =
in
– (1 + Trim %) X 1.5 Vin
“-Z”
LOW TEMP
OPTION
1
E
T
E
L
O
S
B
O
Trim % = desired percentage trim up or down
0
-40
-30
-20
20
30
40
50
60
70
80
90
AMBIENT TEMPERATURE (°C)
MS5A-3S3.3
Vin
6
5
CNT
Rdown
Gnd
3
Rdown = 499 X
%
( 1 –1(1– Trim
– Trim %) )
400 lfm
200 lfm
100 lfm
4
“-Z”
LOW TEMP
OPTION
2
0 lfm
1
0
-40
-30
-20
20
30
40
50
60
70
80
90
AMBIENT TEMPERATURE (°C)
How to Order
M S 5A - 5 S 3.3 - Z
Configuration
Internal Identifier
Current/Power (Amps)
Input Voltage (Volts)
Outputs
S = Single
Output Voltage (Volts)
Options
Z = Industrial Temperature Range (-40 °C Operation)
Reliable Electronic Solutions
Asia-Pacific:
TEL +886- (0)2 25624117 • FAX +886- (0)2 25624116
Europe:
TEL +41-41 768 5555 • FAX +41-41 768 5510
The Americas: TEL +1-951 781-5500 • FAX +1-951 781-5700
COPYRIGHT© 2005, BOURNS, INC. LITHO IN U.S.A., REV. 1/05
www.bourns.com