Features
■
■
■
■
■
Surface mount
5 amp output current
90 % efficiency
Pin-out compatible with
Lucent’s Austin Lite™
Low profile
■
■
■
■
■
■
Trim function
Overcurrent protection w/ auto-restart
Fast transient response
High-temperature operation
Non-isolated output
Enable/Disable
MS5A Series – Power Module
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 V
2
™ 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.
Electrical Specifications
Nominal
Input
(V)
MS5A-5S3.3
MS5A-5S2.5
MS5A-5S2.0
MS5A-5S1.8
MS5A-5S1.5
MS5A-3S2.5
MS5A-3S2.0
MS5A-3S1.8
MS5A-3S1.5
MS5A-3S1.2
3.3
5
Output
Voltage
(V)
3.3
2.5
2.0
1.8
1.5
2.5
2.0
1.8
1.5
1.2
5
7
80
5
7
100
Output
Current
(A)
OCP
Limit
(A)
Ripple
Max
(mV pp)
Efficiency
Typ.
(%)
90
87
85
82
80
91
88
85
82
Input Specifications
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
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.
E
T
E
L
O
S
B
O
Product Dimensions
4.8
(0.19)
18.4
(0.725)
13.5
(0.53)
1.3
(0.05)
BOTTOM VIEW
1.3
(0.05)
1.8 x 3.0
4 PLCS.
(0.07 x 0.12)
1.9
(0.075)
1.2
(0.048)
33.0
(1.30)
1.9
(0.075)
HEIGHT = 7.0 (0.275)
4.8
(0.19)
7.9
(0.31)
0.6
(0.025)
10.9
(0.43)
29.9
(1.178)
DIMENSIONS =
MILLIMETERS
(INCHES)
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.
MS5A Series – Power Module
Product Schematic
V
in
R
up
CNT
5
4
3
2
1
0
100 lfm
0 lfm
Temperature Derating
MS5A-3S2.5
6
200 lfm
Gnd
499 X V
in
– (1 + Trim %) X 1.5 V
in
– 1.5
R
up
=
in
(
1 –
(
V
– (1 + Trim %) X 1.5 V
in
)
– 1.5
)
“-Z”
LOW TEMP
OPTION
Trim % = desired percentage trim up or down
V
in
CNT
R
down
Gnd
R
down
= 499 X
–
(
1 –1(1 Trim %%)
)
– Trim
E
T
E
L
O
S
B
O
-40
-30
-20
20
30
40
50
60
70
AMBIENT TEMPERATURE (°C)
80
90
MS5A-3S3.3
6
5
4
3
2
1
0
400 lfm
200 lfm
100 lfm
0 lfm
“-Z”
LOW TEMP
OPTION
-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