OM9551SP, OM9552SP, OM9553SP, OM9554SP
5V Input,
3A Output Current
+3.3V, +2.5V +1.8V, +1.5V Output
Switching Regulator
Three Terminal Package
FEATURES
•
High Efficiency
•
Internal Short Circuit Protection
•
Small Footprint
•
High Power Density- 60W/in.
3
APPLICATIONS
•
High Power 5V to 3.3V Regulation
•
Low Voltage Battery regulation
•
Embedded Processor Power
•
General Purpose Low Voltage Logic
Supply
•
FPGA Power
DESCRIPTION
The OM955X series of Switching Regulators are designed for pin compatibility with standard 3-
Pin linear regulators. They are well suited for on-board, non- isolated power applications where
efficient point- of- load regulation is needed. The package is designed using Chip- on – Board
technology to reduce cost and maintain power density. These units will typically not require any
additional components in your application due to capacitance provided internal to the package.
MAXIMUM RATINGS @ Ta=25° C (unless otherwise specified)
Parameter
Input Voltage
Output Current
Power Dissipation
Output Power
Lead Temp.
Value
8V
4A
1.8W
10W
230°C
Conditions
Short Circuit
Short Circuit
Short Circuit
< 1 min.
CONFIGURATION CHART
MODEL
OM9551SP
OM9552SP
OM9553SP
OM9554SP
OUTPUT
VOLTAGE
3.3V
2.5V
1.8V
1.5V
TEMPERATURE RANGE
-25 to +85°C
°
°
-25 to +85°C
-25 to +85°C
°
-25 to +85°C
°
MAX. OUTPUT
CURRENT
3.0A
3.0A
3.0A
3.0A
Rev A
08/01/2000
1
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
OM9551SP, OM9552SP, OM9553SP, OM9554SP
PERFORMANCE CHARACTERISTICS (Ta= 25°C)
°
INPUT
Parameter
Line Regulation
Input Voltage
Range
Input Filtering
1
OUTPUT
Parameter
Power
Vout Accuracy
Vout Regulation
Output Ripple
Current Limiting
Efficiency
Efficiency
Efficiency
Efficiency
Min. Load Current
Output Filter
Capacitance
1
DYNAMIC
Parameter
Transient
Response
Frequency
Symbol
Rline
Vin
Test Conditions
4.5V≤ Vin
≤
5.5V
≤
MIN
-0.5
4.5
MAX
+0.5
7.0
22
Units
%
V
uF
Symbol
Test Conditions
Po
Vo= 3.3V
Vo= 3.3V, +2.5V,
∆
Vo
+1.5V+1.8V
Vreg
Vη
η
Ilim
η
η
η
η
Il(min)
Co
Vin= 5V, 0.1≤ Iο≤3A
Vin= 5V, Io= 3.0A
Vin= 5V
Vin=5V,Io=3A,Vo=+3.3V
Vin=5V,Io=3A,Vo=+2.5V
Vin=5V,Io=3A,Vo=+1.8V
Vin=5V,Io=3A,Vo=+1.5V
MIN
TYP
0.8
0.3
80
4.0
88
87
86
85
MAX
10
1.0
0.1
100
Units
W
%
%
mV(p-p)
A
%
%
%
%
A
uF
0.1
All Models
330
Test Conditions
50% load step
∆
Vout
0 to 85°C
°
MIN
TYP
40
200
MAX
200
225
175
Units
µ
S
mV
KHz
ENVIRONMENTAL
Parameter
MODEL
Operating
OM9551SP,
Temperature
OM9552SP,
OM9553SP,
OM9554SP
Storage Temp.
Flammability
MIN
-25
MAX
85
Units
°
C
-40
125
UL94V0
°
C
1
Included in the package
2
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
Rev A
08/01/2000
OM9551SP, OM9552SP, OM9553SP, OM9554SP
Typical Performance Characteristics
(Ta= 25°C)
°
Vo= +3.3V
Efficiency vs Output Current
Vo= +3.3V
100.00
95.00
90.00
Efficiency (%)
85.00
80.00
75.00
70.00
65.00
60.00
0.00
0.50
1.00
1.50
Iout (A)
2.00
2.50
3.00
4.5V
5.0V
5.5V
2.00
1.80
1.60
1.40
1.20
PD (W)
1.00
0.80
0.60
0.40
0.20
0.00
0.00
Pow er Dissipation vs Output Current
4.5V
5.0V
5.5V
Ripple vs Output Curr e nt
200.00
180.00
160.00
140.00
120.00
100.00
80.00
60.00
40.00
20.00
0.00
0.00
4.5V
5.0V
5.5V
Ripple (mV)
0.50
1.00
1.50
Iout (A)
2.00
2.50
3.00
0.50 1.00 1.50 2.00
Iout (A)
2.50 3.00
Rev A
08/01/2000
3
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
OM9551SP, OM9552SP, OM9553SP, OM9554SP
MECHANICAL OUTLINE
Package Pinout
Vout
GND
Vin
Rev A
08/01/2000
4
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
OM9551SP, OM9552SP, OM9553SP, OM9554SP
APPLICATION CIRCUIT
Vin(+4.5- 5.5)
1
OM9551SP
3
Vout(+)
(3.3V)
0.1uF
COM
(optional)
2
0.1uF
(optional)
COM
Internal to the package is a 22uF input capacitor and a 330uF output capacitor.
The Omnirel process allows sufficient space allocation to include all components
necessary to complete the basic regulation design. The additional by-pass
capacitors are suggested if an improvement in switching noise becomes necessary.
Rev A
08/01/2000
5
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
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