Model # AP9151A
Rad-Hard Single 2 Amp Point-of-Load Regulator
POL Switching Regulators Manufactured in a Certified Class-K Facility
Features
•
Smallest Footprint in the Space Industry at this
Efficiency Level
(Note 1)
•
Single 2 Amp product
•
Efficiencies to 93%
(See Table 5)
•
Rad-Hard to 100 krad TID
•
SE Results Show no Significant Output Transients
through an LET of 90 MeV/(mg/cm
2
)
•
Optimized for 5 V Input
•
Operates Down to 4.6 V Input, and as High as 6 V.
•
Current Mode Control
•
Available in Output Voltages
between 1.0 V and 3.6 V
•
Parallelable Models Available
(Described in Other Data Sheets)
•
Synchronizable Models Available
•
Enable Function Included
•
Operates at a Nominal Frequency of 1 MHz
Description
The AP9151A by API Technologies is a non-isolated Point of Load switching regulator for high reliability military and space
distributed power applications. Fully integrated, these include a buck controller, inductor, and input/output capacitors
combined in a single package. They operate from an input voltage of 4.6 to 6.0 V, providing step down power conversion
to output voltages as low as 1.0 V (or lower). Operating features include output voltage adjust, output current limit, and
enable; Some models have external synchronization and soft start functionality.
Additionally, some models can also be setup in a parallel configuration to increase output current capability and reduce
ripple on the input and output supplies. Careful design and layout ensure excellent stability, transient response, and low
noise operation. Packaged in a compact metal case, they operate over the full -55
o
C to 125
o
C temperature range. The
API9151A Point of Load (POL) switching regulators are more efficient than competitive POLs. (See Table 5.)
Table 1 – Absolute Maximum Ratings
(Tc = +25
o
C Unless Otherwise Noted)
(Exceeding maximum ratings may damage the device.)
Symbol
V
IN
I
MAX
I
MAX
MO-078
T
j
T
C
T
STG
R
ØJC
Parameters / Test Conditions
Input Voltage
Enable Input
Sync Input Current
Approximate Weight
Operating Temperature Range, Junction
Operating Temperature Range, Base of Package
Storage Temperature Range
Internal Switches
Thermal Resistance, Junction-to-Case, MO-78 Package
Value
Unit
VDC
mA
mA
Grams
o
C
o
C
o
C
o
C/W
6.5
± 10
± 10
10
-65 to +145
-55 to +125
-65 to +150
3
Note: For Mechanical and Packaging Information, see Figures 3 through 5 and Table 6.
(4)
Rev Date: 5/14/2014
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Model # AP9151A
Table 2 – Electrical Characteristics
(3)
(Ta= -55
o
C to +125
o
C Unless Otherwise Specified)
Symbol
Parameters / Test Conditions
Minimum Input Voltage
Output Voltage Accuracy Vo = 1.00 V
Post 100K Irradiation, 25
o
C
Line Regulation
4.6 < V
IN
< 6 V, 1 MHz
Load Regulation
0.5 <
I
OUT
< 1A, 1 MHz
Oscillator Frequency
Current Limit Vo = 2.5 V
Input Voltage on Enable Pin to Guarantee Shutdown to Io = 0A
(2)
Min.
4.6
- 1.0
- 1.5
- 0.2
- 0.25
710
2.0
2.0
Value
Nom.
--
--
--
--
--
--
3.0
--
Max.
--
+ 1.0
+ 1.5
+ 0.2
+ 0.25
1420
4.0
--
Unit
V
%
%
%
%
KHz
A
V
V
IN (Min)
V
OUT
V
OUT
Kvi
Kvo
F
SYNC
I
CL
V
shdn
Notes
:
1. At the time of publication of this datasheet, API Technologies/Marlborough did not have a MIL-PRF-38534 qualified radiation
hardness assurance program.
2. If not used, or when on, Enable pin should be pulled up to a logic one (2.0 V min, 6 V max) through a resistor of no more than 5 K
Ohms. Voltage on this pin to disable operation needs to be less than 1.45 V.
3. Testing is accomplished at an output load of 1 A, and an output Voltage of 2.5 V and an input of 5 V unless otherwise specified.
Only the specification with post irradiation limits are tested after radiation exposure.
4. All package outline dimensions are in inches.
5. Performed at a DLA approved facility.
6. Tested per MIL-PRF-38534
Table 3 - Screening Options
Screening Levels
Tests
100 % Non-Destruct Wire-Pull
Pre-Cap Visual
Temperature Cycle
Constant Acceleration
PIND
Pre-Burn-In Electrical (Ta= 25 C)
Burn-In
Final Electrical
Hermeticity (Fine & Gross Leak)
X-Ray
(5)
External Visual
Rev Date: 5/14/2014
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C
Commercial
N/A
N/A
N/A
N/A
N/A
100%
100% (48 hours)
100% (25C)
100%
N/A
Sample
H
Sample
N/A
100%
100%
N/A
100%
100% (240 Hours)
100%
100%
N/A
100%
K
Compliant- MIL-PRF-38534
100%
100%
100%
100%
100%
100%
100% (320 Hours)
100%
100%
100%
100%
Mil-Std-883-
Method
2023
2017
1010
2001
2020
1015
(6)
1014
2012
2009
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Model # AP9151A
Table 4 - Product Functionality
AP915
Series
Model
Options
1A
1B
1F
3A
3B
3F
5A
5F
Output
Current
Feature
Set
Package
Key
Vout
Fixed/Variable
Output
Operating
Input
Voltage
4.6-6.0
4.6-6.0
4.6-6.0
4.6-6.0
4.6-6.0
4.6-6.0
4.6-6.0
4.6-6.0
2A
2A
2A
6A
6A
6A
10 A
10 A
Minimal
Enhanced
Full
Minimal
Enhanced
Thermal
Full
Minimal
Full
M
M
EM
Y
Y
EY
Z
EZ
<1-3.6
<1-3.6
<1-3.6
<1-3.6
<1-3.6
<1-3.6
<1-3.6
<1-3.6
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Ordering Information
AP915
1A
-M
Package Type
M = MO-078
EM=Full Featured MO-078
Y=6 Amp Package
EY=Full Featured Y Package
Z=10 A Package
EZ=Full Featured Z Package
-K
Screening Level
K = Class-K Compliant
H = Class-H Compliant
E = Engineering Model
C = Commercial
-1
Lead Bend Options
1 = Straight Leads (Fig 3)
2 = SMT Lead Bend (Fig 4)
3 = Right Angle Bend Down (Fig 5)
Model Options
See Table 4
Example: 2 Amp minimal feature set, MO-078 package, Class K, straight leads is….
Model # AP9151A-M-K-1
Rev Date: 5/14/2014
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Application Circuits, 2 AMP Product
Figure 1 – 2A Configuration
Model # AP9151A
Figure 2 – Output Voltage Selection
Vo=1+Rset/10 (Resistance in k-Ohms)
Example: If Rset=15 k-Ohms, Vo=1+15/10=2.5 V
Table 5 - Predicted Efficiency Chart
Rev Date: 5/14/2014
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Model # AP9151A
Figure 3 – Straight Lead Package
Figure 4 – Surface Mount Package with Lead-Bend
Rev Date: 5/14/2014
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