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Model # AP9151ALM
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 (derated value)
• For 6A or 10A product, see datasheets as shown in
figure 4
• 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/cm2)
• Optimized for 5 V Input
• Operates Down to 4.6 V Input, and as High as 6 V.
• Current Mode Control
• Output adjustable between
<1 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
• For enhanced features, please see AP9151F Series
data sheets.
Description
The AP9151AM 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 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 -55oC to 125oC temperature range. The
AP9151AM Point of Load (POL) switching regulators are more efficient than competitive POLs. (See Table 5.)
Table 1 – Absolute Maximum Ratings (Tc = +25oC Unless Otherwise Noted)
(Exceeding maximum ratings may damage the device.)
Symbol
Parameters / Test Conditions
Value
Unit
VIN
Input Voltage
6.5
VDC
IMAX
Enable Input
± 10
mA
IMAX
Sync Input Current
± 10
mA
10
Grams
MO-078
Approximate Weight
Tj
Operating Temperature Range, Junction
-65 to +145
oC
TC
Operating Temperature Range, Base of Package
-55 to +125
oC
TSTG
Storage Temperature Range
-65 to +150
oC
RØJC
Internal Switches
Thermal Resistance, Junction-to-Case, MO-078 Package
3
oC/W
Note: For Mechanical and Packaging Information, see Figures 3 through 5 and Table 6. (4)
Rev Date: 6/12/2015
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Model # AP9151ALM
Table 2 – Electrical Characteristics (3)
(Ta= -55oC to +125oC Unless Otherwise Specified)
Min.
Value
Nom.
Max.
Minimum Input Voltage
4.6
--
--
V
VOUT
Output Voltage Accuracy Vo = 1.00 V
- 1.0
--
+ 1.0
%
VOUT
Post 100K Irradiation, 25oC
- 1.5
--
+ 1.5
%
Kvi
Line Regulation
4.6 < VIN < 6 V, 1 MHz
- 0.2
--
+ 0.2
%
Kvo
Load Regulation
0.5 < IOUT < 1A, 1 MHz
- 0.25
--
+ 0.25
%
FSYNC
Oscillator Frequency
710
--
1420
KHz
Current Limit Vo = 2.5 V
2.0
3.0
4.0
A
Input Voltage on Enable Pin to Guarantee Shutdown to Io = 0A (2)
2.0
--
--
V
Symbol
Parameters / Test Conditions
VIN (Min)
ICL
Vshdn
Unit
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
H
Mil-Std-883Method
K
Compliant- MIL-PRF-38534
100 % Non-Destruct Wire-Pull
Sample
100%
2023
Pre-Cap Visual
N/A
100%
2017
Temperature Cycle
100%
100%
1010
Constant Acceleration
100%
100%
2001
PIND
N/A
100%
2020
Pre-Burn-In Electrical (Ta= 25 C)
100%
100%
Burn-In
100% (240 Hours)
100% (320 Hours)
1015
Final Electrical
100%
100%
(6)
Hermeticity (Fine & Gross Leak)
100%
100%
1014
N/A
100%
2012
100%
100%
2009
X-Ray
(5)
External Visual
Rev Date: 6/12/2015
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Model # AP9151ALM
Table 4 – Total Product Functionality (Highlighting the 2A POL Model # AP9151ALM)
AP915
Series
Model
Options
Output
Current
1ALM*
2A
1FLX
2A
3CLY*
6A
3FLX
6A
5CLZ
10 A
5FLX*
10 A
Feature
Set
Minimal plus
Low Voltage
Full plus
Low Voltage
Minimal Plus
Low Voltage
Full plus
Low Voltage
Minimal plus
Low Voltage
Full plus
Low Voltage
Package
Key
VoutVolts
Fixed or
Adjustable
Output
Operating
input
Voltage
M
<1-3.6
Adjustable
4.6-6.0
X
<1-3.6
Adjustable
4.6-6.0
Y
<1-3.6
Adjustable
4.6-6.0
X
<1-3.6
Adjustable
4.6-6.0
Z
<1-3.6
Adjustable
4.6-6.0
X
<1-3.6
Adjustable
4.6-6.0
*Models Currently Under Development
Ordering Information
AP9151
Model Options
A, B, etc.=Basic
F=Full Featured
--------------L=Low Voltage Option
K
M
AL
M
Y
Z
X
Package Type
= MO-078
= 6 Amp Package
= 10 A Package
= Full Featured Package
1
Screening Level
K = Class-K Compliant
H = Class-H Compliant
E = Engineering Model
Lead Bend Options
1 = Straight Leads (Fig 3)
2 = SMT Lead Bend (Fig 4)
3 = Right Angle Bend Down (Fig 5)
Example: 2 Amp minimal feature set, MO-078 package, Class K, straight leads is:
Model: AP9151ALMK1
Rev Date: 6/12/2015
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Model # AP9151ALM
Application Circuits, 2 AMP Product
Figure 1 – 2A Pin Functionality and Basic Connections
Figure 2 – Output Voltage Selection
Vo=0.5(1+Rset/10 ) (Resistance in k-Ohms)
Example: If Rset=15 k-Ohms, Vo=0.5(1+15/10)=1.25 V
Table 5 - Predicted Efficiency Chart, AP9151 series
Rev Date: 6/12/2015
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Model # AP9151ALM
Figure 3 – Straight Lead Package
Figure 4 – Surface Mount Package with Lead-Bend
Rev Date: 6/12/2015
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Model # AP9151ALM
Figure 5 –Package with Right Angle Lead-Bend
Table 6 – Pin Assignments and Quick Specs for 2A Basic Products
Pin No
Pin Name
Function
Comments
Input Voltage
4.6 to 6.0 Volts
1
VIN
2
GND
Ground
Input and Output Voltage Return
3
VOUT
Output Voltage
1 V to 3.6 V @ 2A (derated)
(<1 V to 3.6 V for “L” series)
4
Enable
Enable Input
> 2.0 V to enable , < 1.45 V to disable
5
Adjust
Output Voltage Adjust
Allows fine adjustment in output voltage
CASE
N/C
Isolated
Should be grounded
*Consult Factory for additional lead bend options.
Rev Date: 6/12/2015
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Model # AP9151ALM
Figure 6 – Recommended Application Circuit
Rev Date: 6/12/2015
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