ATO2800T Series
Hybrid - High Reliability
Triple Output DC/DC Conver ters
DESCRIPTION
The ATO2800T Series of DC/DC converters
feature high power density and an extended
temperature range for use in military and indus-
trial applications. Designed to the nominal input
requirements of MIL-STD-704D, these devices
have nominal 28VDC inputs with +5V and ± 12V
or +5V and ± 15V triple outputs to satisfy a wide
range of requirements. The circuit design incorpo-
rates a pulse width modulated push-pull topology
operating in the feed-forward mode at a nominal
switching frequency of 250kHz. Input to output
isolation is achieved through the use of transform-
ers in the forward and feedback circuits.
The advanced feedback design provides fast loop
response for superior line and load transient
characteristics and offers greater reliability and
radiation tolerance than devices incorporating
optical feedback circuits.
Three standard temperature grades are offered.
Refer to Part Number section. They are provided
in a standard plug-in package for PC mounting or
in a flanged package for more severe environ-
ments.
These converters are manufactured in a facility
fully qualified to Mil-Std-1772. All processes used
to manufacture these converters have been
qualified to enable Advanced Analog to deliver
compliant devices. Two screening grades are
available to satisfy a wide range of requirements.
The CH grade converters are fully compliant to
Mil-Std-1772 class H. The HB grade converters
are processed to full class H screening but do not
have class H element evaluation as required by
Mil-Std-1772. Both grades are fully tested and
operate over the full military temperature range
without derating of output power. Variations in
electrical, mechanical and screening can be
accommodated. Extensive computer simulation
using complex modeling enables rapid design
modification to be provided. Contact Advanced
Analog with specific requirements.
FEATURES
■16 to 40 VDC input range (28VDC nominal)
■5V, ±12V or 5V, ±15V outputs available
■Indefinite short circuit and overload protection
■15 watts output power
■Fast loop response for superior transient characteris-
tics
■Operating temperature range from -55°C to +125°C
available
■Popular industry standard pin-out
■Resistance seam welded case for superior long term
hermeticity
■Efficiencies up to 81%
■Shutdown from external signal
■200,000 hour MTBF at 85°C
Conditions ATO2812T ATO2815T
-55°C - Tc - +85°C, VIN = 28 VDC Limits Limits Units
Test Symbol ±5%, CL=0, unless otherwise specified Min Max Min Max
STATIC CHARACTERISTICS
OUTPUT
Voltage
1
V
OUT
I
OUT
= 0 (main) T
C
= 25°C 4.95 5.05 4.95 5.05 V
Over Temp 4.90 5.10 4.90 5.10 V
I
OUT
= 0 (dual)
1
T
C
= 25°C ±11.88 ±12.12 ±14.85 ±15.15 V
Over Temp ±11.76 ±12.24 ±14.70 ±15.30 V
Current
1,2,3
I
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 0.0 2000 0.0 2000 mA
V
IN
= 16, 28, and 40 V
DC
(dual)
1
0.0 ±208 0.0 ±167 mA
Ripple Voltage
1,4
V
RIP
V
IN
= 16, 28, and 40 V
DC
(dual) 80 80 mV p-p
BW =
DC
to 2 MHz (main)
V
IN
= 16, 28, and 40 V
DC
40 40 mV p-p
BW =
DC
to 2 MHz (dual)
Power
1,2,3
P
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 10 10 W
(+dual) 2.5 2.5 W
(-dual) 2.5 2.5 W
(total) 15 15 W
REGULATION
Line
1,3
VR
LINE
V
IN
= 16, 28, and 40 V
DC
25 25 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
(dual) T
C
= 25°C ±30 ±35 mV
I
OUT
= 0, ±84, ±167 mA (dual) Over Temp ±60 ±75 mV
Load
1,3
VR
LOAD
V
IN
= 16, 28, and 40 V
DC
50 50 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
±60 ±75 mV
I
OUT
= 0, ±84, ±167 mA (dual)
INPUT
Current I
IN
I
OUT
= 0, inhibit (pin 8) 15 15 mA
tied to input return (pin 10)
I
OUT
= 0, inhibit (pin 2) = open 40 40 mA
Ripple Current
4
I
RIP
I
OUT
= 2000 mA (main) 50 50 mA p-p
I
OUT
= ±167 mA (dual)
BW =
DC
to 2 MHz
EFFICIENCY E
FF
I
OUT
= 2000 mA (main) T
C
= +25°C 76 76 %
I
OUT
= ±167 mA (dual)
T
C
= ±25°C
ISOLATION ISO Input to output or any pin to case (except T
C
= +25°C 100 100 M Ω
pin 7) at 500 V
DC
, Tc = +25°C
LOAD FAULT POWER
DISSIPATION
3
P
D
Over Load, T
C
= +25°C
5
T
C
= +25°C 8 8 W
Short Circuit, T
C
= +25°C 6 6 W
SWITCHING FREQUENCY F
S
I
OUT
= 2000 mA (main) 225 275 225 275 kHz
I
OUT
= ±167 mA (dual)
INHIBIT OPEN CIRCUIT V
OI
913 913 V
VOLTAGE
Notes:
1. Tested at each output.
2. Parameter guaranteed by line and load regulation tests.
3. At least 20 percent of the total output power should be taken from the (+5 volt) main output.
4. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power
dissipation.
6. Above 85°C case temperature, derate output power linearly to 0 at 135°C case.
2
SPECIFICATIONS
TCASE = -55°C to +85°C, VIN = +28 V ±5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5 V to +50 V
Power Output Internally limited, 17.5W typical
Soldering 300°C for 10 seconds
Temperature Range6Operating -55°C to 115°C case
Storage -65°C to +135°C
Notes:
1. Tested at each output.
2. Parameter guaranteed by line and load regulation tests.
3. At least 20 percent of the total output power should be taken from the (+5 volt) main output.
4. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power
dissipation.
6. Above 105°C case temperature, derate output power linearly to 0 at 135°C case.
3
SPECIFICATIONS
TCASE = -55°C to +105°C, VIN = +28 V ±5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5 V to +50 V
Power Output Internally limited, 17.5W typical
Soldering 300°C for 10 seconds
Temperature Range6Operating -55°C to 125°C case
Storage -65°C to +135°C
Conditions ATO2812T/ES ATO2815T/ES
-55°C - Tc - +105°C, VIN = 28 VDC Limits Limits Units
Test Symbol ±5%, CL=0, unless otherwise specified Min Max Min Max
STATIC CHARACTERISTICS
OUTPUT
Voltage
1
V
OUT
I
OUT
= 0 (main) T
C
= 25°C 4.95 5.05 4.95 5.05 V
Over Temp 4.90 5.10 4.90 5.10 V
I
OUT
= 0 (dual)
1
T
C
= 25°C ±11.88 ±12.12 ±14.85 ±15.15 V
Over Temp ±11.76 ±12.24 ±14.70 ±15.30 V
Current
1,2,3
I
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 0.0 2000 0.0 2000 mA
V
IN
= 16, 28, and 40 V
DC
(dual)
1
0.0 ±208 0.0 ±167 mA
Ripple Voltage
1,4
V
RIP
V
IN
= 16, 28, and 40 V
DC
80 80 mV p-p
BW =
DC
to 2 MHz (main)
V
IN
= 16, 28, and 40 V
DC
40 40 mV p-p
BW =
DC
to 2 MHz (dual)
Power
1,2,3
P
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 1 0 10 W
(+dual) 2.5 2.5 W
(-dual) 2.5 2.5 W
(total) 15 15 W
REGULATION
Line
1,3
VR
LINE
V
IN
= 16, 28, and 40 V
DC
25 25 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
(dual) T
C
= 25°C ±30 ±35 mV
I
OUT
= 0, ±84, ±167 mA (dual) Over Temp ±60 ±7 5 mV
Load
1,3
VR
LOAD
V
IN
= 16, 28, and 40 V
DC
50 50 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
±60 ±75 mV
I
OUT
= 0, ±84, ±167 mA (dual)
INPUT
Current I
IN
I
OUT
= 0, inhibit (pin 8) 15 15 mA
tied to input return (pin 10)
I
OUT
= 0, inhibit (pin 2) = open 40 40 mA
Ripple Current
4
I
RIP
I
OUT
= 2000 mA (main) 50 50 mA p-p
I
OUT
= ±167 mA (dual)
BW =
DC
to 2 MHz
EFFICIENCY E
FF
I
OUT
= 2000 mA (main) T
C
= +25°C 76 7 6 %
I
OUT
= ±167 mA (dual)
T
C
= ±25°C
ISOLATION ISO Input to output or any pin to case (except T
C
= +25°C 100 100 MΩ
pin 7) at 500 V
DC
, Tc = +25°C
LOAD FAULT POWER
DISSIPATION
3
P
D
Over Load, T
C
= +25°C
5
T
C
= +25°C 8 8 W
Short Circuit, T
C
= +25°C 6 6 W
SWITCHING FREQUENCY F
S
I
OUT
= 2000 mA (main) 225 275 225 275 kHz
I
OUT
= ±167 mA (dual)
INHIBIT OPEN CIRCUIT V
OI
913 913 V
VOLTAGE
Conditions ATO2812T/HB ATO2815T/HB
-55°C - Tc - +125°C, VIN = 28 VDC Limits Limits Units
Test Symbol ±5%, CL=0, unless otherwise specified Min Max Min Max
STATIC CHARACTERISTICS
OUTPUT
Voltage
1
V
OUT
I
OUT
= 0 (main) T
C
= 25°C 4.95 5.05 4.95 5.05 V
Over Temp 4.90 5.10 4.90 5.10 V
I
OUT
= 0 (dual)
1
T
C
= 25°C ±11.88 ±12.12 ±14.85 ±15.15 V
Over Temp ±11.76 ±12.24 ±14.70 ±15.30 V
Current
1,2,3
I
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 0.0 2000 0.0 2000 mA
V
IN
= 16, 28, and 40 V
DC
(dual)
1
0.0 ±208 0.0 ±167 mA
Ripple Voltage
1,4
V
RIP
V
IN
= 16, 28, and 40 V
DC
80 80 mV p-p
BW =
DC
to 2 MHz (main)
V
IN
= 16, 28, and 40 V
DC
40 40 mV p-p
BW =
DC
to 2 MHz (dual)
Power
1,2,3
P
OUT
V
IN
= 16, 28, and 40 V
DC
(main) 1 0 10 W
(+dual) 2.5 2.5 W
(-dual) 2.5 2.5 W
(total) 15 15 W
REGULATION
Line
1,3
VR
LINE
V
IN
= 16, 28, and 40 V
DC
25 25 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
(dual) T
C
= 25°C ±30 ±35 mV
I
OUT
= 0, ±84, ±167 mA (dual) Over Temp ±60 ±7 5 mV
Load
1,3
VR
LOAD
V
IN
= 16, 28, and 40 V
DC
50 50 mV
I
OUT
= 0, 1000, 2000 mA (main)
V
IN
= 16, 28, and 40 V
DC
±60 ±75 mV
I
OUT
= 0, ±84, ±167 mA (dual)
INPUT
Current I
IN
I
OUT
= 0, inhibit (pin 8) 15 15 mA
tied to input return (pin 10)
I
OUT
= 0, inhibit (pin 2) = open 40 40 mA
Ripple Current
4
I
RIP
I
OUT
= 2000 mA (main) 50 50 mA p-p
I
OUT
= ±167 mA (dual)
BW =
DC
to 2 MHz
EFFICIENCY E
FF
I
OUT
= 2000 mA (main) T
C
= +25°C 76 7 6 %
I
OUT
= ±167 mA (dual)
T
C
= ±25°C
ISOLATION ISO Input to output or any pin to case (except T
C
= +25°C 100 100 MΩ
pin 7) at 500 V
DC
, Tc = +25°C
LOAD FAULT POWER
DISSIPATION
3
P
D
Over Load, T
C
= +25°C
5
T
C
= +25°C 8 8 W
Short Circuit, T
C
= +25°C 6 6
SWITCHING FREQUENCY F
S
I
OUT
= 2000 mA (main) 225 275 225 275 kHz
I
OUT
= ±167 mA (dual)
INHIBIT OPEN CIRCUIT V
OI
913 913 V
VOLTAGE
Notes:
1. Tested at each output.
2. Parameter guaranteed by line and load regulation tests.
3. At least 20 percent of the total output power should be taken from the (+5 volt) main output.
4. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power
dissipation.
6. Above 125°C case temperature, derate output power linearly to 0 at 135°C case.
4
SPECIFICATIONS
TCASE = -55°C to +125°C, VIN = +28 V ±5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5 V to +50 V
Power Output Internally limited, 17.5W typical
Soldering 300°C for 10 seconds
Temperature Range6Operating -55°C to 135°C case
Storage -65°C to +135°C
BLOCK DIAGRAMS
MECHANICAL OUTLINE
1.00
(25.400)
1.350 max
(34.290)
0.162D 2 places
(4.115)
2.700 max
(68.580)
1.950 max
(49.530)
0.500
12.700
x
Pin #1
2.360
(59.944)
4 x 0.400
(10.160) 1.600
(40.640)
=
max
0.040D
(1.016) 0.260L
(6.604)
1.00
(25.400)
1.345
(34.163)
1.950 max
(49.530)
0.500 max
12.700
x
Pin #1
4 x 0.400
(10.160) 1.600
(40.640)
=0.040D
(1.016) 0.260L - 10 plcs
(6.604)
.050R max 1.350 max
(34.290)
Standard
ERROR
AMP
& REF
3
5
4
CONTROLLER
10
INPUT
FILTER
8
1
REGULATOR
& OUTPUT
FILTER
OUTPUT
FILTER 2
PIN DESIGNATION
Pin 1 Positive Input Pin 10 Input Common
Pin 2 +5VDC Output Pin 9 N/C
Pin 3 Output Common Pin 8 Inhibit Input
Pin 4 Neg. Dual Output Pin 7 Case Ground
(12/15VDC)
Pin 5 Positive Output Pin 6 N/C
(12/15VDC)
ERROR
AMP
& REF
3
5
4
CONTROLLER
10
INPUT
FILTER
8
1
REGULATOR
& OUTPUT
FILTER
OUTPUT
FILTER 2
5
CH & HB SCREENING PROCESS
Per MIL-STD-883C
PART NUMBER
ATO 28xx T x / xx
Model Temperature Range
Omit for -55°C to +85°C
Input Voltage ES - -55°C to +105°C
HB - -55°C to +125°C
Output Voltage CH- -55½C to +125½C
12 - 15VDC Package Option
15 - 15VDC Omit For Standard
F - Flange
Triple Output
STANDARDIZED MILITARY DRAWING
CROSS REFERENCE
Standardized Vendor Vendor
military drawing CAGE similar
number PIN
5962-9095401HXX 52467 ATO2815T/CH
5962-9095401HZX 52467 ATO2815TF/CH
5962-9160201HXX 52467 ATO2812T/CH
5962-9160201HZX 52467 ATO2812TF/CH
ATO2815T EFFICIENCY
6
Efficiency (%)
Output Power (Watts)
0 5 10 15 20
Test Inspection Method Conditlon
Pre-Seal Internal Visual 2017
Stabilization Bake 1008 C
Temperature Cycling 1010 C
Constant Acceleration 2001 A, Y1 direction
Burn-in 1015 TC = +125
°C
Final Electrical Test TC = -55
,+25,+125°C
External Visual 2009
Gross Leak 1014 C
Fine Leak 1014 A
* CH includes element evaluation
85
80
75
70
65
Test Inspection Method
Constant Acceleration 2001, 500g's
Burn-in 1015, 96 hrs.
Final Electrical 25
°C only
* Non-suffixed
ES SCREENING PROCESS
Same as HB screening except as follows:
NOTES
7
MIL-STD-1772
Qualified
2270 Martin Avenue
Santa Clara CA 95050-2781
(408) 988-4930 FAX (408) 988-2702
9502
NOTES
©Lambda Advanced Analog
The information in this data sheet has been carefully checked and is believed to be accurate, however,
no responsibility is assumed for possible errors. The specifications are subject to change without notice.
