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PD - 94582A
ATO28XXT SERIES
28V Input, Triple Output
HYBRID-HIGH RELIABILITY DC/DC CONVERTER
Description
The ATO28XXT Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial 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 incorporates 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 transformers 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 Numbering section. They are provided in a standard plug-in package for PC mounting or in a flanged package for more severe environments. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet. Variations in electrical, mechanical and screening can be accommodated. Extensive computer simulation using complex modeling enables modest design modifications to be accommodated. Contact IR Santa Clara with specific requirements.
ATO Features
16V to 40VDC Input Range (28VDC Nominal) 5V, 12V or 5V, 15V Outputs Available Indefinite Short Circuit and Overload Protection 15W Output Power Fast Loop Response for Superior Transient Characteristics Operating Temperature Range from -55C to +125C 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 85C Standard Microcircuit Drawings Available
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01/12/07
ATO28XXT Series Specifications
TCASE = -55C to +85C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input voltage Power Output Soldering temperature Temperature Range 6 -0.5V to +50VDC Internally limited, 17.5W typical 300C for 10 seconds Operating case temperature Storage case temperature
Condition -55C TC +85C, VIN = 28 VDC 5%, CL=0 unless otherwise specified
-55C to +115C -65C to +135C
TEST STATIC CHARACTERISTICS OUTPUT 1 Voltage
SYMBOL
ATO2812T Min Max
ATO2815T Min Max Units
VOUT
IOUT = 0 (main) IOUT = 0 (dual)
1
TC = 25C
Over Temp
TC = 25C
Over Temp
Current
1,2,3
IOUT
1,4
Ripple Voltage Power
1,2,3
VRIP POUT
VIN = 16, 28, and 40 VDC (main) 1 VIN = 16, 28, and 40 VDC (dual) VIN = 16, 28, and 40 VDC (dual) BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) Input to output or any pin to case (except pin 7) at 500 VDC Overload Short Circuit IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C
Over Temp
10 2.5 2.5 15 25 35 75 50 75 15 40 50 76 100 8.0 6.0 275 13 8.0 6.0 275 13
REGULATION Line 1,3
VRLINE
Load 1,3
VRLOAD
30 60 50 60 15 40 50 76 100
mV
INPUT Current Ripple Current
4
IIN IRIP
mA mA mAp-p % M W KHz V
EFFICIENCY ISOLATION Load Fault 3 Power Dissipation Switching Frequency Inhibit Open Circuit Voltage
EFF ISO PD FS VOI
TC = 25C TC = 25C TC = 25C
225 9.0
225 9.0
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 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. Above 85C case temperature, derate output power linearly to 0 at 115C case.
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ATO28XXT Series Specifications
TCASE = -55C to +105C, VIN = +28V 5% unless otherwise specified
A bso lu te M axim u m R ating s
In pu t vo ltag e P ow er O utp ut S old erin g te m p era ture T em pe ratu re R an ge 6 -0.5 V to +5 0V D C Inte rna lly lim ited , 17 .5W typ ica l 30 0C for 1 0 secon ds O p era ting ca se tem pe ratu re Sto rag e case te m p era ture
Condition -55C TC +105C, VIN = 28 V DC 5%, C L=0 unless otherwise specified ATO2812T/ES Min STATIC CHARACTERISTICS OUTPUT Voltage 1 Max
-55 C to +1 25 C -65 C to +1 35 C
ATO2815T/ES Min Max Units
TEST
SYMBOL
VOUT
IOUT = 0 (main) IOUT = 0 (dual)
1
Current
1,2,3
TC = 25C Over Temp TC = 25C Over Temp
IOUT VRIP
Ripple Voltage 1,4
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main) VIN = 16, 28, and 40 VDC (dual)1 VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) TC = 25C Input to output or any pin to case (except pin 7) at 500 VDC Overload, TC = +25C5 Short Circuit, TC = +25C IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C Over Temp 30 60 50 60 15 40 50 76
10 2.5 2.5 15 25 35 75 50 75 15 40 50 76
REGULATION Line 1,3
VR LINE
Load 1,3
mV
VR LOAD
INPUT Current Ripple Current 4 EFFICIENCY
IIN IRIP EFF ISO PD FS
mA mA mAp-p %
TC = 25C
ISOLATION Load Fault Power Dissipation 3 Switching Frequency
TC = 25C TC = 25C
100 8.0 6.0 225 9.0 275 13
100 8.0 6.0 225 9.0 275 13
M W
KHz V
Inhibit Open Circuit Voltage
VOI
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 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. Above 105C case temperature, derate output power linearly to 0 at 125C case
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ATO28XXT Series Specifications
TCASE = -55C to +125C, VIN = +28V 5% unless otherwise specified
A bso lu te M axim u m R ating s
In pu t vo ltag e P ow er O utp ut S old erin g te m p era ture T em pe ratu re R an ge 6 -0.5 V to +5 0V D C Inte rna lly lim ited , 17 .5W typ ica l 30 0C for 1 0 secon ds O p era ting ca se tem pe ratu re Sto rag e case te m p era ture
Condition -55C TC +125C, VIN = 28 VDC 5%, CL=0 unless otherwise specified
-55 C to +1 35 C -65 C to +1 35 C
TEST
SYMBOL
ATO2812T/HB Min Max
ATO2815T/HB Min Max Units
STATIC CHARACTERISTICS OUTPUT 1 Voltage
VOUT
IOUT = 0 (main) IOUT = 0 (dual)1
Current
1,2,3 1,4
TC = 25C Over Temp TC = 25C Over Temp
IOUT VRIP
Ripple Voltage
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main) 1 VIN = 16, 28, and 40 VDC (dual) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (main) VIN = 16, 28, and 40 VDC BW = DC to 2 MHz (dual)) VIN = 16, 28, and 40 VDC (main) (+dual) (-dual) (total) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC (dual) IOUT = 0, 84, 167mA (dual) VIN = 16, 28, and 40 VDC IOUT = 0, 1000, 2000mA (main) VIN = 16, 28, and 40 VDC IOUT = 0, 84, 167mA (dual) IOUT = 0, Inhibit (pin 8) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000 mA (main) IOUT = 167mA (dual) BW = DC to 2MHz IOUT = 2000mA (main) IOUT = 167mA (dual) TC = 25C Input to output or any pin to case (except pin 7) at 500 VDC Overload, TC = +25C5 Short Circuit, TC = +25C IOUT = 2000mA (main) IOUT = 167mA (dual)
4.95 4.90 11.88 11.76 0.0 0.0
5.05 5.10 12.12 12.24 2000 208 80 40
4.95 4.90 14.85 14.70 0.0 0.0
5.05 5.10 15.15 15.30 2000 167 80 40
V V V V mA mA mVp-p mVp-p W W W W
10 2.5 2.5 15 25 TC = 25C Over Temp 30 60 50 60 15 40 50
10 2.5 2.5 15 25 35 75 50 75 15 40 50
REGULATION 1,3 Line
VRLINE
Load
1,3
mV
VRLOAD
INPUT Current Ripple Current
4
IIN IRIP EFF
mA mA mAp-p
EFFICIENCY
TC = 25C
76
76
%
ISOLATION Load Fault Power Dissipation
3
ISO PD
TC = 25C TC = 25C
100 8.0 6.0 225 9.0 275 13
100 8.0 6.0 225 9.0 275 13
M W
Switching Frequency FS Inhibit Open Circuit Voltage VOI KHz V
Notes to Specifications
1. 2. 3. 4. 5. 6. Tested at each output. Parameter guaranteed by line and load regulation tests. At least 20 percent of the total output power should be taken from the (+5V) main output. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 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. Above 125C case temperature, derate output power linearly to 0 at 135C case
4
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ATO28XXT Series
Block Diagram
5 + Dual Vout
Regulator
1 +Input 8 Enable Input Input Return 10
EMI Filter
4 - Dual Vout 2 +5V out 3 Output Return
Drive 1
Pulse Width Drive 2 Modulator
FB
Error Amp & Reference
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Drawing Number
5962-90954 5962-91602
Vendor Cage Code 52467 52467
IR Standard Part Number
ATO2815T ATO2812T
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5
ATO28XXT Series
Mechanical Outlines
Non-Flanged
1.000 0.040 D X 0.26 L Pins 0.05
Flanged
10
1
9
2
1.950 Max
4 X 0.400 =1.600
1.95
2.360
2.700 Max
8
3
7
4
6
5
1.350 Max
0.500 Max
0.500 Max
1.350 Max
Pin Designation
Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input +5V Output Output Return - Dual Output + Dual Output NC Case Ground Enable Input NC Input Return
6
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ATO28XXT Series
Device Screening
Requirement
Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration PIND Burn-In Final Electrical ( Group A ) PDA Seal, Fine and Gross Radiographic External Visual MIL-PRF-38534 2023 2017 1010 2001, Y1 Axis 2020 1015 MIL-PRF-38534 & Specification MIL-PRF-38534 1014 2012 2009 N/A Cond A N/A N/A Cond A, C N/A Yes N/A N/A N/A N/A 25C
MIL-STD-883 Method
No Suffix
N/A N/A
ES
N/A N/A Yes Cond B 500 Gs N/A 48 hrs@hi temp 25C
HB
N/A N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C N/A Cond A, C N/A Yes
CH
Class H N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C 10% Cond A, C N/A Yes
-20C to +85C -55C to +125C
-55C to +125C -55C to +125C
160 hrs@125C 160 hrs@125C
Notes:
Best commercial practice Sample tests at low and high temperatures -55C to +105C for AHE, ATO, ATW
Part Numbering ATO 28 15 T F /CH
Model Input Voltage Nominal
28 = 28V
Screening Level Package Style Output
(Please refer to Screening Table)
No Suffix, ES, HB, CH F = Flange Blank = Non-Flanged T = Triple
Output Voltage
12 = 5V 12V 15 = 5V 15V
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 01/2007
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