ASTEC APA18T04

Technical Reference Note
APA18T04 DC - DC Series
APA18T04 – 3.0-5.5Vin, 18A, Non-isolated DC – DC SIP Converter
The single output APA18T04 is a non-isolated, 60W, SIP footprint Point-of-Load (POL) DC/DC converter. The new
APA18T04 series can deliver an adjustable output voltage range from 0.75V – 3.3V at 18 Amps (A) with efficiency as high
as 93.5%, and the input voltage range is from 3.0 – 5.5V.
Electrical Parameters
Input
Input range
Input Surge
Efficiency
Special Features
•
•
•
•
•
•
•
•
Point of Load (POL) applications
High current slew rate at 1A/uS
Industry standard footprint
Open frame SIP
-40°C to +85°C Ambient operating temperature
Positive enable function
Low output ripple and noise
Adjustable output voltage through external resistor
programming
• Regulation to zero load
Environment Specifications
-40°C to +85°C Operating temperature
-40°C to +125°C Storage temperature
MTBF: >1 million hours
ROHS Compliant
3.0 to 5.5 VDC
6V / 100ms
[email protected] (Typical)
Output
Load current
Line Regulation
Load Regulation
0.75Vo
0.75 < Vo < 3.3V
3.3V ≤ Vo
18Amax (Po ≤ 60W)
< 0.5%
10mV
15mV
30mV
Noise / Ripple
50mV p-p max
Enable
TTL compatible
Transient Response
300mV typical deviation
For load change of 50% step
Between 10% to 100% of load
100uS(max) recovery
(with ouput cap
100uF Tantalum +
1uF ceramic)
Remote Sense
Turn on input voltage
Over Temperature
Protection
+10% Vo
2.7 –3.0V (Typ)
120°C
OCP/OTP
Hiccup – auto recovery
Safety
UL, cUL
TUV
60950 Recognized
EN60950 Licensed
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APA18T04 SERIES
THIS TECHNICAL REFEENCE NOTES COVERS THE SPECIFICATIONS FOR A SINGLE OUTPUT,
OPEN-FRAME, NON-ISOLATED DC-DC CONVERTER WITH ADJUSTABLE OUTPUT FROM 0.75V TO
3.3V HAVING 59.4W MAXIMUM OUTPUT POWER WHEN OPERATED FROM A NOMINAL 5 VDC
SOURCE. THE MECHANICAL OUTLINE IS 50.8MM X 12.7MM X 8.1MM AND OFFERED IN SIP
TERMINATION. MODELS IN THE FAMILY ARE OUTLINED BELOW.
MODEL NUMBER
APA18T04-9
APA18T04-9H
SIS CODE
APA18T04-9
APA18T04-9H
Vin range
3V – 5.5V
3V – 5.5V
Vout/Iout
0.75V – 3.3V / 18A*
0.75V – 3.3V / 18A*
MODEL ID NO
D892
D893
*Options:
Suffix
Option
-9
Vo Trim, Vertical Mounting Pin, RoHS compliance
-9H
Vo Trim, Horizontal Mounting Pin, RoHS compliance
Note: * 18A maximum output current with total power limited to 59.4W.Output voltage is set to 0.7525V
(fty default).
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
Electrical Specifications
The product shall comply with the requirements of this specification for all valid conditions of line input voltage,
load current, temperature and other environmental conditions, unless otherwise specified in this document.
Description
External Input Fuse1,2
External Input Capacitance
External Output Capacitance
+VIN
Enable
GND
Trim
+Vout
Airflow3
TA (Ambient Temperature)
LITTLEFUSE 314025(25A fast
acting fuse)
As specified by Appendix A2, and 4
As specified by Appendix A3, and 4.
3.3Vdc/5Vdc (nominal Input
Voltage)
Open
Return for both VIN and VO
Resistor Programming [See App A6]
Output Pin connected to Load
200LFM/300LFM
-40ºC to 85ºC
NOTE: 1. Refer to Appendix A4 for typical application circuit.
2. The converter is not internally fused; Engineering needs to specify a fuse appropriate
to the package size of the converter.
3. Refer to Appendix A1 for correct airflow and module orientation & Appendix B for the
derating curves of different airflow.
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. Functional
operation of the device is not implied at these or any other conditions in excess of those given in the operational
sections of this specification. Exposure to absolute maximum ratings for extended periods can adversely affect
device reliability. The converter shall be designed, labeled and safety approved for maximum continuous rating as
follows:
Parameter
Input Voltage
Continuous
Transient (100ms)
Operating Temperature
Storage Temperature
Operating Humidity
Max Voltage at Enable Pin
Max Output Power
4.3
Device
Symbol
Min
Typ
Max
Unit
All
VIN
VIN, trans
Ta
TSTG
-
-0.3
-40
-55
10
-
-
6
8
85
125
85
12
59.4
Vdc
Symbol
VIN
Min
3.0
Typ
3.3/5.0
Max
5.5
Unit
Vdc
2.7
2.4
-
2.9
2.6
3.0
2.7
18.0
Vdc
-
0.5
0.3
300
W
mAp-p
All
NA
-
-
V/ms
All
NA
-
-
Apk
All
All
All
All
All
ºC
ºC
%
Vdc
W
INPUT SPECIFICATIONS
Parameter
Operating Input Voltage Range
Input Under-Voltage Lock-out
T_ON Threshold
T_OFF Threshold
Input Current
(VIN = VIN, Min ; IO = IO, Max)
Max Pdiss @ IO = 0A
(VIN = VIN, Nom, TA=25°C)
Input Ripple Current1
5Hz to 20MHz
Input Voltage Rise Time
10% to 90% of Vout
Inrush Current
dVIN/dt
Device
All
0.75V=Vo
<2.5V
T04
Vo:3.3V
Vo:0.75V
All
IIN-MAX
II1
A
NOTE: 1. External input capacitance required. See Input Ripple Current test measurement setup on Appendix A2.
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
OUTPUT SPECIFICATIONS
Parameter
Output Voltage Set point
VIN = VIN, MIN to VIN,MAX;
IO = IO, max
Output Regulation
Line: VIN = VIN, min to VIN, max
Load: IO = IO, min to IO, max
Temp: TA = -40 ºC to +85ºC
Ripple and Noise2
Peak-to-Peak: (5Hz to 20MHz)
Output Current and output
power3
External Load Capacitance
Cap ESR = 1 mO
Cap ESR = 10 mO
Output Current-limit Inception
VOUT = 90% VO,SET4,10
Over Temperature Range6
Device
Symb
ol
VO,SET
Min
0.74
Typ
0.7525
Max
0.76
Unit
Vdc
All
0.75V
0.75<Vo<3.3V
3.3V≤Vo
All
-
-
-
0.5
10.0
15.0
30.0
1.0
%
mV
mV
mV
%
All
-
-
25
55
mVp-p
All
Io
Po
0
0
-
18
59.4
A
W
µF
µF
A
°C
All
All
IO
18.5
-
1000
5000
50
All
-
100
110
120
0.75V
1.20V
1.50V
1.80V
2.50V
3.30V
η
η
η
η
η
η
78.4
83.7
86.4
88
91
93
82
87
89
90
92.5
95
All
All
-
2.0
-
-
6.0
8
ms
ms
All
-
-
-
20.0
ms
All
All
-
250
-
300
-
350
5
KHz
%Vo
(AVG. PCB TEMP)
Efficiency9
VIN = 5V,
IO = IO,MAX ; TA=25°C
Turn-On Response Time5
VIN = VIN-MIN to VIN-MAX
Enable to Output Turn-ON Delay
VIN = VIN-MIN to VIN-MAX
IO = IO,MIN to IO,MAX
+VIN to Output Turn-On Delay
Enable Pin: Active
VIN = VIN-MIN to VIN-MAX
IO = IO,MIN to IO,MAX
Switching Frequency
Output Overshoot
at T-on / T-off
Passive Resistive Full Load
Model: APA18T04 Series
Date: Aug 2005
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%
%
%
%
%
%
Technical Reference Note
APA18T04 DC - DC Series
OUTPUT SPECIFICATIONS
Parameter
Dynamic Response6 (CO = 100uF
Tantalum + 1uF ceramic)
Load Change of 50% step
anywhere between 10% to 100%
of rated load
Device
Symbol
∆IO/∆t
-
Peak Deviation
Settling Time to VO, Nom <5%
Peak deviation
Dynamic Response 6(CO = 150uF
x2 Special Polymer Aluminum
Capacitors+10uF Tantalum Cap.
+1uF Ceramic Cap.)
Load Change of 50% step
anywhere between 10% to 100%
of rated load
All
-
∆IO/∆t
Min
Typ
Max
Unit
-
2.5
-
A/µs
-
300
100
350
150
mV
µs
2.5
A/µs
mV
Peak Deviation
150
200
All
µs
Settling Time to VO, Nom <5%
150
200
Peak deviation
Output Voltage Trim Range7
All
0.74
3.63
V
Remote Sense8
All
10%
V
Output Enable ON/OFF
All
Positive Enable *
2.4
12.0
V
Enable Pin Voltage: Mod-ON
Mod-OFF
-0.7
0.8
V
* Module is enabled with Enable Pin open
NOTE: 2. Refer to Appendix A3 for the Output Ripple and Noise Test Measurement Setup.
3. Output Power Derating applies at elevated temperature. See Appendix B for the Derating Curves.
4. OCP and OTP are in hiccup mode. The converter will auto restart once the fault is removed. OCP is not
precise with Vin varying . OTP along with OCP will protect the converter under typical overload
condition.
5. Measure output rise time from 10%VO to 90%VO. See Appendix A5.
6. Load step response shall be measured at the load side of the output capacitors. See Appendix A4 for
the output and input cap requirement.
7. See appropriate Trim Equation and configuration in Appendix A6. The voltage difference between
input and output must be greater than 0.7V.
8. The combination of remote sense and output trim adjust cannot exceed 0.25V.
9. A tested correlation factor may be used to justify the minimum efficiency specification to facilitate
manufacturing test for the units under test with contact (non-soldering) type of connections, for example
pogo pin’s type of connection.
10.Under 25°C.
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A1: CONVERTER ORIENTATION WRT TO AIRFLOW
Figure 1. Airflow Orientation and Thermal Test Setup
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A2: INPUT REFLECTED RIPPLE TEST SETUP
L1
Vin+
Vin
Vo
Vo+
APA18
Cin
1000uF
C1
150uF
C2
150uF
C3
2.2uF
C4
150uF
Trim
C5
150uF
C6
1uF
Enable
Gnd
R1
Vin-
Vo-
Figure 2. Input Reflected-ripple current Test Setup.
Note: Measure input reflected-ripple current with a simulated source inductance (Ltest) of 1uH. Capacitor Cs offsets
possible battery impedance. Measure current as shown above.
Input capacitors:
C1,C2: Use 150uF/6.3V special polymer(Sanyo 6TPE150M ,or Panasonic EEFUE0J151R).C3: 2.2uF/6.3V Ceramic
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A3: OUTPUT RIPPLE TEST SETUP
Figure 3. Peak-to-Peak Output Noise Measurement Test Setup.
Note:
(1) Use a 1µF @50V X7R ceramic capacitor and a 10µF @ 10V tantalum capacitor.
(2) Use 2 x 150uF/6.3V special polymer(Sanyo 6TPE150M ,or Panasonic EEFUE0J151R)
(3) Scope measurement should be made using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and
3 in.) from module.
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A4: TYPICAL APPLICATION CIRCUIT
SENCE
F1
Vin+
Vin+
VO+
FUSE
APA18T04
Cin1
Cin2
Co1
ENABLE
Vsource
Co2
TRIM
Load
R1
S1
GND
Rtrim
VinFigure 4.Typical Application Circuit
F1: Fuse: Use external fuse (Fast-acting type 25A) for each unit.
Input capacitors:
Cin1: 150uF/6V x 2 special polymer (Sanyo 6TPE150M,or Panasonic EEFUE0J151R)
Cin2: 47uF/10V x2 Ceramic
Output capacitors:
Co1: 150uF/6.3V x2 special polymer(Sanyo 6TPE150M,or Panasonic EEFUE0J151R)
Co2: 1uF/6.3V ceramic
Figure 5. Dynamic deviation and settling time
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A5: TIMING DIAGRAM
Figure 6. Timing diagram
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX A6: OUTPUT TRIM REQUIREMENT
Output voltage adjustment is accomplished by connecting an external resistor between the Trim Pin and Ground
Pin terminals. Resistance and Output voltage relationship is established by Equation 1. If Trim pin is left open –
default VO = 0.7525V
Rtrim = (
TRIM-UP EQUATION:
21070
− 5110)Ω
Vo − 0.7525
Where Rtrim is the resistance value in ohms and VO is the output voltage desired.
Vo
SENSE
APA18
Co1
Co2
LOAD
TRIM
Rtrim
GND
Figure 7. Trim UP test configuration (Pin Side Up)
VO, set (V)
Rtrim (k? ) from
Equation
Rtrim (k? ) from
E96
0.7525
open
1.2
41.97
1.5
23.08
1.8
15
2.5
6.95
3.3
3.16
open
42.2
23.2
15
6.98
3.16
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX B: THERMAL DERATING CURVES
NOTE: These curves are limited by OTP.
20
18
Output Current (A)
16
14
12
10
300 LFM
8
200 LFM
6
4
100 LFM
2
0 LFM
0
25
35
45
55
65
75
85
Ambient Temperature (oC)
0.75Vout @ 5Vin
20
18
Output Current (A)
16
14
12
10
300 LFM
8
6
200 LFM
4
100 LFM
2
0 LFM
0
25
35
45
55
65
75
85
Ambient Temperature ( oC)
1.2Vout @ 5Vin
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
20
18
Output Current (A)
16
14
12
10
8
300 LFM
6
200 LFM
4
100 LFM
2
0 LFM
0
25
35
45
55
65
75
85
75
85
o
Ambient Temperature ( C)
1.5Vout @ 5Vin
20
18
Output Current (A)
16
14
12
10
8
300 LFM
6
200 LFM
4
100 LFM
2
0 LFM
0
25
35
45
55
65
o
Ambient Temperature ( C)
1.8Vout @ 5Vin
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
20
18
Output Current (A)
16
14
12
10
8
300 LFM
6
200 LFM
4
100 LFM
2
0 LFM
0
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
2.5Vout @ 5Vin
20
18
Output Current (A)
16
14
12
10
300 LFM
8
200 LFM
6
4
100 LFM
2
0 LFM
0
25
35
45
55
65
75
85
o
Ambient Temperature ( C)
3.3Vout @ 5Vin
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
APPENDIX C: MODULE PIN ASSIGNMENT
PIN #
+VIN
Enable
GND
Sense
DESIGNATION
+ Input Voltage
ON/OFF
Return for VIN and VO
+Output Sense pin
PIN #
VO
Trim
DESIGNATION
+Output
VO Adjust
Note: The pinout assignment of APA18T04-9 and APA18T04-9H are the same.
APPENDIX D: MECHANICAL OUTLINE/DRAWING (for reference only)
Figure 14. APA18 Mechanical Outline/ Drawing for Vertical type
Model: APA18T04 Series
Date: Aug 2005
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Technical Reference Note
APA18T04 DC - DC Series
Figure 15. APA18 Mechanical Outline/ Drawing for Horizontal type
Pin Number
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
Pin Connection
Vo
Vo
SENSE
Vo
GND
GND
Vin
Vin
TRIM
ENABLE
Function
Output Voltage
Output Voltage
Sense
Output Voltage
Ground
Ground
Input Voltage
Input Voltage
Output Voltage Adjustment
Output Voltage Enable
Model: APA18T04 Series
Date: Aug 2005
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