ASTEC APC18T04

Technical Reference Notes
APC18T04 Series
APC18T04 Series: 3.0-5.5Vin / 18A Non-Isolated Point-of-Load
The APC18 DC-DC Power Module is a high efficiency non-isolated buck converter designed for use in a wide variety of
applications. Packaged in an industry standard recognized SMT footprint: 1.3” x 0.53”, it works from a wide input voltage
range of 3V to 5.5V and offers a wide adjustable output range of 0.75V to 3.3V through external resistor programming.
Electrical Parameters
Input
Input Range
Input Surge
3V to 5.5VDC
6V / 100ms
Control
Enable
TTL compatible
(Positive or Negative Logic Enable Options)
Output
Special Features
•
•
•
•
•
•
•
•
Industry Standard SMT Footprint
High Efficiency up to 95% at 3.3V output
Adjustable output through external resistor
programming
Low output ripple and noise
Input UVLO
Fixed Switching Frequency
Positive Enable
Remote Sense pin
Load Current
Line/Load Regulation
Ripple and Noise
Output Voltage
Adjust Range
Transient Response
Remote Sense
Over Current
Protection
Over Temperature
Protection
Up to 18A max (Po ≤ 60W)
< 0.5% VO
50mVP-P max
0.75 –3.3VO
300mV deviation (typical)
50% load change
25µ
µs settling time (typical)
+10%VO
150% IO
120 °C max
Environmental Specifications
Safety
•
•
•
UL + cUL 60950, Recognized
EN60950 through TUV-PS
-40ºC to 85ºC Operating Temperature
-40ºC to 125ºC Storage Temperature
MTBF > 1 million hours
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Technical Reference Notes
APC18T04 Series
Electrical Specifications
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings can cause permanent damage to the converter. Functional
operation of the device is converter is not implied at these or any other conditions in excess of those given in the
operational section of the specs. Exposure to absolute maximum ratings for extended period can adversely affect
device reliability.
Parameter
Input Voltage
Continuous
Transient (100ms)
Isolation Voltage
Input to Output
Operating Temperature
Storage Temperature
Operating Humidity
Max Voltage at Enable Pin
Max Output Power
Device
Symbol
Min
Typ
Max
Unit
All
VIN
VIN, trans
-
-
6
-
Vdc
NA
-40
-40
10
-
-
85
125
85
15
60
ºC
ºC
%
Vdc
W
All
All
All
All
All
Ta
TSTG
-
Device
All
Symbol
VIN
Min
3.0
Typ
3.3 / 5.0
Max
5.5
Unit
Vdc
2.9
2.6
3.0
2.7
18
Vdc
IIN-MAX
2.7
2.4
-
3.3Vo
0.75Vo
All
100
0.8
0.5
150
W
II1
-
mAp-p
All
I2t
0.1
A2s
INPUT SPECIFICATION
Parameter
Operating Input Voltage Range
Input Under-Voltage Lock-out
T_ON Threshold
T_OFF Threshold
Input Current1
(VIN = VIN, Min; IO = IO, Max)
Max Pdiss @ IO = 0A
(VIN = VIN, Nom)
Input Ripple Current2
5Hz to 20MHz
Inrush Transient
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JULY 27, 2005 - REVISION A
All
All
A
SHEET 2 OF 13
Technical Reference Notes
APC18T04 Series
Electrical Specifications (continued)
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 Noise3
Peak-to-Peak: (5Hz to 20MHz)
Output Current4
External Load Capacitance
Cap ESR ≥ 1 mΩ
Cap ESR ≥ 10 mΩ
Output Current-limit Inception5
Device
Symbol
VO,SET
Min
0.74
Typ
0.75
Max
0.76
Unit
Vdc
All
All
All
All
-
-
15
25
0.5
30
0.5
50
%
mV
%
mVp-p
All
IO
0
-
18
A
150
1000
5000
250
µF
µF
%Io
100
110
120
°C
All
All
IO
Over Temperature Range5
All
Efficiency
VIN = 5VIN-NOM, IO = IO,MAX ;
TA=25°C, 200LFM
0.75V
1.20V
1.50V
1.80V
2.50V
3.30V
η
η
η
η
η
η
80
85
87
88
91
93
82
87
89
90
92.5
95
-
%
%
%
%
%
%
All
-
-
3
6
ms
VIN = VIN-MIN to VIN-MAX
IO = IO,MIN to IO,MAX
Switching Frequency
All
-
-
-
14
ms
All
-
250
300
350
kHz
Output Turn-on Overshoot
Output Turn-off undershoot
(Passive Resistive Full Load)
Output Enable ON/OFF
Positive Enable
Enable Pin Voltage: Mod-ON
Mod-OFF
All
-
-
-
2
-0.5
%Vo
V
All
-
2.4
0
-
15
0.8
V
V
(AVG. PCB TEMP, measured at R11 location)
Output voltage rise time
VIN = VIN-MIN to VIN-MAX
Enable to Output Turn-ON Delay
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Technical Reference Notes
APC18T04 Series
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS
Parameter
Dynamic Response (CO = 10uF
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 (CO = 150uF
x2 Special Polymer Aluminum
Capacitors)
Load Change of 50% step
anywhere between 10% to 100%
of rated load
All
-
Min
Typ
Max
Unit
-
2.5
-
A/µs
-
300
25
350
50
mV
µs
∆IO/∆t
2.5
All
150
150
200
200
3.63
mV
µs
V
-
10%
V
Peak Deviation
Settling Time to VO, Nom <5%
Peak deviation
Output Voltage Trim Range6
All
Remote Sense
All
0.75
A/µs
NOTE: 1.
2.
3.
4.
The converter is not internally fused.
External input capacitance required. See Figure 1.
Refer to Appendix A3 for the output ripple and Noise Test Measurement Setup.
Output current limited by 60W/Vo. Output Power Derating applies at elevated temperature. See Thermal
Derating Curves.
5. OCP and OTP are in hiccup mode. The converter will auto restart once the fault is removed.
6. The voltage difference between input and output must be greater than 0.7V.
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Technical Reference Notes
APC18T04 Series
Electrical Specifications (continued)
SAFETY AGENCY / MATERIAL RATING / ISOLATION
Parameter
Safety Approval
Device
All
Material Flammability Rating
Input to Output Insulation Type
All
All
UL/cUL 60950, Flammability and Temperature Rise,
TUV EN 60950
UL94V-0
Non-Isolated
Figure 1. Input Reflected-ripple Test Set-up
Measure input reflected current with a simulated source inductance L1 of 1uH.
Capacitor Cin offsets possible battery impedance. Measure current as shown above.
Figure 2. Peak-to-Peak Output Noise Measurement Test Set-up
Note:
(1) Use C1 = [email protected] X7R ceramic capacitor and a [email protected] tantalum capacitor.
(2) Use C2 = 2 x 150uF/6.3V special polymer (Panasonic: EEFUE0J151R)
(3) Scope measurement should be made using a BNC socket.
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Technical Reference Notes
APC18T04 Series
Typical Application Circuit
Figure 3. Typical Application Circuit
Input Capacitors:
C1, C2: 100uF/16V Tantalum (Panasonic: EEFUE0K101R)
C3: 2.2uF/6.3V Ceramic
Output Capacitors:
C4, C5: 150uF/6.3V special polymer (Panasonic: EEFUE0J151R)
C6: 1uF/6.3V ceramic
Enable Pin
The converter comes with an Enable pin primarily used to turn ON/OFF the converter. The converter is disabled (OFF) when
the voltage across the Enable pin and ground is between 0V to 0.8V. The converter is Enabled (ON) when the voltage across
the Enable pin and ground is between 2.4V to 15V (or the Enable Pin is left open).
Output Trim
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 = 0.75V
TRIM-UP EQUATION:
(1)
Where Rtrim is the resistance value in ohms and VO in Volts is the output voltage desired.
Table Rtrim values for different output voltage adjustment
Vo (V)
Rtrim (KΩ) from Equation (1)
Rtrim (KΩ) from E96
MODEL: APC18T04 SERIES
JULY 27, 2005 - REVISION A
0.75
open
open
1.2
41.97K
42.2K
1.5
23.08K
23.2K
1.8
15K
15K
2.1
10.53K
10.50K
2.5
6.95K
6.98K
3.3
3.16K
3.16K
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Technical Reference Notes
APC18T04 Series
Performance Curves
Pow er Dissipation vs. Output Current, 0.75Vout
Efficiency vs. Output Current, 0.75Vout
95%
5
Power Dissipation [W]
90%
Efficiency [%]
85%
80%
75%
70%
65%
Vin = 3.0Vdc
Vin = 3.3Vdc
60%
4
3
2
Vin = 3.0Vdc
1
Vin = 3.3Vdc
Vin = 5.5Vdc
Vin = 5.5Vdc
0
55%
0
3
6
9
12
Output Current [A]
15
0
18
Figure 4. Efficiency vs. Load Current at ambient
temperature, TA = 25°C.
3
6
9
12
Output Current [A]
15
18
Figure 5. Power Dissipation vs. Load Current at ambient
temperature, TA = 25°C.
Efficiency vs. Output Current, 2.5Vout
Pow er Dissipation vs. Output Current, 2.5Vout
5
95%
Power Dissipation [W]
Efficiecny [%]
90%
85%
80%
75%
70%
Vin = 3.0Vdc
65%
Vin = 3.3Vdc
60%
4
3
2
Vin = 3.0Vdc
1
Vin = 3.3Vdc
Vin = 5.5Vdc
Vin = 5.5Vdc
0
55%
0
3
6
9
12
Output Current [A]
15
Figure 6. Efficiency vs. Load Current at ambient
temperature, TA = 25°C.
MODEL: APC18T04 SERIES
JULY 27, 2005 - REVISION A
18
0
3
6
9
12
Output Current [A]
15
18
Figure 7. Power Dissipation vs. Load Current at ambient
temperature, TA = 25°C
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Technical Reference Notes
APC18T04 Series
Performance Curves (continued)
Pow er Dissipation vs. Output Current, 3.3Vout
Efficiency vs. Output Current, 3.3Vout
5
95%
Power Dissipation [W]
Efficiecny [%]
90%
85%
80%
75%
70%
65%
Vin = 5.0Vdc
60%
Vin = 5.5Vdc
4
3
2
Vin = 5.0Vdc
1
Vin = 5.5Vdc
0
55%
0
3
6
9
12
Output Current [A]
15
0
18
Figure 8. Efficiency vs. Load Current at ambient
temperature, TA = 25°C.
6
9
12
Output Current [A]
15
18
Figure 9. Power Dissipation vs. Load Current at ambient
temperature, TA = 25°C
APC18T04 @ 5.0 Vin
APC18T04 @ 3.0 Vin
20
Output Current (A)
20
Output Current (A)
3
15
10
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
15
10
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
65
70
75
80
Ambient Temperature (ºC)
85
Figure 10. Output Power Derating Curve for 0.75VOUT
at VIN = 3V, TA = 25°C
MODEL: APC18T04 SERIES
JULY 27, 2005 - REVISION A
65
70
75
80
Ambient Temp (ºC)
85
Figure 11. Output Power Derating Curve for 0.75VOUT
at VIN = 5V, TA = 25°C
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Technical Reference Notes
APC18T04 Series
Performance Curves (continued)
APC18T04 @ 5.0 Vin
APC18T04 @ 5.0 Vin
20
15
10
Output Current (A)
Output Current (A)
20
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
15
10
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
65
70
75
80
Ambient Temp (ºC)
85
Figure 12. Output Power Derating Curve for 1.5VOUT at
VIN = 5V, TA = 25°C
65
70
80
85
Figure 13. Output Power Derating Curve for 1.8VOUT at
VIN = 5V, TA = 25°C
APC18T04 @ 5.0 Vin
APC18T04 @ 5.0 Vin
20
Output Current (A)
20
Output Current (A)
75
Ambient Temp (ºC)
15
10
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
15
10
0 LFM
100 LFM
200 LFM
300 LFM
400 LFM
5
0
65
70
75
Ambient Temp (ºC)
80
85
Figure 14. Output Power Derating Curve for 2.5VOUT at
VIN = 5V, TA = 25°C
MODEL: APC18T04 SERIES
JULY 27, 2005 - REVISION A
65
70
75
Ambient Temp (ºC)
80
85
Figure 15. Output Power Derating Curve for 3.3VOUT at
VIN = 5V, TA = 25°C
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Technical Reference Notes
APC18T04 Series
Performance Curves (continued)
Figure 16. Output Startup Waveform for 0.75VOUT at
VIN = 5V, IOUT = 18A.
Figure 17. Output Startup Waveform for 3.3VOUT at
VIN = 5V, IOUT = 18A.
Figure 18. 2V5 Output Ripple Waveform at Vin = 3V,
Iout = 18A, TA = 25°C.
Figure 19. 2V5 Output Ripple Waveform at Vin = 3.3V,
Iout = 18A, TA = 25°C.
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Technical Reference Notes
APC18T04 Series
Performance Curves (continued)
Figure 20. 2V5 Output Ripple Waveform at Vin = 5.5V,
Iout = 18A, TA = 25°C.
Figure 21. 2V5 Output Enable Turn On Characteristic at
at Vin = 3.3V, TA = 25°C.
Figure 22. 2V5 Output Transient Response (100% to
50%Iomax) at Vin = 3.3V, TA = 25°C.
Figure 23. 2V5 Output Transient Response (50% to
100%Iomax) at Vin = 3.3V, TA = 25°C.
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Technical Reference Notes
APC18T04 Series
Mechanical Specifications
Parameter
Dimension
Device
All
Symbol
L
W
H
Weight
All
PIN DESIGNATION
VIN
GND
VO
+Input Voltage
Return for VIN and VO
+Output
Min
-
Typ
-
Max
1.3 [33.02]
0.53 [13.46]
0.33 [8.33]
Unit
in [ mm ]
in [ mm ]
in [ mm ]
-
5.8 [0.21]
-
g [oz]
SENSE
TRIM
ENABLE
+Output Sense Pin
VO Adjust
ON/OFF
Figure 24. Mechanical Outline
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Technical Reference Notes
APC18T04 Series
RECOMMENDED LOCATION FOR PICK AND PLACE
The flat top surface of the large inductor (topside of the
board) provides a versatile and convenient way of
picking up the module (See Figure 25). A 6-7mm
outside diameter nozzle from a conventional SMD
machine is recommended to attain maximum vacuum
pick-up. Nozzle travel and rotation speed should be
controlled to prevent this off-centered picked-up
module from falling off the nozzle. The use of vision
recognition systems for placement accuracy will be
very helpful.
Figure 25. Pick-up location
RECOMMENDED REFLOW PROFILE
REFLOW NOTES / RECOMMENDATIONS
240
2.
3.
Refer to the recommended Reflow Profile per
Figure 26. Profile parameters exceeding the
recommended maximums may result to
permanent damage to the module.
The module is recommended for topside reflow
process to the host card. For other orientations,
contact factory.
In the event that the module needs to be
desoldered from the host card, some pins may
be detached from the module.
PEAK TEMPERATURE
200°°C - 230°°C
220
200
TEMPERATURE (deg C)
1.
183°°C
180
REFLOW
ZONE
160
140
< 80 sec
110°°C
120
PRE-HEAT ZONE
120 - 180 sec
100
80
SLOPE
< 4°°C /sec
60
40
20
0
0
30
60
90
120
150
180
210
240
270
300
TIME (seconds)
Figure 26. Recommended Reflow profile.
PART NUMBERING SCHEME
APC
O/P CURRENT
O/P VOLTAGE
I/P Voltage
18
T
04
18 = 18A
T = 0.75 – 3.3V
04 = 3.0 – 5.5V
OPTIONS
-
9
9 = output adjust
(J)
J = Tray packaging
Non “J” = T&R packaging
Please call 1-888-41-ASTEC for further inquiries
or visit us at www.astecpower.com
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