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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 Output Load current Line Regulation Load Regulation 0.75Vo 0.75 < Vo < 3.3V 3.3V Vo Noise / Ripple Enable Transient Response
(with ouput cap 100uF Tantalum + 1uF ceramic)
3.0 to 5.5 VDC 6V / 100ms 95%@3.3Vo (Typical)
18Amax (Po 60W) < 0.5% 10mV 15mV 30mV 50mV p-p max TTL compatible 300mV typical deviation For load change of 50% step Between 10% to 100% of load 100uS(max) recovery +10% Vo 2.7 -3.0V (Typ) 120C
Special Features
* * * * * * * * Point of Load (POL) applications High current slew rate at 1A/uS Industry standard footprint Open frame SIP -40C to +85C Ambient operating temperature Positive enable function Low output ripple and noise Adjustable output voltage through external resistor programming * Regulation to zero load
Environment Specifications
-40C to +85C Operating temperature -40C to +125C Storage temperature MTBF: >1 million hours ROHS Compliant
Remote Sense Turn on input voltage Over Temperature Protection OCP/OTP
Hiccup - auto recovery
Safety
UL, cUL TUV 60950 Recognized EN60950 Licensed
Model: APA18T04 Series Date: Aug 2005 SH 1 OF 26
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 *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). 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
Model: APA18T04 Series Date: Aug 2005 SH 2 OF 26
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 -40C to 85C
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 SH 3 OF 26
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 Device All All All All All All Symbol VIN VIN, trans Ta TSTG Min -0.3 -40 -55 10 Typ Max 6 8 85 125 85 12 59.4 Unit Vdc C C % Vdc W
4.3
INPUT SPECIFICATIONS Device All 0.75V=Vo <2.5V T04 Vo:3.3V Vo:0.75V All All All Symbol VIN Min 3.0 2.7 2.4 NA NA Typ 3.3/5.0 2.9 2.6 Max 5.5 3.0 2.7 18.0 0.5 0.3 300 Unit Vdc Vdc A W mAp-p V/ms Apk
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=25C) Input Ripple Current1 5Hz to 20MHz Input Voltage Rise Time 10% to 90% of Vout Inrush Current dVIN/dt
IIN-MAX
II1
-
NOTE: 1. External input capacitance required. See Input Ripple Current test measurement setup on Appendix A2.
Model: APA18T04 Series Date: Aug 2005 SH 4 OF 26
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 C to +85C 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
(AVG. PCB TEMP)
Device
Symb ol VO,SET
Min 0.74
Typ 0.7525
Max 0.76
Unit Vdc
All 0.75V 0.75-
-
-
0.5 10.0 15.0 30.0 1.0 55 18 59.4
% mV mV mV % mVp-p A W F F A C % % % % % %
Io Po
0 0
25 -
All All All 0.75V 1.20V 1.50V 1.80V 2.50V 3.30V All All IO 18.5 100 78.4 83.7 86.4 88 91 93 2.0 110 82 87 89 90 92.5 95
1000 5000 50 120
Efficiency9 VIN = 5V, IO = IO,MAX ; TA=25C
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
-
6.0 8
ms ms
All
-
-
-
20.0
ms
All All
-
250 -
300 -
350 5
KHz %Vo
Model: APA18T04 Series Date: Aug 2005 SH 5 OF 26
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 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 Device IO/t Symbol Min Typ 2.5 Max Unit A/s
All IO/t
-
-
300 100 2.5
350 150
mV s A/s
mV Peak Deviation 150 200 All s 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 25C.
Model: APA18T04 Series Date: Aug 2005 SH 6 OF 26
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 SH 7 OF 26
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
Trim Enable Gnd
R1
C4 150uF
C5 150uF
C6 1uF
VinFigure 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
Vo-
Model: APA18T04 Series Date: Aug 2005 SH 8 OF 26
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 1F @50V X7R ceramic capacitor and a 10F @ 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 SH 9 OF 26
Technical Reference Note APA18T04 DC - DC Series
APPENDIX A4: TYPICAL APPLICATION CIRCUIT
F1 Vin+ Vin+ FUSE
SENCE VO+
APA18T04
Cin1 Vsource S1 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 Cin2 ENABLE TRIM Load R1 GND Rtrim Co1 Co2
Figure 5. Dynamic deviation and settling time
Model: APA18T04 Series Date: Aug 2005 SH 10 OF 26
Technical Reference Note APA18T04 DC - DC Series
APPENDIX A5: TIMING DIAGRAM
Figure 6. Timing diagram
Model: APA18T04 Series Date: Aug 2005 SH 11 OF 26
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 TRIM-UP EQUATION:
Rtrim = (
21070 - 5110) 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 open
1.2 41.97 42.2
1.5 23.08 23.2
1.8 15 15
2.5 6.95 6.98
3.3 3.16 3.16
Model: APA18T04 Series Date: Aug 2005 SH 12 OF 26
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 8 6 4 2 0 25 35 45 55 65 75 85
300 LFM 200 LFM 100 LFM 0 LFM
Ambient Temperature (oC)
0.75Vout @ 5Vin
20 18 16
Output Current (A)
14 12 10 8 6 4 2
300 LFM 200 LFM 100 LFM 0 LFM
0 25 35 45 55 65 75 85
Ambient Temperature ( oC)
1.2Vout @ 5Vin
Model: APA18T04 Series Date: Aug 2005 SH 13 OF 26
Technical Reference Note APA18T04 DC - DC Series
20 18 16
Output Current (A)
14 12 10 8 6 4 2
300 LFM 200 LFM 100 LFM 0 LFM
0 25 35 45 55
o
65
75
85
Ambient Temperature ( C) 1.5Vout @ 5Vin
20 18 16
Output Current (A)
14 12 10 8 6 4 2
300 LFM 200 LFM 100 LFM 0 LFM
0 25 35 45 55 65
o
75
85
Ambient Temperature ( C)
1.8Vout @ 5Vin
Model: APA18T04 Series Date: Aug 2005 SH 14 OF 26
Technical Reference Note APA18T04 DC - DC Series
20 18 16
Output Current (A)
14 12 10 8 6 4 2
300 LFM 200 LFM 100 LFM 0 LFM
0 25 35 45 55
o
65
75
85
Ambient Temperature ( C)
2.5Vout @ 5Vin
20 18 16
Output Current (A)
14 12 10 8 6 4 2
300 LFM 200 LFM 100 LFM 0 LFM
0 25 35 45 55
o
65
75
85
Ambient Temperature ( C)
3.3Vout @ 5Vin
Model: APA18T04 Series Date: Aug 2005 SH 15 OF 26
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 SH 16 OF 26
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 SH 17 OF 26

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