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Technical Reference Note (APC08)
Centauri (APC08) Non-Isolated DC/DC Power Module
The Centauri (APC08) DC-DC Power Module is a high efficiency non-isolated buck converter designed for use in a wide variety of applications. It works from a wide input voltage range of 1.8V to 6V or 5V to 13V and offers an extensive array of output voltages starting from 0.9V to 3.6V (up to 6V in some flavors). Through careful layout and component selection it achieves the highest efficiency/load in the smallest footprint available in the market today. It is ideal for Point of Load applications and provides the most flexibility for the ever-changing DSP and ASIC power requirements.
Electrical Parameters
Input Input range Efficiency 1.8-6.0VDC and 5.0-13.0VDC 3.3V @ 93% Typ
Control Enable TTL compatible (Positive Logic)
Industry Standard 0.53 X 1.3 X 0.29H SMT Package
Output Regulation (Line, Load, Temp) Ripple and noise Output voltage adjust range Transient Response
<3% 75mV - (2.5V Output) 50mV - (<2.5V Output) 0.9V to 3.6V (J Version) 5% max deviation with 50% to 75% full load 500 S (max) recovery
Special Features
* * * * * * * * * * * Point of load (POL) applications High efficiency, 3.3V@93% Typ -40C to +85C Ambient Operating Temperature Open Frame SMT Positive enable function Low output ripple and noise Regulation to zero load Programmable Output from 0.9V to 3.6V (External Trim Resistor) Fixed frequency switching (400 KHz) Power Good Signal (Optional) Active Current share (Optional)
Environmental Specifications
* * * Operating temperature: -40C to +85C Storage temperature: -40C to +125C MTBF: >3.3 million hours
Safety
Designed to meet: UL, cUL 60950 Recognized TUV EN60950 Licensed
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Technical Reference Note (APC08)
APC08 SERIES THIS SPECIFICATION COVERS THE REQUIREMENTS For A New 1.3" X 0.53" X 0.33"(H) Maximum 28W Single Output High efficiency Non-Isolated SMT DC-DC Converter
MODEL NAME APC08J03 APC08K03 APC08M03 APC08Y03 APC08G03 APC08F03 APC08J08 APC08K08 APC08M08 APC08Y08 APC08G08 APC08F08 APC05A08 APC04S08
Vin nominal/ Vin range 3.3V / 1.8-6.0V 3.3V / 1.8-6.0V 3.3V / 1.8-6.0V 3.3V / 2.2-6.0V 3.3V / 3.0-6.0V 5.0V / 4.0-6.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V 8V / 5.0-12.0V
Vout/Iout 0.9V, 8A 1.2V, 8A 1.5V, 8A 1.8V, 8A 2.5V, 8A 3.3V, 8A 0.9V, 8A 1.2V, 8A 1.5V, 8A 1.8V, 8A 2.5V, 8A 3.3V, 8A 5V, 5A 6V, 4A
Options (suffix): "-9" = Trim "-9MA" = Trim with Power Good and Active Current Share "-J" = Jedec tray-type packaging "W" = Improved Loop Bandwidth / Transient Response (only for APC08x03 series)
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Technical Reference Note (APC08)
Electrical Specifications
STANDARD TEST CONDITION on a single unit, unless otherwise specified. T A: 25C (Ambient Air) Vin (P1): APC08x03 +1.8V to +6.0V APC08x08 +5.0V to +13V Enable (P5): Open Vo (P2): Connect to load Gnd (P3): Return for Vin and Vo Trim (P4): Open PGood (P6): Open P (P7): Open 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 in any other conditions in excess of those given in the operational sections of the specs. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Input Voltage Continuous Transient (100ms) Continuous Transient (100ms) Operating Temperature Storage Temperature Operating Humidity Device 03 03 08 08 All All All Symbol VIN VIN,trans VIN VIN,trans TA TSTG Min 1.8 5.0 -40 -40 Typ Max 6.0 7.0 13.0 14.0 85 125 85 Unit Vdc Vdc Vdc Vdc C C %
INPUT SPECIFICATIONS Parameter Operating Input Voltage1 Maximum Input Current2 (VIN = 0 to VIN,max; IO = IO,max) Input Ripple Current
5Hz to 20MHz
Device 03 08 All APC05 APC04 All
Symbol VIN IIN,max IIN-1
Min 1.8 5.0 -
Typ 3.3 8.0 -
-
200
Max 6.0 12.0 9.0 6.0 5.0 250
Unit Vdc Vdc A
mAp-p
Note: 1. Minimum VIN (03 device) for 1V8, 2V5 and 3V3 versions are 2V2, 3V and 4V respectively. For 08 device, min VIN for 5V and 6V versions are 7.5Vin and 8.5Vin 2. This power module is not internally fused. The use of an input line fuse (03 Version: GMA-10A; 08 version: GMA-6A Bussman fuses or equivalent) is recommended.
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Technical Reference Note (APC08)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS Parameter Output Voltage Setpoint (VIN=VIN,min to VIN,max at IO=IO,max)1 Device APC08J03 APC08K03 APC08M03 APC08Y03 APC08G03 APC08F03 APC08J08 APC08K08 APC08M08 APC08Y08 APC08G08 APC08F08 APC05A08 APC04S08 All All All 2.5V < 2.5V All 5V 6V Suffix "W" All Suffix "W" All All All APC08J03 APC08K03 APC08M03 APC08Y03 APC08G03 APC08F03 All All Symbol VO,SET Min 0.873 1.164 1.455 1.746 2.425 3.200 0.873 1.164 1.455 1.746 2.425 3.200 4.850 5.820 0 0 0 10 100 74 80 83 85 89 90 Typ 0.9 1.2 1.5 1.8 2.5 3.3 0.9 1.2 1.5 1.8 2.5 3.3 5.0 6.0 11.5 76 81 86 88 91 93 400 Max 0.927 1.236 1.545 1.854 2.575 3.400 0.927 1.236 1.545 1.854 2.575 3.400 5.150 6.180 0.5 0.5 1.5 75 50 8 5 4 5000 500 100 50 Unit Vdc
Output Regulation: Line: VIN=VIN,min to VIN,max Load: IO=IO,min to IO,max Temp: TA= -40 C to 85 C Output Ripple and Noise11 Peak to Peak: 5Hz to 20MHz Output Current Range External Load Capacitance9 Capacitor ESR Output Current Limit Inception3 Output Short Circuit Current4 Efficiency VIN = 1.8V to 6V 1 IO = 8A Resistive Load
IO
% % % mVPK-PK mVPK-PK A F F m m A
IO
%
Switching Frequency Turn-On time (Input to Output)5 IO = 8A; VIN = VIN,nom
-
KHz ms
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Technical Reference Note (APC08)
Electrical Specifications (continued)
OUTPUT SPECIFICATIONS Parameter Efficiency VIN = 6V to 12V IO = 8A Resistive Load (5A for 5Vo; 4A for 6Vo) Device Symbol APC08J08 APC08K08 APC08M08 APC08Y08 APC08G08 APC08F08 APC05A08 APC04S08 All Suffix "W" All All IO/t Min 71 75 77 81 85 87 90 91 Typ 76 81 84 86 90 92 94 95 0.1 1.0 5 500 Max 10 Unit
Dynamic Response: Slew Rate Load Change: 50%-75% IO,max Peak Deviation Settling time to VO,nom Load Change: 50% to 25% IO,max Peak Deviation Settling time to VO,nom Output Voltage Overshoot Passive Resistive Full Load
A/s %VO s %VO s
All All
-
-
5 500
10 -
All
-
-
5
-
%VO
FEATURE SPECIFICATION Parameter Output Voltage Adjustment Range6 Module Parallel Capability10 Power Good7 Open Collector max sink current max pull-up voltage Condition PGLOW 90%VO,SET-MIN > VO > 110%VO,SET-MAX 90%VO,SET-MIN VO 100%VO,SET-MAX Output Enable8 Module ON: Logic High Module OFF: Logic Low Enable source current at Logic Low Device -9 opt -9MA Symbol Min VO 40 Typ Max 3.6 60 Unit V %IO mA V m K
All
PGLOW PGHIGH 0 100
-
5 6 250 -
All All
All All All
> 4.1 0 -
-
14 0.8 60
Vdc Vdc A
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Technical Reference Note (APC08)
Electrical Specifications (continued)
Note: 3. This feature is only for module protection and is not intended for customer application. The value is specified at 25C ambient air temperature. For other ambient air temperature, please refer to thermal derating curve to determine corresponding current-limit inception values. 4. Pulse train with 90 ms period and 1ms pulse width. Average Iout equals about zero. 5. Input to Output Turn-On time is defined as the difference between t1 and t2: where t1 is the time when the input voltage reaches the minimum VIN (VIN = VIN,MIN) and t2 is the time when the output voltage reaches it's specified range (VO = VO,SET-Min). 6. There are two methods applicable to be able to trim the output voltage. Please refer to related sections under Feature Specification. 7. See Figure 6 for PGood configuration 8. Refer to further notes under Feature Specification for the Enable Pin function. 9. Check with factory for higher output capacitance loading. 10. Please refer to "Basic Operation and Features" section on page 11 for additional information on Current sharing. 11. Output ripple is measured with 470F cap termination on the output.
ISOLATION SPECIFICATION - The APC08 series are Non Isolated units.
SAFETY APPROVAL - UL / cUL 60950, and TUV EN60950 - Flammability and temp rise only.
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Technical Reference Note (APC08)
Basic Operation and Features
The APC08 family was designed specifically to address applications where on board distributed power with Point-of-Load Converters (Conversion needed as close to the IC, usually DSP's and ASIC's) is employed. With its wide range input and flexible programmable output, any change in the load becomes very manageable with little to no impact on time to market. All of the converters in this family are buck converters. The APC08x03 versions allow 1.8V to 6V input voltage and the APC08x08 versions allow a 5V to 12V input with 14V max surge. MODULE PIN ASSIGNMENT There are 4 to 7 surface mount pins on a Centauri module. The availability of pins from individual modules is relevant to its version / selected option. PIN # P1 P2 P3 P4 P5 P6 P7 DESIGNATION VIN VO GND TRIM ENABLE PGood P
Input Voltage Output Voltage Common Ground Output Voltage Adjustment [OPTION] Output Voltage Enable Power Good [OPTION] Load Current Active Sharing [OPTION]
INDUSTRY STANDARD PINOUT When ordered with no options, the module comes with only 4 pins - Vin, Gnd, Vout and Enable - and is compatible with other leading manufacturer's footprint. The PGood, Active Current Share, and Trim pins are options that can be ordered with any model number. For the optional trim function add a (-9) to the end of the standard part number. For the optional current share and PGood signal in addition to the trim function, add (-9MA) to the end of the part number. Please refer to the Part Number Ordering Scheme section.
Note: When using the trim function, this module offers much more trim flexibility than the competitive footprint and also requires a jumper between the two footprints to be source compatible. Contact Factory for applications note.
VIN
Current Share
Enable
Trim
GND VO
PGood
Figure 1. Pin Assignment Viewed from Top of Board.
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Technical Reference Note (APC08)
Typical Application Circuit (Standard Pinout)
Recommended C1 is a low ESR (<100 mohms) 100 F tantalum and C2 is a 1 F ceramic or equivalent. Recommended output decoupling capacitor C3 for -W models is 22 F low ESR ceramic capacitor (at a min). For all other models, C3 can go as low as 1 F ceramic capacitor.
Figure 2. Typical Application Circuit.
Enable Pin (Standard configuration)
Pin P5 is functioned to enable the output voltage of a module. If this pin is left open or connected to > 4.1Vdc up to 14Vdc, the module is turned on. On the other hand, if this pin is connected to ground or to a voltage potential from 0 to 0.8Vdc, the module is turned off. The enable pin can source current up to 60A max - suited for typical open-collector transistors readily available in the market. For TTL compatibility, Figure 3 shows a 7405 open collector inverter IC utilized to function the Enable feature. Other common chips that can do the function are 74S05; 74HCT05; non-inverting - 7407; 74S07; 74HC07. If SMT packaging is preferred, Fairchild's Tiny Logic NC7SZ05 or TI's Little Logic SN7SLVC1G06 comes in SOT23 or SC70 packages.
Figure 3. Output Voltage Enable function diagram.
Special Feature Pins (Options): Trim Function (-9):
Pin P4 is used for output voltage adjustment. The output voltage can be trimmed through an external resistor or through an external DC supply as described in the succeeding sections. Method 1: External Trim Resistor. By connecting an external resistor across P4 and P3 (Gnd), the voltage appearing on pin P2 (Vo) is adjusted to a higher value. The output voltage of a module can be adjusted up to a maximum value of 3.3V (nominal) or 83% of the input voltage,
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Technical Reference Note (APC08)
Method 1: External Trim Resistor (continued) whichever is lower. By connecting an external resistor across P4 and P2, Vo is adjusted to a lower value. Only small reductions, 2%, in voltage are recommended, as adjustment to lower voltages tends to affect the loop compensation of the module. Full range adjustment (from 0.9V to 3.6V) can be obtained from a module with the lowest Vo setpoint (0.9Vo). To adjust Vo to a higher value, please refer to Figure 4. The required resistor value (Rt) can be determined through Equation (1) where Vo is the voltage on P2 before the adjustment and Vot is the voltage of P2 after Rt is connected.
Rt =
Vref R1 Vot - Vo
Equation (1) Figure 4. Output Voltage Trim Setup.
Please refer to related constants given in TABLE 1 to calculate the Equation.
APC08X03 APC08X08 Vr / Vref
Version R2 R2 0.87V
0.9V 97.6k 210k
1.2V 8.45k 17.4k
TABLE 1. CONSTANTS 1.5V 1.8V 4.32k 2.94k 9.09k 6.04k
2.5V 1.69k 3.48k
3.3V 1.13k 2.32k
R1 3.09k 6.49k
Be aware that the maximum Vo allowed is 3.6V (for APC08x08 series). Please refer to Centauri datasheet. Example: Module version: APC08J03-9 (1.8 to 6.0Vin, 0.9Vo). Requiring to adjust output voltage from Vo = 0.9V to Vot = 1.8V. Vref = 0.875V and R1 = 3.09k (from TABLE 1). Based on Equation (1), Rt can be determined as 3.0k.
To adjust Vo to a lower value, Rt should be connected between P4 and P2. Equation (2) provides the calculation for Rt.
Rt =
(Vo - Vref )(Vot - Vref ) Vref (Vo - Vot )
R2
Equation (2)
Note: minimum Vo = 0.9V
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Technical Reference Note (APC08)
Method 1: External Trim Resistor (continued) Example Module version: APC08F03-9 (4.0 to 6.Vin, 3.3Vo). Requiring to adjust the output voltage from Vo = 3.3V to Vot = 3.3 (1-0.02) = 3.234V. Vo = 3.3V, Vot = 3.234V, Vref = 0.875V, R2 = 1.13k (from TABLE 1). Based on Equation (1), Rt can be determined as 111.9k.
Trim Function (continued) Method 2: External DC Source By connecting an external DC supply across P4 (Enable) and P3 (GND) through a limiting resistor Rt, (see Figure 5), output voltage adjustment can also be achieved. Equation 3 provides the relationship between the External DC supply, Vt, and Vo (where Vo is the desired output voltage).
Rt Rt Rt Vt = 1 + + Vr - Vo R1 R1 R 2
Equation (3)
Given: Rt = 10k
Figure 5. External DC source for output trim adjust.
Vo Adjustment to Lower Voltages. This method does not limit the recommended lower Vo adjustment to 2% as mentioned on previous sections re: Vo adjustment through external trim resistor. Example: Module version: APC08G03-9 (3V to 6Vin, 2.5Vo). Requiring to adjust the output voltage from Vo = 2.5V to 1.8V Vo = 1.8V, Vr = 0.87V, R1 = 3.09k, R2 = 1.69k (from Table 1). Based on Equation (3), Vt = 3.0V. Example: Module version: APC08G03-9 (3V to 6Vin, 2.5Vo). Requiring to adjust the output voltage from Vo = 2.5V to 0.9V Vo = 0.9V, Vr = 0.87V, R1 = 3.09k, R2 = 1.69k (from Table 1). Based on Equation (3), Vt = 5.9V.
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Technical Reference Note (APC08)
Method 2: External DC Source (continued) Vo Adjustment to Higher Voltages Example: Module version: APC08G03-9 (3V to 6Vin, 2.5Vo). Requiring to adjust the output voltage from Vo = 2.5V to 3.3V Vo = 3.3V, Vr = 0.87V, R1 = 3.09k, R2 = 1.69k (from Table 1). Based on Equation (3), Vt = -1.84V. If application of negative voltage is not desired, the limiting resistor Rt can either be changed to a lower value (Rt = 1k, such that Vt = 0.60V per Equation 3), or use Method 1.
Power Good Signal Operation (Option (-9MA)):
PG pin provides an output signal indicating the Vout is operational (TTL logic signal). It can sink current up to a max of 5mA and can have a maximum external pull-up voltage of 6V. Please see recommended setup shown on Figure 6. For multiple module configurations, the PG pin/signal can be used to drive the Enable signal of the other module for simple sequencing scheme.
Figure 6. PGood setup.
Active Current Share Operation (Option (-9MA)):
Active Current share pin is compatible with APC08 modules only. Connecting this pin directly with the same Pin from another module guarantees current sharing to within 40% to 60% Iout. Note that this pin is not compatible with competitive modules that employ active current sharing. To attain efficient current sharing between like modules, the following points are recommended: a) The modules to be shared should be located as close as possible into the host card. b) The copper tracks that connect Vo and GND should at least be 0.60" in width with at least 2 oz. Cu. c) Due to tolerances of turn-on time characteristics, the initial load current of two APC08 units connected in current sharing configuration should be less than the OCP point of one module. This is to ensure that the first unit that reaches Vo set-point is capable of supplying the load current. This also eliminates the possibility of false triggering the OCP protection. The load current can then be ramped up to the desired loading condition (typical 13A max combined for 2 modules in parallel) after both outputs have stabilized. d) Due to mismatches on the output voltage setpoints of the two converters in parallel, it is recommended to maintain a minimum load current (typical 1.5A) on the output.
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Technical Reference Note (APC08)
Performance Curves - Efficiency
3.3V Efficiency VS Load Current @ Ta = 25 deg C 95 90 EFFICIENCY [%] EFFICIENCY [%] 85 80 75 70 65 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 7.0 8.0 4Vin 5Vin 6Vin 95 90 85 80 75 70 65 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 3Vin 3.3Vin 6Vin 7.0 8.0 2.5V Efficiency VS Load Current @ Ta = 25 deg C
Figure 7. APC08F03 Efficiency Curve.
1V8 Efficiency VS Load Current @ Ta = 25 deg C 95 90 EFFICIENCY [%} EFFICIENCY [%] 85 80 75 70 65 60 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 7.0 8.0 2.2Vin 3.3Vin 6Vin 95 90 85 80 75 70 65 60 0.0
Figure 8. APC08G03 Efficiency Curve.
1.5V Efficiency VS Load Current @ Ta = 25 deg C
1.8Vin 3.3Vin 6Vin 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 7.0 8.0
Figure 9. APC08Y03 Efficiency Curve.
1V2 Efficiency VS Load Current @ Ta = 25 deg C 90 85 EFFICIENCY [%] 80 75 70 65 60 55 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 7.0 8.0 1.8Vin 3.3Vin 6Vin
Figure 10. APC08M03 Efficiency Curve.
0.9V Efficiency VS Load Current @ Ta = 25 deg C 85 80 EFFICIENCY [%] 75 70 65 60 55 50 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 LOAD CURRENT [Amp] 1.8Vin 3.3Vin 6Vin
Figure 11. APC08K03 Efficiency Curve.
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Figure 12. APC08J03 Efficiency Curve.
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Technical Reference Note (APC08)
Performance Curves - Efficiency (continued)
3.3V Efficiency VS Load Current @ Ta = 25 deg C 100 EFFICIENCY [%] EFFICIENCY [%] 90 80 70 60 50 40 30 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 12Vin 6Vin 7.0 8.0 100 90 80 70 60 50 40 30 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 LOAD CURRENT [Amp] 12Vin 6Vin 2.5V Efficiency VS Load Current @ Ta = 25 deg C
Figure 13. APC08F08 Efficiency Curve.
1.8V Efficiency VS Load Current @ Ta = 25 deg C 100 EFFICIENCY [%] EFFICIENCY [%] 90 80 70 60 50 40 30 0.0 1.0 2.0 3.0 4.0 5.0 6.0 LOAD CURRENT [Amp] 12Vin 6Vin 7.0 8.0 90 80 70 60 50 40 30 20
Figure 14. APC08G08 Efficiency Curve.
1.5V Efficiency VS Load Current Ta = 25 deg C
12Vin 6Vin 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
LOAD CURRENT [Amp]
Figure 15. APC08Y08 Efficiency Curve.
1.2V Efficiency VS Load Current @ Ta = 25 deg C 90 EFFICIENCY [%] EFFICIENCY [%] 80 70 60 50 40 30 20 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 LOAD CURRENT [Amp] 12Vin 6Vin 90 80 70 60 50 40 30 20
Figure 16. APC08M08 Efficiency Curve.
0.9V Efficiency VS Load Current @ Ta = 25 deg C
12Vin 6Vin 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
LOAD CURRENT [Amp]
Figure 17. APC08K08 Efficiency Curve.
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Figure 18. APC08J08 Efficiency Curve.
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Technical Reference Note (APC08)
Performance Curves - Thermal Derating Curve
3.3V Derating
9 8 Load Current [Amp] 7 6 5 4 3 2 1 0 25 35 45 55 65 75 85 Ambient Temperature [ C] 0 LFM 400 LFM Load Current [Amp] 9 8 7 6 5 4 3 2 1 0 25 35 45 55 65 75 85 Ambient Temperature [ C] 0 LFM 400 LFM
2.5V Derating
Figure 19. APC08F03 Thermal Derating Curve.
1.8V Derating
9 8
Load Current [Amp] 9 8 7 6 5 4 3 2 1 0
Figure 20. APC08G03 Thermal Derating Curve.
1.5V Derating
Load Current [Amp]
7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [ C] 75 85 0 LFM 400 LFM
0 LFM 400 LFM 25 35 45 55 65 75 85
Ambient Temperature [ C]
Figure 21. APC08Y03 Thermal Derating Curve.
1.2V Derating
9 8 Load Current [Amp]
Load Current [Amp] 9 8 7 6 5 4 3 2 1 0
Figure 22. APC08M03 Thermal Derating Curve.
0.9V Derating
7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [ C] 75 85
0 LFM 400 LFM
0 LFM 400 LFM
25 35 45 55 65 Ambient Temperature [ C] 75 85
Figure 23. APC08K03 Thermal Derating Curve.
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Figure 24. APC08J03 Thermal Derating Curve.
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Technical Reference Note (APC08)
Performance Curve - Thermal Derating (continued)
3.3V Derating
9 8 Load Current [Amp] Load Current [Amp] 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM) 9 8 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM)
2.5V Derating
Figure 25. APC08F08 Thermal Derating Curve.
1.8V Derating
9 8 Load Current [Amp] Load Current [Amp] 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM)
Figure 26. APC08G08 Thermal Derating Curve.
1.5V Derating
9 8 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM)
Figure 27. APC08Y08 Thermal Derating Curve.
1.2V Derating
9 8 Load Current [Amp] Load Current [Amp] 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM)
Figure 28. APC08M08 Thermal Derating Curve.
0.9V Derating
9 8 7 6 5 4 3 2 1 0 25 35 45 55 65 Ambient Temperature [C] 75 85 12Vin (0 LFM) 12Vin (400 LFM) 6Vin (0 LFM) 6Vin (400 LFM)
Figure 29. APC08K08 Thermal Derating Curve.
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Figure 30. APC08J08 Thermal Derating Curve.
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Technical Reference Note (APC08)
Performance Curves
Typical performance curves, TON delay, at 25C ambient temperature; IO = IO,max, VIN = VIN,max. For reference CH1 is connected to +VIN pin, CH2 is connected to the output of the module.
Figure 31. APC08F03 TON delay at VIN,max = 6V.
Figure 32. APC08G03 TON delay at VIN,max = 6V.
Figure 33. APC08Y03 TON delay at VIN,max = 6V.
Figure 34. APC08M03 TON delay at VIN,max = 6V.
Figure 35. APC08K03 TON delay at VIN,max = 6V.
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Figure 36. APC08J03 TON delay at VIN,max = 6V.
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Technical Reference Note (APC08)
Performance Curves (continued)
Figure 37. APC08F08 TON delay at VIN,max = 12V.
Figure 38. APC08G08 TON delay at VIN,max = 12V.
Figure 39. APC08Y08 TON delay at VIN,max = 12V (Ch1)
Figure 40. APC08M08 TON delay at VIN,max = 12V.
Figure 41. APC08K08 TON delay at VIN,max = 12V.
Figure 42. APC08J08 TON delay at VIN,max = 12V.
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Technical Reference Note (APC08)
Young's Stability Curves
GAIN MARGIN
10
1
0.1 Impedance Magnitude ohms
0.01
3 1 . 10
4 1 . 10
5 1 . 10
6 1 . 10
7 1 . 10
100
3 1 . 10
1 . 10 frequency
4
5 1 . 10
6 1 . 10
200
_______0db ______10db ______20db ______30db ______40db ______50db
150
100
50 Phase
0
50
100
150
200 100
3 1 . 10
1 . 10 Frequency
4
5 1 . 10
6 1 . 10
Figure 43. YSC- Gain Margin response to determine system stability at other load condition.
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03
SHEET 18 OF 23
Technical Reference Note (APC08)
Young's Stability Curves
PHASE MARGIN
10
1 Impedance Magnitude ( Ohms )
0.1
0.01
1 .10
3
1 .10
4
100
1 .10
3
1 .10
4
1 .10
5
1 .10
6
50
0 Impedance Phase Angle ( Degrees )
________0 _______15 _______30 _______45 _______60 _______75 _______90
50
100
150
100
1 .10
3
4 1 .10 Frequency
1 .10
5
1 .10
6
Figure 44. YSC - Phase Margin response to determine system stability at other load conditions.
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03
SHEET 19 OF 23
Technical Reference Note (APC08)
Mechanical Specifications
OUTLINE DRAWING
PIND / PIN DIMENSION Nominal Pin Dimension Suggested Pad Dimensions 0.055 X 0.102 [in] 0.070 X 0.110 [in]
Figure 45. Pad Layout outline (in mm).
Parameter Dimension
Device All
Weight
All
Symbol L W H -
Min -
Typ 5 (0.16)
Max 1.300 (33.02) 0.530 (13.46) 0.290 ( 7.36) 10 (0.32)
Unit in (mm) in (mm) in (mm) g (oz)
Typical
Recommended Pick-Up Point
Figure 46. Mechanical Outline (in inches).
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03 SHEET 20 OF 23
Technical Reference Note (APC08)
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 46). 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.
REFLOW NOTES / RECOMMENDATIONS
240
RECOMMENDED REFLOW PROFILE
220 200
1.
2.
3.
Refer to the recommended Reflow Profile per Figure 47. 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 200C - 230C 183C REFLOW ZONE 110C < 80 sec PRE-HEAT ZONE 120 - 180 sec SLOPE < 4C /sec
TEMPERATURE (deg C)
180 160 140 120 100 80 60 40 20 0 0 30 60 90 120 150 180 210 240 270 300
TIME (seconds)
Figure 47. Recommended Reflow Profile.
MODULE MARKINGS / LABELS Marking shall be permanent and legible. Please refer to Figure 48 for the module marking/ label detail.
Note 1 MMM Model No FFF Option Note 2 YYWW Year / Work Week D Day of Week PP nth Panel of the day LL Location in the panel Note 3: Barcode 6 & 7 characters / line Code 128, 32CPI 0.070" Height

APC08MMMFFF YYWWDPPLL
Figure 48. Module Label
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03
SHEET 21 OF 23
Technical Reference Note (APC08)
PACKING AND SHIPPING Standard packaging for the modules will be in tape and reel. Jedec-style tray packaging is also available (add suffix "J" in pn). Please refer to the ordering information. Maximum number of modules in a reel is 300pcs. The tray can hold 33 modules max. Please refer to Figure 49 for the carrier dimensions.
All dimensions are in mm
Figure 49. Tape/ pocket dimensions
Figure 50. Jedec-style tray dimensions in mm.
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03
SHEET 22 OF 23
Technical Reference Note (APC08)
PART NUMBER CODING SCHEME FOR ORDERING
A
P
C
0
8
x
0
y
-
z
x
Output Voltage F = 3.3V G = 2.5V Y = 1.8V Input Voltage Range 3: 1.8V to 6V 8: 5V to 12V
M = 1.5V K = 1.2V J = 0.9V
y z
Options 9: Trim function 9MA: Trim function plus PGood and Current Sharing J: Adding a J suffix indicates Jedec style tray packaging W: Improved Loop Bandwidth (for APC08x03 version only)
Please call 1-888-41-ASTEC for further inquiries or visit us at www.astecpower.com
MODEL: APC08 SERIES OCTOBER 4, 2004 - REVISION 03
SHEET 23 OF 23

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