ATH30T033

ATH30T033 ASTEC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 16

Technical content

Features

• Up to 30-A Output Current
• 3.3-V Input Voltage
• Wide-Output Voltage Adjust (0.8 V to 2.5 V)
• 135 W/in³ Power Density
• Efficiencies up to 93 %
• On/Off Inhibit
• Pre-Bias Startup
• Margin Up/Down Controls
• Under-Voltage Lockout ATH30T033 Series —3.3-V Input 30-A, 3.3-V I nput Non-Isolated Wide-Output Adjust Power Module Rset = Required to set the desired output voltage higher than 0.8 V (see spec. table for values). Cin = Required 1,500 µF capacitor. Cout = Optional 330 µF capacitor.
• Auto-T rack™ Sequencing
• Output Over-Current Protection (Non-Latching, Auto-Reset)
• Operating T emp: –40 to +85 °C
• Over-T emperature Shutdown
• Safety Agency Approvals: UL 1950, CSA 22.2 950, EN60950 VDE (Pending)
• Point-of-Load Alliance (POLA) Compatible REVISION 00 (30APR2004)

Description

The ATH30T033 is a series of high- current non-isolated power modules. The product is characterized by high effi- ciencies, and up to 30 A of output current, while occupying a mere 1.64 in² of PCB area. In terms of cost, size, and perfor- mance, the series provides OEM’s with a flexible module that meets the require- ments of the most complex and demanding mixed-signal applications. These include the most densly populated, multi-proces- sor systems that incorporate high-speed DSP’s, microprocessors, and ASICs. The series uses double-sided surface mount construction and provides high- performance step-down power conversion from a 3.3-V input bus voltage. The out- put voltage of the ATH30T033 can be set to any value over the range 0.8 V to 2.5 V , using a single resistor. This series includes Auto-T rack™. Auto-T rack simplifies power-up and power-down supply voltage sequencing in a system by enabling modules to track each other, or any other external voltage. Each model also includes an on/off inhibit, output voltage adjust (trim), and margin up/down controls. An output voltage sense ensures tight load regulation, and an output over-current and thermal shutdown feature provide for protection against external load faults. Package options inlude both through- hole and surface mount configurations. Auto-Track™ Sequencing Pin Configuration Pin Function

1 GND

3 GND

4 Inhibit *

7 GND

10 GND

11 T rack

12 Margin Down *

13 Margin Up *

• Denotes negative logic: Open = Normal operation Ground = Function active NOMINAL SIZE = 1.37 in x 1.12 in (34,8 mm x 28,5 mm) PTH03030W (Top View) Margin Up Margin Down VIN L O A DC IN 1,500 µF (Required) + C OUT 330 µF (Optional) Inhibit GND GND VOUT Vo Sense Track 13 12 11 654 R SET 0.5 %, 0.1 W (Required) ATH30T033-9S

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Pin Descriptions Vin: The positive input voltage power node to the module, which is referenced to common GND. Vout: The regulated positive power output with respect to the GND node. GND: This is the common ground connection for the Vin and V out power connections. It is also the 0 VDC reference for the control inputs. Inhibit: The Inhibit pin is an open-collector/drain negative logic input that is referenced to GND. Applying a low- level ground signal to this input disables the module’ s output and turns off the output voltage. When the Inhibit control is active, the input current drawn by the regula- tor is significantly reduced. If the Inhibit pin is left open-circuit, the module will produce an output when- ever a valid input source is applied. Vo Adjust: A 0.1 W 1 % resistor must be directly connected between this pin and pin 7 (GND) to set the output voltage to a value higher than 0.8 V . The temperature stability of the resistor should be 100 ppm/°C (or better). The set point range for the output voltage is from 0.8 V to 2.5 V. The resistor value required for a given output voltage may be calculated from the following formula. If left open circuit, the output voltage will default to its lowest value. For further information on output voltage adjust- ment consult the related application note. Rset = 10 k · 0.8 V – 2.49 k Vout – 0.8 V The specification table gives the preferred resistor values for a number of standard output voltages. Vo Sense: The sense input allows the regulation circuit to compensate for voltage drop between the module and the load. For optimal voltage accuracy V o Sense should be connected to V out. It can also be left disconnected. Track: This is an analog control input that enables the output voltage to follow an external voltage. This pin becomes active typically 20 ms after the input voltage has been applied, and allows direct control of the output voltage from 0 V up to the nominal set-point voltage. Within this range the output will follow the voltage at the Track pin on a volt-for-volt basis. When the control voltage is raised above this range, the module regulates at its set-point voltage. The feature allows the output voltage to rise simultaneously with other modules pow- ered from the same input bus. If unused, this input should be connected to V in. Note: Due to the under-voltage lockout feature, the output of the module cannot follow its own input voltage during power up. For more information, consult the related application note. Margin Down: When this input is asserted to GND, the output voltage is de creased by 5% from the nominal. The input requires an open-collector (open-drain) interface. It is not TTL compatible. A lower percent change can be accomodated with a series resistor. For further infor- mation, consult the related application note. Margin Up: When this input is asserted to GND, the output voltage is increased by 5%. The input requires an open-collector (open-drain) interface. It is not TTL compatible. The percent change can be reduced with a series resistor. For further information, consult the related application note. ATH30T033 Series —3.3-V Input 30-A, 3.3-V I nput Non-Isolated Wide-Output Adjust Power Module REVISION 00 (30APR2004)

Ordering Information

Input Voltage Output Voltage Output Current Model Number 2.95V to 3.65V 0.8V 1 to 2.5V 30A ATH30T033-9(S)(J) Options: “-J” - Through-hole T ermination, T ray Packaging “-SJ” - SMT T ermination, T ray Packaging Notes: 1Preset output voltage is 0.8V; externally adjustable to 2.5V through the Vo,Adjust pin

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Environmental & Absolute Maximum Ratings (Voltages are with respect to GND) Characteristics Symbols Conditions Min Typ Max Units T rack Input Voltage V track –0.3 — V in + 0.3 V Operating T emperature Range T a Over Vin Range –40 — 85 °C Solder Reflow T emperature T reflow Surface temperature of module body or pins 235 (i) °C Storage T emperature T s — –40 — 125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 — 500 — G’s1 msec, ½ Sine, mounted Mechanical Vibration Mil-STD-883D, Method 2007.2 Suffix S — 10 — G’s20-2000 Hz Suffix H — 20 — Weight — — 10 — grams Flammability — Meets UL 94V-O Notes: (i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the st ated maximum. ATH30T033 Series —3.3-V Input 30-A, 3.3-V I nput Non-Isolated Wide-Output Adjust Power Module REVISION 00 (30APR2004) Specifications (Unless otherwise stated, Ta =25 °C, Vin =3.3 V , Vout =2 V , Cin =1,500 µF , Cout =0 µF, and Io =Iomax) ATH30T033 Characteristics Symbols Conditions Min Typ Max Units Output Current I o 60 °C, 200 LFM airflow 0 — 30 (1) A25 °C, natural convection 0 — 30 (1) Input Voltage Range V in Over Io range 2.95 (2) — 3.65 V Set-Point Voltage T olerance V o tol — — ±2 (3) %Vo T emperature Variation ∆Regtemp –40 °C <Ta < +85 °C — ±0.5 — %V o Line Regulation ∆Regline Over Vin range — ±10 — mV Load Regulation ∆Regload Over Io range — ±12 — mV T otal Output Variation ∆Regtot Includes set-point, line, load, — — ±3 (3) %Vo–40 °C ≤ Ta ≤ +85 °C Efficiency η Io =20 A R SET = 2.21 kΩ Vo = 2.5 V — 93 — RSET = 4.12 kΩ Vo = 2.0 V — 92 — RSET = 5.49 kΩ Vo = 1.8 V — 91 — % RSET = 8.87 kΩ Vo = 1.5 V — 89 — RSET = 17.4 kΩ Vo = 1.2 V — 87 — RSET = 36.5 kΩ Vo = 1.0 V — 85 — Vo Ripple (pk-pk) V r 20 MHz bandwidth — 30 — mVpp Over-Current Threshold I o trip Reset, followed by auto-recovery — 45 — A T ransient Response 1 A/µs load step, 50 to 100 % I omax, Cout =330 µF ttr Recovery Time — 70 — µSec ∆Vtr Vo over/undershoot — 100 — mV Margin Up/Down Adjust V o adj — ± 5 — % Margin Input Current (pins 12 /13) I IL margin Pin to GND — – 8 (4) —µ A T rack Input Current (pin 8) I IL track Pin to GND — — –130 (5) µA T rack Slew Rate Capability dV track/dt C out ≤ Cout(max) — — 1 V/ms Under-Voltage Lockout UVLO V in increasing — 2.45 2.8 VVin decreasing 2.2 2.4 — Inhibit Control (pin4) R eferenced to GND Input High Voltage V IH Vin –0.5 — Open (5) V Input Low Voltage VIL –0.2 — 0.8 Input Low Current IIL inhibit Pin to GND — –130 — µA Input Standby Current I in inh Inhibit (pin 4) to GND, T rack (pin 11) open — 10 — mA Switching Frequency ƒ s Over Vin and Io ranges 275 300 325 kHz External Input Capacitance C in 1,500 (6) —— µ F External Output Capacitance C out Capacitance value non-ceramic 0 330 (7) 16,500 (8) µF ceramic 0 — 300 Equiv. series resistance (non-ceramic) 4 (9) —— m Ω Reliability MTBF Per Bellcore TR-332 2.8 — — 10 6 Hrs50 % stress, Ta =40 °C, ground benign Notes: (1) See SOA curves or consult factory for appropriate derating. (2) The minimum input voltage is equal to 2.95 V or V out + 0.5 V , whichever is greater. (3) The set-point voltage tolerance is affected by the tolerance and stability of R SET. The stated limit is unconditionally met if R SET has a tolerance of 1 % with 100 ppm/°C or better temperature stability. (4) A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc. (5) This control pin has an internal pull-up to the input voltage Vin. If it is left open-circuit the module will operate when i nput power is applied. A small low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note. (6) A 1,500 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 900 m A rms of ripple current. (7) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response. (8) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance. (9) This is the typical ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m Ω as the minimum when using max-ESR values to calculate.

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures. Derating limits apply to modules soldered directly to a 4 in. × 4 in. double-sided PCB with 1 oz. copper. Typical Characteristics Characteristic Data; Vin =3.3V (See Note A) Efficiency vs Load Current Power Dissipation vs Load Current Output Ripple vs Load Current Safe Operating Area; Vin =3.3 V (See Note B) All Output Voltages 0 5 10 15 20 25 30 Iout - Amps Pd - Watts 0 5 10 15 20 25 30 Iout (A) Ambient Temperature (°C) 400LFM 200LFM 100LFM Nat Conv Airflow ATH30T033 Series —3.3-V Input 30-A, 3.3-V I nput Non-Isolated Wide-Output Adjust Power Module REVISION 00 (30APR2004) 100 0 5 10 15 20 25 30 Iout - Amps Efficiency - % 2.5 V 2.0 V 1.8 V 1.5 V 1.2 V 0.8 V VOUT 0 5 10 15 20 25 30 Iout (A) Ripple - mV 2.0 V 1.5 V 1.8 V 1.2 V 0.8 V 2.5 V VOUT

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 ATH30T033 & ATH30T05 Series Capacitor Recommendations for the ATH30T033 & ATH30T05 Series of Power Modules Input Capacitor The recommended input capacitor(s) is determined by the 1,500 µF (1) minimum capacitance and 900 mArms minimum ripple current rating. Ripple current and <100 m Ω equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capacitors. Unlike polymer tantalum, conventional tan- talum capacitors have a recommended minimum voltage rating of 2 × (maximum DC voltage + AC ripple). This is standard practice to ensure reliability. For improved ripple reduction on the input bus, ceramic capacitors may be used to complement electrolytic types and achieve the minimum required capacitance. Output Capacitors (Optional) For applications with load transients (sudden changes in load current), regulator response will benefit from an external output capacitance. The recommended output capacitance of 330 µF will allow the module to meet its transient response specification (see product data sheet). For most applications, a high quality computer-grade aluminum electrolytic capacitor is most suitable. These capacitors provide adequate decoupling over the frequency range, 2 kHz to 150 kHz, and are suitable when ambient temperatures are above 0 °C. For operation below 0 °C, tantalum, ceramic or Os-Con type capacitors are recom- mended. When using one or more non-ceramic capacitors, the calculated equivalent ESR should be no lower than 4 mΩ (7 mΩ using the manufacturer’ s maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in T able 1-1. Ceramic Capacitors Above 150 kHz the performance of aluminum electrolytic capacitors becomes less effective. T o fur ther improve the reflected input ripple current or the output transient response, multilayer ceramic capacitors can also be added. Ceramic capacitors have very low ESR and their resonant frequency is higher than the bandwidth of the regulator. When used on the output their combined ESR is not critical as long as the total value of ceramic capacitance does not exceed 300 µF . Also, to prevent the formation of local resonances, do not place more than five identical ce- ramic capacitors in parallel with values of 10 µF or greater. Tantalum Capacitors T antalum type capacitors can be used at both the input and output, and are recommended for applications where the ambient operating temperature can be less than 0 °C. The AVX TPS, Sprague 593D/594/595 and Kemet T495/ T510 capacitor series are suggested over many other tantalum types due to their higher rated surge, power dissipation, and ripple curr ent capability. As a caution many general purpose tantalum capacitors have consider- ably higher ESR, reduced power dissipation and lower ripple current capability. These capacitors are also less reliable when determining their power dissipation and surge current capability. T antalum capacitors that do not have a stated ESR or surge current rating are not recommended for power applications. When specifying Os-Con and polymer tantalum capacitors for the output, the minimum ESR limit will be encoun- tered well before the maximum capacitance value is reached. Capacitor Table T able 1-1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The recommended number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (at 100kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. Designing for Very Fast Load Transients The transient response of the DC/DC converter has been characterized using a load transient with a di/dt of 1 A/µs. The typical voltage deviation for this load transient is given in the data sheet specification table using the optional value of output capacitance. As the di/dt of a transient is increased, the response of a converter’s regu- lation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation with any DC/DC converter once the speed of the transient exceeds its bandwidth capability. If the target application specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output capacitor decoupling. In these cases special attention must be paid to the type, value and ESR of the capacitors selected. If the transient performance requirements exceed that specified in the data sheet, or the total amo unt of load capacitance is above 3,000 µF , the selection of output capacitors becomes more important. For further guidance consult the separate application note, “ Selecting Capaci- tors for PTH Products in High-Performance Applications. ”

Application Notes continued North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Table 1-1: Input/Output Capacitors [1] The total capacitance is slightly lower than 1,500 µF , but is acceptable based on the combined ripple current rating. [2] A ceramic capacitor may be used to complement electrolytic types at the input to further reduce high-frequency ripple curren t ATH30T033 & ATH30T05 Series :epyT,rodneVroticapaC )elytS(seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV eulaV )Fµ( RSE.xaM zHk001ta elppiR.xaM C°58@tnerruC )smrI( eziSlacisyhP )mm( tupnI suB tuptuO suB rebmuNtraProdneV :cinosanaP )laidaR(CF KF) DMS( V01 V61 V61 V01 065 0051 0051 0022 090.0 Ω 340.0 Ω 060.0 Ω 060.0 Ω Am009> Am0961 Am0011 Am0011 01 × 5.21 61 × 51 5.21 × 5.31 5.21 × 5.31 165A1CFUEE S251C1CFUEE Q251C1KFVEE Q222A1KFVEE noc-imehCdetinU )laidaR(nocsO,XF ).DMS(munimulA-yloP(,AXP )laidaR(munimulA,ZXL V3.6 V3.6 V01 V01 0001 028 086 0001 310.0 Ω 010.0 Ω 090.0 Ω 860.0 Ω Am5394 Am0055 Am009> Am0501 01 × 5.01 01 × 2.21 01 × 5.21 01 × 61 M0001XF6 PT21JM028CV3.6AXP LL21X01M186BV01ZXL LL61X01M201BV01ZXL ,nocihciN: munimulA )laidaR(DH )laidaR(MP V3.6 V01 0001 0051 350.0 Ω 050.0 Ω Am0301 Am0601 01 × 5.21 61 × 51 RPM201J0DHU 6HHM251A1MPU :noc-sO,oynaS )laidaR(PS )DMS(PVS V01 V3.6 074 028 510.0 Ω 210.0 Ω Am0054> Am0445> 01 × 5.01 01 × 7.21 ]1[ M074PS01 M028PVS6 :munimulA-yloP,cinosanaP )DMS(AW )DMS(ES/S V3.6 V3.6 065 081 020.0 Ω 500.0 Ω Am0015 Am0004 01 × 2.01 3.7 × 3.4 × 2.4 R/N P165J0AWFEE R181J0ESFEE :mulatnaT,XVA )DMS(SPTV 01 V01 074 074 540.0 Ω 060.0 Ω Am3271 Am6281 L3.7 × W7.5 × H1.4 3 ]1[ 3 ]1[ 5400R010M774ESPT 0600R010M774VSPT :)DMS(temeK tnaT-yloP,025T cinagrO/tnaT-yloP,035T V3.6 V01 V3.6 074 033 074 810.0 Ω 510.0 Ω 210.0 Ω Am0021> Am0083> Am0024 W3.4 × L3.7 × H0.4 3 ]1[ 3 ]1[ 810ES600M774X025T SA010M733X035T SA600M774X035T eugarpS-yahsiV )DMS(mulatnaT,D595 )laidaR(noc-sO,AS49 V01 V61 074 0022 001.0 Ω 510.0 Ω Am0441 Am0479 L2.7 × W6 × H1.4 61 × 52 3 ]1[ T2R0100X774D595 PBH6100X801AS49 )DMS(R5XcimareC,temeKV 61 V3.6 200.0 Ω 200.0 Ω —e sac0121 mm5223 1 ]2[ 1 ]2[ CAP4M601C0121C CAP9K674C0121C cimareC,ataruMR 5X) DMS(V 3.6 V3.6 V61 V61 001 200.0 Ω —e sac0121 mm5223 1 ]2[ 1 ]2[ 1 ]2[ M701J06RE23MRG M674J06RE23MRG K622C16RE23MRG K601C16RD23MRG cimareC,KDTR 5X) DMS(V 3.6 V3.6 V61 V61 001 200.0 Ω —e sac0121 mm5223 1 ]2[ 1 ]2[ 1 ]2[ TM701J0R5X5223C TM674J0R5X5223C TM622C1R5X5223C TM601C1R5X5223C

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Adjusting the Output Voltage of the ATH30T033 & ATH30T05 Wide-Output Adjust Power Modules The Vo Adjust control (pin 4) sets the output voltage of the ATH30T033 and ATH30T05 products to a value higher than 0.8 V . The adjustment range of the ATH30T033 (3.3-V input) is from 0.8 V to 2.5 V 1, and the ATH30T05 (5-V input) from 0.8 V to 3.6 V . For an output voltage other than

0.8 V a single external resistor, Rset, must be connected

directly between the Vo Adjust and GND pins 2. T able 2-1 gives the preferred value of the external resistor for a num- ber of standard voltages, along with the actual output voltage that this resistance value provides. For other output voltages the value of the required resistor can either be calculated using the following formula, or simply selected from the range of values given in T able 2-2. Figure 2-1 shows the placement of the required resistor. Rset = 10 kΩ · 0.8 V – 2.49 kΩVout – 0.8 V Figure 2-1; Vo Adjust Resistor Placement Notes: 1. Modules that operate from a 3.3-V input bus should not be adjusted higher than 2.5 V . 2. Use a 0.1 W resistor. The tolerance should be 1 %, with temperature stability of 100 ppm/°C (or better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 5 and 10 using dedicated PCB traces. 3. Never connect capacitors from V o Adjust to either GND or Vout. Any capacitance added to the Vo Adjust pin will affect the stability of the regulator.

0.800 Open

0.825 318 k Ω 0.850 158 k Ω 0.875 104 k Ω 0.900 77.5 k Ω 0.925 61.5 k Ω 0.950 50.8 k Ω 0.975 43.2 k Ω 1.000 37.5 k Ω 1.025 33.1 k Ω 1.050 29.5 k Ω 1.075 26.6 k Ω 1.100 24.2 k Ω 1.125 22.1 k Ω 1.150 20.4 k Ω 1.175 18.8 k Ω 1.200 17.5 k Ω 1.225 16.3 k Ω 1.250 15.3 k Ω 1.275 14.4 k Ω 1.300 13.5 k Ω 1.325 12.7 k Ω 1.350 12.1 k Ω 1.375 11.4 k Ω 1.400 10.8 k Ω 1.425 10.3 k Ω 1.450 9.82 k Ω 1.475 9.36 k Ω 1.50 8.94 k Ω 1.55 8.18 k Ω 1.60 7.51 k Ω 1.65 6.92 k Ω 1.70 6.4 k Ω 1.75 5.93 k Ω 1.80 5.51 k Ω 1.85 5.13 k Ω 1.90 4.78 k Ω 1.95 4.47 k Ω Vout (Standard) R set (Pref’d Value) V out (Actual) 3.3 V 1 698 Ω 3.309V 2.5 V 2.21 k Ω 2.502 V 2 V 4.12 k Ω 2.010 V 1.8 V 5.49 k Ω 1.803 V 1.5 V 8.87 k Ω 1.504 V 1.2 V 17.4 k Ω 1.202 V 1 V 36.5 k Ω 1.005 V 0.8 V Open 0.8 V Table 2-1; Preferred Values of R set for Standard Output Voltages ATH30T033 & ATH30T05 Series Table 2-2; Output Voltage Set-Point Resistor Values Va Req’d R set Va Req’d R set 2.00 4.18 k Ω 2.05 3.91 k Ω 2.10 3.66 k Ω 2.15 3.44 k Ω 2.20 3.22 k Ω 2.25 3.03 k Ω 2.30 2.84 k Ω 2.35 2.67 k Ω 2.40 2.51 k Ω 2.45 2.36 k Ω 2.50 2.22 k Ω 2.55 2.08 k Ω 2.60 1.95 k Ω 2.65 1.83 k Ω 2.70 1.72 k Ω 2.75 1.61 k Ω 2.80 1.51 k Ω 2.85 1.41 k Ω 2.90 1.32 k Ω 2.95 1.23 k Ω 3.00 1.15 k Ω 3.05 1.07 k Ω 3.10 988 Ω 3.15 914 Ω 3.20 843 Ω 3.25 775 Ω 3.30 710 Ω 3.35 647 Ω 3.40 587 Ω 3.45 529 Ω 3.50 473 Ω 3.55 419 Ω 3.60 367 Ω C OUT 330 µF (Optional) GND VOUT Vo Sense R SET 1 %, 0.1 W PTH05030W 1, 3, 7 13 6 8, 9 12 11 GND Adjust VO Sense GND GND ATH30T05-9S

ATH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Features of the ATH Family of Non-Isolated Wide Output Adjust Power Modules Point-of-Load Alliance The ATH family of non-isolated, wide-output adjust power modules are optimized for applications that require a flexible, high performance module that is small in size. These products are part of the “Point-of-Load Alliance” (POLA), which ensures compatible footprint, interoperability and true second sourcing for cust omer design flexibility. The POLA is a collaboration between T exas Instruments, Artesyn T echnologies, and Astec Power to offer customers advanced non-isolated modules that provide the same functionality and form factor. Prod- uct series covered by the alliance includes the ATH06 (6 A), ATH10 (10 A), ATH12/15 (12/15 A), ATH18/22 (18/22 A), and the ATH26/30 (26/30 A). From the basic, “Just Plug it In” functionality of the 6-A modules, to the 30-A rated feature-rich ATH30, these products were designed to be very flexible, yet simple to use. The features vary with each product. T able 3-1 provides a quick reference to the available features by product and input bus voltage. Table 3-1; Operating Features by Series and Input Bus Voltage For simple point-of-use applications, the ATH06 provides operating features such as an on/off inhibit, output volt- age trim, pre-bias startup (3.3/5-V input only), and over-current protection. The ATH10 (10 A), and ATH12/ 15 (12/15 A) include an output voltage sense, and margin up/down controls. Then the higher output current, ATH18/22 and ATH26/30 products incorporate over-tem- perature shutdown protection. All of the products referenced in T able 3-1 include Auto-T rack™. This is a feature unique to the ATH family, and was specifically designed to simplify the task of sequencing the supply voltage in a power system. These and other features are described in the following sections. Soft-Start Power Up The Auto-T rack™ feature allows the power-up of multiple ATH modules to be directly controlled from the Track pin. However in a stand-alone configuration, or when the Auto-T rack™ feature is not being used, the Track pin should be directly connected to the input voltage, V in (see Figure 3-1). Figure 3–1 5 V C IN 1,000 µF C OUT 330 µF GND GND 3.3 V R SET , 698

0.1 W, 1 %

When the Track pin is connected to the input voltage the Auto-T rack™ function is permanently disengaged. This allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate. Figure 3–2 Vin (1 V/Div) Vout (1 V/Div) Iin (5 A/Div) HORIZ SCALE: 5 ms/Div Series Input Bus I OUT

12 V 6 A  

Adjust (Trim) Thermal Shutdown Pre-Bias Startup Margin Up/Down Auto-Track™ PTHxx030 On/Off Inhibit PTHxx010 PTHxx020 PTHxx060 PTHxx050ATH06 ATH10 ATH12/15 ATH18/22 ATH26/30 10 A ATH22T05-9S

ATH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Figure 3–6; Simultaneous Power Up with Auto-Track™ Control PTH05010W Track VIN VO GNDInhibit PTH05020W Track VIN VO GNDInhibit

7 COUT

Vo2 =1.8 V Vo1 =3.3 V +5 V 0 V On/Off Control 1 = Power Down 0 = Power Up BSS138 0.1 µF 100 k R 2 698 R 3 5k49 Figure 3–5; Sequenced Power Up & Power Down Using Auto-Track Figure 3–7; Simultaneous Power Down with Auto-Track™ Control Vo1 (1 V/Div) Vo2 (1 V/Div) On/Off Input (5 V/Div) HORIZ SCALE: 10 ms/Div Vo1 (1 V/Div) Vo2 (1 V/Div) On/Off Input (5 V/Div) HORIZ SCALE: 10 ms/Div ATH22T05-9S ATH15T05-9S

ATH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Margin Up/Down Controls The ATH10 (10A), ATH12/15 (12/15A), ATH18/22 (18/ 22A) and ATH26/30 (26/30A) products incorporate Margin Up and Margin Down control inputs. These controls allow the output voltage to be momentarily adjusted 1, either up or down, by a nominal 5 %. This provides a convenient method for dynamically testing the operation of the load circuit over its supply margin or range. It can also be used to verify the function of supply voltage supervisors. The ±5 % change is applied to the adjusted output voltage, as set by the external resistor, Rset at the Vo Adjust pin. The 5 % adjustment is made by pulling the appropriate margin control input directly to the GND terminal 2. A low-leakage open-drain device, such as an n-channel MOSFET or p-channel JFET is recommended for this purpose 3. Adjustments of less than 5 % can also be accom- modated by adding series resistors to the control inputs. The value of the resistor can be selected from T able 3-2, or calculated using the following formula. Up/Down Adjust Resistance Calculation T o reduce the margin adjustment to something less than 5 %, series resistors are required (See R D and R U in Figure 3-8). For the same amount of adjustment, the resistor value calculated for R U and R D will be the same. The formulas is as follows. RU or RD = 499 – 99.8 k Ω ∆% Where ∆ % = The desired amount of margin adjust in percent. Notes: 1. The Margin Up* and Margin Dn* controls were not intended to be activated simultaneously. If they are their affects on the output voltage may not completely cancel, resulting in the possibility of a slightly higher error in the output voltage set point. 2. The ground reference should be a direct connection to the module GND at pin 7 (pin 1 for the ATH06). This will produce a more accurate adjustment at the load circuit terminals. The transistors Q 1 and Q2 should be located close to the regulator. 3. The Margin Up and Margin Dn control inputs are not compatible with devices that source voltage. This includes TTL logic. These are analog inputs and should only be controlled with a true open-drain device (preferably a discrete MOSFET transistor). The device selected should have low off-state leakage current. Each input sources 8 µA when grounded, and has an open-circuit voltage of 0.8 V . Figure 3–8; Margin Up/Down Application Schematic Table 3-2; Margin Up/Down Resistor Values % Adjust R U / RD 5 0.0 k Ω 4 24.9 k Ω 3 66.5 k Ω 2 150.0 k Ω 1 397.0 k Ω C out +C in VIN GND MargDn L O A D Q 2 +V OUT Q 1 MargUp +Vo RD RU PTH05010W (Top View) 10 9 8 543 GND R SET

ATH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Pre-Bias Startup Capability Only selected products in the ATH family incorporate this capability. Consult T able 3-1 to identify which products are compliant. A pre-bias startup condition occurs as a result of an external voltage being present at the output of a power module prior to its output becoming active. This often occurs in com- plex digital systems when current from another power source is backfed through a dual-supply logic component, such as an FPGA or ASIC. Another path might be via clamp diodes as part of a dual-supply power-up sequencing arrangement. A prebias can cause problems with power modules that incorporate synchronous rectifiers. This is because under most operating conditions, these types of modules can sink as well as source output current. The ATH family of power modules incorporate synchro- nous rectifiers, but will not sink current during startup or whenever the Inhibit pin is held low. However, to ensure satisfactory operation of this function, certain conditions must be maintained.

2 Figure 3-9 shows an application

demonstrating the pre-bias startup capability. The start- up waveforms are shown in Figure 3-10. Note that the output current from the ATH15T033 (I o) shows negligible current until its output voltage rises above that backfed through diodes D1 and D2. Note: The pre-bias start-up feature is not compatible with Auto-Track™. When the module is under Auto-Track™ control, it will sink current if the output voltage is below that of a back-feeding source. To ensure a pre- bias hold-off one of two approaches must be followed when input power is applied to the module. The Auto-Track™ function must either be disabled 3, or the module’s output held off (for at least 50 ms) using the Inhibit pin. Either approach ensures that the Track pin voltage is above the set-point voltage at start up. Notes 1. Startup includes the short delay (approx. 10 ms) prior to the output v oltage rising, followed by the rise of the output voltage under the module’s internal soft-start control. Startup is complete when the output voltage has risen to either the set- point voltage or the voltage at the Track pin, whichever is lowest. 2. T o ensure that the regulator does not sink current when power is first applied (e ven with a ground signal applied to the Inhibit control pin), the input voltage must always be greater than the output voltage throughout the power-up and power-down sequence. 3. The Auto-T rack™ function can be disabled at power up by immediately applying a voltage to the module’s Track pin that is greater than its set-point voltage. This can be easily accomplished by connecting the Track pin to V in. Vo = 2.5 V VIN = 3.3 V 2k21 ASIC VCORE VCCIO Io PTH03010W Track VIN VO GNDInhibit Vadj Sense C IN 330 µF + C OUT 330 µF Figure 3–9; Application Circuit Demonstrating Pre-Bias Startup Vin (1 V/Div) Vo (1 V/Div) Io (5 A/Div) HORIZ SCALE: 5 ms/Div ATH15T033-9S Figure 3–10; Pre-Bias Startup Waveforms

ATH Series of Wide-Output Adjust Power Modules (3.3/5-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Remote Sense The ATH10, ATH12/15, ATH18/22, and ATH26/30 products incorporate an output voltage sense pin, Vo Sense. The Vo Sense pin should be connected to Vout at the load circuit (see data sheet standard application). A re- mote sense improves the load regulation performance of the module by allowing it to compensate for any ‘IR’ voltage drop between itself and the load. An IR drop is caused by the high output current flowing through the small amount of pin and trace resistance. Use of the remote sense is optional. If not used, the V o Sense pin can be left open-circuit. An internal low-value resistor (15- Ω or less) is connected between the Vo Sense and Vout. This en- sures the output voltage remains in regulation. With the sense pin connected, the difference between the voltage measured directly between the Vout and GND pins, and that measured from Vo Sense to GND, is the amount of IR drop being compensated by the regulator. This should be limited to a maximum of 0.3 V . Note: The remote sense feature is not designed to compensate for the forward drop of non-linear or frequency dependent components that may be placed in series with the converter output. Examples include OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the remote sense connection they are effectively placed inside the regulation control loop, which can adversely affect the stability of the regulator.