ATH10K12

ATH10K12 ASTEC | Alldatasheet

Document overview

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Technical content

Features

• Up to 10-A Output Current
• 12-V Input Voltage
• Wide-Output Voltage Adjust (1.2 V to 5.5 V)
• Efficiencies up to 95 %
• 225 W/in³ Power Density
• On/Off Inhibit
• Output Voltage Sense
• Margin Up/Down Controls
• Under-Voltage Lockout
• Auto-T rack™ Sequencing
• Output Over-Current Protection (Non-Latching, Auto-Reset)
• Operating T emp: –40 to +85 °C
• IPC Lead Free 2
• Safety Agency Approvals (Pending) UL 1950, CSA 22.2 950, & EN60950
• Point-of-Load Alliance (POLA) Compatible Auto-Track™ Sequencing Pin Configuration Pin Function

1 GND

3 Inhibit *

7 GND

8 T rack

9 Margin Down *

10 Margin Up *

• Denotes negative logic: Open = Normal operation Ground = Function active NOMINAL SIZE = 1 in x 0.62 in (25,4 mm x 15,75 mm) ATH10K12 Series —12-V Input Margin Up Margin Down VIN L O A D C IN 560 µF (Required) + Co 1 330 µF (Optional) Inhibit GND GND VOUT Vo Sense Track R SET 1 %, 0.1 W (Required) PTH12060W (Top View) 10 9 8 543 Co 2 10 µF Ceramic (Optionable)

Description

The ATH10K12 series is a non- isolated power module, and part of a new class of complete DC/DC converters from T exas Instruments. These modules are small in size, and a feature-rich alter- native for applications requiring up to 10 A of load current. Its small footprint, (1 in × 0.62 in) and industry leading features makes this mod- ule suitable for space conscious digital systems that incorporate multiple pro- cessors. The ATH10K12 module operates from a 12-V input bus voltage to provide step-down power conversion to any out- put voltage over the range, 1.2 V to 5.5 V. The output voltage is set using a single resistor. This product includes Auto-T rack™ Sequencing. Auto-T rack greatly simplifies the task of supply voltage sequencing in a power system, by enabling modules to track each other, or any other external voltage, during power up and power down. Other features include an on/off inhibit and margin up/down controls. An output voltage sense ensures tight load regulation. A non-latching over-current trip protects against load faults. T arget applications are complex digital systems that incorporate the industry’s latest high-speed DSPs, ASICs, FPGAs, micro-processors, and bus drivers. Rset = Required to set the output voltage to a value higher than 1.2 V. (See specification table for values) Cin = Required 560 µF capacitor Cout = Optional 330 µF capacitor ATH10K12-9S REVISION 00 (4DEC2003)

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 mod- ule, 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 1 % 0.1 W resistor must be directly connected between this pin and pin 7 ( GND) to set output voltage to a value higher than 1.2 V . The temperature stability of the resistor should be 100 ppm/°C or better. The set point range is from 1.2 V to 5.5 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 infor- mation on output voltage adjustment consult the related application note. Rset = 10 kΩ · 0.8 V – 1.82 kΩ Vout – 1.2 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 Vo 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, the input may be left unconnected. Note: Due to the under-voltage lockout, this feature does not allow the output from the module to 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.

Ordering Information

10-A, 12-V I nput Non-Isolated Wide-Output Adjust Power Module ATH10K12 Series —12-V Input REVISION 00 (4DEC2003) Input Voltage Output Voltage Output Current Model Number 10.8V to 13.2V 1.2V 1 to 5.5V 10A ATH10K12-9(S)(J) Options: “-J” - Through-hole T ermination, T ray Packaging “-SJ” - SMT T ermination, T ray Packaging “-S” - SMT T ermination, T&R Packaging Notes: 1Preset output voltage is 1.2V; externally adjustable to 5.5V 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 –0.2 — V in V Operating T emperature Range T a Over Vin Range –40 (i) — 85 °C Solder Reflow T emperature T reflow Surface temperature of module body or pins 215 (ii) °C Storage T emperature T s — –40 — 125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 — TBD — G’s1 msec, ½ Sine, mounted Mechanical Vibration Mil-STD-883D, Method 2007.2 — TBD — G’s20-2000 Hz Weight — — 5 — grams Flammability — Meets UL 94V-O Notes: (i) For operation below 0 °C the external capacitors must bave stable characteristics. Use either a low ESR tantalum, Os-Con, or ceramic capacitor. (ii) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the s tated maximum. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products.” Specifications (Unless otherwise stated, Ta =25 °C, Vin =12 V , Vout =3.3 V , Cin=560 µF, Co1 =0 µF , and Io =Iomax) ATH10K12 Characteristics Symbols Conditions Min Typ Max Units Output Current I o 1.2 V ≤ Vo ≤ 5.5 V, 85 °C, 200 LFM airflow 0 — 10 (1) A25 °C, natural convection 0 — 10 (1) Input Voltage Range V in Over Io range 10.8 — 13.2 V Set-Point Voltage T olerance V o tol — — ±2 (2) %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% V o–40 °C ≤ Ta ≤ +85 °C Efficiency η Io =8 A R SET = 280 Ω Vo = 5.0 V — 94 — RSET = 2.0 kΩ Vo = 3.3 V — 92 — RSET = 4.32 kΩ Vo = 2.5 V — 90 — RSET = 8.06 kΩ Vo = 2.0 V — 88 — % RSET = 11.5 kΩ Vo = 1.8 V — 87 — RSET = 24.3 kΩ Vo = 1.5 V — 85 — RSET = open cct Vo = 1.2 V — 83 — Vo Ripple (pk-pk) V r 20 MHz bandwidth, V o ≤2.5 V — 25 (3) — mVpp Co2 =10µF ceramic V o >2.5 V — 1 (3) —% V o Over-Current Threshold I o trip Reset, followed by auto-recovery — 20 — A T ransient Response 1 A/µs load step, 50 to 100 % I omax, Co1 =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 9 /10) I IL margin Pin to GND — – 8 (4) —µ A T rack Input Current (pin 8) I IL track Pin to GND — — –0.13 (5) mA T rack Slew Rate Capability dV track/dt Vtrack – Vo ≤ 50 mV and Vtrack < Vo(nom) 5 — — V/ms Under-Voltage Lockout UVLO V in increasing — 9.5 10.4 VVin decreasing 8.8 9 — Inhibit Control (pin3) R eferenced to GND Input High Voltage V IH Vin –0.5 — Open (5) V Input Low Voltage VIL –0.2 — 0.5 Input Low Current IIL inhibit Pin to GND — –0.24 — mA Input Standby Current I in inh Inhibit (pin 3) to GND, T rack (pin 8) open — 10 — mA Switching Frequency ƒ s Over Vin and Io ranges 300 350 400 kHz External Input Capacitance C in 560 (6) ——µ F External Output Capacitance C out 0 330 (7) TBD µF Reliability MTBF Per Bellcore TR-332 TBD — — 10 6 Hrs50 % stress, Ta =40 °C, ground benign Notes: (1) See SOA curves or consult factory for appropriate derating. (2) 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. (3) The pk-pk output ripple voltage is measured with an external 10 µF ceramic capacitor. See the standard application schematic . (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 (7.5 V for pin 8). If it is left open-circuit the module w ill operate when input power is applied. A small low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related applicat ion note. (6) A 560 µF input capacitor are required for proper operation. The electrolytic capacitor must be rated for a minimum of 800 mA rms of ripple current. For further information, consult the related application note regarding capacitor selection. (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. 10-A, 12-V I nput Non-Isolated Wide-Output Adjust Power Module ATH10K12 Series —12-V Input

The products listed hereunder are prototype or pre-production devices which have not been fully qualified to Astec’s specifications. Product specifications are subject to change without notice. Astec makes no warranty, either expressed, implied, or statutory, including implied warranty of merchantab ility or fitness for a specific purpose, of these products. 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 =12 V (See Note A) Efficiency vs Load Current Power Dissipation vs Load Current Output Ripple vs Load Current (See Note 3 of T able) Safe Operating Area; Vin =12 V (See Note B) Output Voltage =3.3 V 10-A, 12-V I nput Non-Isolated Wide-Output Adjust Power Module ATH10K12 Series —12-V Input 02468 1 0 Iout (A) Ambient Temperature (°C) 400LFM 200LFM 100LFM Nat conv Airflow 100 02468 1 0 Iout - Amps Efficiency - % 5.0 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V VOUT 100 02468 1 0 Iout - Amps Ripple - mV 5.0 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V VOUT 02468 1 0 Iout - Amps Pd - Watts 5.0 V 3.3 V 2.5 V 1.2 V VOUT

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Adjusting the Output V oltage of the ATH10K12 Wide-Output Adjust Power Module The Vo Adjust control (pin 4) is used to set the output voltage to a value higher than 1.2 V . The adjustment method requires the addition of a single external resistor, R set, that must be connected directly between the Vo Adjust and GND pins 1. T able 1-1 gives the preferred value for the external resistor for a number 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 1-2. Figure 1-1 shows the placement of the required resistor. Rset = 10 kΩ · 0.8 V – 1.82 kΩVout – 1.2 V Figure 1-1; Vo Adjust Resistor Placement Notes: 1. Use a 0.1 W resistor. The tolerance should be 1 %, with temperature a stability of 100 ppm/°C (or better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 7 using dedicated PCB traces. 2. 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.

1.200 Open

1.225 318 k Ω 1.250 158 k Ω 1.275 105 k Ω 1.300 78.2 k Ω 1.325 62.2 k Ω 1.350 51.5 k Ω 1.375 43.9 k Ω 1.400 38.2 k Ω 1.425 33.7 k Ω 1.450 30.2 k Ω 1.475 27.3 k Ω 1.50 24.8 k Ω 1.55 21 k Ω 1.60 18.2 k Ω 1.65 16 k Ω 1.70 14.2 k Ω 1.75 12.7 k Ω 1.80 11.5 k Ω 1.85 10.5 k Ω 1.90 9.61 k Ω 1.95 8.85 k Ω 2.00 8.18 k Ω 2.05 7.59 k Ω 2.10 7.07 k Ω 2.15 6.6 k Ω 2.20 6.18 k Ω 2.25 5.8 k Ω 2.30 5.45 k Ω 2.35 5.14 k Ω 2.40 4.85 k Ω 2.45 4.85 k Ω 2.50 4.33 k Ω 2.55 4.11 k Ω 2.60 3.89 k Ω 2.65 3.7 k Ω 2.70 3.51 k Ω Vout (Standard) R set (Pref’d Value) V out (Actual) 5 V 280 Ω 5.009 V 3.3 V 2 k Ω 3.294V 2.5 V 4.32 k Ω 2.503 V 2 V 8.06 k Ω 2.010V 1.8 V 11.5 k Ω 1.801 V 1.5 V 24.3 k Ω 1.506 V 1.2 V Open 1.200 V Table 1-1; Preferred Values of R set for Standard Output Voltages ATH10K12 Series Table 1-2; Output Voltage Set-Point Resistor Values Va Req’d R set Va Req’d R set 2.75 3.34 k Ω 2.80 3.18 k Ω 2.85 3.03 k Ω 2.90 2.89 k Ω 2.95 2.75 k Ω 3.00 2.62 k Ω 3.05 2.5 k Ω 3.10 2.39 k Ω 3.15 2.28 k Ω 3.20 2.18 k Ω 3.25 2.08 k Ω 3.30 1.99 k Ω 3.35 1.9 k Ω 3.40 1.82 k Ω 3.45 1.74 k Ω 3.50 1.66 k Ω 3.55 1.58 k Ω 3.6 1.51 k Ω 3.7 1.38 k Ω 3.8 1.26 k Ω 3.9 1.14 k Ω 4.0 1.04 k Ω 4.1 939 Ω 4.2 847 Ω 4.3 761 Ω 4.4 680 Ω 4.5 604 Ω 4.6 533 Ω 4.7 466 Ω 4.8 402 Ω 4.9 342 Ω 5.0 285 Ω 5.1 231 Ω 5.2 180 Ω 5.3 131 Ω 5.4 85 Ω 5.5 41 Ω VIN C IN 560 µF (Required) + C OUT 330 µF (Optional) GND VOUT Vo Sense R SET 0.1 W 1 % PTH12060 ATH10K12-9S

North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Table 2-1: Input/Output Capacitors (1) N/R –Not recommended. The voltage rating does not meet the m inimum operating limits. Tantalum Capacitors T antalum type capacitors can be used for the output but only the AVX TPS, Sprague 593D/594/595 or Kemet T495/T510 series. These capacitors are recommended over many other tantalum types due to their higher rated surge, power dissipation, and rip ple current capability. As a caution the TAJ series by AVX is not recommended. This series has considerably higher ESR, reduced power dissipation, and lower ripple current capability. The TAJ series is also less reliable than the AVX TPS series when determining power dissipation capability. Ceramic Capacitors Ceramic capacitors will compliment electrolytic types. Adding 10 µF or more ceramic capacitance will reduce ripple on the input and output bus. Output ripple and transient measurement accuracy is improved by measur- ing directly across a 10 µF ceramic capacitor. Capacitor Table T able 2-1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The number of capacitors required at both the input and output buses is identified for each part 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 are critical parameters necessary to insure both optimum regulator performance and long capacitor life. ATH10K12: Capacitor Recommendations Input Capacitor The recommended input capacitance is determined by 560 µF minimum capacitance and 1050 mArms minimum ripple current rating. A 10-µF ceramic capacitor can be used to reduce input ripple. This should be located be- tween the input electrolytic and the module. A suggested ceramic part number is the Murata GRM31CR61C106K or similar ‘X7R’ capacitor. Ripple current and <100 m Ω equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capaci- tors. T antalum capacitors have a recommended minimum voltage rating of 2 × (max. dc voltage + ac ripple). T anta- lum capacitors are not recommended on the input bus as there are none with a sufficient voltage rating. Output Capacitors: Optional The recommended ESR of the output capacitor is less than or equal to 150 mΩ . Electrolytic capacitors have marginal ripple performance at frequencies above 400 kHz but excellent low frequency transient response. Above the ripple frequency, ceramic capacitors are necessary to improve the transient response and reduce any high fre- quency noise components apparent during higher current excursions. Tantalum or Os-con types are recommended for applications where ambient temperatures fall below 0°C. /rodneVroticapaC seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV )Fµ(eulaVt nelaviuqE)RSE( ecnatsiseRseireS mumixaMC°501 elppiR )smrI(tnerruC eziSlacisyhP )mm( tupnI suB lanoitpO tuptuO suB rebmuNtraProdneV )TMS(AWcinosanaP laidaR-CF )TMS(KF V61 V52 V52 V53 033 065 0001 086 220.0 Ω 560.0 Ω 060.0 Ω 060.0 Ω Am0014> Am5021 Am0011 Am0011 01 × 2.01 5.21 × 51 5.21 × 5.31 5.21 × 5.31 P133C1AWFEE S165E1CFUEE Q201E1KFVEE Q186V1KFVEE XF-noC-imehCdetinU seireSSP ZXL )TMS(AXP V61 V61 V61 V61 033 033 086 3x081 810.0 Ω 410.0 Ω 860.0 Ω 620.0 Ω Am0054 Am0505> Am0501 Am0043> 01 × 5.01 01 × 5.21 01 × 61 01 × 7.7 M033XF61 21JM033SP61 LL61X01M186BV61ZXL PT08JM181CV61AXP nocihciN seireSMP GW V52 V52 V53 V52 065 086 065 033 060.0 Ω 550.0 Ω 840.0 Ω 51.0 ÷2 Ω Am0601 Am0721 Am0631 Am0011> 5.21 × 51 61 × 51 61 × 51 01 × 01 6HHM165E1MPU 6HHM186E1MPU 6HHM165V1MPU SG1RNM133E1GWU :noc-sO PS )TMS(PVS V61 V61 072 033 810.0 Ω 610.0 Ω Am0053> Am0074 01 × 5.01 11 × 21 M072PS61 M033PVS61 mulatnaTXVA SPT) TMS( V01 V01 033 033 01.0 Ω 60.0 Ω Am0052> Am0003> L3.7 × W7.5 × H1.4 R/N )1( R/N )1( 0010R010M733ESPT V( o )V1.5< 0600R010M733VSPT V( o )V1.5< mulatnaTtemeK seireS594T/025T )TMS( V01 V01 033 022 40.0 Ω 70.0 Ω Am0061 Am0002> W3.4 × L3.7 × H0.4 R/N )1( R/N )1( SA010M733X025 V( o )V1.5< SA0010M722X594T V( o )V1.5< mulatnaTeugarpS seireSD495 )TMS( V010 335 40.0 Ω Am0632L 2.7 × W6 × H1.4 R/N )1( 1T 2R0100X733D495 V( o )V1.5< ATH10K12 Series

ATH Series of Wide-Output Adjust Power Modules (12-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 from T exas Instruments 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 customer design flexibility. The POLA is a collaboration between T exas Instruments, Artesyn T ech- nologies, and Astec Power to offer customers advanced non-isolated modules that provide the same functionality and form factor. Pr oduct 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 Series, 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 (6A) provides operating features such as an on/off inhibit, output voltage 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 (18/22A) and ATH26/30 (26/30A) products incor- porate over-temperature shutdown protection. All of the products referenced in T able 3-1 include Auto-T rack™. Power-Up Characteristics When configured per their standard application all the ATH products will produce a regulated output voltage fol- lowing the application of a valid input source voltage. All the modules include soft-start circuitry. This slows the initial rate in which the output voltage can rise, thereby limiting the amount of in-rush current that can be drawn from the input source. The soft-start circuitry also introduces a short time delay (typically 5 ms-10 ms) into the power-up characteristic. This delay is from the point that a valid input source is recognized, to the initial rise of the output voltage. Figure 3-1 shows the power-up characteristic of the 10-A output product (ATH10K12), operating from a 12-V input bus and configured for a 3.3-V output. The waveforms were measured with a 5-A constant current load. The initial rise in input current when the input voltage first starts to rise is the charge current drawn by the input capacitors. Figure 3-1 Vin (5 V/Div) Vo (2 V/Div) Iin (2 A/Div) HORIZ SCALE: 5 ms/Div Over-Current Protection For protection against load faults, all modules incorporate output over-current protection. Applying a load that exceeds the regulator’s over-current threshold will cause the regulated output to shut down. Following shutdown, a module will periodically attempt to recover by initiating a soft-start power-up. This is described as a “hiccup” mode of operation, whereby the module continues in a cycle of successive shutdown and power up until the load fault is removed. During this period, the average current flowing into the fault is significantly reduced. Once the fault is removed, the module automatically recovers and returns to normal operation. Series Input Bus I OUT

12 V 6 A  

Adjust (Trim) Thermal Shutdown Pre-Bias Startup Margin Up/Down Auto-Track™ 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. 10 A ATH06 ATH10 ATH12/15 ATH18/22 ATH26/30

ATH Series of Wide-Output Adjust Power Modules (12-V Input) North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 Figure 3-5; Simultaneous Power Up with Auto-Track Control PTH12010W Track VIN VO GNDInhibit PTH12020W Track VIN VO GNDInhibit

7 COUT

Vo2 =2V Vo1 =3.3V +12V On/Off Control 1 = Power Down 0 = Power Up BSS138 0.047µF 100k 2.0kΩ 8k06 Figure 3-4; Sequenced Power Up & Power Down Using Auto-Track Figure 3-6; Simultaneous Power Down with Auto-Track Control Vo1 (1 V/Div) Vo2 (1 V/Div) On/Off Control (5 V/Div) HORIZ SCALE: 10 ms/Div Vo1 (1V/Div) Vo2 (1 V/Div) On/Off Control (5 V/Div) HORIZ SCALE: 5 ms/Div ATH18K12 ATH12K12

ATH Series of Wide-Output Adjust Power Modules (12-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 (See Figure 3-4). 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 3-7). 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 3-7; 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 Cout +Cin VIN GND MargDn L O A D +VOUT MargUp +Vo RD RU PTH05010W (Top View) 10 9 8 543 GND RSET

0.1 W, 1 %