ATH22T033-9S

ATH22T033 Series —3.3-V Input 22-A, 3.3-V Input Non-Isolated Wide-Output Adjust Power Module REVISION 00 (3DEC2003) Features • Up to 22-A Output Current • 3.3-V Input Voltage • Wide-Output Voltage Adjust (0.8 V to 2.5 V) • Efficiencies up to 93 % • 120 W/in³ Power Density • On/Off Inhibit • Output Voltage Sense • Pre-Bias Startup • Margin Up/Down Controls • Under-Voltage Lockout • Auto-Track™ Sequencing • Output Over-Current Protection (Non-Latching, Auto-Reset) • Over-T emperature Protection • Operating Temp: –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 NOMINAL SIZE = 1.5 in x 0.87 in (38,1 mm x 22,1 mm) Description The ATH22T033 series of non-isolated power modules offers OEM designers a combination of high performance, small footprint, and industry leading features. As part of a new class of power modules these products provide designers with the flexibility to power the most complex multi-processor digital systems using off-the-shelf catalog parts. The series employs double-sided surface mount construction and provides highperformance step-down power conversion for up to 22 A of output current from a 3.3-V input bus voltage. The output voltage of the ATH22T033 can be set to any value over the range, 0.8 V to 2.5 V, using a single resistor. This series includes Auto-Track™. Auto-Track simplifies the task of supply voltage sequencing in a power system by enabling modules to track each other, or any external voltage, during power up and power down. Other operating features include an on/off inhibit, output voltage adjust (trim), and margin up/down controls. To ensure tight load regulation, an output voltage sense is also provided. A non-latching over-current trip and over-tempterature shutdown provide load fault protection. Target applications include complex multi-voltage, multi-processor systems that incorporate the industry’s high-speed DSPs, micro-processors and bus drivers. Pin Configuration Pin 1 2 3 4 5 6 7 8 9 10 Function GND Vin Inhibit * Vo Adjust Vo Sense Vout GND Track Margin Down * Margin Up * * Denotes negative logic: Open = Normal operation Ground = Function active ™ Track Auto- ncing e Sequ Standard Application Track Margin Down Margin Up 10 1 9 8 7 Rset = Resistor to set the desired output voltage (see spec. table for values). Cin = Required electrolytic 1,000 µF Cout = Recommended 330 µF electrolytic PTH03020W ATH22T033-9S VIN (Top View) 2 6 VOUT 3 4 5 Inhibit Vo Sense L O A D GND North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 + CIN 1,000 µF (Required) RSET (Required) 0.1 W, 1 % COUT 330 µF (Optional) GND + Asia (HK): 852-2437-9662 ATH22T033 Series —3.3-V Input 22-A, 3.3-V Input Non-Isolated Wide-Output Adjust Power Module REVISION 00 (3DEC2003) Ordering Information Input Voltage 2.95V to 3.65V Options: “-J” “-SJ” “-S” - Output Voltage 0.8V1 to 2.5V Output Current 22A Model Number ATH22T033-9(S)(J) Through-hole Termination, Tray Packaging SMT Termination, Tray Packaging SMT Termination, T&R Packaging Notes: 1 Preset output voltage is 0.8V; externally adjustable to 2.5V through the Vo,Adjust pin 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 Vout 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 lowlevel 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 regulator is significantly reduced. If the Inhibit pin is left open-circuit, the module will produce an output whenever a valid input source is applied. Vo Adjust: A 0.1 W, 1 % tolerance (or better) resistor must be connected between this pin and the GND pin to set the output voltage to the desired value. The set point range for the output voltage is from 0.8 V to 2.5 V. The resistor required for a given output voltage may be calculated from the following formula. If left open circuit, the module output will default to its lowest output voltage value. For further information on the adjustment of the output voltage consult the related application note. Rset = 10 k · 0.8 V Vout – 0.8 V – 2.49 k 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 Vout. 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 powered from the same input bus. If unused, the input may be left unconnected. 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 decreased 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. If unused, this input may be left unconnected. For further information, 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. If ununsed, this input may be left unconnected. For further information, consult the related application note. The specification table gives the preferred resistor values for a number of standard output voltages. North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662 ATH22T033 Series —3.3-V Input 22-A, 3.3-V Input Non-Isolated Wide-Output Adjust Power Module Environmental & Absolute Maximum Ratings Characteristics Track Input Voltage Operating T emperature Range Solder Reflow Temperature Storage T emperature Mechanical Shock Mechanical Vibration Weight Flammability — — Symbols Vtrack Ta Treflow Ts (Voltages are with respect to GND) Min –0.3 –40 –40 — — — — Typ — — — 500 20 10 5 Max Vin + 0.3 85 235 (i) 125 — — — — Units V °C °C °C G’s G’s grams Conditions Over Vin Range Surface temperature of module body or pins — Per Mil-STD-883D, Method 2002.3 1 msec, ½ Sine, mounted Mil-STD-883D, Method 2007.2 Suffix H 20-2000 Hz Suffix S 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 stated maximum. Specifications Characteristics Output Current (Unless otherwise stated, Ta =25 °C, V in =3.3 V, Vout =2 V, Cin =1,000 µF, C out =0 µF, and Io =Iomax) Symbols Io Vin Vo tol ∆Regtemp ∆Regline ∆Regload ∆Regtot η Conditions 60 °C, 200 LFM airflow 25 °C, natural convection Over Io range –40 °C