PDT012A0X LINEAGEPOWER | Alldatasheet
Document overview
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Technical content
Features
Compliant to RoHS EU Directive 2002/95/EC (Z versions) Compatible in a Pb-free or SnPb reflow environment (Z versions) DOSA based Wide Input voltage range (3Vdc-14.4Vdc) Output voltage programmable from 0.6Vdc to 5.5Vdc via external resistor Digital interface through the PMBusTM # protocol Tunable LoopTM to op timize dynamic output voltage response Flexible output voltage sequencing EZ- SEQUENCE Power Good signal Fixed switching frequency with capability of external synchronization Output overcurrent protection (non-latching) Overtemperature protection Remote On/Off Ability to sink and source current Cost efficient open frame design Small size: 12.2 mm x 12.2 mm x 8.5 mm (0.48 in x 0.48 in x 0.335 in) Wide operating temperature range [-40°C to 85°C] UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-03 Certified, and VDE‡ 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities
Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment Industrial equipment
Description
The 12A Digital Pico DLynxTM power modules are non-isolated dc-dc converters that can deliver up to 12A of output current. These modules operate over a wide range of input voltage (VIN = 3Vdc-14.4Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 5.5Vdc, programmable via an external resistor. Features include a digital interface using the PMBus protocol, remote On/Off, adjustable output voltage, over current and overtemperature protection. The PMBus interface supports a range of commands to both control and monitor the module. The module also includes the Tunable Loop TM feature that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area. ADDR0 TRIM VOUT VS+ GND RTUNE CTUNE RTrim VIN CoCin Vout+Vin+ ON/OFFQ1 SEQ MODULE PGOOD SMBALRT# SIG_GND ADDR1 RADDR0 CLK DATA VS- RADDR1 GND RoHS Compliant
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 2 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Device Symbol Min Max Unit Input Voltage All V IN -0.3 15 V Continuous SEQ, SYNC, VS+ All 7 V CLK, DATA, SMBALERT All 3.6 V Operating Ambient Temperature All T A -40 85 °C (see Thermal Considerations section) Storage Temperature All T stg -55 125 °C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit Operating Input Voltage All V IN 3 ⎯ 14.4 Vdc Maximum Input Current All I IN,max 9 Adc (VIN=3V to 14V, IO=IO, max ) Input No Load Current (VIN = 12Vdc, IO = 0, module enabled) VO,set = 0.6 Vdc I IN,No load 52 mA VO,set = 5Vdc I IN,No load 85 mA Input Stand-by Current (VIN = 12Vdc, module disabled) All I IN,stand-by 6.5 mA Inrush Transient All I t 1 A s Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax ; See Test Configurations) All 40 mAp-p Input Ripple Rejection (120Hz) All -55 dB
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 3 Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Output Voltage Set-point (with 0.1% tolerance for external resistor used to set output voltage) All V O, set -1.0 +1.0 % V O, set Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) All V O, set -3.0 ⎯ +3.0 % V O, set Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on the input voltage – see Feature Descriptions Section) All V O 0.6 5.5 Vdc PMBus Adjustable Output Voltage Range All V O,adj -25 0 +25 %V O,set PMBus Output Voltage Adjustment Step Size All 0.4 %V O,set Remote Sense Range All 0.5 Vdc Output Regulation (for VO ≥ 2.5Vdc) Line (VIN=VIN, min to VIN, max) All ⎯ +0.4 % V O, set Load (IO=IO, min to IO, max) All ⎯ 10mV % V O, set Output Regulation (for VO < 2.5Vdc) Line (VIN=VIN, min to VIN, max) All ⎯ 5 mV Load (IO=IO, min to IO, max) All ⎯ 10 mV Temperature (Tref=TA, min to TA, max) All ⎯ 0.4 % V O, set Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 22 μF ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 50 100 mV pk-pk RMS (5Hz to 20MHz bandwidth) All 20 38 mV rms External Capacitance Without the Tunable Loop TM ESR ≥ 1 mΩ All C O, max 22 ⎯ 47 μF With the Tunable Loop TM ESR ≥ 0.15 mΩ All C O, max 22 ⎯ 1000 μF ESR ≥ 10 mΩ All C O, max 22 ⎯ 5000 μF Output Current (in either sink or source mode) All I o 0 12 Adc Output Current Limit Inception (Hiccup Mode) (current limit does not operate in sink mode) All I O, lim 130 % I o,max Output Short-Circuit Current All I O, s/c 0.92 A (VO≤250mV) ( Hiccup Mode ) PMBus Output Current Measurement Accuracy All TBD Efficiency V O,set = 0.6Vdc η 76.4 % VIN= 12Vdc, TA=25°C V O, set = 1.2Vdc η 86.0 % IO=IO, max , VO= VO,set V O,set = 1.8Vdc η 89.9 % V O,set = 2.5Vdc η 92.2 % V O,set = 3.3Vdc η 93.6 % V O,set = 5.0Vdc η 95.4 % Switching Frequency All f sw ⎯ 600 ⎯ kHz External capacitors may require using the new Tunable Loop TM feature to ensure that the module is stable as well as getting the best transient response. See the Tunable Loop TM section for details.
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 4 Electrical Specifications (continued) Parameter Device Symbol Min Typ Max Unit Frequency Synchronization All Synchronization Frequency Range All 510 720 kHz High-Level Input Voltage All V IH 2.0 V Low-Level Input Voltage All V IL 0.4 V Input Current, SYNC All I SYNC 100 nA Minimum Pulse Width, SYNC All t SYNC 100 ns Maximum SYNC rise time All t SYNC_SH 100 ns General Specifications Parameter Device Min Typ Max Unit Calculated MTBF (IO=0.8IO, max, TA=40°C) Telecordia Issue 2 Method 1 Case 3 All TBD Hours Weight ⎯ TBD ⎯ g (oz.) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Device code with suffix “4” – Positive Logic (See Ordering Information) Logic High (Module ON) Input High Current All I IH ⎯ 1 mA Input High Voltage All V IH 2.0 ⎯ VIN,max V Logic Low (Module OFF) Input Low Current All I IL ⎯ ⎯ 1 mA Input Low Voltage All V IL -0.2 ⎯ 0.6 V Device Code with no suffix – Negative Logic (See Ordering Information) (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Logic High (Module OFF) Input High Current All I IH ― ― 1 mA Input High Voltage All V IH 2.0 ― V IN, max Vdc Logic Low (Module ON) Input low Current All I IL ― ― 10 μA Input Low Voltage All V IL -0.2 ― 0.6 Vdc
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 5 Feature Specifications (cont.) Parameter Device Symbol Min Typ Max Units Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within ±1% of steady state) Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo = 10% of Vo, set) All Tdelay ― 1.1 ― msec Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo = 10% of Vo, set) All Tdelay ― 700 ― μsec Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set) All Trise ― 3.1 ― msec Output voltage overshoot (TA = 25 o C VIN= VIN, min to VIN, max,IO = IO, min to IO, max) With or without maximum external capacitance 3.0 % V O, set Over Temperature Protection (See Thermal Considerations section) All T ref 145 °C PMBus Over Temperature Warning Threshold All T WARN 130 °C Tracking Accuracy (Power-Up: 2V/ms) All V SEQ –Vo 100 mV (Power-Down: 2V/ms) All V SEQ –Vo 100 mV (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) Input Undervoltage Lockout Turn-on Threshold All 2.475 3.025 Vdc Turn-off Threshold All 2.25 2.75 Vdc Hysteresis All 0.25 Vdc PMBus Adjustable Input Under Voltage Lockout Thresholds All 2.5 14 Vdc Resolution of Adjustable Input Under Voltage Threshold All 500 mV PGOOD (Power Good) Signal Interface Open Drain, Vsupply ≤ 5VDC Overvoltage threshold for PGOOD ON 108 %V O, set Overvoltage threshold for PGOOD OFF 105 %V O, set Undervoltage threshold for PGOOD ON 110 %V O, set Undervoltage threshold for PGOOD OFF 90 %V O, set Pulldown resistance of PGOOD pin All 50 Ω
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 6 Digital Interface Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Conditions Symbol Min Typ Max Unit PMBus Signal Interface Characteristics Input High Voltage (CLK, DATA) V IH 2.1 3.6 V Input Low Voltage (CLK, DATA) V IL 0.8 V Input high level current (CLK, DATA) I IH -10 10 μA Input low level current (CLK, DATA) I IL -10 10 μA Output Low Voltage (CLK, DATA, SMBALERT#) I OUT=2mA V OL 0.4 V Output high level open drain leakage current (DATA, SMBALERT#) VOUT=3.6V I OH 0 10 μA Pin capacitance C O 0.7 pF PMBus Operating frequency range Slave Mode F PMB 10 400 kHz Data hold time Receive Mode Transmit Mode tHD:DAT 0 300 ns Data setup time t SU:DAT 250 ns Measurement System Characteristics Read delay time tDLY 153 192 231 μs Output current measurement range IRNG 0 18 A Output current measurement resolution IRES 62.5 mA Output current measurement gain accuracy IACC TBD % Output current measurement offset IOFST TBD A VOUT measurement range VOUT(rng) 0 5.5 V VOUT measurement resolution VOUT(res) 16.25 mV VOUT measurement gain accuracy VOUT(gain) -2 2 LSB VOUT measurement offset VOUT(ofst) -3 3 LSB VIN measurement range VIN(rng) 0 14.4 V VIN measurement resolution VIN(res) 32.5 mV VIN measurement gain accuracy VIN(gain) -2 2 LSB VIN measurement offset VIN(ofst) -5.5 1.4 LSB
Figure 41. Circuit configuration for programming output voltage using an external resistor.
0.6 Open
the SENSE pin and VOUT pin should not exceed 0.5V. representative for additional details. Figure 42. Circuit Configuration for margining feature, leave it unconnected. voltage down to the reference voltage of the module. fed to the SEQ pin as shown in Fig. 43. Figure 43. Circuit showing connection of the sequencing signal to the SEQ pin.
Table 3 will ensure stable operation of the module. capacitance values or input voltages other than 12V. Table 2. General recommended values of of R ceramic capacitor combinations. Table 3. Recommended values of RTUNE and CTUNE
Specification can be obtained from www.pmbus.org. saved to non-volatile storage). two octal (0 to 7) digits, with each pin setting one digit. Table 4, the module will respond to address 127. Figure 47. Circuit showing connection of resistors used to set the PMBus address of the module.
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 19 OPERATION command. This bit is used together with the CP, CMD and ON bits to determine startup. Bit Value Action Module powers up any time power is present regardless of state of the analog ON/OFF pin Module does not power up until commanded by the analog ON/OFF pin and the OPERATION command as programmed in bits [2:0] of the ON_OFF_CONFIG register. CMD: The CMD bit controls how the device responds to the OPERATION command. Bit Value Action
0 Module ignores the ON bit in the
1 Module responds to the ON bit in the
CPR: Sets the response of the analog ON/OFF pin. This bit is used together with the CMD, PU and ON bits to determine startup. Bit Value Action Module ignores the analog ON/OFF pin, i.e. ON/OFF is only controlled through the PMBUS via the OPERATION command
1 Module requires the analog ON/OFF pin
to be asserted to start the unit PMBus Adjustable Soft Start Rise Time The soft start rise time can be adjusted in the module via PMBus. When setting this parameter, make sure that the charging current for output capacitors can be delivered by the module in addition to any load current to avoid nuisance tripping of the overcurrent protection circuitry during startup. The TON_RISE command sets the rise time in ms, and allows choosing soft start times between 600μs and 9ms, with possible values listed in Table 5. Note that the exponent is fixed at -4 (decimal) and the upper two bits of the mantissa are also fixed at 0. Table 5 Rise Time Exponent Mantissa 600μs 11100 00000001010 900μs 11100 00000001110 1.2ms 11100 00000010011 1.8ms 11100 00000011101 2.7ms 11100 00000101011 4.2ms 11100 00001000011 6.0ms 11100 00001100000 9.0ms 11100 00010010000 Output Voltage Adjustment Using the PMBus The VOUT_SCALE_LOOP parameter is important for a number of PMBus commands related to output voltage trimming, margining, over/under voltage protection and the PGOOD thresholds. The output voltage of the module is set as the combination of the voltage divider formed by RTrim and a 20kΩ upper divider resistor inside the module, and the internal reference voltage of the module. The reference voltage VREF is nominally set at 600mV, and the output regulation voltage is then given by REFOUT VRTrim RTrimV × += 20000 Hence the module output voltage is dependent on the value of RTrim which is connected external to the module. The information on the output voltage divider ratio is conveyed to the module through the VOUT_SCALE_LOOP parameter which is calculated as follows: RTrim RTrimLOOPSCALEVOUT += 20000__ The VOUT_SCALE_LOOP parameter is specified using the “Linear” format and two bytes. The upper five bits [7:3] of the high byte are used to set the exponent which is fixed at –9 (decimal). The remaining three bits of the high byte [2:0] and the eight bits of the lower byte are used for the mantissa. The default value of the mantissa is 00100000000 corresponding to 256 (decimal), corresponding to a divider ratio of 0.5. The maximum value of the mantissa is 512 corresponding to a divider ratio of 1. Note that the resolution of the VOUT_SCALE_LOOP command is 0.2%. When PMBus commands are used to trim or margin the output voltage, the value of V REF is what is changed inside the module, which in turn changes the regulated output voltage of the module. The nominal output voltage of the module can be adjusted with a minimum step size of 0.4% over a ±25% range from nominal using the VOUT_TRIM command over the PMBus. The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value using the “Linear” mode with the exponent fixed at –10 (decimal). The value of the offset voltage is given by )( 2_ −×= TRIMVOUTV offsetOUT This offset voltage is added to the voltage set through the divider ratio and nominal VREF to produce the trimmed output voltage. The valid range in two’s complement for this command is –4000h to 3999h. The high order two bits of the high byte must both be either 0 or 1. If a value outside of the +/-25% adjustment range is given with this command, the module will set it’s output voltage to the nominal value (as if VOUT_TRIM had been set to 0), assert
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 20 SMBALRT#, set the CML bit in STATUS_BYTE and the invalid data bit in STATUS_CML. Output Voltage Margining Using the PMBus The module can also have its output voltage margined via PMBus commands. The command VOUT_MARGIN_HIGH sets the margin high voltage, while the command VOUT_MARGIN_LOW sets the margin low voltage. Both the VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW commands use the “Linear” mode with the exponent fixed at –10 (decimal). Two bytes are used for the mantissa with the upper bit [7] of the high byte fixed at 0. The actual margined output voltage is a combination of the VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW and the VOUT_TRIM values as shown below. TRIMVOUTHIGHMARGINVOUT V MHOUT TRIMVOUTLOWMARGINVOUT V MLOUT Note that the sum of the margin and trim voltages cannot be outside the ±25% window around the nominal output voltage. The data associated with VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW can be stored to non-volatile memory using the STORE_DEFAULT_ALL command. The module is commanded to go to the margined high or low voltages using the OPERATION command. Bits [5:2] are used to enable margining as follows: 00XX : Margin Off 0101 : Margin Low (Ignore Fault) 0110 : Margin Low (Act on Fault) 1001 : Margin High (Ignore Fault) 1010 : Margin High (Act on Fault) PMBus Adjustable Overcurrent Warning The module can provide an overcurrent warning via the PMBus. The threshold for the overcurrent warning can be set using the parameter IOUT_OC_WARN_LIMIT. This command uses the “Linear” data format with a two byte data word where the upper five bits [7:3] of the high byte represent the exponent and the remaining three bits of the high byte [2:0] and the eight bits in the low byte represent the mantissa. The exponent is fixed at –1 (decimal). The upper six bits of the mantissa are fixed at 0 while the lower five bits are programmable with a default value of TBD (decimal). The resolution of this warning limit is 500mA. The value of the IOUT_OC_WARN_LIMIT can be stored to non-volatile memory using the STORE_DEFAULT_ALL command. Temperature Status via PMBus The module can provide information related to temperature of the module through the STATUS_TEMPERATURE command. The command returns information about whether the pre-set over temperature fault threshold and/or the warning threshold have been exceeded. PMBus Adjustable Output Over and Under Voltage Protection The module has output over and under voltage protection capability. The PMBus command VOUT_OV_FAULT_LIMIT is used to set the output over voltage threshold from four possible values: 108%, 110%, 112% or 115% of the nominal output voltage. The command VOUT_UV_FAULT_LIMIT sets the threshold that causes an output under voltage fault and can also be selected from four possible values: 92%, 90%, 88% or 85%. The default values are 112% and 88% of nominal output voltage. Both commands use two data bytes formatted as two’s complement binary integers. The “Linear” mode is used with the exponent fixed to –10 (decimal) and the effective over or under voltage trip points given by: )_( )_( 2)___( 2)___( LIMITFAULTUVVOUTV LIMITFAULTOVVOUTV REQUVOUT REQOVOUT Values within the supported range for over and undervoltage detection thresholds will be set to the nearest fixed percentage. Note that the correct value for VOUT_SCALE_LOOP must be set in the module for the correct over or under voltage trip points to be calculated. In addition to adjustable output voltage protection, the 12A Digital Pico DLynxTM module can also be programmed for the response to the fault. The VOUT_OV_FAULT RESPONSE and VOUT_UV_FAULT_RESPONSE commands specify the response to the fault. Possible choices are shown below. 1. Continue operation without interruption 2. Continue for four switching cycles and then shut down if the fault is still present, followed by no restart or continuous restart (can select either option) 3. Immediate shut down followed by no restart or continuous restart (can select either option). 4. Module output is disabled when the fault is present and the output is enabled when the fault no longer exists. Note that separate response choices are possible for output over voltage or under voltage faults. PMBus Adjustable Input Undervoltage Lockout The module allows adjustment of the input under voltage lockout and hysteresis. The command VIN_ON allows setting the input voltage turn on threshold, while the VIN_OFF command sets the input voltage turn off threshold. For the VIN_ON command, possible values are 2.75V, and 3V to 14V in 0.5V steps. For the VIN_OFF command, possible values are 2.5V to 14V in 0.5V steps. If other values are entered for either command, they will be mapped to the closest of the allowed values.
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 21 Power Good The module provides a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going outside the specified thresholds. The PGOOD thresholds are user selectable via the PMBus (the default values are as shown in the Feature Specifications Section). Each threshold is set up symmetrically above and below the nominal value. The POWER_GOOD_ON command sets the output voltage level above which PGOOD is asserted (lower threshold). For example, with a 1.2V nominal output voltage, the POWER_GOOD_ON threshold can set the lower threshold to 1.14 or 1.1V. Doing this will automatically set the upper thresholds to 1.26 or 1.3V. The POWER_GOOD_OFF command sets the level below which the PGOOD command is de-asserted. This command also sets two thresholds symmetrically placed around the nominal output voltage. Normally, the POWER_GOOD_ON threshold is set higher than the POWER_GOOD_OFF threshold. Both POWER_GOOD_ON and POWER_GOOD_OFF commands use the “Linear” format with the exponent fixed at –10 (decimal). The two thresholds are given by )_( )_( 2)__( 2)__( OFFGOODPOWERV ONGOODPOWERV OFFPGOODOUT ONPGOODOUT Both commands use two data bytes with bit [7] of the high byte fixed at 0, while the remaining bits are r/w and used to set the mantissa using two’s complement representation. Both commands also use the VOUT_SCALE_LOOP parameter so it must be set correctly. The default value of POWER_GOOD_ON is set at 1.1035V and that of the POWER_GOOD_OFF is set at 1.08V. The values associated with these commands can be stored in non-volatile memory using the STORE_DEFAULT_ALL command. The PGOOD terminal can be connected through a pullup resistor (suggested value 100KΩ) to a source of 5VDC or lower. Measurement of Output Current, Output Voltage and Input Voltage The module is capable of measuring key module parameters such as output current and voltage and input voltage and providing this information through the PMBus interface. Roughly every 200μs, the module makes 16 measurements each of output current, voltage and input voltage. Average values of of these 16 measurements are then calculated and placed in the appropriate registers. The values in the registers can then be read using the PMBus interface. Measuring Output Current Using the PMBus The module measures current by using the inductor winding resistance as a current sense element. The inductor winding resistance is then the current gain factor used to scale the measured voltage into a current reading. This gain factor is the argument of the IOUT_CAL_GAIN command, and consists of two bytes in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –15 (decimal). The remaining 11 bits in two’s complement binary format represent the mantissa. During manufacture, each module is calibrated by measuring and storing the current gain factor into non-volatile storage. The current measurement accuracy is also improved by each module being calibrated during manufacture with the offset in the current reading. The IOUT_CAL_OFFSET command is used to store and read the current offset. The argument for this command consists of two bytes composed of a 5-bit exponent (fixed at -4d) and a 11-bit mantissa. This command has a resolution of 62.5mA and a range of -4000mA to +3937.5mA. The READ_IOUT command provides module average output current information. This command only supports positive or current sourced from the module. If the converter is sinking current a reading of 0 is provided. The READ_IOUT command returns two bytes of data in the linear data format. The exponent uses the upper five bits [7:3] of the high data byte in two-s complement format and is fixed at –4 (decimal). The remaining 11 bits in two’s complement binary format represent the mantissa with the 11 th bit fixed at 0 since only positive numbers are considered valid. Note that the current reading provided by the module is not corrected for temperature. The temperature corrected current reading for module temperature TModule can be estimated using the following equation TBD Measuring Output Voltage Using the PMBus The module can provide output voltage information using the READ_VOUT command. The command returns two bytes of data all representing the mantissa while the exponent is fixed at -10 (decimal). During manufacture of the module, offset and gain correction values are written into the non-volatile memory of the module. The command VOUT_CAL_OFFSET can be used to read and/or write the offset (two bytes consisting of a 16-bit mantissa in two’s complement format) while the exponent is always fixed at -10 (decimal). The allowed range for this offset correction is -125 to 124mV. The command VOUT_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 22 to +0.121, with a resolution of 0.004. The corrected output voltage reading is then given by: OFFSETCALVOUT GAINCALVOUTadingInitialV adingFinalV OUT OUT )]__1()Re_([ )Re_( Measuring Input Voltage Using the PMBus The module can provide output voltage information using the READ_VIN command. The command returns two bytes of data in the linear format. The upper five bits [7:3] of the high data form the two’s complement representation of the mantissa which is fixed at –5 (decimal). The remaining 11 bits are used for two’s complement representation of the mantissa, with the 11th bit fixed at zero since only positive numbers are valid. During module manufacture, offset and gain correction values are written into the non-volatile memory of the module. The command VIN_CAL_OFFSET can be used to read and/or write the offset - two bytes consisting of a five-bit exponent (fixed at -5) and a11- bit mantissa in two’s complement format. The allowed range for this offset correction is -2to 1.968V, and the resolution is 32mV. The command VIN_CAL_GAIN can be used to read and/or write the gain correction - two bytes consisting of a five-bit exponent (fixed at -8) and a 11-bit mantissa. The range of this correction factor is -0.125 to +0.121, with a resolution of 0.004. The corrected output voltage reading is then given by: OFFSETCALVIN GAINCALVINadingInitialV adingFinalV IN IN )]__1()Re_([ )Re_( Reading the Status of the Module using the PMBus The module supports a number of status information commands implemented in PMBus. However, not all features are supported in these commands. A 1 in the bit position indicates the fault that is flagged. STATUS_BYTE : Returns one byte of information with a summary of the most critical device faults. Bit Position Flag Default Value
7 X 0
6 OFF 0
5 VOUT Overvoltage 0
4 IOUT Overcurrent 0
3 VIN Undervoltage 0
2 Temperature 0
1 CML (Comm. Memory Fault) 0
0 None of the above 0
STATUS_WORD : Returns two bytes of information with a summary of the module’s fault/warning conditions. Low Byte Bit Position Flag Default Value 1 CML (Comm. Memory Fault) 0
7 VOUT fault or warning 0
6 IOUT fault or warning 0
5 X 0
4 X 0
3 POWER_GOOD# (is negated) 0
2 X 0
1 X 0
0 X 0
STATUS_VOUT : Returns one byte of information relating to the status of the module’s output voltage related faults. Bit Position Flag Default Value
7 VOUT OV Fault 0
6 X 0
4 VOUT UV Fault 0
3 X 0
STATUS_IOUT : Returns one byte of information relating to the status of the module’s output voltage related faults. Bit Position Flag Default Value
7 IOUT OC Fault 0
5 IOUT OC Warning 0
STATUS_TEMPERATURE : Returns one byte of information relating to the status of the module’s temperature related faults. Bit Position Flag Default Value
7 OT Fault 0
6 OT Warning 0
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 23 STATUS_CML : Returns one byte of information relating to the status of the module’s communication related faults. Bit Position Flag Default Value
7 Invalid/Unsupported Command 0
6 Invalid/Unsupported Command 0
5 Packet Error Check Failed 0
1 Other Communication Fault 0
MFR_SPECIFIC_00 : Returns information related to the type of module and revision number. Bits [7:2] in the Low Byte indicate the module type (000000 corresponds to the PDT012 series of module), while bits [7:3] indicate the revision number of the module. Low Byte Bit Position Flag Default Value 7:2 Module Name 000000 1:0 Reserved 10 High Byte Bit Position Flag Default Value 7:3 Module Revision Number None 2:0 Reserved 000
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 24 Summary of Supported PMBus Commands Please refer to the PMBus 1.1 specification for more details of these commands. Table 5 Hex Code Command Brief Description Non-Volatile Memory Storage 01 OPERATION Turn Module on or off. Also used to margin the output voltage
02 ON_OFF_CONFIG Configures the ON/OFF functionality as a combination of analog ON/OFF
pin and PMBus commands YES
03 CLEAR_FAULTS Clear any fault bits that may have been set, also releases the SMBALERT#
signal if the device has been asserting it.
11 STORE_DEFAULT_ALL Stores all current storable register settings in module non-volatile memory
as new defaults on power up
12 RESTORE_DEFAULT_ALL Restores all of the storable register settings from module non-volatile
20 VOUT_MODE The module has MODE set to Linear and Exponent set to -10. These values cannot be changed
22 VOUT_TRIM Apply a fixed offset voltage to the output voltage command value YES
25 VOUT_MARGIN_HIGH Sets the target voltage for margining the output high YES
26 VOUT_MARGIN_LOW Sets the target voltage for margining the output low YES
29 VOUT_SCALE_LOOP Sets the scaling of the output voltage – equal to the feedback resistor
35 VIN_ON Sets the value of input voltage at which the module turns on YES
36 VIN_OFF Sets the value of input voltage at which the module turns off YES
38 IOUT_CAL_GAIN Returns the value of the gain correction term used to correct the measured
39 IOUT_CAL_OFFSET Returns the value of the offset correction term used to correct the measured
40 VOUT_OV_FAULT_LIMIT Sets the voltage level for an output overvoltage fault YES
41 VOUT_OV_FAULT_RESPONSE Instructs the module on what action to take in response to a output
44 VOUT_UV_FAULT_LIMIT Sets the voltage level for an output undervoltage fault YES
45 VOUT_UV_FAULT_RESPONSE Instructs the module on what action to take in response to a output
4A IOUT_OC_WARN_LIMIT Sets the output overcurrent warning level in A YES 5E POWER_GOOD_ON Sets the output voltage level at which the PGOOD pin is asserted high YES 5F POWER_GOOD_OFF Sets the output voltage level at which the PGOOD pin is de-asserted low YES
61 TON_RISE Sets the rise time of the output voltage during startup YES
78 STATUS_BYTE Returns one byte of information with a summary of the most critical module
79 STATUS_WORD Returns two bytes of information with a summary of the module’s
7A STATUS_VOUT Returns one byte of information with the status of the module’s output voltage related faults 7B STATUS_IOUT Returns one byte of information with the status of the module’s output current related faults 7D STATUS_TEMPERATURE Returns one byte of information with the status of the module’s temperature related faults 7E STATUS_CML Returns one byte of information with the status of the module’s communication related faults
88 READ_VIN Returns the value of the input voltage applied to the module
8B READ_VOUT Returns the value of the output voltage of the module 8C READ_IOUT Returns the value of the output current of the module
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 25 Summary of PMBus Commands Supported (cont.) Table 5 (continued) Hex Code Command Brief Description Non-Volatile Memory Storage 98 PMBUS_REVISION Returns one byte indicating the module is compliant to PMBus Spec. 1.1 (read only) YES A0 MFR_VIN_MIN Returns the minimum input voltage the module is specified to operate at (read only) YES A1 MFR_VIN_MAX Returns the maximum input voltage the module is specified to operate at (read only) YES A4 MFR_VOUT_MIN Returns the minimum output voltage possible from the module (read only) YES D0 MFR_SPECIFIC_00 Returns module name and revision number information (read only) YES D4 VOUT_CAL_OFFSET Applies an offset to the READ_VOUT command results to calibrate out offset errors in module measurements of the output voltage (between -125mV and +124mV) YES D5 VOUT_CAL_GAIN Applies a gain correction to the READ_VOUT command results to calibrate out gain errors in module measurements of the output voltage (between -0.125 and 0.121) YES D6 VIN_CAL_OFFSET Applies an offset correction to the READ_VIN command results to calibrate out offset errors in module measurements of the input voltage (between -2V and +1.968V) YES D7 VIN_CAL_GAIN Applies a gain correction to the READ_VIN command results to calibrate out gain errors in module measurements of the input voltage (between -0.125 and 0.121) YES
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 27 Example Application Circuit Requirements: Vin: 12V Vout: 1.8V Iout: 9A max., worst case load transient is from 6A to 9A ΔVout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (180mV, p-p) CI1 2x22 μF/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) CI2 47 μF/16V bulk electrolytic CO1 2 x 47 μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CO2 1 x 330 μF/6.3V Polymer (e.g. Sanyo Poscap) CTune 3300pF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 270 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 10k Ω SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) RADDR0 DA TA CLK VS- RADDR1 GND Vin+ CI2 CO2 A DDR0 VOU T VS+ GND TRIM CTUNE RTUNE RTrim VI N CO1CI1 Vout+ ON/OFFQ1 SEQ SMBALRT# MODULE PGOOD A DDR1 SIG_GND
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 28 Mechanical Outline Dimensions are in millimeters and (inches). PIN FUNCTION PIN FUNCTION
1 ON/OFF 10 PGOOD
2 VIN 11 SYNC
3 GND 12 VS-
4 VOUT 13 SIG. GND
5 VS+ (SENSE) 14 SMBALERT
6 TRIM 15 DATA
7 GND 16 ADDR0
8 CLK 17 ADDR1
9 SEQ
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 29 Recommended Pad Layout Dimensions are in millimeters and (inches). PIN FUNCTION PIN FUNCTION
4 VOUT 13 SIG_GND
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 30 Packaging Details The 12V Digital Pico DLynxTM 12A modules are supplied in tape & reel as standard. Modules are shipped in quantities of TBD modules per reel. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00”) Tape Width: 24.00 mm (0.945”)
number and the location of manufacture. speed should be considered to optimize this process. for special manufacturing process instructions. modules and can adversely affect long-term reliability. suggested Pb-free solder paste is Sn/Ag/Cu (SAC). Figure 50. Recommended linear reflow profile Cleaning Application Note (AN04-001).
15 Seconds
60 Seconds
February 1, 2011 12A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules 3 – 14.4Vdc input; 0.6Vdc to 5.5Vdc output; 12A output current LINEAGE POWER 32 Document No: DS10-009 ver. 0.27 PDF name: PDT012A0X.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 6. Device Codes Table 7. Coding Scheme
601 Shiloh Road, Plano, TX 75074, USA
application. No rights under any patent accompany the sale of any such product(s) or information. Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents. © 2011 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.