LM2853 LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER® Buck Regulator Literature Number: SNVS459 LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER ® Buck Regulator General Description Features SWITCHER ® The LM2853 synchronous SIMPLE buck regulator is a 550 kHz step-down switching voltage regulator capable of driving up to a 3A load with excellent line and load regulation. The LM2853 accepts an input voltage between 3.0V and 5.5V and delivers a customizable output voltage that is factory programmable from 0.8V to 3.3V in 100mV increments. Internal type-three compensation enables a low component count solution and greatly simplifies external component selection. The exposed-pad TSSOP-14 package enhances the thermal performance of the LM2853. n Input voltage range of 3.0V to 5.5V n Factory EEPROM set output voltages from 0.8V to 3.3V in 100 mV increments n Maximum load current of 3A n Voltage Mode Control n Internal type-three compensation n Switching frequency of 550 kHz n Low standby current of 12 µA n Internal 40 mΩ MOSFET switches n Standard voltage options 0.8/1.0/1.2/1.5/1.8/2.5/3.0/3.3 volts n Exposed pad TSSOP-14 package Applications n Low voltage point of load regulation n Local solution for FPGA/DSP/ASIC core power n Broadband networking and communications infrastructure Typical Application Circuit 20201502 Efficiency vs Load Current (VOUT = 3.3V) 20201501 SIMPLE SWITCHER ® is a Registered Trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation DS202015 www.national.com LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER ® Buck Regulator October 2006 LM2853 Connection Diagram 20201503 Ordering Information Order Number LM2853MH-0.8 LM2853MHX-0.8 LM2853MH-1.0 LM2853MHX-1.0 LM2853MH-1.2 LM2853MHX-1.2 LM2853MH-1.5 LM2853MHX-1.5 LM2853MH-1.8 LM2853MHX-1.8 LM2853MH-2.5 LM2853MHX-2.5 LM2853MH-3.0 LM2853MHX-3.0 LM2853MH-3.3 LM2853MHX-3.3 Voltage Option Package Marking 0.8 LM2853-0.8 1.0 LM2853-1.0 1.2 LM2853-1.2 1.5 LM2853-1.5 1.8 LM2853-1.8 2.5 LM2853-2.5 3.0 LM2853-3.0 3.3 LM2853-3.3 Package Type Package Drawing Supplied As 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail TSSOP-14 exposed pad MXA14A 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel 94 Units, Rail 2500 Units, Tape and Reel Note: Contact factory for other voltage options. Pin Descriptions Pin # Name 1 AVIN 2 EN 3 SGND Enable. Low noise ground. 4 SS Soft-Start Pin. 5 NC No Connect. This pin must be tied to ground. 6,7 PVIN 8,9 SW 10,11 PGND 12,13 NC 14 SNS Exposed Pad EP www.national.com Function Input Voltage for Control Circuitry. Input Voltage for Power Circuitry. Switch Pin. Power Ground. No-Connect. These pins must be tied to ground. Output Voltage Sense Pin. The exposed pad is internally connected to GND, but it cannot be used as the primary GND connection. The exposed pad should be soldered to an external GND plane. 2 14-Pin Exposed Pad TSSOP Package If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. AVIN, PVIN, EN, SNS, SW, SS Infrared (15 sec) 220˚C Vapor Phase (60 sec) 215˚C Soldering (10 sec) 260˚C −0.3V to 6.0V ESD Susceptibility (Note 2) 2kV Operating Ratings (Note 1) Power Dissipation Internally Limited Storage Temperature Range −65˚C to +150˚C PVIN to GND 150˚C AVIN to GND Maximum Junction Temp. 1.5V to 5.5V 3.0V to 5.5V Junction Temperature −40˚C to +125˚C Electrical Characteristics Specifications with standard typeface are for TJ = 25˚C, and those in bold face type apply over the full Junction Temperature Range (−40˚C to 125˚C). Minimum and Maximum limits are guaranteed through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25˚C and are provided for reference purposes only. Unless otherwise specified AVIN = PVIN = 5V. Symbol Parameter Conditions Min Typ Max VOUT = 0.8V option 0.782 0.8 0.818 VOUT = 1.0V option 0.9775 1.0 1.0225 VOUT = 1.2V option 1.1730 1.2 1.227 Units SYSTEM PARAMETERS VOUT ∆VOUT/∆AVIN Voltage Tolerance (Note 3) Line Regulation (Note 3) VOUT = 1.5V option 1.4663 1.5 1.5337 VOUT = 1.8V option 1.7595 1.8 1.8405 VOUT = 2.5V option 2.4437 2.5 2.5563 VOUT = 3.0V option 2.9325 3.0 3.0675 VOUT = 3.3V option 3.2257 V 3.3 3.3743 VOUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V or 2.5V 3.0V ≤ AVIN ≤ 5.5V 0.2 1.1 % VOUT = 3.0V or 3.3V 3.5V ≤ AVIN ≤ 5.5V 0.2 1.1 % ∆VOUT/∆IO Load Regulation Normal operation VON UVLO Threshold (AVIN) Rising Falling Hysteresis RDS(ON)-P PFET On Resistance Isw = 3A RDS(ON)-N NFET On Resistance Isw = 3A RSS Soft-Start Resistance ICL Peak Current Limit Threshold IQ Operating Current Non-switching ISD Shutdown Quiescent Current EN = 0V RSNS Sense Pin Resistance 2 50 3.6 mV/A 2.47 3.0 V 155 260 mV 40 120 mΩ 32 100 mΩ 450 kΩ 5 A 0.85 2 12 50 432 mA µA kΩ PWM fosc Switching Frequency Drange Duty Cycle Range . 325 550 0 725 kHz 100 % ENABLE CONTROL (Note 4) VIH EN Pin Minimum High Input VIL EN Pin Maximum Low Input IEN EN Pin Pullup Current 75 % of AVIN 25 EN = 0V 1.5 3 % of AVIN µA www.national.com LM2853 Absolute Maximum Ratings (Note 1) LM2853 Electrical Characteristics Specifications with standard typeface are for TJ = 25˚C, and those in bold face type apply over the full Junction Temperature Range (−40˚C to 125˚C). Minimum and Maximum limits are guaranteed through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25˚C and are provided for reference purposes only. Unless otherwise specified AVIN = PVIN = 5V. (Continued) Symbol Parameter Conditions Min Typ Max Units THERMAL CONTROLS TSD Thermal Shutdown Threshold 165 ˚C TSD-HYS Hysteresis for Thermal Shutdown 10 ˚C 38 ˚C/W THERMAL RESISTANCE θJA Junction to Ambient MXA14A Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Range indicates conditions for which the device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test Method is per JESD22-AI14. Note 3: VOUT measured in a non-switching, closed-loop configuration at the SNS pin. Note 4: The enable pin is internally pulled up, so the LM2853 is automatically enabled unless an external enable voltage is applied. www.national.com 4 Unless otherwise specified, the following conditions apply: VIN = AVIN = PVIN = 5V, TJ = 25˚C. Efficiency vs. ILOAD VOUT = 1.8V NFET RDS(ON) vs. Temperature 20201507 20201505 Efficiency vs. ILOAD VOUT = 2.5V PFET RDS(ON) vs. Temperature 20201509 20201504 Efficiency vs. ILOAD VOUT = 3.3V Switching Frequency vs. Temperature 20201508 20201506 5 www.national.com LM2853 Typical Performance Characteristics LM2853 Typical Performance Characteristics Unless otherwise specified, the following conditions apply: VIN = AVIN = PVIN = 5V, TJ = 25˚C. (Continued) IQ vs. VIN and Temperature ISD vs. VIN and Temperature 20201510 www.national.com 20201511 6 LM2853 Block Diagram 20201512 Applications Information load regulation and transient performance, the use of a small 1 µF ceramic capacitor is also recommended as a local bypass for the AVIN pin. The LM2853 is a DC-DC buck regulator belonging to National Semiconductor’s synchronous SIMPLE SWITCHER ® family. Integration of the PWM controller, power switches and compensation network greatly reduces the component count required to implement a switching power supply. A typical application requires only four components: an input capacitor, a soft-start capacitor, an output filter capacitor and an output filter inductor. SOFT-START CAPACITOR (CSS) The DAC that sets the reference voltage of the error amplifier sources a current through a resistor to set the reference voltage. The reference voltage is one half of the output voltage of the switcher due to the 200 kΩ divider connected to the SNS pin. Upon start-up, the output voltage of the switcher tracks the reference voltage with a two to one ratio as the DAC current charges the capacitance connected to the reference voltage node. Internal capacitance of 20 pF is permanently attached to the reference voltage node which is also connected to the soft start pin, SS. Adding a soft-start capacitor externally increases the time it takes for the output voltage to reach its final level. The charging time required for the reference voltage can be estimated using the RC time constant of the DAC resistor and the capacitance connected to the SS pin. Three RC time constant periods are needed for the reference voltage to reach 95% of its final value. The actual start up time will vary with differences in the DAC resistance and higher-order effects. If little or no soft-start capacitance is connected, then the start up time may be determined by the time required for the current limit current to charge the output filter capacitance. The capacitor charging equation I = C∆V/∆t can be used to estimate the start-up time in this case. For example, a part with a 3V output, a 100 µF output capacitance and a 5A current limit threshold would require a time of 60 µs: INPUT CAPACITOR (CIN) Fast switching of large currents in the buck converter places a heavy demand on the voltage source supplying PVIN. The input capacitor, CIN, supplies extra charge when the switcher needs to draw a burst of current from the supply. The RMS current rating and the voltage rating of the CIN capacitor are therefore important in the selection of CIN. The RMS current specification can be approximated by: where D is the duty cycle, VOUT/VIN. CIN also provides filtering of the supply. Trace resistance and inductance degrade the benefits of the input capacitor, so CIN should be placed very close to PVIN in the layout. A 22 µF or 47 µF ceramic capacitor is typically sufficient for CIN. In parallel with the large input capacitance a smaller capacitor should be added such as a 1 µF ceramic for higher frequency filtering. Ceramic capacitors with high quality dielectrics such as X5R or X7R should be used to provide a constant capacitance across temperature and line variations. For improved 7 www.national.com LM2853 Applications Information voltage the output reached during the short circuit event. The range of soft-start capacitors is therefore restricted to values 1 nF to 50 nF. (Continued) COMPENSATION The LM2853 provides a highly integrated solution to power supply design. The compensation of the LM2853, which is type-three, is included on-chip. The benefit of integrated compensation is straight-forward, simple power supply design. Since the output filter capacitor and inductor values impact the compensation of the control loop, the range of LO, CO and CESR values is restricted in order to ensure stability. Since it is undesirable for the power supply to start up in current limit, a soft-start capacitor must be chosen to force the LM2853 to start up in a more controlled fashion based on the charging of the soft-start capacitance. In this example, suppose a 3 ms start time is desired. Three time constants are required for charging the soft-start capacitor to 95% of the final reference voltage. So in this case RC = 1 ms. The DAC resistor, R, is 450 kΩ so C can be calculated to be 2.2 nF. A 2.2 nF ceramic capacitor can be chosen to yield approximately a 3 ms start-up time. OUTPUT FILTER VALUES Table 1 details the recommended inductor and capacitor ranges for the LM2853 that are suggested for various typical output voltages. Values slightly different than those recommended may be used, however the phase margin of the power supply may be degraded. For best performance when output voltage ripple is a concern, ESR values near the minimum of the recommended range should be paired with capacitance values near the maximum. If a minimum output voltage ripple solution from a 5V input voltage is desired, a 6.8 µH inductor can be paired with a 220 µF (50 mΩ) capacitor without degraded phase margin. SOFT-START CAPACITOR (CSS) AND FAULT CONDITIONS Various fault conditions such as short circuit and UVLO of the LM2853 activate internal circuitry designed to control the voltage on the soft-start capacitor. For example, during a short circuit current limit event, the output voltage typically falls to a low voltage. During this time, the soft-start voltage is forced to track the output so that once the short is removed, the LM2853 can restart gracefully from whatever TABLE 1. Recommended LO and CO Values LO (µH) CO (µF) CESR (mΩ) VOUT (V) VIN (V) Min Max Min Max Min Max 0.8 5 4.7 6.8 120 220 70 100 0.8 3.3 4.7 4.7 150 220 50 100 1 5 4.7 6.8 120 220 70 100 1 3.3 4.7 4.7 150 220 50 100 1.2 5 4.7 6.8 120 220 70 100 1.2 3.3 4.7 4.7 120 220 60 100 1.5 5 4.7 6.8 120 220 70 100 1.5 3.3 4.7 4.7 120 220 60 100 1.8 5 4.7 6.8 120 220 70 120 1.8 3.3 4.7 4.7 100 220 70 120 2.5 5 4.7 6.8 120 220 70 150 2.5 3.3 4.7 4.7 100 220 80 150 3.0 5 4.7 6.8 120 220 70 150 3.0 3.3 4.7 4.7 100 220 80 150 3.3 5 4.7 6.8 120 220 70 150 www.national.com 8 LM2853 Applications Information (Continued) CHOOSING AN INDUCTANCE VALUE The current ripple present in the output filter inductor is determined by the input voltage, output voltage, switching frequency and inductance according to the following equation: The maximum inductor current for a 3A load would therefore be 3A plus 177 mA, 3.177A. As shown in the ripple equation, the current ripple is inversely proportional to inductance. OUTPUT FILTER INDUCTORS Once the inductance value is chosen, the key parameter for selecting the output filter inductor is its saturation current (ISAT) specification. Typically ISAT is given by the manufacturer as the current at which the inductance of the coil falls to a certain percentage of the nominal inductance. The ISAT of an inductor used in an application should be greater than the maximum expected inductor current to avoid saturation. Below is a table of inductors that are suitable in LM2853 applications. where ∆IL is the peak to peak current ripple, D is the duty cycle VOUT/VIN, VIN is the input voltage applied to the output stage, VOUT is the output voltage of the switcher, f is the switching frequency and LO is the inductance of the output filter inductor. Knowing the current ripple is important for inductor selection since the peak current through the inductor is the load current plus one half the ripple current. Care must be taken to ensure the peak inductor current does not reach a level high enough to trip the current limit circuitry of the LM2853. As an example, consider a 5V to 1.2V conversion and a 550 kHz switching frequency. According to Table 1, a 4.7 µH inductor may be used. Calculating the expected peak-to-peak ripple, TABLE 2. Recommended Inductors Inductance Part Number Vendor 4.7 µF DO3308P-472ML Coilcraft 4.7 µF DO3316P-472ML Coilcraft 4.7 µF MSS1260-472ML Coilcraft 5.2 µF MSS1038-522NL Coilcraft 5.6 µF MSS1260-562ML Coilcraft 6.8 µF DO3316P-682ML Coilcraft 6.8 µF MSS1260-682ML Coilcraft OUTPUT FILTER CAPACITORS The recommended capacitors that may be used in the output filter with the LM2853 are limited in value and ESR range according to Table 1. Below are some examples of capacitors that can typically be used in an LM2853 application. TABLE 3. Recommended Capacitors Capacitance (µF) Part Number Chemistry Vendor 100 594D107X_010C2T Tantalum Vishay-Sprague 100 593D107X_010D2_E3 Tantalum Vishay-Sprague 100 TPSC107M006#0075 Tantalum AVX 100 NOSD107M006#0080 Niobium Oxide AVX 100 NOSC107M004#0070 Niobium Oxide AVX 120 594D127X_6R3C2T Tantalum Vishay-Sprague 150 594D157X_010C2T Tantalum Vishay-Sprague 150 595D157X_010D2T Tantalum Vishay-Sprague 150 591D157X_6R3C2_20H Tantalum Vishay-Sprague 150 TPSD157M006#0050 Tantalum AVX AVX 150 TPSC157M004#0070 Tantalum 150 NOSD157M006#0070 Niobium Oxide AVX 220 594D227X_6R3D2T Tantalum Vishay-Sprague 220 591D227X_6R3D2_20H Tantalum Vishay-Sprague 220 591D227X_010D2_20H Tantalum Vishay-Sprague 220 593D227X_6R3D2_E3 Tantalum Vishay-Sprague 9 www.national.com LM2853 Applications Information (Continued) TABLE 3. Recommended Capacitors (Continued) Capacitance (µF) Part Number Chemistry 220 TPSD227M006#0050 Tantalum AVX 220 NOSD227M0040060 Niobium Oxide AVX SPLIT-RAIL OPERATION Vendor components need to be chosen based on the value of PVIN. For PVIN levels lower than 3.3V, use output filter component values recommended for 3.3V. PVIN must always be equal to or less than AVIN. The LM2853 can be powered using two separate voltages for AVIN and PVIN. AVIN is the supply for the control logic; PVIN is the supply for the power FETs. The output filter 20201513 SWITCH NODE PROTECTION The LM2853 includes protection circuitry that monitors the voltage on the switch pin. Under certain fault conditions, switching is disabled in order to protect the switching devices. One side effect of the protection circuitry may be observed when power to the LM2853 is applied with no or light load on the output. The output will regulate to the rated voltage, but no switching may be observed. As soon as the output is loaded, the LM2853 will begin normal switching operation. tween all ground connections. 3. The sense pin connection should be made as close to the load as possible so that the voltage at the load is the expected regulated value. The sense line should not run too close to nodes with high dV/dt or dl/dt (such as the switch node) to minimize interference. 4. The switch node connections should be low resistance to reduce power losses. Low resistance means the trace between the switch pin and the inductor should be wide. However, the area of the switch node should not be too large since EMI increases with greater area. So connect the inductor to the switch pin with a short, but wide trace. Other high current connections in the application such as PVIN and VOUT assume the same trade off between low resistance and EMI. LAYOUT GUIDELINES These are several guidelines to follow while designing the PCB layout for an LM2853 application. 1. The input bulk capacitor, CIN, should be placed very close to the PVIN pin to keep the resistance as low as possible between the capacitor and the pin. High current levels will be present in this connection. 2. All ground connections must be tied together. Use a broad ground plane, for example a completely filled back plane, to establish the lowest resistance possible be- 5. Allow area under the chip to solder the entire exposed die attach pad to ground for improved thermal performance. Lab measurements also show improved regulation performance when the exposed pad is well grounded. LM2853 Example Circuit Schematic 20201514 FIGURE 1. www.national.com 10 LM2853 LM2853 Example Circuit Schematic (Continued) Bill of Materials for 5V to 3.3V Conversion ID Part Number Type Size Parameters Qty U1 LM2853MH-3.3 3A Buck ETSSOP-14 3.3V 1 Vendor NSC CIN GRM31CR60J476ME19 Capacitor 1206 47 µF 1 Murata CBYP GRM21BR71C105KA01 Capacitor 0805 1 µF 1 Murata CSS VJ0805Y222KXXA Capacitor 0603 2.2 nF 1 Vishay-Vitramon LO DO3316P-682 Inductor DO3316P 6.8 µH 1 Coilcraft CO 594D127X06R3C2T Capacitor C Case 120µF (85mΩ) 1 Vishay-Sprague Bill of Materials for 3.3V to 1.2V Conversion ID Part Number Type Size Parameters Qty Vendor U1 LM2853MH-1.2 3A Buck ETSSOP-14 1.2V 1 NSC CIN GRM31CR60J476ME19 Capacitor 1206 47 µF 1 Murata CBYP GRM21BR71C105KA01 Capacitor 0805 1 µF 1 Murata CSS VJ0805Y222KXXA Capacitor 0603 2.2 nF 1 Vishay-Vitramon LO DO3316P-472 Inductor DO3316P 4.7 µH 1 Coilcraft CO NOSD157M006R0070 Capacitor D Case 150 µF (70 mΩ) 1 AVX 11 www.national.com PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2015 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LM2853MH-1.0/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.0 LM2853MH-1.2/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.2 LM2853MH-1.5/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.5 LM2853MH-1.8/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.8 LM2853MH-2.5/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -2.5 LM2853MH-3.0/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -3.0 LM2853MH-3.3 NRND HTSSOP PWP 14 TBD Call TI Call TI -40 to 125 LM2853 -3.3 LM2853MH-3.3/NOPB ACTIVE HTSSOP PWP 14 94 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -3.3 LM2853MHX-1.0/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.0 LM2853MHX-1.2/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.2 LM2853MHX-1.5/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.5 LM2853MHX-1.8/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -1.8 LM2853MHX-2.5/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -2.5 LM2853MHX-3.3/NOPB ACTIVE HTSSOP PWP 14 2500 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LM2853 -3.3 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2015 (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM2853MHX-1.0/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LM2853MHX-1.2/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LM2853MHX-1.5/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LM2853MHX-1.8/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LM2853MHX-2.5/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 LM2853MHX-3.3/NOPB HTSSOP PWP 14 2500 330.0 12.4 6.95 5.6 1.6 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM2853MHX-1.0/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM2853MHX-1.2/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM2853MHX-1.5/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM2853MHX-1.8/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM2853MHX-2.5/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 LM2853MHX-3.3/NOPB HTSSOP PWP 14 2500 367.0 367.0 35.0 Pack Materials-Page 2 MECHANICAL DATA PWP0014A MXA14A (Rev A) www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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