XFL4020-222ME

SC284AQ SEMTECH | Alldatasheet

Document overview

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Technical content

Features

n VIN Range — 2.75 – 5.5V n VOUT Selectable — 1.0 - 3.3V n Up to1.7A Output Current for Each Channel n Package with Ultra-Small Footprint : 3 x 3 x 0.75(mm) n Switching Frequency — 2.5MHz n Effi ciency Up to 94% n Low Output Noise in CCM n Excellent Transient Response n Start Up into Pre-Biased Output n 100% Duty-Cycle Low Dropout Operation n Shutdown Current — <1µA n Internal Soft-Start n Input Under-Voltage Lockout n Output Over-Voltage, Current Limit Protection n Over-Temperature Protection n VOUT Further Adjustable Using External Resistors n PGOOD Feature n Lead-free, Halogen-free, and RoHS/WEEE Comp liant n AEC-Q100 (Grade-2) Quali/f_i ed, See Derating Curve on Page 15 for Application Information.

Applications

n Automotive Car Navigation/Infotainment

Description

The SC284AQ is a dual channel 1.7A synchronous step- down regulator designed to operate with an input voltage range of 2.75 to 5.5 Volts. Each channel off ers seven pre-determined output voltages via three control pins programmable from 1.0 to 3.3 Volts. The control pins allow for on-the-/f_l y voltage changes, enabling system designers to implement dynamic power savings. The SC284AQ is also capable of adjusting the output voltage via an external resistor divider. The SC284AQ is optimized for maximum effi ciency over a wide range of load currents. The device operates in PWM mode with /f_i xed 2.5MHz oscillator frequency, allowing the use of small surface mount external components. Connecting CTL0 — CTL2 to logic low forces the device into shutdown mode reducing the supply current to less than 1µA. Connecting any of the control pins to logic high enables the converter and sets the output voltage according to Table 1. Other features include under- voltage lockout, soft-start to limit inrush current, and over-temperature protection. Typical Application Circuit Revision 2.2

Pin Con/f_i guration Ordering Information Device Package SC284AQWLTRT (1)(2) 3 x 3 x 0.75(mm) MLPQ-W20 SC284AQEVB Evaluation Board Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Available in lead-free package only. Device is fully WEEE and RoHS compliant and halogen-free. Table 1 – Output Voltage Settings CTL2[A/B] CTL1[A/B] CTL0[A/B] Output Voltage 0 0 0 Disabled 0 0 1 1.0V 0 1 0 1.1V 0 1 1 1.2V 1 0 0 1.5V 1 0 1 1.8V 1 1 0 2.5V 1 1 1 3.3V 3 x 3 x 0.75(mm) MLPQ-W20 θJA = 40°C/W Marking Information 284AQ = Part Number Code yyww = Date Code xxxx = Semtech Lot Number

Electrical Characteristics

Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the parameters speci/f_i ed in the Electrical Characteristics section is not recommended. Notes: (1) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. (2) Tested according to JEDEC standard JS-001-2012. Unless speci/f_i ed: VINA= VINB= 5.0V, VOUTA= VOUTB= 1.5V, C INA= C INB=10µF, C OUTA=C OUTB= 22µF, L= 2.2µH, -40°C ≤ T J ≤ +125 °C. Unless otherwise noted typical values are T A= +25 °C. Parameter Symbol Conditions Min Typ Max Units Input Voltage Range VINA/B 2.75 5.5 V Under-Voltage Lockout V UVLO Rising VINA ,VINB 2.55 2.65 2.75 V Hysteresis 200 mV Quiescent Current I Q Channel A & B, PWM mode excluding IOUT, per channel 6.6 mA Shutdown Current I SHDN CTL 0-2= GND, Per channel 1 10 µA Soft-Start Time t SS Channel A & B; IOUT= 1.8A, VOUT =90% of /f_i nal value 1700 µs Output Voltage Range V OUT 1.0 3.3 V Output Voltage Tolerance (1) ΔV OUT Channel A & B -3.0 +3.0 % CTL Settings Regulation ΔV CTL-REG Channel A & B; Relative to V OUT at CTL=100 ±1 % Line Regulation ΔV LINE-REG Channel A & B; VIN = 2.75 – 5.5V ±0.2 %/V Load Regulation ΔV LOAD-REG Channel A & B; VIN = 5.0V; IOUT=0mA – 1.8A ±1 %/A Current Limit Threshold I LIMIT Channel A & B; Peak LX current; Open loop DC Test 2.2 3.0 3.9 A Oscillator Frequency f OSC Channel A & B 2.0 2.5 3.0 MHz Absolute Maximum Ratings Recommended Operating Conditions Thermal Information Thermal Resistance, Junction to Ambient (1) (°C/W) . . . . 40

Parameter Symbol Conditions Min Typ Max Units LX Leakage Current (2) IleakLX Channel A & B; VIN = 5.5V; LX = 0V; CTL 0-2= GND µA Channel A & B; VIN = 5.5V; LX = 5.0V; CTL 0-2= GND Foldback Holding Current I CL_HOLD Average LX Current 600 mA High Side Switch Resistance (3) RDSON_P Channel A & B; ILX = 100mA, TJ= 25 °C 116 mΩ Low Side Switch Resistance R DSON_N Channel A & B; ILX = -100mA, TJ= 25 °C 103 CTLx Input Current (2) ICTLx_iN Channel A & B; CTL 0-2=VIN or GND CTLx Input High Threshold V CTLx_HI Channel A & B 1.7 V CTLx Input Low Threshold V CTLx_LO Channel A & B 0.4 V Impedence of PGOOD Low R PGOOD_LO Channel A & B 8 Ω PGOOD Threshold V PG_TH VOUT rising 90 % PGOOD Delay t PG_DLY Asserted 2 ms PGOOD= Low 20 μs PGOOD High-Level Output Leakage I OH-PG VPG =5V 0.05 μA VOUT Over Voltage Protection V OVP Channel A & B 115 % Thermal Shutdown Temperature (4) TSD Channel A & B 160 °C Thermal Shutdown Hysteresis (4) TSD_HYS Channel A & B 10 °C Electrical Characteristics (continued) Notes: (1) The “Output Voltage Tolerance” includes output voltage accuracy, voltage drift over temperature. (2) A negative current means the current /f_l ows from the pin and a positive current means the current /f_l ows into the pin. (3) Measured from VINA/B to LX A/B. (4) Thermal shutdown protection is independent for each channel.

Effi ciency vs. Load Current Total Loss (Per Channel) vs. Load Current UVLO Rising Threshold Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (Coilcraft: XFL4020-222ME). UVLO Hysteresis 2.60 2.62 2.64 2.66 2.68 2.70 -50 -25 0 25 50 75 100 125 150 Input Voltage (V) Ambient Temperature ( 0C) 170 175 180 185 190 195 200 -50 -25 0 25 50 75 100 125 150 UVLO Hysteresis (mV) Ambient Temperature ( 0C) Steady State (PWM) Operation ( IOUT=200mA) Steady State (PWM) Operation (I OUT=2A) IOUT 200mA/div 500ns/divVIN = 5V VOUT = 1.5V ILX 500mA/div 500ns/divVIN = 5V VLX 2V/div VOUT = 1.5V IOUT 2A/div ILX 1A/div VLX 2V/div

Load Regulation, Vout=1.0V Load Regulation, Vout=1.2V Load Regulation, Vout=1.5V Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (Coilcraft: XFL4020-222ME). Load Regulation, Vout=1.8V Load Regulation, Vout=2.5V Load Regulation, Vout=3.3V

Line Regulation, Vout=1.0V, Iout=500mA Line Regulation, Vout=1.2V, Iout=500mA Line Regulation, Vout=1.5V, Iout=500mA Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (Coilcraft: XFL4020-222ME). Line Regulation, Vout=1.8V, Iout=500mA 125 0C 25 0C -40 0C 0.95 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 1.05 Output Voltage (V) Input Voltage (V) 1.14 1.16 1.18 1.20 1.22 1.24 1.26 Output Voltage (V) Inout Voltage (V) 125 0C 25 0C -40 0C 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 Output Voltage (V) Input Voltage (V) 125 0C 25 0C -40 0C 1.71 1.73 1.75 1.77 1.79 1.81 1.83 1.85 1.87 1.89 Output Voltage (V) Input Voltage (V) 125 0C 25 0C -40 0C Line Regulation, Vout=2.5V, Iout=500mA Line Regulation, Vout=3.3V, Iout = 500mA 2.38 2.42 2.46 2.50 2.54 2.58 2.62 Output Voltage (V) Input Voltage (V) 125 0C 25 0C -40 0C 125 0C 25 0C -40 0C 3.14 3.18 3.22 3.26 3.30 3.34 3.38 3.42 3.46 Output Voltage (V) Input Voltage (V)

Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, L= 2.2uH (Coilcraft: XFL4020-222ME). 50us/divVIN = 5V IOUT = 0.4A to 2A 50us/divVIN = 5V IOUT = 0.4A to 2A Shutdown (Disable)(VOUT=1.5V) Start Up (Power up V IN =V CTLx ) (VOUT=3.3V) VIN 2V/div 200us/divVIN = 5V IOUT = 2A VOUT 1V/div 200us/divVIN = 5V IOUT = 2A VOUT 1V/div VIN 5V/div 50us/divVIN = 5V ROUT = 1.65Ω(2A) VCTL 2V/div VOUT 1V/div Start Up (Enable) (VOUT=3.3V) VIN 5V/div Start Up (Power up V IN =V CTLx ) (VOUT=1.5V) Start Up (Enable) (VOUT=1.5V) Shutdown (Disable)(VOUT=3.3V) VIN 5V/div VCTL 2V/div VOUT 1V/div VCTL 2V/div VOUT 1V/div VIN 5V/div VCTL 2V/div VIN 2V/div VOUT 1V/div

Switching Frequency Vs Temperature, Vout=1.0V Switching Frequency Vs Temperature, Vout=1.2V Switching Frequency Vs Temperature, Vout=1.5V Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (Coilcraft: XFL4020-222ME). Switching Frequency Vs Temperature, Vout=1.8V 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C) 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C) 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C) 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C) Switching Frequency Vs Temperature, Vout=2.5V Switching Frequency vs Temperature, Vout=3.3V 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C) 2.535 2.54 2.545 2.55 2.555 2.56 2.565 2.57 2.575 -40 -15 10 35 60 85 110 135 Switching Frequency (MHz) Ambient Temperature ( 0C)

Switching Frequency Vs Input Voltage, Vout=1.0V Switching Frequency Vs Input Voltage, Vout=1.2V Switching Frequency Vs Input Voltage, Vout=1.5V Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, Unless otherwise noted, L= 2.2uH (Coilcraft: XFL4020-222ME). Switching Frequency Vs Input Voltage, Vout=1.8V 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V) 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V) 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V) 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V) Switching Frequency Vs Input Voltage, Vout=2.5V Switching Frequency vs Input Voltage, Vout=3.3V 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V) 2.45 2.5 2.55 2.6 2.65 2.5 3 3.5 4 4.5 5 5.5 Switching Frequency (MHz) Input Voltage (V)

Circuit Conditions: C IN = 10uF/6.3V; COUT= 22uF/6.3V, L= 2.2uH (Coilcraft: XFL4020-222ME). VOUT 50mV/div 20us/divVIN = 5V IOUT = 0.1A to 0.4A IOUT VOUT 100mV/div 20us/divVIN = 5V IOUT = 0.4A to 1.8A IOUT 1A/div Output Hard Short (VOUT=1.5V) 20us/divVIN = 5V IOUT = 2A 20us/divVIN = 5V IOUT = 2A VOUT 100mV/div VOUT 1V/div 50us/divVIN = 5V IOUT = 500mA ILX 1A/div Transient Response (Vout=1.5V, Iout=0.1A to 0.4A) Output Voltage Ripple (VOUT=1.5V) ILX 200mA/div 200mA/div ILX 1A/div Transient Response (Vout=1.5V, Iout=0.4A to 2A) IOUT 1A/div ILX 1A/div VOUT 50mV/div IOUT 50mA/div ILX 200mA/div 1us/div VOUT 20mV/div VIN = 5V IOUT = 500mA

Pin # Pin Name Pin Function 1 PVINA Channel A — Input supply voltage for the converter power stage and internal circuitry. 2 AGNDA Ground connection for internal circuitry — connect directly to PGNDA.

3 AVINA Power supply for internal circuitry —

must be connected to PVINA using an R-C /f_i lter of 1Ω and 10nF. 4 PGOODA Power Good indicator for channel A. When the output voltage reaches the PGOODA threshold, this pin will be open drain (after the PGOOD delay), otherwise it is pulled low internally.

5 CTL0A

Channel A — Control bit 0, see Table 1 for decoding. This pin has a 1 MΩ internal pull-down resistor. This resis- tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout.

6 CTL1A

Channel A — Control bit 1, see Table 1 for decoding. This pin has a 1 MΩ internal pull-down resistor. This resis- tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout. CTL2A Channel A — Control bit 2, see Table 1 for decoding. This pin has a 1 MΩ internal pull-down resistor. This resis- tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout.

8 VOUTB Output voltage sense pin of Channel B

9 PGNDB Channel B — Ground connection for converter power stage and internal circuitry. 10 LXB Switching node of Channel B — connect an inductor between this pin and the output capacitor. 11 PVINB Channel B — Input supply voltage for the converter power stage and internal circuitry. 12 AGNDB Ground connection for internal circuitry — connect directly to PGNDB.

13 AVINB Power supply for internal circuitry —

must be connected to PVINB using an R-C /f_i lter of 1Ω and 10nF. 14 PGOODB Power Good indicator for channel B. When the output voltage reaches the PGOODB threshold, this pin will be open drain (after the PGOOD delay), otherwise it is pulled low internally.

15 CTL0B

Channel B — Control bit 0, see Table 1 for decoding. This pin has a 1 MΩ internal pulld-own resistor. This resis- tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout.

16 CTL1B

Channel B — Control bit 1 - see Table 1 for decoding. This pin has a 1 MΩ internal pull-down resistor. This resistor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout. CTL2B Channel B — Control bit 2, see Table 1 for decoding. This pin has a 1 MΩ internal pull-down resistor. This resis- tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in under-voltage lockout.

18 VOUTA Output voltage sense pin of Channel A

19 PGNDA Channel A — Ground connection for converter power stage and internal circuitry. 20 LXA Switching node of Channel A — connect an inductor between this pin and the output capacitor. PAD Thermal pad for heatsinking purposes.

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Applications Information (continued) stepped through four soft-start levels o f approximately 20%, 25%, 40%, & 100%. Each step is maintained for 400μs following an internal reference start up duration of 100μs giving a total nominal startup period of 1700μs. D uring startup, the chip operates by controlling the induc tor current swings between 0A and current limit. If at any time VOUT reaches 86% of the target or at the end of the sof t- start period, the SC284AQ will switch to PWM mode operation. The SC284AQ is capable of starting up into a pre-biased output. Shut Down When all CTL pins of a channel are low, the corresponding channel will be disabled, drawing less than 1μA from that input power supply. The internal switches and bandgap voltage will be immediately turned off . Thermal Shutdown The device has a thermal shutdown feature to protect the SC284AQ if the junction temperature exceeds 160°C. During thermal shutdown, the on-chip power devices are disabled, tri-stating the LX output. When the temperature drops by 10°C, it will initiate a soft-start cycle to resume normal operation. Inductor Selection The SC284AQ converter has internal loop compensation. The compensation is designed to work with an output /f_i lter corner frequency of less than 40kHz for a V IN of 5V and 50KHz for a V IN of 3.3V over any operating condition. The corner frequency of the output /f_i lter is shown in the following equation. Values outside this range may lead to instability, malfunc- tion, or out-of-speci/f_i cation performance. In general, the inductance is chosen by making the inductor ripple current to be less than 30% of maximum load current. When choosing an inductor, it is important to consider the change in inductance with DC bias current. The inductor saturation current is speci/f_i ed as the current at which the inductance drops a speci/f_i c percentage from the nominal value. This is approximately 30%. Except for short-circuit or other fault conditions, the peak current must always be less than the saturation current speci/f_i ed by the manufacturer. The peak current is the maximum load current plus one half of the inductor ripple current at the maximum input voltage. Load and/or line transients can cause the peak current to exceed this level for short durations. Maintaining the peak current below the inductor saturation speci/f_i cation keeps the inductor ripple current and the output voltage ripple at acceptable levels. Manufacturers often provide graphs of actual inductance and saturation characteristics versus applied inductor current. The saturation characteristics of the inductor can vary signi/f_i cantly with core temperature. Core and ambient temperatures should be considered when examining the core saturation characteristics. When the inductance has been determined, the DC resistance (DCR) must be examined. The effi ciency that can be achieved is dependent upon the DCR of the inductor. Lower values give higher effi ciency. The RMS DC current rating of the inductor is associated with losses in the copper windings and the resulting temperature rise of the inductor. This is usually speci/f_i ed as the current which produces a 40˚C temperature rise. Most copper windings are rated to accommodate this temperature rise above maximum ambient. Magnetic /f_i elds associated with the output inductor can interfere with nearby circuitry. This can be minimized by the use of low noise shielded inductors which use the minimum gap possible to limit the distance that magnetic /f_i elds can radiate from the inductor. However shielded inductors typically have a higher DCR and are thus less effi cient than a similarly sized non-shielded inductor. Final inductor selection depends upon various desig n considerations such as effi ciency, EMI, size, and cost. Table 2 lists the manufacturers of recommended inductor options. The saturation characteristics and DC curr ent ratings are also shown.

Applications Information (continued) Manufacturer Part Number L (μH) DCR Max (Ω) Rated Current (A) L at Rated Current (μH) Dimen- sions LxWxH (mm) Coilcraft XFL4020-222ME Automotive Grade TOKO TOKO Panasonic Table 2 – Recommended Inductors COUT Selection The internal voltage loop compensation in the SC284AQ limits the minimum output capacitor value to 22µF if using a 2.2µH inductor or 44µF if using a 1µH inductor. This is due to its in/f_l uence on the the loop crossover frequency, phase margin, and gain margin. The total output capacitance should not exceed 50µF to avoid any start-up problems. For most typical applications it is recommended to use an output capacitance of 22µF to 44µF. When choosing the output capacitor’s capacitance, verify the voltage derating eff ect from the capacitor vendor’s data sheet. Capacitors with X7R or X5R ceramic dielectric are recommended for their low ESR and superior temperature and voltage characteristics. Y5V capacitors should not be used as their temperature coeffi cients make them unsuitable for this application. The output voltage droop due to a load transient is determined by the capacitance of the ceramic output capacitor. The ceramic capacitor supplies the load current initially until the loop responds. Within a few switching cycles the loop will respond and the inductor current will increase to match the required load. The output voltage droop during the period prior to the loop responding can be related to the choice of output capacitor by the relationship from the following equation. The output capacitor RMS ripple current may be calculated from the following equation. Table 3 lists the manufac turers of recommended capacitor options. Manufacturer Part Nunber Value (μF) Type Rated Voltage (VDC) Value at 3.3V (μF) Dimensions LxWxH (mm) Murata (EIA:0805) Murata (EIA:0805) Murata (EIA:0805) Murata (EIA:1206) Murata (EIA:1206) Table 3 – Recommended Capacitors CIN Selection The SC284AQ source input current is a DC supply current with a triangular ripple imposed on it. To prevent large input voltage ripple, a low ESR ceramic capacitor i s required. A minimum value of 10μF should be used. It is important to consider the DC voltage coeffi cient charac- teristics when determining the actual required valu e. It should be noted a 10µF, 6.3V, X5R ceramic capacitor with 5V DC applied may exhibit a capacitance as low as 4.05µF. To estimate the required input capacitor, determine the acceptable input ripple voltage and calculate the minimum value required for C IN as shown by the following equation. The input capacitor RMS ripple current varies with the input and output voltage. The maximum input capacitor RMS current is found from the next equation .

Applications Information (continued) The input voltage ripple and RMS current ripple are at a maximum when the input voltage is twice the output voltage or 50% duty cycle. The input capacitor provides a low impedance loop f or the edges of pulsed current drawn by the PMOS switc h. Low ESR/ESL X5R ceramic capacitors are recommended for this function. To minimize stray inductance, the capaci- tor should be placed as close as possible to the VI N and GND pins of the SC284AQ.

Applications Information (continued) Figure 5 — Current Limit Protection

Applications Information (continued) Figure 6 — Soft Start Operation

Outline Drawing – 3x3 MLPQ-W Land Pattern – 3x3 MLPQ-W

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Phone: (805) 498-2111 Fax: (805) 498-3804 www.semtech.com Contact Information SC284AQ © Semtech 2016 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the speci/f_i ed maximum ratings or operation outside the speci/f_i ed range. SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF SEMTECH PRODUCTS IN SUCH AP- PLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its offi cers, em- ployees, subsidiaries, affi liates, and distributors harmless against all claims, costs damages and attorney fees which could arise.