AAT1147IJS-0.6-T1

AAT1147 ANALOGICTECH | Alldatasheet

Document overview

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Technical content

Features

• V IN Range: 2.7V to 5.5V
• V OUT Adjustable from 0.6V to VIN
• 400mA Output Current
• Up to 98% Efficiency
• Low Noise, 1.4MHz Fixed Frequency PWM Operation
• Fast Load Transient
• 150µs Soft Start
• Over-Temperature and Current Limit Protection
• 100% Duty Cycle Low Dropout Operation
• <1µA Shutdown Current
• 8-Pin SC70JW Package
• Temperature Range: -40°C to +85°C

Applications

• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor/DSP Core /IO Power
• PDAs and Handheld Computers
• USB devices Typical Application 4.7μH 118k 4.7μF 59k 4.7μF EN OUT VIN LX AGND PGND PGND PGND AAT1147 VIN VO = 1.8V

(Top View) OUT VIN LX PGND PGND PGND AGND EN 1 Pin # Symbol Function 1 EN Enable pin. 2 OUT Feedback input pin. This pin is connected to an external resistive divider for an adjustable output. 3 VIN Input supply voltage for the converter. 4 LX Switching node. Connect the inductor to this pin. It is connected internally to the drain of both high- and low-side MOSFETs. 5 AGND Non-power signal ground pin. 6, 7, 8 PGND Main power ground return pins. Connect to the output and input capacitor return. AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 2 1147.2006.05.1.0

Symbol Description Value Units PD Maximum Power Dissipation3 0.625 W θJA Thermal Resistance 160 °C/W Symbol Description Value Units VIN Input Voltage to GND 6.0 V VLX LX to GND -0.3 to V IN + 0.3 V VOUT OUT to GND -0.3 to V IN + 0.3 V VEN EN to GND -0.3 to 6.0 V TJ Operating Junction Temperature Range -40 to 150 °C TLEAD Maximum Soldering Temperature (at leads, 10 sec) 300 °C AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 3 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3. Derate 6.25mW/°C above 25°C.

Electrical Characteristics1 TA = -40°C to +85°C, unless otherwise noted. Typical values are T A = 25°C, VIN = 3.6V. Symbol Description Conditions Min Typ Max Units Step-Down Converter VIN Input Voltage 2.7 5.5 V VIN Rising 2.7 V VUVLO UVLO Threshold Hysteresis 100 mV VIN Falling 1.8 V VOUT Output Voltage Tolerance IOUT = 0 to 400mA, -3.0 3.0 %VIN = 2.7V to 5.5V VOUT Output Voltage Range 0.6 V IN V IQ Quiescent Current No Load 160 300 µA ISHDN Shutdown Current EN = AGND = PGND 1.0 µA ILIM P-Channel Current Limit 600 mA RDS(ON)H High Side Switch On Resistance 0.45 Ω RDS(ON)L Low Side Switch On Resistance 0.40 Ω ILXLEAK LX Leakage Current VIN = 5.5V, VLX = 0 to VIN, 1µ AEN = GND ΔVLINEREG Line Regulation V IN = 2.7V to 5.5V 0.1 %/V VOUT Out Threshold Voltage Accuracy 0.6V Output, No Load, 591 600 609 mVTA = 25°C IOUT Out Leakage Current 0.6V Output 0.2 µA TS Start-Up Time From Enable to Output 150 µsRegulation FOSC Oscillator Frequency 1.0 1.4 2.0 MHz TSD Over-Temperature Shutdown 140 °C Threshold THYS Over-Temperature Shutdown 15 °C Hysteresis EN VEN(L) Enable Threshold Low 0.6 V VEN(H) Enable Threshold High 1.4 V IEN Input Low Current V IN = VOUT = 5.5V -1.0 1.0 µA AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 4 1147.2006.05.1.0 1. The AAT1147 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assu red by design, characterization, and correlation with statistical process controls.

(VOUT = 1.8V) Output Current (mA) Output Error (%) -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 0.1 1 10 100 1000 VIN = 3.6V VIN = 4.2V VIN = 3.0V Efficiency vs. Load (VOUT = 1.8V; L = 4.7µH) Output Current (mA) Efficiency (%) 100 1 10 100 1000 VIN = 3.0V VIN = 3.6V VIN = 4.2V DC Regulation (VOUT = 2.5V) Output Current (mA) Output Error (%) -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 0.1 1 10 100 1000 VIN = 5.0V VIN = 4.2V VIN = 3.6V Efficiency vs. Load (VOUT = 2.5V; L = 6.8µH) Output Current (mA) Efficiency (%) 100 1 10 100 1000 VIN = 3.6V VIN = 4.2V VIN = 5.0V DC Regulation (VOUT = 3.3V) Output Current (mA) Output Error (%) -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 0.1 1 10 100 1000 VIN = 3.6V VIN = 4.2V VIN = 5.0V Efficiency vs. Load (VOUT = 3.3V; L = 6.8µH) Output Current (mA) Efficiency (%) 100 1 10 100 100 0 VIN = 3.6V VIN = 4.2V VIN = 5.0V AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 5

Switching Frequency vs. Temperature (VIN = 3.6V; VOUT = 1.8V) Temperature (°°C) Variation (%) -15 -12 -40 -25 -10 5 20 35 50 65 80 95 Output Voltage Error vs. Temperature (VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA) Temperature (°°C) Output Error (%) -2.0 -1.5 -1.0 -0.5 0.00.51.0 1.5 2.0 -40 -25 -10 5 20 35 50 65 80 95 Frequency vs. Input Voltage Input Voltage (V) Frequency Variation (%) -4.0 -3.0-2.0-1.0 0.01.02.0 VOUT = 1.8V VOUT = 3.3VVOUT = 2.5V Line Regulation (VOUT = 1.8V) Input Voltage (V) Accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 IOUT = 400mA IOUT = 10mA IOUT = 1mA Line Regulation (VOUT = 2.5V) Input Voltage (V) Accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 IOUT = 400mA IOUT = 10mA IOUT = 1mA Line Regulation (VOUT = 3.3V) Input Voltage (V) Accuracy (%) -0.5 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.5 IOUT = 400mA IOUT = 10mA IOUT = 1mA AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 6 1147.2006.05.1.0

(VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA) Output Voltage (AC Coupled) (top) (mV) Inductor Current (bottom) (A) Time (500ns/div) -120 -100 -80 -60 -40 -20 0.1 0.2 0.3 0.4 0.5 0.60.7 0.8 0.9 Line Response (VOUT = 1.8V @ 400mA) Output Voltage (top) (V) Input Voltage (bottom) (V) Time (25µs/div) 1.40 1.45 1.50 1.55 1.60 1.65 1.701.751.80 1.85 1.90 3.2 3.4 3.6 3.8 4.0 4.2 4.44.64.8 5.0 5.2 Soft Start (VIN = 3.6V; VOUT = 1.8V; IOUT = 400mA) Enable and Output Voltage (top) (V) Inductor Current (bottom) (A) Time (25µs/div) -2.4 -1.6 -0.8 0.0 0.8 1.6 2.4 3.24.04.85.6 -0.4 0.0 0.4 0.8 1.2 1.6 2.0 2.42.83.23.6 Line Transient Response (40mA to 400mA; VIN = 3.6V; VOUT = 1.8V; C1 = 4.7µF) Output Voltage (top) (V) Load and Inductor Current (bottom) (200mA/div) Time (25µs/div) 1.0 1.1 1.2 1.31.4 1.5 -0.6 -0.4 -0.2 0.00.2 0.4 400mA 40mA Line Transient Response (40mA to 400mA; VIN = 3.6V; VOUT = 1.8V; C1 = 4.7µF; CFF = 100pF) Output Voltage (top) (V) Load and Inductor Current (bottom) (200mA/div) Time (25µs/div) 1.0 1.11.2 1.3 1.41.51.61.7 1.8 1.92.0 -0.6 -0.4-0.2 0.0 0.20.40.60.8 1.0 1.21.4 40 mA 400 mA No-Load Quiescent Current vs. Input Voltage Input Voltage (V) Supply Current (µA) 120 130140 150 160 170 180190 200 210 220 85°C -40°C 25°C AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 7

High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 8 1147.2006.05.1.0 Functional Block Diagram EN LX Err .Amp Logic DH DL PGND VIN AGND Voltage Reference INPUT OUT Functional Description The AAT1147 is a high performance 400mA 1.4MHz monolithic step-down converter. It has been designed with the goal of minimizing external component size and optimizing efficiency at heavy load. Apart from the small bypass input capacitor, only a small L-C filter is required at the output. Typically, a 4.7µH inductor and a 4.7µF ceramic capacitor are recommended (see table of values). Only three external power components (C IN, COUT, and L) are required. Output voltage is programmed with external resistors and ranges from 0.6V to the input voltage. An additional feed-forward capacitor can also be added to the external feedback to pro- vide improved transient response (see Figure 1). At dropout, the converter duty cycle increases to 100% and the output voltage tracks the input volt- age minus the R DS(ON) drop of the P-channel high- side MOSFET. The input voltage range is 2.7V to 5.5V. The con- verter efficiency has been optimized for heavy load conditions up to 400mA. The internal error amplifier and compensation pro- vide excellent transient response, load, and line regulation. Soft start eliminates any output voltage overshoot when the enable or the input voltage is applied.

The AAT1147 is a peak current mode step-down converter. The current through the P-channel MOSFET (high side) is sensed for current loop control, as well as short circuit and overload pro- tection. A fixed slope compensation signal is added to the sensed current to maintain stability for duty cycles greater than 50%. The peak current mode loop appears as a voltage-programmed current source in parallel with the output capacitor. The output of the voltage error amplifier programs the current mode loop for the necessary peak switch current to force a constant output voltage for all load and line conditions. Internal loop compen- sation terminates the transconductance voltage error amplifier output. The error amplifier reference is 0.6V. Soft Start / Enable Soft start limits the current surge seen at the input and eliminates output voltage overshoot. When pulled low, the enable input forces the AAT1147 into a low-power, non-switching state. The total input current during shutdown is less than 1µA. Current Limit and Over-Temperature Protection For overload conditions, the peak input current is limited. To minimize power dissipation and stresses under current limit and short-circuit conditions, switching is terminated after entering current limit for a series of pulses. Switching is terminated for seven consecutive clock cycles after a current limit has been sensed for a series of four consecutive clock cycles. Thermal protection completely disables switching when internal dissipation becomes excessive. The junction over-temperature threshold is 140°C with 15°C of hysteresis. Once an over-temperature or over-current fault conditions is removed, the output voltage automatically recovers. Under-Voltage Lockout Internal bias of all circuits is controlled via the VIN input. Under-voltage lockout (UVLO) guarantees sufficient V IN bias and proper operation of all inter- nal circuitry prior to activation. AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 9 Figure 1: Enhanced Transient Response Schematic. L1 CDRH3D16-4R7 4.7μH 10μF 4.7μF U1 AAT1147 SC70JW-8 C2 4.7μF 10V 0805 X5R VOUT =1.8V GND VIN Enable LX EN OUT VIN LX AGND PGND PGND PGND AAT1147 GND2 118k 59k C1 10μF 6.3V 0805 X5R 100pF n/aC3

The step-down converter uses peak current mode control with slope compensation to maintain stability for duty cycles greater than 50%. The output induc- tor value must be selected so the inductor current down slope meets the internal slope compensation requirements. The internal slope compensation for the AAT1147 is 0.24A/µsec. This equates to a slope compensation that is 75% of the inductor current down slope for a 1.5V output and 4.7µH inductor. This is the internal slope compensation. When externally programming the 0.6V version to 2.5V, the calculated inductance is 7.5µH. In this case, a standard 6.8µH value is selected. Table 1 displays inductor values for the AAT1147. Manufacturer's specifications list both the inductor DC current rating, which is a thermal limitation, and the peak current rating, which is determined by the saturation characteristics. The inductor should not show any appreciable saturation under normal load conditions. Some inductors may meet the peak and average current ratings yet result in excessive loss- es due to a high DCR. Always consider the losses associated with the DCR and its effect on the total converter efficiency when selecting an inductor. The 4.7µH CDRH3D16 series inductor selected from Sumida has a 105mΩ DCR and a 900mA DC current rating. At full load, the inductor DC loss is 17mW which gives a 2.8% loss in efficiency for a 400mA, 1.5V output. Input Capacitor Select a 4.7µF to 10µF X7R or X5R ceramic capac- itor for the input. To estimate the required input capacitor size, determine the acceptable input rip- ple level (V PP) and solve for C. The calculated value varies with input voltage and is a maximum when V IN is double the output voltage. Always examine the ceramic capacitor DC voltage coefficient characteristics when selecting the prop- er value. For example, the capacitance of a 10µF, 6.3V, X5R ceramic capacitor with 5.0V DC applied is actually about 6µF. CIN(MIN) = 1 VPP IO VO VIN VO VIN VO VIN CIN = VO VIN VPP IO 0.75 ⋅ VO L = = ≈ 3 ⋅ VO = 3 ⋅ 2.5V = 7.5μH m 0.75 ⋅ VO 0.24A μsec A μsec A A μsec 0.75 ⋅ VO m = = = 0.24 L 0.75 ⋅ 1.5V 4.7μH A μsec AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 10 1147.2006.05.1.0 Table 1: Inductor Values. Configuration Output Voltage Inductor 0.6V Adjustable With 1V, 1.2V 2.2µH External Feedback 1.5V, 1.8V 4.7µH 2.5V, 3.3V 6.8µH

The maximum input capacitor RMS current is: The input capacitor RMS ripple current varies with the input and output voltage and will always be less than or equal to half of the total DC load current. for V IN = 2 · VO The term appears in both the input voltage ripple and input capacitor RMS current equations and is a maximum when V O is twice VIN. This is why the input voltage ripple and the input capacitor RMS current ripple are a maximum at 50% duty cycle. The input capacitor provides a low impedance loop for the edges of pulsed current drawn by the AAT1147. Low ESR/ESL X7R and X5R ceramic capacitors are ideal for this function. To minimize stray inductance, the capacitor should be placed as closely as possible to the IC. This keeps the high frequency content of the input current localized, minimizing EMI and input voltage ripple. The proper placement of the input capacitor (C2) can be seen in the evaluation board layout in Figure 2. A laboratory test set-up typically consists of two long wires running from the bench power supply to the evaluation board input voltage pins. The induc- tance of these wires, along with the low-ESR ceramic input capacitor, can create a high Q net- work that may affect converter performance. This problem often becomes apparent in the form of excessive ringing in the output voltage during load transients. Errors in the loop phase and gain meas- urements can also result. Since the inductance of a short PCB trace feeding the input voltage is significantly lower than the power leads from the bench power supply, most applications do not exhibit this problem. In applications where the input power source lead inductance cannot be reduced to a level that does not affect the converter performance, a high ESR tantalum or aluminum electrolytic should be placed in parallel with the low ESR, ESL bypass ceramic. This dampens the high Q network and stabilizes the system. Output Capacitor The output capacitor limits the output ripple and provides holdup during large load transitions. A 4.7µF to 10µF X5R or X7R ceramic capacitor typi- cally provides sufficient bulk capacitance to stabi- lize the output during large load transitions and has the ESR and ESL characteristics necessary for low output ripple. The output voltage droop due to a load transient is dominated by the capacitance of the ceramic out- put capacitor. During a step increase in load cur- rent, the ceramic output capacitor alone supplies the load current until the loop responds. Within two or three switching cycles, the loop responds and the inductor current increases to match the load current demand. The relationship of the output volt- age droop during the three switching cycles to the output capacitance can be estimated by: Once the average inductor current increases to the DC load level, the output voltage recovers. The above equation establishes a limit on the minimum value for the output capacitor with respect to load transients. The internal voltage loop compensation also limits the minimum output capacitor value to 4.7µF. This is due to its effect on the loop crossover frequency (bandwidth), phase margin, and gain margin. Increased output capacitance will reduce the crossover frequency with greater phase margin. COUT = 3 · ΔILOAD VDROOP · FS VO VIN VO VIN IO RMS(MAX)I 2= VO VIN VO VIN VO VIN VO VIN AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 11

The AAT1147, combined with an external feedfor- ward capacitor (C4 in Figure 1), delivers enhanced transient response for extreme pulsed load appli- cations. The addition of the feedforward capacitor typically requires a larger output capacitor C1 for stability. Table 2: Resistor Values For Use With 0.6V Step-Down Converter. Thermal Calculations There are three types of losses associated with the AAT1147 step-down converter: switching losses, conduction losses, and quiescent current losses. Conduction losses are associated with the R DS(ON) characteristics of the power output switching devices. Switching losses are dominated by the gate charge of the power output switching devices. At full load, assuming continuous conduction mode (CCM), a simplified form of the losses is given by: I Q is the step-down converter quiescent current. The term tsw is used to estimate the full load step- down converter switching losses. PTOTAL IO 2 · (RDSON(H) · VO + RDSON(L) · [VIN - VO]) VIN + (tsw · FS · IO + IQ) · VIN R2 = 59kΩΩ R2 = 221kΩΩ VOUT (V) R1 (k ΩΩ) R1 (k ΩΩ) 0.8 19.6 75 0.9 29.4 113 1.0 39.2 150 1.1 49.9 187 1.2 59.0 221 1.3 68.1 261 1.4 78.7 301 1.5 88.7 332 1.8 118 442 1.85 124 464 2.0 137 523 2.5 187 715 3.3 267 1000 AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 13 Figure 5: AAT1147 Evaluation Board Schematic. L1 CDRH3D16-4R7 4.7μH 10μF 4.7μF U1 AAT1147 SC70JW-8 C1 10μF 10V 0805 X5R C2 4.7μF 10V 0805 X5R VOUT GND VIN Enable LX EN1 OUT2 VIN3 LX4 AGND 5 PGND 6 PGND 7 PGND 8 AAT1147 GND2 118k 59k

Step-Down Converter Design Example Specifications VO = 1.8V @ 400mA (adjustable using 0.6V version), Pulsed Load ΔILOAD = 300mA VIN = 2.7V to 4.2V (3.6V nominal) FS = 1.4MHz TAMB = 85°C 1.8V Output Inductor (use 4.7µH; see Table 1) For Sumida inductor CDRH3D16, 4.7µH, DCR = 105m Ω. 1.8V Output Capacitor VDROOP = 0.1V 4.7μH · 1.4MHz · 4.2V 23 RMSI L1 · FS · VIN(MAX) = · 3 · ΔILOAD VDROOP · FS 3 · 0.3A 0.1V · 1.4MHz COUT = = = 6.4 μF; use 10µF

• = 45mArms (VO) · (VIN(MAX) - VO) = Pesr = esr · IRMS 2 = 5mΩ · (45mA)2 = 10μW IPKL1 = IO + ΔIL1 = 0.4A + 0.068A = 0.468A2 PL1 = IO 2 ⋅ DCR = 0.4A2 ⋅ 105mΩ = 17mW L1 = 3 ⋅ VO2 = 3 ⋅ 1.8V = 5.4μHμsec A μsec A AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 15

Input Ripple VPP = 25mV AAT1147 Losses TJ(MAX) = TAMB + ΘJA · PLOSS = 85°C + (160°C/W) · 126mW = 105.1°C PTOTAL + (tsw · FS · IO + IQ) · VIN IO 2 · (RDSON(H) · VO + RDSON(L) · [VIN -VO]) VIN + (5ns · 1.4MHz · 0.4A + 70μA) · 4.2V = 126mW 4.2V IO RMSI P = esr · IRMS 2= = 0.2Arms CIN = = = 3.11 μF; use 4.7μF1 VPP IO 25mV 0.4A AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 16 1147.2006.05.1.0

Table 3: Evaluation Board Component Values. Table 4: Typical Surface Mount Inductors. Inductance Max DC DCR Size (mm) Manufacturer Part Number (µH) Current (A) ( ΩΩ) LxWxH Type Adjustable Version R2 = 59kΩΩ R2 = 221kΩΩ1 (0.6V device) VOUT (V) R1 (k ΩΩ) R1 (k ΩΩ) L1 (µH) 0.8 19.6 75.0 2.2 0.9 29.4 113 2.2 1.0 39.2 150 2.2 1.1 49.9 187 2.2 1.2 59.0 221 2.2 1.3 68.1 261 2.2 1.4 78.7 301 4.7 1.5 88.7 332 4.7 1.8 118 442 4.7 1.85 124 464 4.7 2.0 137 523 6.8 2.5 187 715 6.8 3.3 267 1000 6.8 AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 17 1. For reduced quiescent current, R2 and R4 = 221k Ω.

Table 5: Surface Mount Capacitors. Manufacturer Part Number Value Voltage Temp. Co. Case MuRata GRM219R61A475KE19 4.7µF 10V X5R 0805 MuRata GRM21BR60J106KE19 10µF 6.3V X5R 0805 MuRata GRM21BR60J226ME39 22µF 6.3V X5R 0805 AAT1147 High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 18 1147.2006.05.1.0

High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter 1147.2006.05.1.0 19

Ordering Information

Package Information

All dimensions in millimeters. 0.225 ± 0.075 0.45 ± 0.10 0.05 ± 0.05 2.10 ± 0.30 2.00 ± 0.20 7° ± 3° 4° ± 4° 0.15 ± 0.05

1.10 MAX

0.100 2.20 ± 0.20 0.048REF 0.50 BSC 0.50 BSC 0.50 BSC All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means Package Marking 1 Part Number (Tape and Reel)2 SC70JW-8 SCXYY AAT1147IJS-0.6-T1 Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold sub- ject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality con- trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and produ ct names appearing in this document are regis- tered trademarks or trademarks of their respective holders.