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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
General Description
The AAT1149A SwitchReg is a 2.2MHz step-down converter with an input voltage range of 2.2V to 5.5V. It is optimized to react quickly to load variations and operate with a tiny 0603 inductor that is only 1mm tall. The AAT1149A can deliver 400mA of load current and operates in PWM only mode for low noise operation. The 2.2MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT1149A is optimized for low noise portable applications. The AAT1149A is available in a Pb-free, space-saving 5-pin wafer-level chip scale (WLCSP) package and is rated over the -40C to +85C temperature range.
2.2MHz Fast Transient 400mA Step-Down Converter
Features
* * * * * * * * * * * * * * * Ultra-Small 0603 Inductor (Height = 1mm) VIN Range: 2.2V to 5.5V VOUT Fixed 1.875V 400mA Max Output Current Up to 98% Efficiency 3mA No Load Quiescent Current 2.2MHz Switching Frequency 70s Soft Start Fast Load Transient Over-Temperature Protection Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1A Shutdown Current 0.9x1.2mm WLCSP Package Temperature Range: -40C to +85C
Applications
* * * * * * Cellular Phones Digital Cameras Handheld Instruments Microprocessor / DSP Core / IO Power PDAs and Handheld Computers USB Devices
Typical Application
VIN = 3.6V U1 AAT1149A VOUT = 1.875V L1 2.2H
IN
C2 4.7F EN AGND PGND
LX FB PGND PGND
C1 4.7F
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Pin Descriptions
Pin #
1 2 3 4 5
2.2MHz Fast Transient 400mA Step-Down Converter
Symbol
FB EN AGND PGND IN LX
Function
Feedback input pin. Connect this pin ito the converted output voltage node. Enable pin. Non-power signal ground pin. Main power ground return pins. Connect to the output and input capacitor return. Input supply voltage for the converter. Switching node. Connect the inductor to this pin. It is internally connected to the drain of both high- and low-side MOSFETs.
Pin Configuration
WLCSP-5 (Top View)
FB AGND/PGND IN
1 3 4
2
EN LX
5
2
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1149A.2008.08.1.1
PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Absolute Maximum Ratings1
Symbol
VIN VLX VFB VEN TJ TLEAD
2.2MHz Fast Transient 400mA Step-Down Converter
Description
Input Voltage to GND LX to GND FB to GND EN to GND Operating Junction Temperature Range Maximum Soldering Temperature (at leads, 10 sec)
Value
6.0 -0.3 to VIN + 0.3 -0.3 to VIN + 0.3 -0.3 to 6.0 -40 to 150 300
Units
V V V V C C
Thermal Information
Symbol
PD JA
Description
Maximum Power Dissipation Thermal Resistance2
2, 3
Value
352 284
Units
mW C/W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions 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; use the NSMD (none-solder mask defined) pad style for tighter control on the copper etch process. 3. Derate 3.52 mW/C above 25C.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Electrical Characteristics1
VIN = 3.6V, TA = -40C to +85C, unless otherwise noted. Typical values are TA = 25C. Symbol Description Conditions Min
2.2 -3.0 3 600 0.40 0.35 VIN = 5.5V, VLX = 0 to VIN, VEN = GND VIN = 2.7V to 5.5V From Enable to Output Regulation TA = 25C 1 0.1 70 2.2 140 15 0.6 VIN = VOUT = 5.5V 1.4 -1.0 1.0
2.2MHz Fast Transient 400mA Step-Down Converter
Typ
Max
5.5 3.0 6 1.0
Units
V % mA A mA A %/V s MHz C C V V A
Step-Down Converter Input Voltage VIN VOUT Output Voltage Tolerance Quiescent Current IQ ISHDN Shutdown Current P-Channel Current Limit ILIM High Side Switch On Resistance RDS(ON)H RDS(ON)L Low Side Switch On Resistance LX Leakage Current ILXLEAK Line Regulation VLinereg TS Start-Up Time FOSC Oscillator Frequency TSD Over-Temperature Shutdown Threshold THYS Over-Temperature Shutdown Hysteresis EN Enable Threshold Low VEN(L) VEN(H) Enable Threshold High IEN Input Low Current
IOUT = 0 to 400mA, VIN = 2.7V to 5.5V No Load VEN = GND
1. The AAT1149A is guaranteed to meet performance specifications over the -40C to +85C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
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1149A.2008.08.1.1
PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Typical Characteristics
Efficiency vs. Output Current
(VOUT = 1.875V)
100 90 70 60 50 40 30 20 10 0 0.1 1 10 100 80 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -0.2 0.1 1 10 100 1000
2.2MHz Fast Transient 400mA Step-Down Converter
Load Regulation
(VOUT = 1.875V)
VIN = 5V VIN = 4.2V VIN = 3.6V VIN = 3V VIN = 2.2V
VIN = 5V VIN = 4.2V VIN = 3.6V VIN = 3V VIN = 2.7V
1000
Output Current (A)
Output Error (%)
Efficiency (%)
Output Current (A)
No Load Quiescent Current vs. Input Voltage
5 2
Frequency Variation vs. Input Voltage
(VOUT = 1.875V)
Supply Current (A)
4.5 4 3.5 3 2.5 2 1.5 1 2.5 3 3.5 4 4.5 5
Frequency Variation (%)
6
1 0 -1 -2 -3 -4 2.7
T = 85C T = 25C T = -40C
5.5
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Switching Frequency Variation vs. Temperature
10 8 6 2.0
Output Voltage Error vs. Temperature
(VIN = 3.6V; VO = 1.875V; IOUT = 400mA)
Output Error (%)
Variation (%)
4 2 0 -2 -4 -6 -8 -10 -40 -20 0 20 40 60 80 100 120
1.0
0.0
-1.0
-2.0 -40
-20
0
20
40
60
80
100
Temperature (C)
Temperature (C)
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Typical Characteristics
Line Regulation
(VOUT = 1.875V)
0.8 0.6
2.2MHz Fast Transient 400mA Step-Down Converter
Line Transient
(VOUT = 1.875V; VIN = 3.6V to 4.2V) Input Voltage (top) (1V/div)
5 4 3 2 1 0 0.04 0.02 0 -0.02
1
Output Voltage (bottom) (20mV/div)
Accuracy (%)
0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1
2.5
400mA
0mA
100mA
600mA
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Time (200s/div)
Line Transient
(VOUT = 1.875V; No Load)
4.50 1.94 1.92 1.90 1.88 1.86 1.84 1.82 1.80 1.78
N-Channel RDS(ON) vs. Input Voltage
(WLCSP-5) Output Voltage (bottom) (V)
750 700 650
Input Voltage (top) (V)
4.25 4.00 3.75 3.50 3.25 3.00 2.75 2.50
RDS(ON) (m)
600 550 500 450 400 350 300 250 2.5 25C 3
120C
100C
85C
3.5
4
4.5
5
5.5
6
Time (50s/div)
Input Voltage (V)
P-Channel RDS(ON) vs. Input Voltage
(WLCSP-5)
750 650 120C 100C 700
Load Transient
(VOUT = 1.875V; VIN = 3.6V; IOUT = 1mA to 400mA) Output Current (middle) Inductor Current (bottom) (500mA/div)
0.2 0 -0.2 0.5 0 0.5 0
RDS(ON) (m)
600 550 500 450 400 350 300 250 2.5 3 3.5 4 4.5 5 5.5 6 25C 85C
Input Voltage (V)
Output Voltage (top) (200mV/div)
Time (100s/div)
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Typical Characteristics
Load Transient
(VOUT = 1.875V; VIN = 3.6V; IOUT = 10mA to 400mA) Enable and Output Voltage (top) (V)
4.00 3.00 2.00 1.00 0.00 -1.00 -2.00 -3.00 -4.00
2.2MHz Fast Transient 400mA Step-Down Converter
Soft Start
(VOUT = 1.875V)
2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0.00
Output Current (middle) Inductor Current (bottom) (500mA/div)
Output Voltage (top) (200mV/div)
0.2 0 -0.2 0.5 0 0.5 0
Inductor Current (bottom) (250mA/div)
Time (100s/div)
Time (50s/div)
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Functional Block Diagram
FB IN
2.2MHz Fast Transient 400mA Step-Down Converter
Err Amp .
DH
Voltage Reference
Logic
LX
EN
INPUT
DL
PGND
AGND
Functional Description
The AAT1149A is a high performance 400mA 2.2MHz monolithic step-down converter. It minimizes external component size, enabling the use of a tiny 0603 inductor that is only 1mm tall, and is optimized for low noise. Apart from the small bypass input capacitor, only a small L-C filter is required at the output. Typically, a 1.8H inductor and a 4.7F ceramic capacitor are recommended (see table of values). Only three external power components (CIN, COUT, and L) are required. Output voltage is fixed internally.
At dropout, the converter duty cycle increases to 100% and the output voltage tracks the input voltage minus the RDS(ON) drop of the P-channel high-side MOSFET. The input voltage range is 2.2V to 5.5V. The converter efficiency has been optimized for all load conditions, ranging from no load to 400mA. The internal error amplifier and compensation provides excellent transient response, load, and line regulation. Soft start eliminates any output voltage overshoot when the enable or the input voltage is applied.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Control Loop
The AAT1149A 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 protection. 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 compensation terminates the transconductance voltage error amplifier output. For the adjustable output, the error amplifier reference is fixed at 0.6V.
2.2MHz Fast Transient 400mA Step-Down Converter
Applications Information
Inductor Selection
The step-down converter uses peak current mode control with slope compensation to maintain stability for duty cycles greater than 50%. The output inductor value must be selected so the inductor current down slope meets the internal slope compensation requirements. A 2.2H inductor is recommended for a 1.875V output. 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 losses 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 2.2H CBC2518 series inductor selected from Taiyo Yuden has a 130mW DCR and a 890mA saturation current rating. At full load, the inductor DC loss is 21mW which gives a 2.8% loss in efficiency for a 400mA, 1.875V output.
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 AAT1149A into a low-power, non-switching state. The total input current during shutdown is less than 1A.
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 140C with 15C of hysteresis. Once an over-temperature or over-current fault conditions is removed, the output voltage automatically recovers.
Input Capacitor
Select a 4.7F to 10F X7R or X5R ceramic capacitor for the input. To estimate the required input capacitor size, determine the acceptable input ripple level (VPP) and solve for C. The calculated value varies with input voltage and is a maximum when VIN is double the output voltage.
CIN =
V VO * 1- O VIN VIN
VPP - ESR * FS IO
VO V 1 * 1 - O = for VIN = 2 * VO VIN VIN 4 1 CIN(MIN) = VPP - ESR * 4 * FS IO
Always examine the ceramic capacitor DC voltage coefficient characteristics when selecting the proper value. For example, the capacitance of a 10F, 6.3V, X5R ceramic capacitor with 5.0V DC applied is actually about 6F.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
The maximum input capacitor RMS current is:
2.2MHz Fast Transient 400mA Step-Down Converter
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.
IRMS = IO *
VO V * 1- O VIN VIN
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.
Output Capacitor
The output capacitor limits the output ripple and provides holdup during large load transitions. A 4.7F to 10F X5R or X7R ceramic capacitor typically provides sufficient bulk capacitance to stabilize 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 output capacitor. During a step increase in load current, 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 voltage droop during the three switching cycles to the output capacitance can be estimated by:
VO V * 1- O = VIN VIN
for VIN = 2 * VO
D * (1 - D) =
0.52 =
1 2
IRMS(MAX) =
VO
V * 1- O
IN
IO 2
The term V V appears in both the input voltage ripple and input capacitor RMS current equations and is a maximum when VO is twice VIN. This is why the input voltage ripple and the input capacitor RMS current ripple are a maximum at 50% duty cycle.
IN
The input capacitor provides a low impedance loop for the edges of pulsed current drawn by the AAT1149A. 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 1. 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 inductance of these wires, along with the low-ESR ceramic input capacitor, can create a high Q network 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 measurements 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
COUT =
3 * ILOAD VDROOP * FS
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 4.7F. 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. The maximum output capacitor RMS ripple current is given by:
IRMS(MAX) =
VOUT * (VIN(MAX) - VOUT) L * FS * VIN(MAX) 2* 3 *
1
Dissipation due to the RMS current in the ceramic output capacitor ESR is typically minimal, resulting in less than a few degrees rise in hot-spot temperature.
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1149A.2008.08.1.1
PRODUCT DATASHEET
AAT1 149A
SwitchRegTM 2.2MHz Fast Transient 400mA Step-Down Converter
Figure 1: AAT1149AIUV Evaluation Board Top Side.
VIN
4
Figure 2: AAT1149AIUV Evaluation Board Bottom Side.
U1
5
L1 VOUT R1 0 R2 open
IN
LX
EN
3 2 1 2
AAT1149AIUV
EN FB
C3 open
1
C1 4.7F
C2 4.7F
GND
3
WLCSP-5
Figure 3: AAT1149AIUV Evaluation Board Schematic.
Thermal Calculations
There are three types of losses associated with the AAT1149A step-down converter: switching losses, conduction losses, and quiescent current losses. Conduction losses are associated with the RDS(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:
PTOTAL =
IO2 * (RDS(ON)H * VO + RDS(ON)L * [VIN - VO]) VIN
+ (tsw * FS * IO + IQ) * VIN
IQ is the step-down converter quiescent current. The term tsw is used to estimate the full load step-down converter switching losses.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM 2.2MHz Fast Transient 400mA Step-Down Converter
Layout
The suggested PCB layout for the AAT1149A is shown in Figures 1 and 2. The following guidelines should be used to help ensure a proper layout. 1. 2. The input capacitor (C2) should connect as closely as possible to IN (Pin 4) and PGND (Pin 3). C1 and L1 should be connected as closely as possible. The connection of L1 to the LX pin should be as short as possible. The feedback trace or FB pin (Pin 1) should be separate from any power trace and connect as closely as possible to the load point. Sensing along a highcurrent load trace will degrade DC load regulation. The resistance of the trace from the load return to the PGND (Pin 3) should be kept to a minimum. This will help to minimize any error in DC regulation due to differences in the potential of the internal signal ground and the power ground. The pad on the PCB for the WLCSP-5 package should use NSMD (non-solder mask defined) configuration due to its tighter control on the copper etch process. A pad thickness of less than 1oz is recommended to achieve higher stand-off. For the condition where the step-down converter is in dropout at 100% duty cycle, the total device dissipation reduces to:
PTOTAL = IO2 * RDS(ON)H + IQ * VIN
Since RDS(ON), quiescent current, and switching losses all vary with input voltage, the total losses should be investigated over the complete input voltage range. Given the total losses, the maximum junction temperature can be derived from the JA for the WLCSP-8 package which is 284C/W.
3.
TJ(MAX) = PTOTAL * JA + TAMB
4.
WLCSP Package Light Sensitivity
The electrical performance of the WLCSP package can be adversely affected by exposing the device to certain light sources such as direct sunlight or a halogen lamp whose wavelengths are red and infra-reds. However, fluorescent lighting has very little effect on the electrical performance of the WLCSP package. 5.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM 2.2MHz Fast Transient 400mA Step-Down Converter
Step-Down Converter Design Example
Specifications
VO = 1.875V @ 400mA (adjustable using 0.6V version), Pulsed Load DILOAD = 300mA VIN = 2.7V to 4.2V (3.6V nominal) FS = 2.2MHz
TAMB = 85C
1.875V Output Inductor
L1 = 1 s s * VO = 1 * 1.875V = 1.875H (use 2.2H) A A
For Taiyo Yuden inductor CBC2518T2R2M, 2.2H, DCR = 130m.
IL1 =
VO V 1.875V 1.875V * 1- O = * 1= 214mA L1 * FS VIN 2.2H * 2.2MHz 4.2V IL1 = 0.4A + 0.107A = 0.507A 2
IPKL1 = IO +
PL1 = IO2 * DCR = 0.4A2 * 130m = 21mW
1.875V Output Capacitor
VDROOP = 0.1V
COUT = IRMS =
3 * ILOAD 3 * 0.3A = = 4.1F; use 4.7F 0.1V * 2.2MHz VDROOP * FS (VO) * (VIN(MAX) - VO) 1 1.875V * (4.2V - 1.875V) * = 62mArms = L1 * FS * VIN(MAX) 2 * 3 2.2H * 2.2MHz * 4.2V 2* 3 1 *
Pesr = esr * IRMS2 = 5m * (62mA)2 = 19W
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Input Capacitor
Input Ripple VPP = 10mV
2.2MHz Fast Transient 400mA Step-Down Converter
CIN =
1 VPP - ESR * 4 * FS IO
IO = 0.2Arms 2
=
1 10mV - 5m * 4 * 2.2MHz 0.4A
= 5.7F; use 4.7F
IRMS =
P = esr * IRMS2 = 5m * (0.2A)2 = 0.2mW
AAT1149A Losses (WLCSP-5 Package)
PTOTAL = IO2 * (RDS(ON)H * VO + RDS(ON)L * [VIN -VO]) VIN
+ (tsw * FS * IO + IQ) * VIN
=
0.42 * (0.725 * 1.875V + 0.7 * [4.2V - 1.875V])
4.2V
+ (5ns * 2.2MHz * 0.4A + 3mA) * 4.2V = 149mW TJ(MAX) = TAMB + JA * PLOSS = 85C + (284C/W) * 149mW = 127C
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1149A.2008.08.1.1
PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Manufacturer
Taiyo Yuden
2.2MHz Fast Transient 400mA Step-Down Converter
Part Number/Type
BRL2012 CBC2518 Wire Wound Chip CDRH2D09 Shielded LQH2MCN4R7M02 Unshielded SD3118 Shielded
Inductance (H)
2.2 2.2 2.5 2.2 2.2
Rated Current (mA)
550 890 440 425 510
DCR ()
250 130 150 480 116
Size (mm) LxWxH
0805 (HMAX = 1mm) 2.5x1.8x1.8 3.2x3.2x1.0 2.0x1.6x0.95 3.15x3.15x1.2
Sumida Murata Coiltronics
Table 1: Typical Surface Mount Inductors. Manufacturer
Murata Murata Murata
Part Number
GRM219R61A475KE19 GRM21BR60J106KE19 GRM185R60J475M
Value
4.7F 10F 4.7F
Voltage
10V 6.3V 6.3V
Temp. Co.
X5R X5R X58
Case
0805 0805 0603
Table 2: Surface Mount Capacitors.
1. For reduced quiescent current, R2 = 221k.
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PRODUCT DATASHEET
AAT1 149A
SwitchRegTM
Ordering Information
Output Voltage1
1.875
2.2MHz Fast Transient 400mA Step-Down Converter
Package
WLCSP-5
Marking
3UYW
3
Part Number (Tape and Reel)2
AAT1149AIUV-1.875-T1
All AnalogicTech products are offered in Pb-free packaging. The term "Pb-free" means semiconductor products that are in compliance with current RoHS standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more information, please visit our website at http://www.analogictech.com/about/quality.aspx.
Package Information
WLCSP-5
0.910 0.035 0.400 BSC + 0.030 - 0.025 0.380 0.300 Line_1: Part Code Line_2: Year Code + Date Code
0.180
Line_1
Line_2
0.693 BSC
C
0.4
00
0.300
BS
0.070 0.140 o 0.2 (Ref.) Pin 1 indication
60
0.200 0.030
Bottom View
1.235 0.035
Side View
Top View
End View
All dimensions in millimeters.
1. Contact Sales for other voltage options. 3. Sample stock is generally held on part numbers listed in BOLD. 3. YW = date code (year, week) for WLCSP-5 package.
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+ 0.030 0.580 -0.070
1149A.2008.08.1.1
PRODUCT DATASHEET
AAT1 149A
SwitchRegTM 2.2MHz Fast Transient 400mA Step-Down Converter
Advanced Analogic Technologies, Inc. 3230 Scott Boulevard, Santa Clara, CA 95054 Phone (408) 737-4600 Fax (408) 737-4611
(c) 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. Except as provided in AnalogicTech's terms and conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control 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 product names appearing in this document are registered trademarks or trademarks of their respective holders.
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