AAT1112 SwitchReg 1.5A step-down converter with input voltage range 2.

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AAT1112 SwitchReg 1.5A step-down converter with input voltage range 2.

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1.5A, 1.4MHz Step-Down Converter General Description
AAT1112 SwitchReg 1.5A step-down converter with input voltage range 2.4V 5.5V adjustable output voltage from 0.6V VIN. 1.4MHz switching frequency enables small external components. small footprint high efficiency make AAT1112 ideal choice portable applications. AAT1112 delivers 1.5A maximum output current while consuming only 42µA no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs 100% duty cycle operation make AAT1112 ideal choice high output voltage, high current applications which require dropout threshold. AAT1112 provides excellent transient response high output accuracy across operating range. external compensation components required. AAT1112 designed maintain high efficiency throughout load range. Pulling MODE/ SYNC high enables "PWM Only" mode, maintaining constant frequency output ripple across operating range. Alternatively, converter synchronized external clock input MODE/SYNC pin. Over-temperature short-circuit protection safeguard AAT1112 system components from damage. AAT1112 available Pb-free, space-saving TDFN33-12 2.75x3mm TSOPJW-12 package. product rated over operating temperature range -40°C +85°C.
AAT1112
SwitchReg
1.5A Maximum Output Current Input Voltage: 2.4V 5.5V Output Voltage: 0.6V Efficiency 42µA Load Quiescent Current External Compensation Required 1.4MHz Switching Frequency Synchronizable External Clock Optional "PWM Only" Noise Mode 100% Duty Cycle Low-Dropout Operation Internal Soft Start Over-Temperature Current Limit Protection <1µA Shutdown Current TSOPJW-12 TDFN33-12 Package Temperature Range: -40°C +85°C
Applications
Cellular Phones Digital Cameras Hard Disk Drives Players PDAs Handheld Computers Portable Media Players Devices
Typical Application
3.3µH
VOUT 3.3V
AAT1112
267k
10µF
MODE/SYNC
PGND
22µF
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Descriptions
TSOPJW-12 TDFN33-12
AAT1112
Symbol
Function
Switching node. Connect output inductor this pin. switching node internally connected drain both high- low-side MOSFETs. Input voltage power switches. connected. Connect ground PFM/PWM mode optimized efficiency throughout load range. Connect high noise operation under operating conditions. Connect external clock synchronization (PWM only). Enable pin. logic disables converter consumes less than current. When connected high, resumes normal operation. Power supply. Supplies power internal circuitry. Feedback input pin. This connected either directly converter output external resistive divider adjustable output. Non-power signal ground pin. Main power ground return pin. Connect output input capacitor return. Exposed paddle (bottom); connect ground closely possible device.
MODE/SYNC
PGND
Configuration
TSOPJW-12 (Top View) TDFN33-12 (Top View)
MODE/SYNC
PGND
PGND PGND PGND
MODE/SYNC
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Absolute Maximum Ratings1
Symbol
TLEAD
AAT1112
Description
VIN, MODE/SYNC, Operating Junction Temperature Range Maximum Soldering Temperature leads, sec)
Value
-0.3 -0.3 -0.3
Units
Thermal Information
Symbol
Description
Maximum Power Dissipation Thermal Resistance2 TSOPJW-12 TDFN33-12 TSOPJW-12 TDFN33-12
Value
0.625
Units
°C/W
Stresses above those listed Absolute Maximum Ratings cause permanent damage device. Functional operation conditions other than operating conditions specified implied. Only Absolute Maximum Rating should applied time. Mounted board. 1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Electrical Characteristics1
3.6V; -40°C +85°C, unless otherwise noted. Typical values 25°C. Symbol
VOUT VUVLO VOUT ISHDN ILIM RDS(ON)H RDS(ON)L ILXLEAK ILXLK, VLOADREG VLINEREG/VIN FOSC THYS MODE/SYNC VMODE/SYNC(L) VMODE/SYNC(H) IMODE/SYNC Enable Threshold Enable Threshold High Enable Leakage Current Enable Threshold Enable Threshold High Enable Leakage Current 5.5V -1.0 5.5V -1.0
AAT1112
Description
Input Voltage Output Voltage Range UVLO Threshold Output Voltage Tolerance Quiescent Current Shutdown Current Current Limit High Side Switch On-Resistance Side Switch On-Resistance Leakage Current Reverse Leakage Current Load Regulation Line Regulation Feedback Threshold Voltage Accuracy (Adjustable Version) Leakage Current Internal Oscillator Frequency Synchronous Clock Start-Up Time Over-Temperature Shutdown Threshold Over-Temperature Shutdown Hysteresis
Conditions
Units
0.609 1.68
Rising Hysteresis Falling IOUT 1.5A, 2.4V 5.5V Load
-3.0 0.120 0.085
5.5V, Unconnected, 5.5V, ILOAD 1.5A 2.4V 5.5V Load, 25°C VOUT 1.0V 1.12 0.60 From Enable Output Regulation 0.591
0.60
AAT1112 guaranteed meet performance specifications over -40°C +85°C operating temperature range assured design, characterization, correlation with statistical process controls.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Typical Characteristics
Efficiency Output Current
(PFM Mode; VOUT 3.3V)
AAT1112
Load Regulation
(PFM Mode; VOUT 3.3V)
0.50
3.6V 4.2V 5.0V
VOUT Error
Efficiency
0.25
3.6V
4.2V
0.00
-0.25
5.0V
1000
10000
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency Output Current
(PWM Mode; VOUT 3.3V)
0.50
Load Regulation
(PWM Mode; VOUT 3.3V)
3.6V
Efficiency
5.0V 4.2V
VOUT Error
0.25
3.6V
5.0V
0.00
4.2V
-0.25
1000
10000
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency Output Current
(PFM Mode; VOUT 2.5V)
Load Regulation
(PFM Mode; VOUT 2.5V)
0.50
2.7V
VOUT Error
Efficiency
0.25
2.7V
3.6V
3.6V
4.2V
0.00
-0.25
4.2V
1000
10000
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Typical Characteristics
Efficiency Output Current
(PWM Mode; VOUT 2.5V)
0.50
AAT1112
Load Regulation
(PWM Mode; VOUT 2.5V) 3.6V
2.7V
Efficiency
5.0V 4.2V 3.6V
1000 10000
VOUT Error
0.25
2.7V
5.0V
0.00
-0.25
4.2V
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency Output Current
(PFM Mode; VOUT 1.8V)
0.50
Load Regulation
(PFM Mode; VOUT 1.8V)
2.7V
VOUT Error
0.25
Efficiency
3.6V
2.7V
3.6V
4.2V
0.00
-0.25
4.2V
1000 10000 -0.50 1000
Output Current (mA)
Output Current (mA)
Efficiency Output Current
(PWM Mode; VOUT 1.8V)
0.50
Load Regulation
(PWM Mode; VOUT 1.8V)
Efficiency
4.2V
VOUT Error
2.7V
0.25
2.7V
3.6V
0.00
3.6V
-0.25
4.2V
1000
10000
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Typical Characteristics
Efficiency Output Current
(PFM Mode; VOUT 1.2V)
0.50
AAT1112
Load Regulation
(PFM Mode; VOUT 1.2V)
2.7V
VOUT Error
0.25
Efficiency
1000 10000
2.7V
3.6V
3.6V
4.2V
0.00
-0.25
4.2V
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency Output Current
(PWM Mode; VOUT 1.2V)
0.50
Load Regulation
(PWM Mode; VOUT 1.2V)
2.7V 4.2V 3.6V
Efficiency
VOUT Error
0.25
2.7V
3.6V
0.00
-0.25
4.2V
1000
10000
-0.50
1000
10000
Output Current (mA)
Output Current (mA)
Output Voltage Temperature
(VIN 3.6V; VOUT 1.8V; IOUT
Supply Current Supply Voltage
(VOUT 1.8V; Load; Mode)
Output Voltage Change
-0.2 -0.4 -0.6 -0.8 -1.0
Supply Current (µA)
85°C
25°C
-40°C
Temperature (°C)
Supply Voltage
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Typical Characteristics
Switching Frequency Temperature
(VIN 3.6V; VOUT 1.8V; IOUT
AAT1112
Line Regulation
(VOUT 1.8V; IOUT
0.12
Switching Frequency (MHz)
Output Voltage Error
1.40 1.38 1.36 1.34 1.32 1.30 1.28 1.26 1.24
0.10 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04
Temperature (°C)
Supply Voltage
Switching Frequency Input Voltage
(IOUT
Enable Soft Start
(VOUT 3.6V; IOUT 1.5A)
Switching Frequency (MHz)
1.40 1.39 1.38 1.37 1.36 1.35 1.34 1.33 1.32
VOUT 1.8V VOUT 2.5V
(2V/div) VOUT (1V/div) (500mA/div) Time (100µs/div)
VOUT 3.3V
Input Voltage
P-Channel RDS(ON) Input Voltage
N-Channel RDS(ON) Input Voltage
120°C
120°C
RDS(ON)
RDS(ON)
85°C 25°C
85°C 25°C
Input Voltage
Input Voltage
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Typical Characteristics
Heavy Load Switching Waveform
(PWM Mode; 3.6V; VOUT 1.8V; 1.5A Load)
Output Voltage coupled) (top) (mV)
-2.0 -4.0 -6.0 -8.0 -10.0 -12.0
AAT1112
Light Load Switching Waveform
(PWM Mode; 3.6V; VOUT 1.8V; Load)
Output Voltage coupled) (top) (mV)
-2.0 -4.0 -6.0 -8.0 -10.0 -12.0
1200
Inductor Ripple Current (bottom) (mA)
Inductor Ripple Current (bottom) (mA)
1000 -200 -400
Time (2.5µs/div)
Time (2.5µs/div)
Light Load Switching Waveform
(PFM Mode; 3.6V; VOUT 1.8V; Load)
Output Voltage coupled) (top) (mV)
-4.0 -8.0 -12.0 -16.0 -20.0 -24.0
Load Transient Response
(VIN 3.6V; VOUT 1.8V; 100pF)
Inductor Ripple Current (bottom) (mA)
-100
Output Voltage (top)
Load Current (bottom)
Time (100µs/div)
Time (20µs/div)
Load Transient Response
(VIN 3.6V; VOUT 1.8V; CFF)
Line Transient Response
(VOUT 1.8V; 1.5A Load)
Output Voltage (top)
Input Voltage (top)
Output Voltage (bottom)
Load Current (bottom)
Time (20µs/div)
Time (200µs/div)
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Functional Block Diagram
AAT1112
Err.
VREF Logic
MODE/SYNC
Input
PGND
Functional Description
AAT1112 high performance 1.5A monolithic step-down converter operating 1.4MHz switching frequency. minimizes external component size optimizes efficiency over complete load range. Apart from small bypass input capacitor, only small filter required output. Typically, 3.3µH inductor 22µF ceramic capacitor recommended 3.3V output (see table recommended values). dropout, converter duty cycle increases 100% output voltage tracks input voltage minus RDS(ON) drop P-channel highside MOSFET (plus drop external inductor). device integrates extremely RDS(ON) MOSFETs achieve dropout voltage
during 100% duty cycle operation. This advantageous applications requiring high output voltages (typically 2.5V) input voltages. integrated low-loss MOSFET switches provide greater than efficiency full load. operation maintains high efficiency under light load conditions (typically <150mA). MODE/ SYNC allows optional "PWM only" mode. This maintains constant frequency output ripple across load conditions. Alternatively, synchronized external clock MODE/ SYNC input. External synchronization maintained between 0.6MHz 3.0MHz. battery-powered applications, decreases, converter dynamically adjusts operating frequency prior dropout maintain required duty cycle provide accurate output regulation.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
Output regulation maintained until dropout voltage, minimum input voltage, reached. 1.5A output load, dropout voltage headroom approximately 200mV. AAT1112 typically achieves better than ±0.5% output regulation across input voltage output load range. current limit 2.0A (typical) protects system components from short-circuit damage. Typical load quiescent current 42µA. Thermal protection completely disables switching when maximum junction temperature detected. junction over-temperature threshold 140°C with 15°C hysteresis. Once over-temperature over-current fault condition removed, output voltage automatically recovers. Peak current mode control optimized internal compensation provide high loop bandwidth excellent response input voltage fast load transient events. Soft start eliminates output voltage overshoot when enable input voltage applied. Under-voltage lockout prevents spurious start-up events. line conditions. Internal loop compensation terminates transconductance voltage error amplifier output. reference voltage internally program converter output voltage greater than equal 0.6V.
AAT1112
Soft Start/Enable
Soft start limits current surge seen input eliminates output voltage overshoot. When pulled low, enable input forces AAT1112 into low-power, non-switching state. total input current during shutdown less than 1µA.
Current Limit Over-Temperature Protection
overload conditions, peak input current limited. minimize power dissipation stresses under current limit short-circuit conditions, switching terminated after entering current limit series pulses. Switching terminated seven consecutive clock cycles after current limit been sensed series four consecutive clock cycles. Thermal protection completely disables switching when internal dissipation becomes excessive. junction over-temperature threshold 140°C with 15°C hysteresis. Once over-temperature over-current fault conditions removed, output voltage automatically recovers.
Control Loop
AAT1112 peak current mode step-down converter. current through P-channel MOSFET (high side) sensed current loop control, well short-circuit overload protection. fixed slope compensation signal added sensed current maintain stability duty cycles greater than 50%. peak current mode loop appears voltage-programmed current source parallel with output capacitor. output voltage error amplifier programs current mode loop necessary peak switch current force constant output voltage load
Under-Voltage Lockout
Internal bias circuits controlled input. Under-voltage lockout (UVLO) guarantees sufficient bias proper operation internal circuitry prior activation.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
AAT1112
10µF
AAT1112 TDFN33-12
3.3V 3.3µH (optional) 22µF
Enable
SYNC PGND PGND PGND
SYNC
Figure AAT1112 Schematic.
Component Selection
Inductor Selection
step-down converter uses peak current mode control with slope compensation maintain stability duty cycles greater than 50%. output inductor value must selected inductor current down slope meets internal slope compensation requirements. inductor should equal output voltage numeric value This guarantees that there sufficient internal slope compensation. Manufacturer's specifications list both inductor current rating, which thermal limitation, peak current rating, which determined saturation characteristics. inductor should show appreciable saturation under normal load conditions. Some inductors meet peak average current ratings result excessive losses high DCR. Always consider losses associated with effect total converter efficiency when selecting inductor. 3.3µH CDRH4D28 series Sumida inductor 49.2m worst case 1.57A current rating. full 1.5A load, inductor loss 97mW which gives less than 1.5% loss efficiency 1.5A, 3.3V output.
Input Capacitor
Select 10µF 22µF ceramic capacitor input. estimate required input capacitor size, determine acceptable input ripple level (VPP) solve calculated value varies with input voltage maximum when double output voltage.
CIN(MIN)
Always examine ceramic capacitor voltage coefficient characteristics when selecting proper value. example, capacitance 10µF, 6.3V, ceramic capacitor with 5.0V applied actually about 6µF.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
maximum input capacitor current
AAT1112
IRMS
problem often becomes apparent form excessive ringing output voltage during load transients. Errors loop phase gain measurements also result. Since inductance short trace feeding input voltage significantly lower than power leads from bench power supply, most applications exhibit this problem. applications where input power source lead inductance cannot reduced level that does affect converter performance, high tantalum aluminum electrolytic should placed parallel with ESR/ESL bypass ceramic capacitor. This dampens high network stabilizes system.
input capacitor ripple current varies with input output voltage will always less than equal half total load current.
0.52
IRMS(MAX)
Output Capacitor
output capacitor limits output ripple provides holdup during large load transitions. 10µF 22µF ceramic capacitor typically provides sufficient bulk capacitance stabilize output during large load transitions characteristics necessary output ripple. output voltage droop load transient dominated capacitance ceramic output capacitor. During step increase load current, ceramic output capacitor alone supplies load current until loop responds. Within three switching cycles, loop responds inductor current increases match load current demand. relationship output voltage droop during three switching cycles output capacitance estimated
ILOAD VDROOP
term appears both input voltage ripple input capacitor current equations maximum when twice VIN. This input voltage ripple input capacitor current ripple maximum duty cycle. input capacitor provides impedance loop edges pulsed current drawn AAT1112. ESR/ESL ceramic capacitors ideal this function. minimize stray inductance, capacitor should placed closely possible This keeps high frequency content input current localized, minimizing input voltage ripple. proper placement input capacitor (C1) seen evaluation board layout Layout section this datasheet (see Figure laboratory test set-up typically consists long wires running from bench power supply evaluation board input voltage pins. inductance these wires, along with low-ESR ceramic input capacitor, create high network that affect converter performance. This
COUT
Once average inductor current increases load level, output voltage recovers. above equation establishes limit minimum value output capacitor with respect load transients.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
internal voltage loop compensation also limits minimum output capacitor value 10µF. This effect loop crossover frequency (bandwidth), phase margin, gain margin. Increased output capacitance will reduce crossover frequency with greater phase margin.
AAT1112
Thermal Calculations
There three types losses associated with AAT1112 step-down converter: switching losses, conduction losses, quiescent current losses. Conduction losses associated with RDS(ON) characteristics power output switching devices. Switching losses dominated gate charge power output switching devices. full load, assuming continuous conduction mode (CCM), simplified form losses given
(RDS(ON)H RDS(ON)L [VIN VO])
Adjustable Output Resistor Selection
output voltage AAT1112 programmed with external resistors limit bias current required external feedback resistor string while maintaining good noise immunity, minimum suggested value 59k. Although larger value will further reduce quiescent current, will also increase impedance feedback node, making more sensitive external noise interference. Table summarizes resistor values various output voltages with either good noise immunity 221k reduced load input current. VOUT
1.85
PTOTAL
(tsw
221k
1000
step-down converter quiescent current. term used estimate full load stepdown converter switching losses. condition where step-down converter dropout 100% duty cycle, total device dissipation reduces
PTOTAL RDS(ON)H
19.6 29.4 39.2 49.9 59.0 68.1 78.7 88.7
Since RDS(ON), quiescent current, switching losses vary with input voltage, total losses should investigated over complete input voltage range. Given total losses, maximum junction temperature derived from TDFN3-12 TSOPJW-12 packages, which 50°C/W 160°C/W respectively.
TJ(MAX) PTOTAL TAMB
Table AAT1112 Resistor Values Various Output Voltages.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
Layout
suggested layout AAT1112 shown Figures following guidelines should used help ensure proper layout. input capacitor (C1) should connect closely possible PGND. should connected closely possible. connection should short possible. feedback trace should separate from power trace connect closely possible load point. Sensing along high-current load trace will degrade load regulation. resistance trace from load return PGND should kept minimum. This will help minimize error regulation differences potential internal signal ground power ground. Connect unused signal pins ground avoid unwanted noise coupling.
AAT1112
SYNC Vout Enable
AAT1112 AnalogicTech
Figure AAT1112 Evaluation Board Side Layout.
SYNC
Enable
Vout
AAT1112 AnalogicTech
Figure AAT1112 Evaluation Board Bottom Side Layout.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Design Example
Specifications
3.3V 1.5A, Pulsed Load ILOAD 1.5A 2.7V 4.2V (3.6V nominal) 1.2MHz
AAT1112
TAMB 85°C TDFN33-12 Package
Output Inductor
VO(µH) 3.3µH; Table Sumida inductor CDRH4D28 3.3µH 49.2m max.
3.3V 3.3V 179mA 3.3µH 1.2MHz 4.2V
IPK1
1.5A 0.089A 1.59A
IO12 1.5A2 49.2m 110mW
Output Capacitor
VDROOP 0.2V
ILOAD 1.5A 18.8µF; 22µF 0.2V 1.2MHz VDROOP (VOUT) (VIN(MAX) VOUT) 3.3V (4.2V 3.3V) 52mArms VIN(MAX) 3.3µH 1.2MHz 4.2V
COUT
IRMS(MAX)
Pesr IRMS2 (52mA)2 13.3µW
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
Input Capacitor
Input Ripple 50mV
AAT1112
7.3µF; 10µF 50mV 1.2MHz 1.5A
IRMS(MAX)
0.75Arms
IRMS2 (0.75A)2
AAT1112 Losses
Total losses estimated calculating dropout (VIN losses where power MOSFET RDS(ON) will maximum value. values assume 85°C ambient temperature 120°C junction temperature with TDFN 50°C/W package.
PLOSS IO12 RDS(ON)H 1.5A2 0.16 0.36W
TJ(MAX) TAMB PLOSS 85°C (50°C/W) 360mW 103°C
total losses also investigated nominal lithium-ion battery voltage (3.6V). simplified version RDS(ON) losses assumes that N-channel P-channel RDS(ON) equal.
PTOTAL RDS(ON) (tsw
1.5A2 152m (5ns 1.2MHz 1.5A 50A) 3.6V 375mW
TJ(MAX) TAMB PLOSS 85°C (50°C/W) 375mW 104°C
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
Inductance (µH)
AAT1112
VOUT
Part Number
CDRH4D28 CDRH4D28 CDRH4D28 CDRH4D28 CDRH4D28 SD3114-1.0 SD3114-1.0 SD3114-1.0
Manufacturer
Sumida Sumida Sumida Sumida Sumida Cooper Cooper Cooper
Size (mm)
5x5x3 5x5x3 5x5x3 5x5x3 5x5x3 3.1x3.1x1.45 3.1x3.1x1.45 3.1x3.1x1.45
Rated Current
1.57 2.04 2.56
IRMS
ISAT
36.4 23.2 20.4 20.4 17.5 0.042 0.042 0.042
1.67 1.67 1.67
2.07 2.07 2.07
Table Surface Mount Inductors.
Manufacturer
MuRata MuRata
Part Number
GRM21BR60J106KE19 GRM21BR60J226ME39
Value
10µF 22µF
Voltage
6.3V 6.3V
Temp.
Case
0805 0805
Table Surface Mount Capacitors.
1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter Ordering Information
Package
TSOPJW-12 TDFN33-12
AAT1112
Marking1
SBXYY
Part Number (Tape Reel)2
AAT1112ITP-0.6-T1 AAT1112IWP-0.6-T1
AnalogicTech products offered Pb-free packaging. term "Pb-free" means semiconductor products that compliance with current RoHS standards, including requirement that lead exceed 0.1% weight homogeneous materials. more information, please visit website
Package Information3
TSOPJW-12
0.10 0.05
0.20
2.40 0.10
0.50 0.50 0.50 0.50 0.50
2.85 0.20
3.00 0.10
0.9625 0.0375
0.04
0.15 0.05
0.10 1.00 0.065
0.055 0.045
0.010
0.45 0.15 2.75 0.25
dimensions millimeters.
assembly date code. Sample stock generally held part numbers listed BOLD. leadless package family, which includes QFN, TQFN, DFN, TDFN STDFN, exposed copper (unplated) lead terminals manufacturing process. solder fillet exposed copper edge cannot guaranteed required ensure proper bottom solder connection. 1112.2007.01.1.1
1.5A, 1.4MHz Step-Down Converter
TDFN33-12
Index Area Detail 0.43 0.05
AAT1112
3.00 0.05 2.40 0.05
Indicator (optional)
3.00 0.05
1.70 0.05
View
Bottom View Detail
0.75 0.05
0.05 0.05
Side View
dimensions millimeters.
Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility circuitry other than circuitry entirely embodied AnalogicTech product. circuit patent licenses, copyrights, mask work rights, other intellectual property rights implied. AnalogicTech reserves right make changes their products specifications discontinue product service without notice. Customers advised obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgement, including those pertaining warranty, patent infringement, limitation liability. AnalogicTech warrants performance semiconductor products specifications applicable time sale accordance with AnalogicTech's standard warranty. Testing other quality control techniques utilized extent AnalogicTech deems necessary support this warranty. Specific testing parameters each device necessarily performed. AnalogicTech AnalogicTech logo trademarks Advanced Analogic Technologies Incorporated. other brand product names appearing this document registered trademarks trademarks their respective holders.
Advanced Analogic Technologies, Inc.
Arques Avenue, Sunnyvale, 94085 Phone (408) 737-4600 (408) 737-4611
1112.2007.01.1.1
0.23 0.05
0.23 0.05
0.45 0.05

AAT1112 SwitchReg 1.5A step-down converter with input voltage range 2.

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