AAT3142 SKYWORKS

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
  • PDF pages: 14

Technical content

Features

  • V IN Range: 2.7V to 5.5V
  • Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage
  • Drives Low-VF and High-VF Type LEDs
  • Up to Three 30mA Outputs
  • 32-Position Logarithmic Scale with Digital Control
  • Low Noise Constant Frequency Operation
  • 1MHz Switching Frequency
  • Small Application Circuit
  • Regulated Output Current
  • Automatic Soft Start
  • No Inductors
  • I Q < 1µA in Shutdown
  • 12-Pin TSOPJW Package

Applications

  • Color (RGB) Lighting
  • Programmable Current Sources
  • White LED Backlighting
  • White Photo Flash for Digital Still Cameras Typical Application CIN 1µF VBATTERY CCP 1µF EN/SET 1µF 1µF D3 D2 D1 VIN CP C1+ C1- C2+ C2- EN/SET GND AAT3142

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Pin Descriptions Pin # Symbol Function 1 C2+ Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-. 2 CP Charge pump output. Requires 1µF capacitor connected between this pin and ground. 3 C1- Flying capacitor 1 negative terminal. 4 C1+ Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-. 5 D3 Current source output #3. 6 D2 Current source output #2. 7 GND Ground pin; must be connected to Pin 11. 8 D1 Current source output #1. 9 EN/SET S2Cwire serial interface control pin. 10 IN Input power supply. Requires 1µF capacitor connected between this pin and ground. 11 GND Ground pin; must be connected to Pin 7. 12 C2- Flying capacitor 2 negative terminal. Pin Configuration TSOPJW-12 (Top View) C2+ CP C1- C1+ C2- GND IN EN/SET GND

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications 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. Based on long-term current density limitation. 3. Mounted on an FR4 board. 4. Derate 6.25mW/°C above 25°C. Absolute Maximum Ratings1 Symbol Description Value Units VIN Input Voltage -0.3 to 6 V VEN/SET EN/SET to GND Voltage -0.3 to VIN + 0.3 V IOUT2 Maximum DC Output Current 150 mA TJ Operating Junction Temperature Range -40 to 150 °C Thermal Information3 Symbol Description Value Units PD Maximum Power Dissipation4 625 mW qJA Thermal Resistance 160 °C/W

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications 1. The AAT3142 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla - tion with statistical process controls. 2. Codes 2 through 7 are guaranteed to be within ±15% of stated current level. 3. Current matching is defined as I(D-Match) = (ID - IAVE)/IAVE. Electrical Characteristics1 CIN = CCP = C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C, VIN = 3.5V. Symbol Description Conditions Min Typ Max Units Input Power Supply VIN Operation Range 2.7 5.5 V Icc Operating Current VD1:D3 = 2.0V, CP = 1X 550 µA No Load Current, CP = 1.5X 3 5 mA ISHDN Shutdown Current VIN = 3.5V, EN/SET = 0 1 µA IDX Output Current Accuracy2 VIN = 3.5V, TA = 25°C -10 10 % I(D-Match) Current Matching3 VD1:D3 = 3.6V, VIN = 3.5V -3 ±0.5 3 % hCP Charge Pump Section Efficiency VIN = 3.5V, IOUT(TOTAL) = 90mA, Measured from IN to CP 93 % Charge Pump Section TSS Soft-Start Time 50 µs FCLK Clock Frequency 1 MHz EN/SET VEN(L) Enable Threshold Low VIN = 2.7V 0.4 V VEN(H) Enable Threshold High VIN = 5.5V 1.4 V TEN/SET LO EN/SET Low Time 0.3 75 µs TEN/SET HI MIN Minimum EN/SET High Time 50 ns TEN/SET HI MAX Maximum EN/SET High Time 75 µs TOFF EN/SET Off Timeout 500 µs TLAT EN/SET Latch Timeout 500 µs IEN/SET EN/SET Input Leakage VEN/SET = 5.5V, VIN = 5.5V -1 1 µA

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics VIN = 3.5V, CIN = CCP = C1 = C2 = 1µF, TA = 25°C, unless otherwise noted. Input Voltage (V) Efficiency (%) Efficiency vs. Input Voltage (Code 26) 100 3.5VF 3.0VF Efficiency vs. Input Voltage Input Voltage (V) Efficiency (%) 100 Code 32 Code 28 Code 26 Input Voltage (V) Efficiency (%) Efficiency vs. Input Voltage 100 Code 32 Code 28 Code 26 Turn-On to 1X Mode (3x19mA Load) Time (100µs/div) EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) Turn-On to 1X Mode (3x30mA Load) Time (100µs/div) EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) Turn-On to 1.5X Mode (3x19mA Load) Time (100µs/div) EN/SET (2V/div) V CP (4V/div) VDIODE (2V/div) IIN (100mA/div)

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics VIN = 3.5V, CIN = CCP = C1 = C2 = 1µF, TA = 25°C, unless otherwise noted. Turn-On to 1.5X Mode (3x30mA Load) Time (100µs/div) EN/SET (2V/div) VCP (4V/div) VDIODE (2V/div) IIN (100mA/div) Turn-Off from Full-Scale 2X Mode Time (200µs/div) EN/SET (2V/div) VDIODE (2V/div) IIN (200mA/div) Charge Pump to Load Switch (1.5X Mode, 3x19mA Load) Time (5ms/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div) Charge Pump to Load Switch (1.5X Mode, 3x30mA Load) Time (5ms/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div) Charge Pump to Load Switch (2X Mode, 3x19mA Load) Time (5ms/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div) Charge Pump to Load Switch (2X Mode, 3x30mA Load) Time (5ms/div) VIN (500mV/div) VCP (1V/div) VDIODE (500mV/div) IIN (50mA/div)

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics VIN = 3.5V, CIN = CCP = C1 = C2 = 1µF, TA = 25°C, unless otherwise noted. Load Switch to Charge Pump (1.5X Mode, 3x19mA Load) Time (2ms/div) VIN (1V/div) VCP (4V/div) VDIODE (500mV/div) IIN (50mA/div) Load Switch to Charge Pump (1.5X Mode, 3x30mA Load) Time (2ms/div) VIN (1V/div) VCP (4V/div) VDIODE (500mV/div) IIN (50mA/div) Line Response (1X Mode, 3x19mA Load) Time (1ms/div) VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div) Line Response (1X Mode, 3x30mA Load) Time (1ms/div) VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div) Line Response (1.5X Mode, 3x19mA Load) Time (1ms/div) VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div) Line Response (1.5X Mode, 3x30mA Load) Time (1ms/div) VIN (0.5V/div) VLED (20mV/div) VCP (0.5V/div) ID (10mA/div)

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Typical Characteristics VIN = 3.5V, CIN = CCP = C1 = C2 = 1µF, TA = 25°C, unless otherwise noted. Load Characteristics (1.5X Mode, 3x15mA Load) Time (1µs/div) VIN (20mV/div) IIN (10mA/div) VCP (20mV/div) Load Characteristics (1.5X Mode, 3x30mA Load) Time (1µs/div) VIN (20mV/div) IIN (10mA/div) VCP (20mV/div) Input Voltage (V) IIN (mA) Input Current vs. Input Voltage (3x10mA) VDIODE = 3.4V VDIODE = 3.0V Input Voltage (V) IIN (mA) Input Current vs. Input Voltage (3x30mA) 100 120 140 160 180 200 VDIODE = 3.0V VDIODE = 3.4V Input Voltage (V) IDIODE (mA) Diode Current vs. Input Voltage (30mA, 15mA Settings) VDIODE = 3.4V VDIODE = 3.4V VIH and VIL vs. VIN Input Voltage (V) 0.600 0.625 0.650 0.675 0.700 0.725 0.750 0.775 0.800 0.825 0.850 VIH VIL

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Functional Description The AAT3142 is a tri-mode load switch (1X) and high efficiency (1.5X or 2X) charge pump device intended for white LED backlight applications. To maximize power conversion efficiency, an internal sensing circuit moni - tors the voltage required on each constant current source output and sets the load switch and charge pump modes based on the input battery voltage and the cur - rent source output voltage. As the battery discharges over time, the AAT3142 charge pump is enabled when any of the three current source outputs nears dropout. The charge pump initially starts in 1.5X mode. If the charge pump output drops enough for any current source output to become close to dropout, the charge pump will automatically transition to 2X mode. Each of the three current source outputs is independently switched between the battery input (1X) or the charge pump output (1.5X or 2X), depending on the voltage at the current source output. Since the LED-to-LED forward voltage (VF) can vary as much as 1V, this function sig - nificantly enhances overall device efficiency when the battery input voltage level is greater than the voltage required at any current source output. The AAT3142 requires only four external components: two 1µF ceramic capacitors for the charge pump flying capacitors (C1 and C2), one 1µF ceramic input capacitor (CIN), and one 0.33µF to 1µF ceramic charge pump out - put capacitor (C CP). The three constant current outputs (D1 to D3) drive three individual LEDs with a maximum current of 30mA each. The EN/SET S 2Cwire serial inter- face enables the AAT3142 and sets the current source magnitudes. Functional Block Diagram 1.5X Charge Pump Soft-Start Control 1MHz Oscillator Voltage Reference 32 x 8 bit ROM C1+ C1- C2+ C2- CP GND EN/SET VIN S2Cwire Interface D/A D/A D/A

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Applications Information Constant Current Output Level Settings The constant current source amplitudes for D1 to D3 are set via the serial interface according to a logarithmic scale where each code is 1dB greater than the previous code. In this manner, LED brightness appears linear with each increasing code count. Because the outputs D1 to D3 are true independent constant current sources, the voltage observed on any single given output will be determined by the actual forward voltage (V F) for the LED being driven. Since the output current of the AAT3142 is program - mable, no PWM (pulse width modulation) or additional control circuitry are needed to control LED brightness. This feature greatly reduces the burden on a microcon - troller or system IC to manage LED or display bright - ness, allowing the user to “set it and forget it.” With its high-speed serial interface (1MHz data rate), the output current of the AAT3142 can be changed successively to brighten or dim LEDs in smooth transitions (e.g., to fade out) or in abrupt steps, giving the user complete pro - grammability and real-time control of LED brightness. The individual current level settings are each approxi - mately 1dB apart for settings above Code 8 (see Figure 1). The current level settings below Code 8 are more than 1dB apart and serve the needs of transmissive dis- plays and other low-current applications. Normalized Current Level Settings 0.00 0.01 0.10 1.00 123456 789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Code Current (mA) Figure 1: Normalized Current Level Settings. Code IOUT (typ) (mA) Code IOUT (typ) (mA) Code IOUT (typ) (mA) Code IOUT (typ) (mA) 1 0.0 9 2.0 17 5.1 25 13 2 0.1 10 2.2 18 5.6 26 15 3 0.2 11 2.5 19 6 27 17 4 0.4 12 2.8 20 7 28 19 5 0.5 13 3.2 21 8 29 21 6 0.7 14 3.5 22 9 30 24 7 1.1 15 4.0 23 10 31 27 8 1.8 16 4.5 24 12 32 30 Table 1: Constant Current Source Output Nominal Programming Levels.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications S2Cwire Serial Interface The current source output magnitude is controlled by the EN/SET pin, using Skyworks' S 2Cwire interface. The interface records rising edges of the EN/SET pin and decodes them into 32 individual current level settings with Code 1 reserved for no current. Once EN/SET has been held in the logic high state for time T LAT, the pro - grammed current is seen at the current source outputs, and the internal data register is reset to 0. For subse - quent current level programming, the number of rising edges corresponding to the desired code must be entered on the EN/SET pin. When EN/SET is held low for an amount of time greater than TOFF, the AAT3142 enters into shutdown mode and draws less than 1µA from V IN. The internal data register is reset to 0 during shutdown. LED Selection The AAT3142 is specifically intended for driving white LEDs. However, the device design will allow the AAT3142 to drive most types of LEDs with forward voltage speci - fications ranging from 1.0V to 4.3V. LED applications may include main and sub-LCD display backlighting, camera photo-flash applications, color (RGB) LEDs, infrared (IR) diodes for remotes, and other loads benefit- ing from a controlled output-current generated from a varying input-voltage. Since the D1 to D3 output current sources are matched with negligible voltage depen - dence, the LED brightness will be matched regardless of the specific LED forward voltage (VF) levels. In some instances (e.g., in high luminous output applica- tions such as photo flash), it may be necessary to drive high-VF type LEDs. The low-dropout current sources in the AAT3142 make it capable of driving LEDs with for - ward voltages as high as 4.3V at full current from an input supply as low as 3.0V. Outputs can be paralleled to drive high-current LEDs without complication. Termination of Unused Current Source Outputs If any outputs (D1 to D3) are not used, they should be terminated by connecting the respective unused output directly to ground. This is required to assure correct charge pump mode operation. If a given unused output is not terminated to ground, it will appear to the respec- tive output’s feedback control as an infinite impedance load and the unused constant current source will be set for a maximum voltage. Although no current flows from the unused current source, the voltage sensed at that node could force the charge pump control to activate the charge pump when it is not necessary. To prevent this effect, simply connect the unused constant current source outputs to ground. Device Switching Noise Performance The AAT3142 operates at a fixed frequency of approxi - mately 1MHz to control noise and limit harmonics that can interfere with the RF operation of cellular telephone handsets or other communication devices. Back-injected noise appearing on the input pin of the charge pump is 20mV peak-to-peak, typically ten times less than induc- tor-based DC/DC boost converter white LED backlight solutions. The AAT3142 soft-start feature prevents noise transient effects associated with inrush currents during start-up of the charge pump circuit. Power Efficiency and Device Evaluation The charge pump efficiency discussion in the following sections only accounts for efficiency of the charge pump section itself. Due to the unique circuit architecture and design of the AAT3142, it is very difficult to measure efficiency in terms of a percent value comparing input power over output power. S2Cwire Serial Interface Timing EN/SET 2 n-1 n <= 32 Data Reg 0n 0 THI TLO TLAT TOFF

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Since the AAT3142 outputs are pure constant current sources and typically drive individual loads, it is difficult to measure the output voltage for a given output (D1 to D3) to derive an overall output power measurement. For any given application, white LED forward voltage levels can differ, yet the output drive current will be maintained as a constant. This makes quantifying output power a difficult task when taken in the context of comparing to other white LED driver circuit topologies. A better way to quantify total device efficiency is to observe the total input power to the device for a given LED current drive level. The best white LED driver for a given application should be based on trade-offs of size, external component count, reliability, operating range, and total energy usage...not just % efficiency. The AAT3142 efficiency may be quantified under very specific conditions and is dependent upon the input volt- age versus the output voltage seen across the loads applied to outputs D1 through D3 for a given constant current setting. Depending upon the case of V IN being greater than the specific voltage seen across the loads on D1 through D3, the device will operate in load switch mode. If the voltage seen on the constant current source output is less than V IN, then the device will operate in 1.5X or 2X charge pump mode. Each of these modes will yield different efficiency values. Refer to the following two sections for explanations of each operational mode. Load Switch Mode Efficiency The AAT3142 load switch mode is operational at all times and functions alone to enhance device power conversion efficiency when V IN is greater than voltage across the load connected to the constant current source outputs. When in load switch mode, the voltage conversion effi - ciency is defined as output power divided by input power: η = POUT PIN The expression to define the ideal efficiency ( h) can be rewritten as: η = POUT = VOUT /uni2219 IOUT = VOUT PIN VIN /uni2219 IOUT VIN -or- η(%) = 100 VOUT VIN Charge Pump Section Efficiency The AAT3142 contains a fractional charge pump which will boost the input supply voltage when V IN is less than the voltage required on the constant current source out- puts. The efficiency (h) can be simply defined as a linear voltage regulator with an effective output voltage that is equal to one and one half or two times the input voltage. Efficiency (h) for an ideal 1.5X charge pump can typi - cally be expressed as the output power divided by the input power: η = POUT PIN In addition, with an ideal 1.5X charge pump, the output current may be expressed as 2/3 of the input current. The expression to define the ideal efficiency ( h) can be rewritten as: η = POUT = VOUT /uni2219 IOUT = VOUT PIN VIN /uni2219 1.5IOUT 1.5VIN -or- η(%) = 100 VOUT 1.5VIN For a charge pump with an output of 5V and a nominal input of 3.5V, the theoretical efficiency is 95%. Due to internal switching losses and IC quiescent current con - sumption, the actual efficiency can be measured at 93%. These figures are in close agreement for output load conditions from 1mA to 100mA. Efficiency will decrease as load current drops below 0.05mA or when the level of V IN approaches V OUT. Refer to the Typical Characteristics section of this datasheet for measured plots of efficiency versus input voltage and output load current for the given charge pump output voltage options.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Capacitor Selection Careful selection of the four external capacitors C IN, C1, C2, and COUT is important because they will affect turn-on time, output ripple, and transient performance. Optimum performance will be obtained when low equivalent series resistance (ESR) ceramic capacitors are used. In gener - al, low ESR may be defined as less than 100mW. A value of 1µF for all four capacitors is a good starting point when choosing capacitors. If the LED current sources are only programmed for light current levels, then the capacitor size may be decreased. Capacitor Characteristics Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the AAT3142. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor has very low ESR, is lowest cost, has a smaller PCB footprint, and is non-polarized. Low ESR ceramic capacitors help maximize charge pump transient response. Since ceramic capacitors are non-polarized, they are not prone to incorrect connection damage. Equivalent Series Resistance ESR is an important characteristic to consider when selecting a capacitor. ESR is a resistance internal to a capacitor that is caused by the leads, internal connec - tions, size or area, material composition, and ambient temperature. Capacitor ESR is typically measured in mil- liohms for ceramic capacitors and can range to more than several ohms for tantalum or aluminum electrolytic capacitors. Ceramic Capacitor Materials Ceramic capacitors less than 0.1µF are typically made from NPO or C0G materials. NPO and C0G materials have tight tolerance and are stable over temperature. Large capacitor values are typically composed of X7R, X5R, Z5U, or Y5V dielectric materials. Large ceramic capacitors, greater than 2.2µF, are often available in low- cost Y5V and Z5U dielectrics, but capacitors greater than 1µF are usually not required for AAT3142 applications. Capacitor area is another contributor to ESR. Capacitors that are physically large will have a lower ESR when compared to an equivalent material smaller capacitor. These larger devices can improve circuit transient response when compared to an equal value capacitor in a smaller package size. Thermal Protection The AAT3142 has a thermal protection circuit that will shut down the charge pump if the die temperature rises above the thermal limit, as is the case during a short- circuit of the CP pin. Charge Pump Compatibility The three-output AAT3142 is pin-compatible with the AAT3140, AAT3123, and AAT3113 in TSOPJW-12 pack - ages. The AAT3142 offers an improved overall efficiency, wider operating range, and the ability to drive high-V F type LEDs at full current. The AAT3142 is well suited for battery-powered applications using single-cell lithium- ion/polymer batteries and 3-series connected dry cells (3.6V).

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202141A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 6, 2012 AAT3142 DATA SHEET High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky - works may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here- under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN - CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en- vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub- lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD.

Ordering Information

Package Marking1 Part Number (Tape and Reel)2 TSOPJW-12 PJXYY AAT3142ITP-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074.

Package Information

0.20 + 0.10 - 0.05 0.055 ± 0.045 0.45 ± 0.15 7° NOM 4° ± 4° 3.00 ± 0.10 2.40 ± 0.10 2.85 ± 0.20 0.15 ± 0.05 0.9625 ± 0.0375 1.00 + 0.10 - 0.065

0.04 REF

0.010 2.75 ± 0.25 All dimensions in millimeters.