DATA SHEET AAT3174 High Current, High Efficiency Charge Pump General Description Features The AAT3174 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter. The device is ideal for multi-functional LED photo-flash applications where solution cost, size, and efficiency are critical. • • • • • • • • • • The AAT3174 is capable of driving a regulated output current up to 800mA. Output current levels can be easily programmed in 16 steps through Skyworks’ Simple Serial Control™ (S2Cwire™) interface controlled by a single microcontroller GPIO line. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The maximum output current can also be set with an external RSET resistor. Up to 800mA Output Current Tri-Mode 1X/1.5X/2X in Current Mode 16 Current Steps Set by S2Cwire External RSET to Set Maximum Current <1μA of Shutdown Small Application Circuit No Inductors Automatic Soft Start 12-Pin TDFN 3x3mm Package -40°C to +85°C Temperature Range Applications • • • • • The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency throughout the output current range for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and two small bypass capacitors at VIN and OUT), the AAT3174 is ideally suited for small battery-powered applications. Camcorders Camera Phones Digital Still Cameras PDAs and Notebook PCs Smart Phones The AAT3174 has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. The shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA. The AAT3174 is available in a Pb-free, thermally-enhanced 12-pin 3x3mm TDFN package and is specified over the -40°C to +85°C temperature range. Typical Application C1 1μF C1+ VIN (2.7V to 5.5V) Enable or S2Cwire C2 1μF C1- C2+ VIN C2OUT AAT3174 C IN 4.7μF EN/SET COUT 2.2μF Flash LED FL RSET GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 1 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Pin Descriptions Pin # Symbol 1 2 3 4 5 6 VIN C1+ C1GND FL RSET 7 EN/SET 8 9 10 N/C C2C2+ 11 OUT 12 EP VIN Function Input power supply pin. Requires 4.7μF bypass capacitor to ground. Flying capacitor C1 positive terminal. Connect a 1μF capacitor between C1+ and C1-. Flying capacitor C1 negative terminal. Ground connection. Controlled current sink. Connect the flash LED cathode to this pin. Connect resistor here to set maximum output current. Charge pump enable / set input control pin. When in the low state, the AAT3174 is powered down and consumes less than 1μA. When connected to logic high level, the AAT3174 charge pump is active. This pin should not be left floating. Not connected. Flying capacitor C2 negative terminal. Flying capacitor C2 positive terminal. Connect a 1μF capacitor between C2+ and C2-. Charge pump output. Requires 2.2μF bypass capacitor to ground. Connect to flash LED anode to drive the LED. Input power supply pin. Requires 4.7μF bypass capacitor to ground. Exposed paddle (bottom). Connect to GND directly beneath package. Pin Configuration TDFN33-12 (Top View) VIN C1+ C1GND FL RSET 2 1 12 2 11 3 10 4 9 5 8 6 7 VIN OUT C2+ C2N/C EN/SET Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Absolute Maximum Ratings1 TA = 25°C, unless otherwise noted. Symbol VIN VEN VEN(MAX) IOUT TJ TS TLEAD Description Input Voltage EN to GND Voltage Maximum EN to Input Voltage Maximum Output Current Operating Temperature Range Storage Temperature Range Maximum Soldering Temperature (at leads, 10 sec.) Value Units -0.3 to 6.0 -0.3 to 6.0 VIN + 0.3 1000 -40 to 150 -65 to 150 300 V V V mA °C °C °C Value Units 50 2.0 °C/W mW Thermal Information2 Symbol JA PD Description Thermal Resistance Maximum Power Dissipation 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. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 3 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Electrical Characteristics1 CIN = 4.7μF, COUT = 2.2μF, C1 = C2 = 1.0μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, VIN = 3.6V. Symbol Description Conditions Power Supply Input Voltage Range VIN ICC Operating Current ISHDN(MAX) IOUT(MAX)2 IDX TSS VRSET EN/SET VEN(L) VEN(H) TEN/SET LO TEN/SET HI TEN/SET HI MAX TOFF TLAT Input Current VIN Pin Shutdown Current Maximum Output Current Output Current Accuracy Soft-Start Time RSET Pin Voltage Enable Threshold Low Enable Threshold High EN/SET Low Time Minimum EN/SET High Time Maximum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage Min Typ 2.7 1X, No Load Current 3.0 ≤ VIN ≤ 5.5, 1.5X Mode, No Load Current 3.0 ≤ VIN ≤ 5.5, 2X Mode, No Load Current EN = 0 VF = 3.6V Programmed for 600mA; RSET = 187k 300 2.0 3.0 Max Units 5.5 V 4.0 6.0 1.0 μA 800 540 660 200 0.7 VIN = 2.7V VIN = 5.5V 0.4 1.4 0.3 60 50 -1 60 500 500 1 μA mA mA μs V V V μs ns μs μs μs μA 1. The AAT3174 is guaranteed to meet performance specifications from 0°C to 70°C. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization, and correlation with statistical process controls. 2. Mounted on an FR4 board. 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Typical Characteristics VIN = 3.6V, CIN = 4.7μF, COUT = 2.2μF, C1 = C2 = 1μF, TA = 25°C, unless otherwise noted. Efficiency vs. Supply Voltage Turn-On to 1X Mode (VIN = 4.2V; ILED = 150mA) 100 90 EN (2V/div) Efficiency (%) 80 70 ILED = 300mA 60 ILED = 150mA 50 40 VSINK (1V/div) 30 20 IIN (200mA/div) 10 0 VOUT (2V/div) 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 Time (200µs/div) Supply Voltage (V) Turn-On to 1.5X Mode Turn-On to 1X Mode (VIN = 3.2V; ILED = 150mA) (VIN = 4.2V; ILED = 600mA) EN (2V/div) EN (2V/div) VOUT (2V/div) VOUT (2V/div) VSINK (1V/div) VSINK (1V/div) IIN (200mA/div) IIN (500mA/div) Time (200µs/div) Time (200µs/div) Turn-On to 2X Mode Turn-Off from 1.5X Mode (VIN = 3.2V; ILED = 600mA) (VIN = 3.2V; ILED = 150mA) EN (2V/div) EN (2V/div) VOUT (2V/div) VF (1V/div) VSINK (1V/div) IIN (200mA/div) IIN (500mA/div) Time (200µs/div) Time (200µs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 5 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Typical Characteristics VIN = 3.6V, CIN = 4.7μF, COUT = 2.2μF, C1 = C2 = 1μF, TA = 25°C, unless otherwise noted. Operating Characteristic Operating Characteristic (VIN = 3.3V; 1.5X Mode; ILED = 300mA) (VIN = 2.9V; 2X Mode; ILED = 300mA) VIN (100mV/div) VIN (100mV/div) VOUT (200mV/div) VOUT (200mV/div) VSINK (200mV/div) VSINK (200mV/div) Time (2µs/div) Time (2µs/div) LED Current vs. RSET TLAT vs. VIN (Data = 1) 1000 160 900 140 800 120 TLAT (µs) ILED (mA) 700 600 500 400 300 100 85°C 80 60 40 200 20 100 0 100 25°C -40°C 0 200 300 400 500 600 700 800 900 1000 RSET (kΩ Ω) 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 Input Voltage (V) TOFF vs. VIN 180 160 TOFF (µs) 140 120 100 25°C -40°C 85°C 80 60 40 20 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 Input Voltage (V) 6 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Typical Characteristics VIN = 3.6V, CIN = 4.7μF, COUT = 2.2μF, C1 = C2 = 1μF, TA = 25°C, unless otherwise noted. VIH vs. VIN Over Temperature VIL vs. VIN Over Temperature 1.0 0.9 1.0 -40°C 0.9 0.7 0.6 0.8 25°C 85°C 0.5 VIL (V) VIH (V) 0.8 -40°C 0.7 0.6 25°C 85°C 0.5 0.4 0.4 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 Input Voltage (V) Input Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 7 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Functional Block Diagram C1+ C1- C2+ C2- VIN Charge Pump Section 1 Charge Pump Section 2 OUT 1MHz Oscillator Soft-Start Control FL EN/SET System Control; S2Cwire; Timing RSET GND Functional Description S2Cwire Serial Interface The AAT3174 is a high efficiency, low noise, dual stage tri-mode 1X/1.5X/2X charge pump device intended for photo-flash LED applications. The device requires only four external components: two ceramic capacitors for the charge pump flying capacitors, one ceramic capacitor for CIN, and one ceramic capacitor for COUT. The AAT3174 utilizes Skyworks single wire S2Cwire interface to enable/disable the charge pump and adjust the output current at 16 current levels. Each code defines the output current to be a percentage of the maximum current set by the resistor at the RSET pin (see Table 1). The charge pump is designed to deliver regulated load currents up to 800mA. The dual stage charge pump section contains soft-start circuitry to prohibit excessive inrush current during start-up. System efficiency is maximized with a tri-mode, dual stage charge pump topology. The internal clock oscillator at 1MHz allows the use of small external components. The tri-mode charge pump operation further optimizes power conversion efficiency. Depending upon the variance of load current (at different modes), input voltage, and nominal LED forward voltage, the charge pump will operate in a 1X, 1.5X, or 2X mode to generate the output voltage required to power the load for a given controlled constant current. This results in significant power savings over voltage doubling architectures, especially when the LEDs are also operated at lower current levels in movie, viewing, or flashlight modes. 8 Data Total Output (% of IMAX) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 100.0 89.1 79.4 70.8 63.1 56.2 50.1 44.7 39.8 35.5 31.6 28.2 25.1 22.4 20.0 0.0 Table 1: Current Level Settings. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump S2Cwire Serial Interface Timing THI TLO TOFF T LAT EN/SET 1 2 n ≤ 16 n-1 0 Data Reg n 0 Application Information The S2Cwire interface records rising edges of the EN/SET pin and decodes them into 16 individual current level settings with Code 1 reserved for maximum current. Once EN/SET has been held in the logic high state for time TLAT, the programmed current is seen at the current source outputs and the internal data register is reset to 0. For subsequent current level programming, the number of rising edges corresponding to the desired code must be entered on the EN/SET pin. Flash/Torch Control Using the RSET Pin An alternative method can be used for flash/torch control that eliminates the need to use the S2Cwire singlewire interface. By using any typical digital I/O port, an additional enable can be created (see Figure 1). The I/O port output configuration can be any one of opendrain NMOS, open-drain PMOS, or push-pull type. The control will always act as an active-low flash enable or, equivalently, an active-high torch enable (see Table 2). When EN/SET is held low for an amount of time greater than TOFF, the AAT3174 enters into shutdown mode and draws less than 1μA from VIN. Data and address registers are reset to 0 during shutdown. EN ENFL Mode 0 0 1 1 0 1 0 1 Off Off Flash Torch Table 2: Flash/Torch Control Modes. C1 1μF C1+ 2.7V to 5.5V C2 1μF C1- C2+ VIN CIN 4.7μF EN C2VOUT COUT 2.2μF AAT 3174 Flash LED F1 EN/SET R2 RSET ENFL GND R1 Figure 1: Flash/Torch Control Using the RSET Pin. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 9 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump According to I/O port type, the following equations can be used to calculate appropriate resistor values. For an open-drain NMOS I/O port output configuration, the line is pulled low to GND or left floating, according to state. To calculate the appropriate R1 and R2 resistor values, first calculate the R1 resistor value needed for the desired torch level LED current: Next, choose R2 based on the desired flash level LED current: R1 · 600mA · 187kΩ R1 · ILED (flash) - 600mA · 187kΩ For examples of standard 1% values where the LED flash current level is targeted for 700mA, see Table 3. R1 (kΩ) R2 (kΩ) ILED Torch (mA) ILED Flash (mA) 920 732 649 562 193 205 210 223 122 153 173 200 703 701 707 703 Table 3: Open-Drain I/O Example Resistor Values. If the I/O port must be configured as an open-drain PMOS type output, the appropriate equations can be generated from these same concepts. As done in the previous example, the necessary values can then be calculated. As a reference, the equations applicable to the PMOS case are: 600mA · 187kΩ ILED (flash) VIO -1 0.7 R2 = ILED (torch) 1 R1 600mA · 187kΩ 10 600mA · 187kΩ ILED (flash) Next, choose a reasonable value for R1. A value that is slightly larger than RSET, calculated from above, is appropriate. Calculate R2 and then calculate the torch mode current level that results: R2 = The current and resistance values used in the equations come from the conditions placed on the IDX parameter of the Electrical Characteristics table. R1 = For a push-pull I/O port output configuration, first calculate the overall RSET value needed for the desired flash level LED current: RSET = 600mA · 187kΩ R1 = ILED (torch) R2 = The value to use for VIO must come from the I/O supply voltage used in the system. 0.7V is the typical value of the VRSET parameter found in the Electrical Characteristics. RSET · R1 R1 - RSET ILED (torch) = 600mA · 187kΩ · VIO ⎞ ⎛ R2 - R1 ⎝ R1 · R2 0.7V · R2 ⎠ Once again, the current and resistance values used in the equations come from the conditions placed on the IDX parameter of the Electrical Characteristics table. 0.7V is the typical value for the VRSET parameter. The value to use for VIO must come from the I/O supply voltage used in the system. Example standard 1% values are provided in Table 4. R1 (kΩ) R2 (kΩ) ILED Torch (mA) ILED Flash (mA) 169 165 162 160 1000 1000 1000 1000 95 111 124 132 776 792 805 813 Table 4: Push-Pull I/O Example Resistor Values. In all of the approaches mentioned, the open-drain NMOS or PMOS type configurations offer the most flexibility for current level selection. When configured as an output, if the I/O port is only push-pull type, then the equivalent open-drain NMOS can also be realized. To realize this, activate the port as output only when driving the line low. Otherwise, to release the line, set the port to be tri-stated. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Device Power Efficiency LED Selection The AAT3174 power conversion efficiency depends on the charge pump mode. By definition, device efficiency is expressed as the output power delivered to the LED divided by the total input power consumed. The AAT3174 is designed to drive high-intensity white LEDs. It is particularly suitable for LEDs with an operating forward voltage in the range of 4.2V to 1.5V. η= POUT PIN When the input voltage is sufficiently greater than the LED forward voltage, the device optimizes efficiency by operating in 1X mode. In 1X mode, the device is working as a bypass switch and passing the input supply directly to the output. The power conversion efficiency can be approximated by, η= VF · ILED VF ≈ VIN · IIN VIN Due to the very low 1X mode quiescent current, the input current nearly equals the current delivered to the LED. Further, the low-impedance bypass switch introduces negligible voltage drop from input to output. The AAT3174 further maintains optimized performance and efficiency by detecting when the input voltage is not sufficient to sustain LED current. The device automatically switches to 1.5X mode when the input voltage drops too low in relation to the LED forward voltage. In 1.5X mode, the output voltage can be boosted to 3/2 the input voltage. The 3/2 conversion ratio introduces a corresponding 1/2 increase in input current. For ideal conversion, the 1.5X mode efficiency is given by: VF VF · ILED η= = VIN · 1.5IIN 1.5 · VIN Similarly, when the input falls further, such that 1.5X mode can no longer sustain LED current, the device will automatically switch to 2X mode. In 2X mode, the output voltage can be boosted to twice the input voltage. The doubling conversion ratio introduces a corresponding doubling of the input current. For ideal conversion, the 2X mode efficiency is given by: η= VF VF · ILED = VIN · 2IIN 2 · VIN The charge pump device can also drive other loads that have similar characteristics to white LEDs. For various load types, the AAT3174 provides a high-current, programmable ideal constant current source. Capacitor Selection Careful selection of the four external capacitors CIN, 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 general, low ESR may be defined as less than 100m. A value of 1μF for the flying capacitors is a good starting point when choosing capacitors. If the LED current sinks are only programmed for light current levels, then the capacitor size may be decreased. Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the AAT3174. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor typically has very low ESR, is lowest cost, has a smaller PCB footprint, and is nonpolarized. 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 connections, size or area, material composition, and ambient temperature. Capacitor ESR is typically measured in milliohms 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 generally have tight tolerance and are very stable over temperature. Larger capacitor values are usually composed of X7R, X5R, Z5U, or Y5V dielectric materials. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 11 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Large ceramic capacitors are often available in lowercost dielectrics, but capacitors greater than 4.7μF are not typically required for AAT3174 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 AAT3174 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 shortcircuit of the OUT pin. The PCB area directly underneath the package should be plated so that the exposed paddle can be mated to the top layer PCB copper during the re-flow process. This area should also be connected to the top layer ground pour when available. Further, multiple copper plated thru-holes should be used to electrically and thermally connect the top surface paddle area to additional ground plane(s) and/or the bottom layer ground pour. The chip ground is internally connected to both the paddle and the GND pin. The GND pin conducts large currents and it is important to minimize any differences in potential that can result between the GND pin and exposed paddle. It is good practice to connect the GND pin to the exposed paddle area using a trace as shown in Figure 2. PCB Layout To achieve adequate electrical and thermal performance, careful attention must be given to the PCB layout. In the worst-case operating condition, the chip must dissipate considerable power at full load. Adequate heat-sinking must be achieved to ensure intended operation. Figure 2 illustrates an example of an adequate PCB layout. The bottom of the package features an exposed metal paddle. The exposed paddle acts, thermally, to transfer heat from the chip and, electrically, as a ground connection. The junction-to-ambient thermal resistance (JA) for the package can be significantly reduced by following a couple of important PCB design guidelines. 12 Figure 2: Example PCB Layout. The flying capacitors C1 and C2 should be connected close to the chip. Trace length should be kept short to minimize path resistance and potential coupling. The input and output capacitors should also be placed as close to the chip as possible. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump Ordering Information Package Marking1 Part Number (Tape and Reel)2 TDFN33-12 RSXYY AAT3174IWP-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 TDFN33-123 Index Area 0.43 ± 0.05 0.1 REF C0.3 0.45 ± 0.05 2.40 ± 0.05 3.00 ± 0.05 Detail "A" 3.00 ± 0.05 1.70 ± 0.05 Top View Bottom View 0.23 ± 0.05 Pin 1 Indicator (optional) 0.05 ± 0.05 0.23 ± 0.05 0.75 ± 0.05 Detail "A" Side View All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 13 DATA SHEET AAT3174 High Current, High Efficiency Charge Pump 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. Skyworks 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 hereunder, 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, INCLUDING 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 environmental 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 published 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. 14 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202100A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012