AAT3112IVN-4.5-T1

AAT3112 SKYWORKS | Alldatasheet

Document overview

• Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
• PDF pages: 15

Technical content

Features

• Input Voltage Range: ▪ AAT3112-5.0: 2.7V to 5.0V ▪ AAT3112-4.5: 2.7V to 4.5V
• Up to 500mA Peak Output Current
• 200mA Continuous Output Current
• I Q <1μA in Shutdown
• Regulated 4.5V or 5.0V Output
• 26 μA of Quiescent Current
• Small Application Circuit
• Automatic Soft Start
• No Inductors
• Short-Circuit/Over-Temperature Protection
• 16-Pin 3x3mm QFN Package
• Temperature Range: -40°C to +85°C

Applications

• General-Purpose High-Current Boost Supply
• White LED Backlighting
• White LED Photo Flash Typical Application AAT3112 C1+ C1- C2+ C2- C1 = 1μF C2 = 1μF EN1 EN2 Enable Light Enable Flash D1 D2 D3 D4 VOUT1 VOUT2 VIN COUT RBGND CIN VIN

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Pin Descriptions Pin # Symbol Function 1, 4, 8, 12 N/C No connect. 2 C2+ Flying capacitor 2 positive terminal. Connect 1 μF capacitor between C2+ and C2-. 3 C2- Flying capacitor 2 negative terminal. 5 VIN Input voltage. Connect to Pin 11. 6 GND Ground connection. 7 EN2 Enable pin. When connected high, Charge Pump 2 is enabled. When connected low, this pin disables the charge pump. 9 EN1 Enable pin. When connected high, Charge Pump 1 is enabled. When connected low, this pin disables the charge pump. 10 GND Ground connection. 11 VIN Input voltage. Connect to Pin 5. 12 VOUT1 Output pin for regulated output voltage. Bypass this pin to ground with a low ESR 10 μF capacitor. 14 C1+ Flying capacitor 1 positive terminal. Connect 1 μF capacitor between C1+ and C1-. 15 C1- Flying capacitor 1 negative terminal. 16 VOUT2 Regulated output voltage 2. Must be connected to V OUT1 for higher current applications. If used separate- ly, bypass this pin to ground with a low ESR 10μF capacitor. EP Exposed paddle (bottom); connect to GND directly beneath package. Pin Configuration QFN33-16 (Top View) VOUT1 VIN GND VOUT2 N/C C2+ C2- GNDVIN EN2 N/C EN1 N/C C1+ C1- N/C

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Absolute Maximum Ratings1 Symbol Description Value Units VIN Input Voltage -0.3 to 6 V VOUT Charge Pump Output -0.3 to 6 V VEN EN to GND Voltage -0.3 to 6 V TJ Operating Junction Temperature Range -40 to 150 °C TLEAD Maximum Soldering Temperature (at leads, 10 sec) 300 °C Thermal Information Symbol Description Value Units PD Maximum Power Dissipation 2.0 W JA Maximum Thermal Resistance2 50 °C/W 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at c onditions 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.

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Electrical Characteristics1 VIN = 3.3V, V OUT = 5.0V, C IN = C OUT = 10 μF, C1 = C 2 = 1.0 μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol Description Conditions Min Typ Max Units AAT3112-4.5 Input Power Supply VIN Operation Range 2.7 4.5 V IQ Quiescent Current2 2.7 ≤ VIN ≤ 4.5, IOUT = 0mA; EN1 = EN2 = VIN 26 60 μA ISHDN Shutdown Current EN1 = EN2 = 0 1.0 μA IOUT Pulsed Output Current V IN = 3.6V; VOUT = 4.0V; TPULSE = 50ms 590 mA VIN = 3.6V; VOUT = 4.0V; TPULSE = 500ms 500 Charge Pump Section FCLK Clock Frequency 750 kHz CP Charge Pump Effi ciency V IN = 2.7V; IOUT = 100mA 80 % EN VEN(L) Enable Threshold Low 0.3 V VEN(H) Enable Threshold High 1.4 V IEN EN Input Leakage -1.0 1.0 μA AAT3112-5.0 Input Power Supply VIN Operation Range 2.7 5.0 V IQ Quiescent Current2 2.7 ≤ VIN ≤ 5.0, IOUT = 0mA; EN1 = EN2 = VIN 26 60 μA ISHDN Shutdown Current EN1 = EN2 = 0 1.0 μA IOUT Pulsed Output Current V IN = 3.6V; VOUT = 4.5V; TPULSE = 50ms 600 mA VIN = 3.6V; VOUT = 4.5V; TPULSE = 500ms 500 Charge Pump Section FCLK Clock Frequency 750 kHz CP Charge Pump Effi ciency V IN = 2.7V; IOUT = 100mA 85 % EN VEN(L) Enable Threshold Low 0.3 V VEN(H) Enable Threshold High 1.4 V IEN EN Input Leakage -1.0 1.0 μA 1. The AAT3112 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assu red by design, characterization, and correla- tion with statistical process controls. 2. VOUT1 and VOUT2 are pulled high to prevent switching.

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. VIN vs. VIH 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 Input Voltage (V) VIH (V) 85°C 25°C -40°C VIN vs. VIL 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 Input Voltage (V) VIL (V) -40°C 85°C 25°C VSHDN Threshold vs. Input Voltage 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 Input Voltage (V) VSHDN Threshold (V) VIH VIL

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-4.5V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Output Voltage vs. Output Current Output Current (mA) Output Voltage (V) 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 0 50 100 150 200 250 300 VIN = 3.9VVIN = 3.6V VIN = 4.2V Supply Current vs. Supply Voltage (No Load, No Switching) Supply Voltage (V) Supply Current (μμA) Startup Time with 100mA Load Time (50µs/div) EN (2V/div) VOUT (1V/div) Startup Time with 200mA Load Time (50µs/div) EN (2V/div) VOUT (1V/div) Maximum Current Pulse vs. Input Voltage (50ms pulse; VOUT > 4.0V) Input Voltage (V) Maximum Current Pulse (mA)300 400 500 600 700 800 Efficiency vs. Input Voltage Input Voltage (V) Efficiency (%) 2.7 50mA 100mA 200mA

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-4.5V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Load Transient Response (VIN = 3.0V) Time (50µs/div) IOUT (200mA/div) VOUT (20mV/div) Load Transient Response (VIN = 4.2V) Time (50µs/div) IOUT (200mA/div) VOUT (20mV/div) Input and Output Ripples (IOUT = 50mA @ VIN = 3.5V) Time (5µs/div) VOUT AC Coupled (20mV/div) VIN AC Coupled (20mV/div) Input and Output Ripples (IOUT = 100mA @ VIN = 3.5V) Time (5µs/div) VOUT AC Coupled (20mV/div) VIN AC Coupled (20mV/div) Output Current vs. Input Voltage (500ms Pulse Time; VOUT > 4.0V) Input Voltage (V) Output Current (mA) 100 200 300 400 500 600 700 800 2.5 3 3.5 4 4.5 Output Current vs. Input Voltage (70°C) (VOUT > 4.0V) Input Voltage (V) Output Current (mA) 100 200 300 400 500 600 700 800 50ms 100ms 200ms 300ms 500ms

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-4.5V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Output Voltage vs. Input Voltage for Pulsed High Current (IOUT = 500mA) Input Voltage (V) Output Voltage (V) 0.5 1.5 2.5 3.5 4.5 500ms Pulse 50ms Pulse

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-5.0V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Output Voltage vs. Output Current Output Current (mA) Output Voltage (V) 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 0 50 100 150 200 250 300 VIN = 3.9V VIN = 3.6V VIN = 4.2V Supply Current vs. Supply Voltage (No Load, No Switching) Supply Voltage (V) Supply Current (µA) Startup Time with 100mA Load Time (50µs/div) EN (2V/div) VOUT (1V/div) Startup Time with 200mA Load Time (50µs/div) EN (2V/div) VOUT (1V/div) Maximum Current Pulse vs. Input Voltage (50ms pulse; VOUT > 4.5V) Input Voltage (V) Maximum Current Pulse (mA)300 400 500 600 700 800 900 1000 Efficiency vs. Input Voltage Input Voltage (V) Efficiency (%) 100mA 50mA 200mA

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-5.0V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Load Transient Response (VIN = 3.0V) Time (50µs/div) IOUT (200mA/div) VOUT (20mV/div) Load Transient Response (VIN = 4.2V) Time (50µs/div) IOUT (200mA/div) VOUT (20mV/div) Input and Output Ripples (IOUT = 50mA @ VIN = 3.5V) Time (5µs/div) VOUT AC Coupled (20mV/div) VIN AC Coupled (20mV/div) Input and Output Ripples (IOUT = 100mA @ VIN = 3.5V) Time (5µs/div) VOUT AC Coupled (20mV/div) VIN AC Coupled (20mV/div) Output Current vs. Input Voltage (500ms Pulse Time; VOUT > 4.5V) Input Voltage (V) Output Current (mA) 100 200 300 400 500 600 700 800 900 1000 Output Current vs. Input Voltage (70°C) (VOUT > 4.5V) Input Voltage (V) Output Current (mA) 100 200 300 400 500 600 700 800 100ms 50ms 200ms 300ms 500ms

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Typical Characteristics-AAT3112-5.0V VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted. Output Voltage vs. Input Voltage for Pulsed High Current (IOUT = 500mA) Input Voltage (V) Output Voltage (V) 500ms Pulse 50ms Pulse

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Functional Block Diagram Control Circuit VOUT1 VOUT2 S2 S1 S4 S3 S2S1 S4S3 Control Circuit VIN C2+ C2- C1+ C1- GND EN2 EN1 Functional Description The AAT3112 is a dual charge pump intended for high- current applications. This device boosts an input voltage to a regulated output voltage. Regulation is achieved by sensing the output voltage through an internal resistor divider network. The AAT3112 requires only four exter- nal components: two 1.0 μF ceramic capacitors for the charge pump (C1 and C2), one 10 μF ceramic capacitor for C IN, and one 10μF ceramic capacitor for COUT. The AAT3112 is designed to deliver 200mA of continuous current and up to 500mA of pulsed current. Each charge pump engine has an independent enable pin to extend battery life. The charge pump switching frequency is approximately 750kHz, enabling the use of small exter- nal flying capacitors. The AAT3112 has complete output short-circuit and ther- mal protection to safeguard the device under extreme operating conditions. An internal thermal protection cir- cuit senses die temperature and will shut down the device if the internal junction temperature exceeds approximately 145°C.

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 Applications Information Charge Pump Efficiency The AAT3112 is a regulated output voltage doubling charge pump. The efficiency ( ) can simply be defined as a linear voltage regulator with an effective output voltage that is equal to two times the input voltage. Efficiency () for an ideal voltage doubler can typically be expressed as the output power divided by the input power: η = POUT PIN In addition, with an ideal voltage doubling charge pump, the output current may be expressed as half the input current. The expression to define the ideal efficiency () can be rewritten as: η = POUT = VOUT × IOUT = VOUT PIN VIN × 2IOUT 2VIN -or- η(%) = 100 VOUT 2VIN For a charge pump with an output of 4.5V and a nominal input of 2.8V, the theoretical efficiency is 80.4%. Due to internal switching losses and IC quiescent current con- sumption, the actual efficiency can be measured at 79.6%. These figures are in close agreement across a wide range of output load conditions. Efficiency will decrease as load current drops below 0.05mA or when the level of V IN approaches VOUT. 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 gen- eral, low ESR may be defined as less than 100m . Capacitor Characteristics Ceramic composition capacitors are highly recommend- ed over all other types of capacitors for use with the AAT3112. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counter- parts. A ceramic capacitor typically has very low ESR, is lowest cost, has a smaller PCB footprint, and is non- polarized. Low ESR ceramic capacitors help to maximize charge pump transient response. Since ceramic capaci- tors 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 materi- als. NPO and C0G materials typically have tight toler- ance and are stable over temperature. Large capacitor values are typically composed of X7R, X5R, Z5U, or Y5V dielectric materials. Large ceramic capacitors, typically greater than 2.2 μF, are often available in low-cost Y5V and Z5U dielectrics, but large capacitors are not required in AAT3112 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. Layout Considerations High charge pump switching frequencies and large peak transient currents mandate careful printed circuit board layout. As a general rule for charge pump boost convert- ers, all external capacitors should be located as closely as possible to the device package with minimum length trace connections. Maximize the ground plane around the AAT3112 charge pump and make sure all external capacitors are con- nected to the immediate ground plane. A local compo- nent side ground plane is recommended.

500mA High Efficiency Charge Pump for White LED Flash Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202096A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 25, 2012 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 fo r errors or omissions in these materials or the information contained herein. Sky- works may change its documentation, products, services, specifi cations 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 confl icts, incompatibilities, or other diffi culties 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 specifi cations as a result of design defects, errors, or operation of products outside of pub- lished parameters or design specifi cations. 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 specifi cations 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 identifi cation 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 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.

Ordering Information

Package Marking 1 Part Number (Tape and Reel)2 QFN33-16 LGXYY AAT3112IVN-4.5-T1 QFN33-16 MNXYY AAT3112IVN-5.0-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 Information3 QFN33-16 3.000 ± 0.050 Pin 1 Dot By Marking 1.250 ± 0.050 0.400 ± 0.100 1.250 ± 0.0503.000 ± 0.050 0.500 ± 0.050 0.900 ± 0.100 Pin 1 Identification C0.3 0.025 ± 0.025 0.214 ± 0.036 0.230 ± 0.050 Top View Bottom View Side View All dimensions in millimeters.