DATA SHEET AAT1217 - SKYWORKS

1 1 AAT1217600mA, , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice. March 19, 2013 General DescriptionThe AAT1217 is a high efficiency, synchronous, fixed frequency, step-up converter designed for single-cell or dual-cell alkaline, NiMH, or NiCd battery-powered appli-cations. The high switching frequency and com-pletely integrated control circuitry minimize the total solution footprint area while maintaining excellent regu-lation, ripple, and transient response throughout the full load load mode operation and low quiescent current allow the AAT1217 to maintain high efficiency perfor-mance for light load conditions.

2 With a peak induc-tor current limit, the AAT1217 is capable of delivering 100mA to the load from a single AA cell, 400mA from dual AA cells, or up to 500mA from a single-cell lithium-ion battery. The AAT1217 has a start-up voltage with operation down to AAT1217 is available in a Pb-free, space-saving low profile (1mm) 6-pin TSOT23 or 6-pin SOT23 package and is rated over the -40 C to +85 C ambient tempera-ture VIN Operation Range: to VOUT VOUT Range: to 100mA Output from a Single AA Cell Input 400mA Output from a Dual AA Cell Input 500mA Output from a Single Li+ Cell Input High Efficiency: Up to 93% Efficiency Low Start-Up Voltage: Typical Internal Synchronous Rectifier VOUT.

3 No External Schottky Diode Fixed Frequency Pulse Width Modulation (PWM) Current-Mode Control Scheme with Internal Compensation Fixed Switching Frequency Current Limit Light Load Mode Operation Over-Current Protection EMI Reduction Anti-Ringing Control Circuitry Low Shutdown Current: < A -40 C to +85 C Ambient Temperature Range Low Profile (1mm) TSOT23-6 or SOT23-6 PackageApplications Cellular and Smart Phones Digital Still and Video Cameras Microprocessors and DSP Core Supplies MP3 Player Portable Instruments Wireless and DSL ModemsTypical R2604k ,100mASWR31M ,100mASWR31M F2 AAT1217600mA, , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice.

4 March 19, 2013 Pin DescriptionsPin # Symbol Function1 SWPower Switch Pin. Ties to the drains of the PMOS synchronous rectifi er and the NMOS switch. 2 GNDG round Pin3 FBFeedback Input Pin. Connect FB to the center point of the external resistor divider. The feedback threshold voltage is Signal Input. Logic high enables the IC. Logic low disables the IC. Shutdown current is <1 Output Pin. Tied to the source of the PMOS synchronous rectifi Supply Input. Must be closely decoupled to GND, Pin 2, with a F or greater ceramic ConfigurationTSOT23-6/SOT23-6(Top View)GNDVINVOUTSHDNFBSW1234563 AAT1217600mA, , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice.

5 March 19, 2013 Absolute Maximum Ratings1 Symbol Description Value Units VINI nput Supply to 6 VVSWSW to 6 VVFB, VSHDNFB, SHDN to 6 VVOUTVOUT to 6 VTAO perating Ambient Temperature Range2-40 to 85 CTSTORAGES torage Temperature Range-65 to 150 CTLEADLead Temperature (Soldering, 10s)300 CTJO perating Junction Temperature Range2-40 to 150 CThermal Information3 Symbol Description Value Units JAMaximum Thermal ResistanceTSOT23-6190 C/WSOT23-6150 PDMaximum Power DissipationTSOT23-6526mWSOT23-66671. Absolute Maximum Ratings are those values beyond which the life of a device may be TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ = TA + PD x JA.

6 3. Mounted on an FR4 , , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice. March 19, 2013 Electrical Characteristics1 VIN = , VOUT = , TA = 25 C, unless otherwise Description Conditions Min Typ Max Units VINM inimum Start-Up VoltageIOUT = Operating VoltageVSHDN = Voltage Voltage Accuracy3 IOUT = 10mA; TA = -40 C to +85 C-4+4%VFBR eference VoltageTA = -40 C to +85 VOUT/VOUT/ VINR eference Voltage LineRegulationVIN = to , IOUT = 10mA, VOUT = = to , IOUT = 10mA,VOUT = VOUT/VOUT/ IOUTR eference Voltage Load RegulationVIN = , IOUT = 10mA to 100mA, VOUT = = , IOUT = 10mA to 400mA, VOUT = Current (Shutdown)VSHDN = AQuiescent Current (Active)Measured on VOUT, VSHDN = VIN300500 ILNMOSNMOS Switch LeakageVSW = AILPMOSPMOS Switch LeakageVSW = ARDS(ON)LNMOS Switch ON ResistanceVOUT = VOUT = (ON)HPMOS Switch ON ResistanceVOUT = VOUT = Current Limit7501200mA t(ICL)

7 Current Limit Delay to Output40nsDMAXM aximum Duty CycleVFB = , TA = -40 C to +85 C8085%FOSCS witching FrequencyTA = -40 C to +85 Input Input Input CurrentVSHDN = ATSDT hermal Shutdown160 CHysteresis201. Specifications over the temperature range are guaranteed by design, characterization, and correlation with statistical process Not including the current into internal resistance For fixed and output voltage version. The adjustable output voltage is guaranteed by reference voltage , , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice.

8 March 19, 2013 Typical CharacteristicsEfficiency vs. Output Current(VOUT = ; TA = 25 C)Output Current (mA)Efficiency (%) = = = Efficiency vs. Output Current(VOUT = 5V; TA = 25 C)Output Current (mA)Efficiency (%) = = = = Voltage vs. Output Current(VOUT = ; TA = 25 C)Output Current (mA)Output Voltage (V) = = = Output Voltage vs. Output Current(VOUT = 5V; TA = 25 C)Output Current (mA)Output Voltage (V) = = = = Start-Up Voltage vs. Output Current(VOUT = ; TA = 25 C)Output Current (mA)Start-Up Voltage (V) Maximum Output Current vs. Input Voltage(L = H; TA = 25 C) Input Voltage (V)Maximum OutputCurrent (mA) = 5 VVOUT = , , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc.

9 Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice. March 19, 2013 Typical Characteristics No Load Input Current vs. Input Voltage(VOUT = ; TA = 25 C; No Load) Input Voltage (V)Input Current ( A) Output Voltage vs. TemperatureTemperature ( C)Output Voltage (V) Load Mode Operation(VIN = ; VOUT = ; IOUT = 5mA)VSW2V/divVOUT50mV/div(AC)Time (1ms/div) 0V Anti-Ringing Operation at SW(VIN = ; VOUT = 5V; IOUT = 20mA)VSW2V/div0 VTime (400ns/div) Load Transient Response(VIN = ; VOUT = ; CFF = 100pF)IOUT50mA/divVOUT100mV/div(AC)Time (100 s/div) 0A40mA100mA 7 AAT1217600mA, , Micropower Synchronous Step-Up Converter data SHEETS kyworks Solutions, Inc.

10 Phone [781] 376-3000 Fax [781] 376-3100 202050B SKYWORKS Proprietary Information Products and Product Information are Subject to Change Without Notice. March 19, 2013 Functional DescriptionThe AAT1217 is a synchronous step-up DC-DC converter. It utilizes internal MOSFET switches to achieve high effi-ciency over the full load current range. It operates at a fixed switching frequency of , and uses the slope compensated current mode pulse width modulation (PWM) architecture. The device can operate with an input voltage below 1V; the typical start-up voltage is Synchronous RectificationThe AAT1217 integrates a synchronous rectifier to improve efficiency as well as to eliminate the need for an external Schottky diode.