AAT1219IWP-1-1.2-T1

DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit General Description Features The AAT1219 is a high current synchronous boost converter with programmable low side MOSFET peak current limit of 500mA to 2.5A. It is ideal for preventing input current from overloading system power in PCI-E card applications based on WCDMA/Edge/GPRS/TD-SCDMA PCI-E card GSM high load pulse applications. With a suitable UltraCap or SuperCap, the AAT1219 ensures that output voltage meets load power requirements when large load pulses are applied. It is also ideal for CDMA/ Evdo-A/Evdo-B and other industry modem continuous load current applications. • VIN Range: 2.4V to VOUT + 0.25V • VOUT Range ▪ Adjustable and Fixed Voltage Versions ▪ Adjustable: 3.0V to 5.0V • Programmable NMOS Peak Current Limit: 500mA to 2.5A • Startup Inrush Current Limit: 500mA • Reverse Current Blocking • True Load Disconnect when Shutdown • Up to 95% Efficiency • 1.2MHz Switching Frequency • Low RDS(ON) • Synchronous Boost Rectification and Internal Compensation • Output Ready Indicator • Fault Protection ▪ Programmable Over-Voltage Protection ▪ Short-Circuit Protection ▪ Over-Temperature Protection • Low-profile TDFN33-12 Package The output voltage of the adjustable version of the AAT1219 is programmed from 3.0V to 5.0V by an external resistive divider; the FB pin is left floating in the fixed output voltage version. Optimized internal compensation provides fast transient response with no external components. Light load switching frequency modulation and low quiescent current maintain high efficiency performance for light load mode conditions. The low-side power MOSFET peak current limit of 500mA to 2.5A is set via an external resistor to protect the system power from overload. The high-side current limit operates in a linear mode to limit inrush current to 500mA. Reverse blocking is integrated to prevent current from flowing back to the input. The AAT1219's true load disconnect function isolates the output from the input when the device is disabled. Output over-voltage, short-circuit, and over-temperature protection are also integrated to protect the AAT1219 from these fault conditions. Applications • PC Cards (PCMCIA) Modems • PCI-E Modem Cards ▪ WCDMA/Edge/GPRS/TD-SCDMA ▪ CDMA/Evdo-A/Evdo-B ▪ Industry Modems • USB Modems The AAT1219 is available in a Pb-free, 12-pin, low-profile TDFN33 package and is rated over the -40°C to 85°C temperature range. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 1 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Typical Application 2.4V to VOUT +0.25V L1 4.7μH LX VIN CIN 10μF VOUT 3.8V High Load Pulse OUT R1 316kΩ AAT1219 R3 100kΩ FB R2 59kΩ RDY COUT1 22μF COUT2 UltraCap or SuperCap EN ISET OVP PGND AGND RSET 2.4V to VOUT +0.25V L1 4.7μH LX CIN 10μF VIN R1 287kΩ AAT1219 R3 100kΩ VOUT 3.5V Continuous Load OUT COUT1 22μF FB R2 59kΩ RDY EN ISET AGND OVP PGND RSET 40.2kΩ Pin Descriptions 2 Pin # Symbol 4 IN 1,2 LX 8 FB 10 OUT 11, 12 7 3 6 PGND AGND EN RDY 9 ISET 5 OVP Description Battery input voltage. Supplies the IC at startup. Switching node tied to drain of internal N-channel MOSFET and source of internal P-channel MOSFET. Connect this pin to the external power inductor. Feedback input pin.This pin is connected to an external resistor divider which programs the output voltage for adjustable version with feedback voltage of 0.6V. Boost converter output voltage; connects to the P-channel synchronous MOSFET source. Bypass with ceramic capacitor to GND. Power ground. Non-power signal ground pin. Input enable pin. Logic high to enable the boost. Logic low to disable the IC. System ready pin. Open drain, active low, initiated when the output capacitor is 95% charged. Peak current limit programmable input. An external resistor from ISET to ground is adopted to program the low-side MOSFET peak current limit between 500mA and 2.5A. Over voltage protection pin.This pin is connected to an external resistor divider to set the over voltage threshold.To disable the over voltage feature, short this pin to ground. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Pin Configuration TDFN33-12 (Top View) LX LX EN IN OVP RDY 1 12 2 11 3 10 4 9 5 8 6 7 PGND PGND OUT ISET FB AGND Absolute Maximum Ratings1 Symbol Description LX, VIN, EN, RDY, FB Voltage to PGND PGND Voltage to GND Operating Junction Temperature Range Storage Temperature Range Maximum Soldering Temperature (at leads, 10 sec) TJ TS TLEAD Value Units -0.3 to 6.0 -0.3 to 0.3 -40 to 150 -65 to150 300 V V C C C Value Units 2 50 W C/W Thermal Information Symbol PD JA Description Maximum Power Dissipation2 Maximum Thermal Resistance3 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 1.6mm thick FR4 circuit board. 3. Derate 25mW/C above 25 C ambient temperature. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 3 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Electrical Characteristics VIN = 3.3V, CIN = 10μF, COUT = 22μF, L = 4.7μH, TA = 25°C unless otherwise noted. Symbol VIN VOUT_RANGE VOP Input Operating Voltage Range 2.4 IQ ISHDN Quiescent Supply Current Shutdown Current VOVP ILIMIT,P ILIMIT,N FOSC DTYMAX Logic VEN(L) VEN(H) IEN VRDY Thermal TSD TSD(HYS) Min 3.0 UVLO Threshold ∆VOUT/ ∆IOUT ∆VOUT/ ∆VOUT RDS(ON)_N RDS(ON)_P Conditions Minimum Start-Up Voltage Output Voltage Range VUVLO VFB_ACC 4 Description Feedback Voltage Accuracy VIN Rising Hysteresis No Load, No Switching EN = 0V, VIN = 5.5V TA = 25°C, VFB = 600mV TA = -40°C to +85°C, VFB = 600mV Load Regulation 0A to 1.2A, VOUT = 3.8V Line Regulation NMOS Switch On Resistance PMOS Switch On Resistance Over-Voltage Protection Threshold PMOS Current Limit NMOS Current Limit Switching Frequency Maximum Duty Cycle Logic Input Low Threshold for EN Logic Input High Threshold for EN Enable Input Low Current RDY Threshold Over-Temperature Shutdown Threshold Over-Temperature Shutdown Hysteresis Typ Max Units 2.3 2.4 5.0 VOUT + 0.25 2.3 V V 2.1 100 58 0.01 -2 -3 80 1 2 3 V V mV μA μA % % 0.5 % VIN = 2.4V to VOUT 0.2 %/V VOUT = 3.8V VOUT = 3.8V VOVP Rising, TA = 25°C VOVP Hysteresis VOUT = 0V RSET = 100kΩ 250 300 600 20 500 1.0 1.2 90 mΩ mΩ mV mV mA A MHz % 570 0.8 630 1.2 0.4 VIN = VOUT = 5.5V VOUT Rising VOUT Hysteresis 1.4 -1.0 1.0 95 10 140 15 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 V V μA % VOUT % VOUT C C o o DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Typical Characteristics L = 4.7μH, COUT = 22μF. Input Current vs. Input Voltage Input Current vs. Input Voltage (VOUT = 3.8V) (VOUT = 5V) 150 110 145 108 140 Input Current (μA) Input Current (μA) 112 106 104 102 100 98 96 94 135 130 125 120 115 110 92 105 90 100 2.4 2.6 2.8 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 3.0 3.2 3.4 3.6 3.8 Quiescent Current vs. Temperature Efficiency vs. Output Current (Measured from VOUT) (VOUT = 3.3V) 100 100 90 90 80 60 50 40 30 VOUT = 5.5V VOUT = 4.2V VOUT = 3.3V VOUT = 2.4V 20 10 -20 0 20 40 60 80 70 60 50 40 30 VIN = 2.4V VIN = 2.7V VIN = 3.0V 20 10 0 0.01 100 0.1 1 Efficiency vs. Output Current 100 1000 10000 Efficiency vs. Output Current (VOUT = 3.8V) (VOUT = 5.0V) 100 100 90 90 80 Efficiency (%) 80 Efficiency (%) 10 Output Current (mA) Temperature (°C) 70 60 50 VIN = 2.4V VIN = 2.6V VIN = 2.8V VIN = 3.0V VIN = 3.3V 40 30 20 10 0 0.01 4.8 5.0 80 70 0 -40 4.6 Input Voltage (V) Efficiency (%) Quiescent Current (μA) Input Voltage (V) 4.0 4.2 4.4 0.1 1 10 100 Output Current (mA) 1000 70 60 VIN = 2.4V VIN = 2.8V VIN = 3.0V VIN = 3.3V VIN = 3.6V VIN = 4.0V VIN = 4.2V 50 40 30 20 10 10000 0 0.01 0.1 1 10 100 1000 10000 Output Current (mA) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 5 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Typical Characteristics L = 4.7μH, COUT = 22μF. Load Regulation vs. Output Current Load Regulation vs. Output Current (VOUT = 3.8V) (VOUT = 5.0V) 1.0 VIN = 2.4V VIN = 2.6V VIN = 2.8V VIN = 3.0V VIN = 3.3V 0.8 0.6 0.4 0.2 Load Regulation (%) Load Regulation (%) 1.0 0.0 -0.2 -0.4 -0.6 -0.8 VIN = 2.4V VIN = 2.8V VIN = 3.0V VIN = 3.3V VIN = 3.6V VIN = 4.0V VIN = 4.2V 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 0.01 0.1 1 10 100 1000 -1.0 0.01 10000 0.1 1 Output Current (mA) Feedback Voltage Error(%) Feedback Voltage (V) 601.5 601.0 600.5 600.0 599.5 599.0 598.5 3.5 4.0 4.5 5.0 5.5 0.20 0.00 -0.20 -0.40 -40 -20 0 40 60 VEN(H) vs. Temperature VEN(L) vs. Temperature (VIN = 3.6V; VOUT = 5V) (VIN = 3.6V; VOUT = 5V) 1.05 1.05 1 1 0.95 0.95 VEN(L) (V) VEN(H) (V) 20 80 100 Temperature (°C) 0.9 0.85 0.8 0.9 0.85 0.8 -15 10 35 Temperature (°C) 6 10000 0.40 Input Voltage (V) 0.75 -40 1000 Feedback Voltage Error vs. Temperature 602.0 3.0 100 Output Current (mA) Feedback Voltage vs. Input Voltage 598.0 2.5 10 60 85 0.75 -40 -15 10 35 60 Temperature (°C) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 85 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Typical Characteristics L = 4.7μH, COUT = 22μF. RDS(ON)_P vs. Input Voltage RDS(ON)_N vs. Input Voltage 330 390 85°C 25°C -40°C 85°C 25°C -40°C 300 RDS(ON)_N (mΩ) RDS(ON)_P (mΩ) 360 330 300 270 240 270 240 210 180 150 210 180 2.7 3.1 3.5 3.9 4.3 4.7 5.1 120 2.7 5.5 3.1 3.5 Input Voltage (V) 3.9 4.3 4.7 5.1 5.5 Input Voltage (V) Enable Threshold vs. Input Voltage Switching Frequency vs. Temperature Enable Threshold (V) 1.15 1.05 0.95 0.85 0.75 0.65 2.5 VEN(H) VEN(L) 3.0 3.5 4.0 4.5 5.0 5.5 Switching Frequency (MHz) (VIN = 3.6V; VOUT = 5V) 1.30 1.26 1.22 1.18 1.14 1.10 -40 -15 10 35 60 Line Transient Load Transient (VIN = 2.4V to 3.3V; VOUT = 3.8V; IOUT = 200mA; CFF = 0pF) (VIN = 3.3V; VOUT = 3.8V; CFF = 47pF) VIN (0.5V/div) VOUT (200mV/div) 2.4 85 Temperature (°C) Input Voltage (V) 3.8 500mA VOUT (100mV/div) ILOAD (0.25A/div) 3.8 50mA 0A Time (40μs/div) Time (100μs/div) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 7 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Typical Characteristics L = 4.7μH, COUT = 22μF. VIN (4V/div) 0 VOUT (5V/div) 0 IIN (0.2A/div) 0 Soft Start Output Ripple (VIN = 3.6V; VOUT = 5V; IOUT = 100mA) (VIN = 3.3V; VOUT = 3.8V; IOUT = 1mA) ILX (0.1A/div) 0A VOUT (20mV/div) 3.8V Time (200μs/div) Time (100μs/div) Output Ripple Maximum Output Current vs. Input Voltage ILX (0.1A/div) 0.55A VOUT (20mV/div) 3.8V Time (0.8μs/div) 8 (VOUT = 3.8V; CFF = 0F) Maximum Output Current (mA) (VIN = 3.3V; VOUT = 3.8V; IOUT = 500mA) 2000 1800 1600 1400 1200 1000 800 2.4 2.6 2.8 3.0 3.2 3.4 Input Voltage (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202052A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 12, 2012 3.6 3.8 DATA SHEET AAT1219 High Current Step-Up Converter with Adjustable Current Limit Functional Block Diagram OUT IN UVLO Over-Temperature Protection Internal Power Select Control Logic DH Reverse Current Block True Load Disconnect Start-up PMOS Current Control Mode Control OVP EN NMOS Current Control ISET PMOS Comp OVP LX 0.575V RDY 0.6V NMOS DL Slope Compensation PGND Functional Description The AAT1219 synchronous step-up converter is targeted for PC card GSM/GPRS/3G and WiMax modem card applications. It includes two current limits to ensure fast, controlled startup and continuous operation with the PCMCIA specifications. The high 1.2MHz switching frequency of the AAT1219 facilitates output filter component size reduction for improved power density and reduced overall footprint. It also provides greater bandwidth and improved transient Error Amp. FB AGND response over other lower frequency step-up converters. The compensation and feedback is integrated with only three external components (CIN, COUT, L). Low RDS(ON) synchronous power switches provide high efficiency for heavy load conditions. Switching frequency modulation and low quiescent current maintains this high efficiency for light load mode condition. In addition to the improved efficiency, the synchronous rectifier has the added performance advantage of true load disconnect during shutdown (