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Advanced Low Power Solutions Buck-Boost in HotRod™ Package TPS630250 TI Information – Selective Disclosure 1 TPS630250 Industry smallest 2AOUT single-inductor Buck-Boost Features Benefits • 2.3V to 5.5VIN, 2A output current supported over entire VIN range • Supports new chemistry Li-Ion batteries which enable lower cutoff voltages • Automatic Power-Save Mode with 35µA IQ • Efficiency higher than 90% (97% peak) over the complete load range extends battery life • VOUT ripple <50mV in PFM mode • High VOUT accuracy over the complete load range • Protects the device against reverse current as well as eliminates parasitic drain from battery when • TPS630250 (adj VOUT), ‘251(2.9VOUT), ‘252(3.3VOUT) converter is disabled • Load Disconnect • 20 pin WCSP 1.7x 2.1mm • Total solution size <44 mm2 • 14 pin HotRod™ QFN 2.5x3mm • NEW Applications • • • • Smart Grid back-up power ePOS Point of Sales Smartphones, Ultrabooks and accessories Single Li-Ion cell powered applications TPS630250 Easy-to-Use HotRod™ QFN QFN WCSP HotRod™ Flexible Assembly easy Hi Resistance Good thermals Low power Handling bare die Low Resistance Bad thermals Best Performance Like a QFN Low Resistance Good thermals Die Leadframe Board Board Board Improved Thermal Performance low Temp Rise at Full Power Bottom View VIN=3.6V, VOUT=3.3V, IOUT=3A TI Information – Selective Disclosure TPS630250 in HotRod™ - solution size HotRod™ 2.5mm 1.6mm WCSP 2mm 3mm Solution size: 49 mm2 (HotRod) Layout Example using HotRod™ Solution size: 44 mm2 (WCSP) Layout Example using WCSP Buck-Boost in QFN: competitive landscape NEW NEW TPS63050 ISL9110 TPS63025 RT6154 Current Limit IOUT max Rds_on 1A 0.5A 140mΩ 2A 1A 120mΩ 4A 2A <50mΩ 5A 3A 50mΩ (typ) External components L=1.5µH CIN=10µF COUT=10µF L=2.2µH CIN=10µF COUT=10µF L=1µH CIN=10µF COUT=2x 22µF L=2.2µH CIN=20µF COUT=100µF IC size QFN 2.5 x 2.5 mm HotRod™ QFN 3 x 3 mm QFN 2.5 x 3 mm HotRod™ QFN 3 x 4 mm Solution size 19 mm2 93 mm2 49 mm2 120 mm2 VRIPPLE <50mV ~50mV <30mV ~80mV VOUT Accuracy 1.1% (PWM mode) 2% (PWM mode) 1% (PWM mode) 1% (PWM mode) Efficiency Up to 96% Up to 95% 95% (peak 97%) Up to 96% Switching frequency 2.5 MHz 2.5 MHz 2.5 MHz 2.4 MHz TI Information – Selective Disclosure TPS630250 buck-boost key advantages • Integrated Soft Start allows a smooth start-up time • Output voltage ripple is 50mV max under worst conditions • Automatic buck-boost transition and PFM to PWM transition. • Smallest package solution size: – WCSP package: • Very small external components allow <44mm2 total footprint. • Competition has larger IC and passives to build same solution. – HotRod package: NEW • Easy-to-use QFN-similar package • Improved thermal performance • Lower manufacturing costs TI Information – Selective Disclosure Buck-Boost Converter – TPS63… Switch Current Limit Buck-Boost Preview VOUT 4.5A TPS63025 4.0A TPS63020 TPS63024 Boost in SEPIC Conf. NEW package 2.3 to 3.6V WCSP 1.8x2.1mm HotRod™QFN 2.5x3mm 1.2 to 5.5V QFN 3x4mm 2.5 to 3.6V WCSP 1.8x2.1mm Vin to 38V TSSOP 5x6mm 2.5 to 8V QFN 3x3mm 1.2 to 5.5V WCSP 1.9x2.1mm 1.2 to 5.5V QFN 3x3mm Vin to 38V SON 2x2mm 2.5 to 5.5V QFN 4x4mm TSSOP 5x6mm 2.5 to 5.5V WSCP 1.2x1.6mm HotRod™QFN 2.5x2.5mm 1.2 to 5.5V WSCP 1.1x1.9mm SON 2.5x2.5mm -15 to -2V SON 3x3mm 3.0A TPS61175 2.25A TPS63060 TPS63010 2.2A 1.8A TPS63000 1.2A TPS61170 1.1A TPS61130 TPS63050 1.0A TPS63030 1.0A TPS63700 Inverter 1.8 2.0 2.3 2.5 2.9 3.0 3.3 TI Information – Selective Disclosure 5.5 6.0 12.0 16V18V Input Voltage Where to use Buck-Boost BATTERY POWER CONVERSION SYSTEM LOADS Audio WiFi Module Screen Sensors 4.3 V PMIC 2.7 V 1s xp: 1 cell in series, multiple cells in parallel, typical architecture for mobile devices LCD Display eMMC card SD card LPDDR Possible System Solutions 2A 0.7A TPS630250 Buck-Boost • Power the LDO section in the PMIC • • Highest efficiency happens when buckboost Vout is approx. 3.1V. 2A continuous output current. TPS61280A Boost-bypass • Power single-input PMIC (both buck and LDO sections) and RFPA. • Highest efficiency happens when boost-bypass Vout is approx. 3.4V. • Up to 4A output current. TI Information – Selective Disclosure Classical Buck-Boost Converter versus TPS630xx Buck-Boost Competition 𝐼𝐿𝑜𝑎𝑑 = 𝐼𝑙,𝑎𝑣𝑔 ∙ 𝑡𝐴𝐵 + 𝑡𝐴𝐷 + 𝑡𝐶𝐷 ⋮ 𝑡𝐴𝐵 ≪ 𝑡𝐴𝐷 + 𝑡𝐶𝐷 → 𝐼𝐿𝑜𝑎𝑑 ≅ 𝐼𝑙,𝑎𝑣𝑔 𝑡𝐴𝐷 + 𝑡𝐶𝐷 TPS630XX Buck-Boost Mode Ch1:L1,Ch2=L2, Ch3=IL;Ch4=Vout+AC coupled TPS630xx family efficiency stays flat over VIN TPS630xx family Competition Buck-Boost operation Efficiency dip TPS63025 performance Efficiency 50mV Output voltage ripple