TPS61282DYFFR

The TPS6128xD/E devices provide a power solution for products powered by lithium-ion, nickel-rich, silicon-anode, or lithium iron phosphate batteries. The voltage range is optimized for single-cell portable applications such as smartphones or tablets. The TPS6128xD/E can be used as a high-power pre-regulator to extend battery runtime and overcome the input current and voltage limitations of the powered system. In shutdown, the TPS6128xD/E operates in true pass-through mode with a quiescent current of only 3μA, maximizing battery life. During operation, when the battery is in a good state of charge, a low-ohmic, highly efficient integrated pass-through path connects the battery to the powered system. If the battery enters a lower state of charge and its voltage falls below the required minimum system voltage, the device seamlessly transitions to boost mode to utilize the full battery capacity. The TPS6128xD/E devices support pulsed load currents exceeding 4A, even from deeply discharged batteries. In this operating mode, the TPS6128xD/E makes full use of the entire battery capacity: it overcomes the excessively high battery cutoff voltage of powered components with a minimum high-level input voltage; new battery chemistries can be fully discharged; and the device buffers high-current pulses that would otherwise force a system shutdown, enabling seamless transition between boost and bypass modes. This has a significant impact on battery on-time, delivering longer usage time and a better user experience for the same battery capacity, or reducing battery cost for the same usage time. The TPS6128xD/E is available in a 16-pin Chip-Scale Package (CSP), minimizing the number of external components and enabling a very compact solution size (< 20mm²) with support for small inductors and input capacitors. The TPS6128xD/E operates in synchronous boost mode at 2.3MHz and enters Power Save Mode (PFM) at light load currents to maintain high efficiency across the full load current range.

Applications

• Single-cell Ni-rich, Si-anode, Li-ion, LiFePO4 battery smartphones or tablets
• 2.5G, 3G, 4G small module data cards
• Current-limited applications with high peak power loads

Key features

• 95% efficiency at 2.3MHz
• 3μA quiescent current in low-IQ pass-through mode
• Wide VIN range: 2.3V to 4.8V
• IOUT ≥ 4A (peak) at VOUT = 3.35V and VIN ≥ 2.65V
• Integrated pass-through mode (35mΩ)
• Programmable valley inductor current limit and output voltage
• True pass-through mode during shutdown
• Excellent line and load transient response
• Low-ripple light-load PFM mode
• OTP customization with on-chip E²PROM (write protection)
• Two interface options:
• I²C-compatible IF: up to 3.4Mbps (TPS61280D/E)
• Simple I/O logic control interface
• Thermal shutdown and overload protection
• Total solution size < 20mm², profile: less than 1mm