TPS61280_15 Datasheet, PDF (1/55 Pages) Texas Instruments – TPS6128x Low-, Wide- Voltage Battery Front-End DC/DC Converter Single-Cell Li-Ion, Ni-Rich, Si-Anode Applications

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TPS61280, TPS61281, TPS61282
SLVSBI1A – OCTOBER 2013 – REVISED SEPTEMBER 2014
TPS6128x Low-, Wide- Voltage Battery Front-End DC/DC Converter
Single-Cell Li-Ion, Ni-Rich, Si-Anode Applications
1 Features
•1 95% Efficiency at 2.3MHz Operation
• 2µA Quiescent Current in Low I_Q Pass-Through
Mode
• Wide V_IN Range From 2.3V to 4.8V
• I_OUT ≥ 4A (Peak) at V_OUT = 3.35V, V_IN ≥ 2.65V
• Integrated Pass-Through Mode (35mΩ)
• Programmable Valley Inductor Current Limit and
Output Voltage
• Programmable Average Input Current Limit and
Output Voltage
• True Pass-Through Mode During Shutdown
• Best-in-Class Line and Load Transient
• Low-Ripple Light-Load PFM Mode
• In-Situ Customization with On-Chip E²PROM
(Write Protect)
• Two Interface Options:
– I²C Compatible I/F up to 3.4Mbps (TPS61280)
– Simple I/O Logic Control Interface (TPS6128x)
• Thermal Shutdown and Overload Protection
• Total Solution Size <20mm², Sub 1-mm Profile
2 Applications
• Single-Cell Ni-Rich, Si-Anode, Li-Ion, LiFePO4
Smart-Phones or Tablet PCs
• 2.5G/3G/4G Mini-Module Data Cards
• Current Limited Applications Featuring High Peak
Power Loads
3 Description
The TPS6128x device provides a power supply
solution for products powered by either by a Li-Ion,
Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery.
The voltage range is optimized for single-cell portable
applications like in smart-phones or tablet PCs.
Used as a high-power pre-regulator, the TPS6128x
extends the battery run-time and overcomes input
current- and voltage limitations of the powered
system.
While in shutdown, the TPS6128x operates in a true
pass-through mode with only 2µA quiescent
consumption for longest battery shelf life.
During operation, when the battery is at a good state-
of-charge, a low-ohmic, high-efficient integrated pass-
through path connects the battery to the powered
system.
If the battery gets to a lower state of charge and its
voltage becomes lower than the desired minimum
system voltage, the device seamlessly transits into
boost mode to utilize the full battery capacity.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61280
TPS61281
DSBGA (16)
1.66 mm x 1.66 mm
TPS61282
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
Battery
2.5V .. 4.35V
L
0.47 μH
CI
1.5µF X5R 6.3V (0402)
Voltage Select
Enable
Forced Bypass / Auto
I²C Bus
TPS61280
SW
SW
VIN
VIN
VSEL
EN
BYP
SCL
SDA
PGND
PGND
PGND
VOUT
VOUT
VBAT’
CO (x2)
10µF X5R 6.3V (0603)
1.8V
GPIO
Interrupt
AGND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.