TPS61235_15 Datasheet, PDF (1/36 Pages) Texas Instruments – TPS6123x 8-A Valley Current Synchronous Boost Converters with Constant Current Output Feature

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TPS61235, TPS61236
SLVSCK4 – SEPTEMBER 2015
TPS6123x 8-A Valley Current Synchronous Boost Converters with Constant Current
Output Feature
1 Features
•1 Up to 97% Efficiency Synchronous Boost
• Up to 3.5-A I_OUT for 3.3-V to 5-V Conversion
• 10-A 14-mΩ/14-mΩ Internal Power Switches
• Programmable Constant Output Current
• Output Current Monitor
• 10-µA I_Q under Light Load Condition
• Boost Status Indication
• True disconnection during shutdown
• Fixed 5.1-V Output Voltage (TPS61235) or
Adjustable Output Voltage from 2.9-V to-5.5 V
(TPS61236)
• 1-MHz Switching Frequency
• Softstart, Current Limit, Over Voltage and Over
Thermal Protections
• 2.5 mm x 2.5 mm VQFN Package
2 Applications
• Power Banks, Battery Backup Units
• USB Charging Port
• USB Type-C
• Battery Powered USB Hub
• Tablet PCs
• Battery Powered Products
3 Description
The TPS6123x is a high current, high efficiency
synchronous boost converter with constant output
current feature for single cell Li-Ion and Li-polymer
battery powered products, in a wide range of power
bank, tablet, and other portable devices. The IC
integrates 14-mΩ/14-mΩ power switches and is
capable of delivering up to a 3.5-A output current for
3.3-V to 5-V conversion with up to 97% high
efficiency. The device supports a programmable
constant output current to control power delivery, so
to save power path components and lower total
system thermal dissipation effectively.
The device only consumes a 10-µA quiescent current
under a light load condition, and can report load
status to the system, which make it very suitable for
Always-On applications. With the TPS6123x, a simple
and flexible system design can be achieved,
eliminating external power path components, saving
PCB space, and reducing BOM cost.
In shutdown, the output is completely disconnected
from the input, and current consumption is reduced to
less than 1 µA. Other features like soft start control,
reverse current blocking, over voltage protection, and
thermal shutdown protection are built-in for system
safety.
The devices are available in a 2.5-mm x 2.5-mm
VQFN package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61235
VQFN (9)
2.50 mm x 2.50 mm
TPS61236
VQFN (9)
2.50 mm x 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
SPACING
Li-Ion
Battery
TPS61235 Typical Application
L1
1 2H
SW
VOUT
5.1V
VOUT
VIN
C1
FB
10 2F
C2
22 2F x 3
ON
OFF
TPS61235
EN
CC
INACT
AGND PGND
Typical Application Efficiency (TPS61235)
100
95
90
85
80
75
70
2.7 V Input
3.3 V Input
65
3.6 V Input
4.2 V Input
60
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Output Current (A)
D001
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.