TPS61090_15 Datasheet, PDF (1/27 Pages) Texas Instruments – TPS6109x Synchronous Boost Converter With 2-A Switch

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TPS61090, TPS61091, TPS61092
SLVS484C – JUNE 2003 – REVISED DECEMBER 2014
TPS6109x Synchronous Boost Converter With 2-A Switch
1 Features
•1 Synchronous (96% Efficient) Boost Converter
With 500-mA Output Current From 1.8-V Input
• Available in a 16-Pin VQFN 4 x 4 Package
• Device Quiescent Current: 20 µA (Typ)
• Input Voltage Range: 1.8 V to 5.5 V
• Adjustable Output Voltage Up to 5.5 V Fixed
Output Voltage Options
• Power Save Mode for Improved Efficiency at Low
Output Power
• Low Battery Comparator
• Low EMI-Converter (Integrated Antiringing Switch)
• Load Disconnect During Shutdown
• Over-Temperature Protection
2 Applications
• All Single Cell Li or Dual Cell Battery or USB
Powered Operated Products
– MP3 Player
– PDAs
– Other Portable Equipment
3 Description
The TPS6109x devices provide a power supply
solution for products powered by either a one-cell Li-
Ion or Li-Polymer, or a two-cell alkaline, NiCd or
NiMH battery and required supply currents up to or
higher than 1 A. The converter generates a stable
output voltage that is either adjusted by an external
resistor divider or fixed internally on the chip. It
provides high efficient power conversion and is
capable of delivering output currents up to 0.5 A at 5
V at a supply voltage down to 1.8 V. The
implemented boost converter is based on a fixed
frequency, pulse-width- modulation (PWM) controller
using a synchronous rectifier to obtain maximum
efficiency. Boost switch and rectifier switch are
connected internally to provide the lowest leakage
inductance and best EMI behavior possible. The
maximum peak current in the boost switch is limited
to a value of 2500 mA.
The converter can be disabled to minimize battery
drain. During shutdown, the load is completely
disconnected from the battery. A low-EMI mode is
implemented to reduce ringing and, in effect, lower
radiated electromagnetic energy when the converter
enters the discontinuous conduction mode.
The output voltage can be programmed by an
external resistor divider or is fixed internally on the
chip.
The device is packaged in a 16-pin VQFN 4-mm x 4-
mm (16 RSA) package.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS61090
TPS61091
VQFN (10)
4.00 mm × 4.00 mm
TPS61092
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
1.8 V to 5 V C1
Input _{10 µF}
L1
6.8 µH
R1
R2
Simplified Application Schematic
SW
VBAT
EN
LBI
VOUT
FB
SYNC
LBO
GND
PGND
TPS6109x
C2
C3
R3 2.2 µF 100 µF
R4
R5
e.g. 5 V up to
500 mA
Low Battery
Output
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.