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