TPS61090RSAR Datasheet, PDF (1/25 Pages) Texas Instruments – SYNCHRONOUS BOOST CONVERTER WITH 2A SWITCH

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Actual Size
(4,15 mm x 4,15 mm)
TPS61090
TPS61091, TPS61092
SLVS484A – JUNE 2003 – REVISED APRIL 2004
SYNCHRONOUS BOOST CONVERTER
WITH 2A SWITCH
FEATURES
• Synchronous (96% Efficient) Boost Converter
With 500-mA Output Current From 1.8-V Input
• Available in a 16-Pin QFN 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
APPLICATIONS
• All Single Cell Li or Dual Cell Battery, or USB
Powered Operated Products as MP-3 Player,
PDAs, and Other Portable Equipment
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 im-
plemented 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 con-
nected internally to provide the lowest leakage induct-
ance 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 dis-
connected 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 exter-
nal resistor divider or is fixed internally on the chip.
The device is packaged in a 16-pin QFN 4 x 4 mm
(16 RSA) package.
1.8 V to 5 V C1
Input _{10 µF}
L1
6.8 µH
R1
R2
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
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2004, Texas Instruments Incorporated