TPS61130 Datasheet, PDF (1/28 Pages) Texas Instruments – SYNCHRONOUS SEPIC / FLYBACK CONVERTER WITH 1.1A SWITCH AND INTEGRATED LDO

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Actual Size
(5,0 mm x 6,4 mm)
Actual Size
(4,15 mm x 4,15 mm)
TPS61130
TPS61131
TPS61132
SLVS431A – JUNE 2002 – REVISED AUGUST 2003
SYNCHRONOUS SEPIC / FLYBACK CONVERTER WITH 1.1A SWITCH
AND INTEGRATED LDO
FEATURES
• Synchronous, Up To 90% Efficient, SEPIC
Converter With 300-mA Output Current From
2.5-V Input
• Integrated 200-mA Reverse Voltage Protected
LDO for DC/DC Output Voltage Post Regu-
lation or Second Output Voltage
• Dual Input or Dual Output Mode
• Available in a 16 pin QFN 4x4 or in a
TSSOP-16 Package
• 40-µA (Typical) Total Device Quiescent Cur-
rent
• 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
• High Efficient Li-Ion to 3.3-V Conversion
• Low Battery Comparator
• Power Good Output
• Low EMI-Converter (Integrated Antiringing
Switch)
• Load Disconnect During Shutdown
• Overtemperature Protection
APPLICATIONS
• All Single Cell Li, Dual or Triple Cell Battery or
USB Powered Products as MP-3 Player, PDAs,
and Other Portable Equipment
DESCRIPTION
The TPS6113x devices provide a complete power
supply solution for products powered by either a
one-cell Li-Ion or Li-Polymer or a two up to four-cell
Alkaline, NiCd or NiMH batteries. The device can gen-
erate two regulated output voltages that are either
adjusted by an external resistor divider or fixed
internally on the chip. It also provides a simple and
efficient buck-boost solution for generating 3.3 V out of
a one-cell Li-Ion or Li-Polymer battery at a maximum
output current of at least 300 mA with supply voltages
down to 1.8 V. The implemented SEPIC converter is
based on a fixed frequency, pulse-width-modulation
(PWM) controller using a synchronous rectifier to ob-
tain maximum efficiency. The maximum peak current in
the SEPIC switch is limited to a value of 1600 mA.
The converter can be disabled to minimize battery
drain. During shutdown, the load is completely discon-
nected from the battery. A low-EMI mode is im-
plemented to reduce ringing and in effect lower radi-
ated electromagnetic energy when the converter enters
the discontinuous conduction mode. A power good
output at the SEPIC stage provides additional control of
any connected circuits like cascaded power supply
stages or microprocessors.
The built-in LDO can be used for a second output
voltage derived either from the SEPIC output or directly
from the battery. The output voltage of this LDO can be
programmed by an external resistor divider or is fixed
internally on the chip. The LDO can be enabled separ-
ately i.e., using the power good of the SEPIC stage.
The device is packaged in a 16-pin QFN 4 x 4 mm
(16RSA) or in a 16-pin TSSOP (16 PW) package.
22 mH
1.8 V up to 6 V
Input
10 mF
VBAT
LBI
SWN
SWP
VOUT
TPS61130
FB
22 mH
10 mF
VOut1
e.g. 3.3 V up to 300 mA
100 mF
Control
Inputs
OFF
OFF
OFF
ON
SKIPEN
ON
EN
ON
LDOEN
PGOOD
LBO
LDOIN
LDOOUT
LDOSENSE
GND PGND
Control
Outputs
VOut2
e.g. 1.5 V up to 300 mA
2.2 mF
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 Texas Instruments
standard warranty. Production processing does not necessarily in-
clude testing of all parameters.
Copyright © 2002 – 2003, Texas Instruments Incorporated