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TPS71202 Datasheet(PDF) 1 Page - Texas Instruments

No. de Pieza. TPS71202
Descripción  SYNCHRONOUS SEPIC / FLYBACK CONVERTER WITH 1.1A SWITCH AND INTEGRATED LDO
Descarga  28 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS71202 Datasheet(HTML) 1 Page - Texas Instruments

 
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Actual Size
(5,0 mm x 6,4 mm)
Actual Size
(4,15 mm x 4,15 mm)
www.ti.com
OFF
ON
OFF
ON
OFF
ON
VBAT
LBI
SKIPEN
EN
LDOEN
SWN
VOUT
FB
PGOOD
LBO
LDOIN
LDOOUT
LDOSENSE
GND
PGND
Control
Inputs
Control
Outputs
VOut1
VOut2
TPS61130
SWP
22 mH
22 mH
100 mF
e.g. 3.3 V up to 300 mA
2.2 mF
e.g. 1.5 V up to 300 mA
10 mF
1.8 V up to 6 V
Input
10 mF
TPS61130
TPS61131
TPS61132
SLVS431A – JUNE 2002 – REVISED AUGUST 2003
SYNCHRONOUS SEPIC / FLYBACK CONVERTER WITH 1.1A SWITCH
AND INTEGRATED LDO
FEATURES
DESCRIPTION
Synchronous, Up To 90% Efficient, SEPIC
The TPS6113x devices provide a complete power
Converter With 300-mA Output Current From
supply solution for products powered by either a
one-cell Li-Ion or Li-Polymer or a two up to four-cell
2.5-V Input
Alkaline, NiCd or NiMH batteries. The device can gen-
Integrated 200-mA Reverse Voltage Protected
erate two regulated output voltages that are either
LDO for DC/DC Output Voltage Post Regu-
adjusted by an external resistor divider or fixed
lation or Second Output Voltage
internally on the chip. It also provides a simple and
Dual Input or Dual Output Mode
efficient buck-boost solution for generating 3.3 V out of
a one-cell Li-Ion or Li-Polymer battery at a maximum
Available in a 16 pin QFN 4x4 or in a
output current of at least 300 mA with supply voltages
TSSOP-16 Package
down to 1.8 V. The implemented SEPIC converter is
40-µA (Typical) Total Device Quiescent Cur-
based on a fixed frequency, pulse-width-modulation
rent
(PWM) controller using a synchronous rectifier to ob-
tain maximum efficiency. The maximum peak current in
Input Voltage Range: 1.8-V to 5.5-V
the SEPIC switch is limited to a value of 1600 mA.
Adjustable Output Voltage up to 5.5-V, Fixed
The converter can be disabled to minimize battery
Output Voltage Options
drain. During shutdown, the load is completely discon-
Power Save Mode for Improved Efficiency at
nected from the battery. A low-EMI mode is im-
Low Output Power
plemented to reduce ringing and in effect lower radi-
High Efficient Li-Ion to 3.3-V Conversion
ated electromagnetic energy when the converter enters
the discontinuous conduction mode. A power good
Low Battery Comparator
output at the SEPIC stage provides additional control of
Power Good Output
any connected circuits like cascaded power supply
stages or microprocessors.
Low EMI-Converter (Integrated Antiringing
Switch)
The built-in LDO can be used for a second output
Load Disconnect During Shutdown
voltage derived either from the SEPIC output or directly
from the battery. The output voltage of this LDO can be
Overtemperature Protection
programmed by an external resistor divider or is fixed
internally on the chip. The LDO can be enabled separ-
APPLICATIONS
ately i.e., using the power good of the SEPIC stage.
All Single Cell Li, Dual or Triple Cell Battery or
The device is packaged in a 16-pin QFN 4 x 4 mm
USB Powered Products as MP-3 Player, PDAs,
(16RSA) or in a 16-pin TSSOP (16 PW) package.
and Other Portable Equipment
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.
Copyright © 2002 – 2003, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily in-
clude testing of all parameters.


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