TPS61010_13 Datasheet, PDF (1/31 Pages) Texas Instruments – HIGH-EFFICIENCY, 1-CELL AND 2-CELL BOOST CONVERTERS

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DGS
DRC
TPS61010, TPS61011
TPS61012, TPS61013
TPS61014, TPS61015, TPS61016
SLVS314D – SEPTEMBER 2000 – REVISED JUNE 2005
HIGH-EFFICIENCY, 1-CELL AND 2-CELL BOOST CONVERTERS
FEATURES
• Integrated Synchronous Rectifier for Highest
Power Conversion Efficiency (>95%)
• Start-Up Into Full Load With Supply Voltages
as Low as 0.9 V, Operating Down to 0.8 V
• 200-mA Output Current From 0.9-V Supply
• Powersave-Mode for Improved Efficiency at
Low Output Currents
• Autodischarge Allows to Discharge Output
Capacitor During Shutdown
• Device Quiescent Current Less Than 50 µA
• Ease-of-Use Through Isolation of Load From
Battery During Shutdown of Converter
• Integrated Antiringing Switch Across Inductor
• Integrated Low Battery Comparator
• Micro-Small 10-Pin MSOP or 3 mm x 3 mm
QFN Package
• EVM Available (TPS6101xEVM-157)
APPLICATIONS
• All Single- or Dual-Cell Battery Operated Prod-
ucts Like Internet Audio Players, Pager, Port-
able Medical Diagnostic Equipment, Remote
Control, Wireless Headsets
DESCRIPTION
The TPS6101x devices are boost converters intended
for systems that are typically operated from a single-
or dual-cell nickel-cadmium (NiCd), nickel-metal hy-
dride (NiMH), or alkaline battery.
The converter output voltage can be adjusted from
1.5 V to a maximum of 3.3 V, by an external resistor
divider or, is fixed internally on the chip. The devices
provide an output current of 200 mA with a supply
voltage of only 0.9 V. The converter starts up into a
full load with a supply voltage of only 0.9 V and stays
in operation with supply voltages down to 0.8 V.
The converter is based on a fixed frequency, current
mode, pulse-width-modulation (PWM) controller that
goes automatically into power save mode at light
load. It uses a built-in synchronous rectifier, so, no
external Schottky diode is required and the system
efficiency is improved. The current through the switch
is limited to a maximum value of 1300 mA. The
converter can be disabled to minimize battery drain.
During shutdown, the load is completely isolated from
the battery.
An autodischarge function allows discharging the
output capacitor during shutdown mode. This is
especially useful when a microcontroller or memory is
supplied, where residual voltage across the output
capacitor can cause malfunction of the applications.
When programming the ADEN-pin, the autodischarge
function can be disabled. A low-EMI mode is im-
plemented to reduce interference and radiated elec-
tromagnetic energy when the converter enters the
discontinuous conduction mode. The device is pack-
aged in the micro-small space saving 10-pin MSOP
package. The TPS61010 is also available in a 3 mm
x 3 mm 10-pin QFN package.
L1
C_IN
10 mH
10 mF
6 _VBAT
7
SW
VOUT ⁵
R1
9 _LBI
R3
LBO ¹⁰
R2
TPS61016
VOUT = 3.3 V
C_OUT
22 mF
Low Battery
Warning
OFF
OFF
ON 1
EN
FB ³
ON 8
ADEN
COMP ²
GND
4
R_C
100 kW
C_C1
10 pF
C_C2
10 nF
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 © 2000–2005, Texas Instruments Incorporated