TPS61260_16 Datasheet, PDF (1/26 Pages) Texas Instruments – TPS6126x 0.8-V Input Synchronous Boost Converters with 100-mA Output Current

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TPS61260, TPS61261
SLVSA99B – MAY 2011 – REVISED NOVEMBER 2014
TPS6126x 0.8-V Input Synchronous Boost Converters with 100-mA Output Current
1 Features
•1 Input Voltage Range from 0.8 V to 4.0 V
• Up to 95% Efficiency
• 100 mA Output Current at 3.3 V_out (VIN > 1 V)
• Fixed and Adjustable Output Voltage Options from
1.8 V to 4.0 V
• Programmable Average Output Current from 10
mA to 100 mA
• Adjustable Output Current Limit for Smallest
Inductor
• Power Save Mode for Improved Efficiency at Low
Output Power
• 29-µA Quiescent Current
• Advanced Softstart
• Quasi Fixed Frequency Operation at 2.5 MHz
• Output Overvoltage Protection
• Load Disconnect During Shutdown
• Undervoltage Lockout
• Available in a 2.00 × 2.00 mm, 6-Pin WSON
Package
2 Applications
• All Single or Dual Cell Alkaline, NiCd or NiMH
Battery Powered Products
• High Output Impedance Battery (Coin Cells)
Powered Products
• Personal Medical Products
• LED Driver
• Laser Pointer
• Wireless Headsets
• Industrial Metering Equipment
3 Description
The TPS6126x devices provide a power supply
solution for products powered by either single or dual
cell alkaline, NiCd, or NiMH batteries. Its unique
advanced softstart makes it also suitable for products
powered by high output impedance battery types, like
coin cells. Output currents can go as high as 100 mA
while using a single cell alkaline battery, and
discharge it down to 0.8 V or lower.
The boost converter is based on a quasi fixed
frequency, pulse-width-modulation (PWM) controller
using synchronous rectification to obtain maximum
efficiency. At low load currents, the converter enters
Power Save Mode to ensure high efficiency over a
wide load current range. The maximum average
current in the switches is limited to a programmable
value which can go as high as 700 mA. The output
voltage is programmable using an external resistor
divider, or is fixed internally on the chip. In addition,
the average output current can be programmed as
well. The converter then regulates the programmed
output voltage or the programmed output current,
which ever demands lower output power. The
converter can be disabled to minimize battery drain.
During shutdown, the load is disconnected from the
battery. The device is packaged in a 6-pin WSON
(DRV) package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61260
TPS61261
WSON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
L1
L
4.7 µH
VOUT
R1
V_IN
0.8 V to 4.0 V
C1
10 µF
VIN
FB
R2
EN
V_OUT
C2
10 µ F
GND
RI
R3
TPS61260
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.