TPS61020_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPS6102x 96% Efficient Synchronous Boost Converter

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TPS61020, TPS61024, TPS61025, TPS61026, TPS61027, TPS61028, TPS61029
SLVS451G – SEPTEMBER 2003 – REVISED DECEMBER 2014
TPS6102x 96% Efficient Synchronous Boost Converter
1 Features
•1 96% Efficient Synchronous Boost Converter
• Output Voltage Remains Regulated When Input
Voltage Exceeds Nominal Output Voltage
• Device Quiescent Current: 25 µA (Typ)
• Input Voltage Range: 0.9 V to 6.5 V
• Fixed and Adjustable Output Voltage Options Up
to 5.5 V
• Power Save Mode for Improved Efficiency at Low
Output Power
• Low Battery Comparator
• Low EMI-Converter (Integrated Anti-ringing
Switch)
• Load Disconnect During Shutdown
• Overtemperature Protection
• Small 3-mm × 3-mm VSON-10 Package
2 Applications
• All One-Cell, Two-Cell, and Three-Cell Alkaline,
NiCd or NiMH, or One-Cell Li-Ion or Li-Polymer
Battery-Powered Products
• Portable Audio Players
• PDAs
• Cellular Phones
• Personal Medical Products
• Camera White LED Flash Lights
3 Description
The TPS6102x family of devices provide a power
supply solution for products powered by either a one-
cell, two-cell, or three-cell alkaline, NiCd or NiMH, or
one-cell Li-Ion or Li-polymer battery. Output currents
can go as high as 200 mA while using a single-cell
alkaline battery, and discharge it down to 0.9 V. The
device can also be used for generating 5 V at 500
mA from a 3.3-V rail or a Li-Ion battery. The boost
converter is based on a fixed-frequency, pulse width
modulation (PWM) controller using a synchronous
rectifier to obtain maximum efficiency. At low load
currents the converter enters the power save mode to
maintain a high efficiency over a wide-load current
range. The Power Save mode can be disabled,
forcing the converter to operate at a fixed switching
frequency. The maximum peak current in the boost
switch is limited to a value of 800 mA, 1500 mA, or
1800 mA depending on the version of the device.
The TPS6102x devices keep the output voltage
regulated even when the input voltage exceeds the
nominal output voltage. The output voltage can be
programmed by an external resistor divider, or is
fixed internally on the chip. The converter can be
disabled to minimize battery drain. During shutdown,
the load is completely disconnected 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 device is packaged in a 10-pin
VSON PowerPAD™ package measuring 3 mm x 3
mm (DRC).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS6102x
VSON (10)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Schematic
L1
6.8 µH
0.9-V To
C1
R1
6.5-V Input 10 µF
R2
SW
VBAT
EN
LBI
VOUT
FB
PS
LBO
GND
PGND
TPS61020
C2
C3
R3 2.2 µF 47 µF
R4
R5
V_O
3.3 V Up To
200 mA
Low Battery
Output
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.