Datasheet
1
FEATURES
DESCRIPTION
APPLICATIONS
V
I
GND
EN
SW
FB
C3
4.7 Fm
L1
4.7 Hm
C4
10 Fm
TPS62220
V
I
2.5Vto6V
V
O
1.5V/400mA
R1
360kW
R2
180kW
C1
22pF
C2
100pF
1
2
3
5
4
40
45
50
55
60
65
70
75
80
85
90
95
100
0.01 0.1 1 10 100 1000
V
O
=1.8V,
L =4.7 H,m
C
O
=22 Fm
Efficency − %
I
L
− LoadCurrent − mA
V
I
=3.7V
Typical Application(AdjustibleOutputVoltageVersion)
V
I
=5V
V
I
=2.7V
TPS62220 , , TPS62221 , , TPS62222
TPS62223 , TPS62224 , TPS62225
TPS62227 , TPS62228 , TPS62229
www.ti.com
....................................................................................................................................... SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009
400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
2
• High-Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
The TPS6222x devices are a family of high-efficiency,
synchronous step-down converters ideally suited for
• 2.5-V to 6-V Input Voltage Range
portable systems powered by 1-cell Li-Ion or 3-cell
• Adjustable Output Voltage Range From 0.7 V
NiMH/NiCd batteries. The devices are also suitable to
to V
I
operate from a standard 3.3-V or 5-V voltage rail.
• Fixed Output Voltage Options Available
With an output voltage range of 6 V down to 0.7 V
• Up to 400-mA Output Current
and up to 400-mA output current, the devices are
• 1.25-MHz Fixed Frequency PWM Operation
ideal for powering the low voltage TMS320™ DSP
family and processors used in PDAs, pocket PCs,
• Highest Efficiency Over Wide Load Current
and smart phones. Under nominal load current, the
Range Due to Power-Save Mode
devices operate with a fixed switching frequency of
• 15 µ A Typical Quiescent Current
typically 1.25 MHz. At light load currents, the part
• Soft Start
enters the power-save mode operation; the switching
frequency is reduced and the quiescent current is
• 100% Duty Cycle Low-Dropout Operation
typically only 15 µ A; therefore, the device achieves
• Dynamic Output-Voltage Positioning
the highest efficiency over the entire load current
• Available in TSOT23 Package
range. The TPS6222x needs only three small
external components. Together with the tiny TSOT23
package, a minimum system solution size can be
achieved. An advanced fast response voltage mode
• PDAs and Pocket PC
control scheme achieves superior line and load
• Cellular Phones, Smart Phones
regulation with small ceramic input and output
• OMAP™ and Low Power DSP Supply
capacitors.
• Digital Cameras
• Portable Media Players
• Portable Equipment
• WLAN PC Cards
1
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.
2 OMAP, TMS320 are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003 – 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.