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
1
FEATURES
DESCRIPTION
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
portable systems powered by 1-cell Li-Ion or 3-cell
NiMH/NiCd batteries. The devices are also suitable to
operate from a standard 3.3-V or 5-V voltage rail.
•
•
2.5-V to 6-V Input Voltage Range
Adjustable Output Voltage Range From 0.7 V
to VI
•
•
•
•
Fixed Output Voltage Options Available
Up to 400-mA Output Current
With an output voltage range of 6 V down to 0.7 V
and up to 400-mA output current, the devices are
ideal for powering the low voltage TMS320™ DSP
family and processors used in PDAs, pocket PCs,
and smart phones. Under nominal load current, the
devices operate with a fixed switching frequency of
typically 1.25 MHz. At light load currents, the part
enters the power-save mode operation; the switching
frequency is reduced and the quiescent current is
typically only 15 µA; therefore, the device achieves
the highest efficiency over the entire load current
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
control scheme achieves superior line and load
regulation with small ceramic input and output
capacitors.
1.25-MHz Fixed Frequency PWM Operation
Highest Efficiency Over Wide Load Current
Range Due to Power-Save Mode
•
•
•
•
•
15 µA Typical Quiescent Current
Soft Start
100% Duty Cycle Low-Dropout Operation
Dynamic Output-Voltage Positioning
Available in TSOT23 Package
APPLICATIONS
•
•
•
•
•
•
•
PDAs and Pocket PC
Cellular Phones, Smart Phones
OMAP™ and Low Power DSP Supply
Digital Cameras
Portable Media Players
Portable Equipment
WLAN PC Cards
100
V
= 1.8 V,
O
95
90
85
80
75
70
65
60
55
50
L = 4.7 mH,
L1
TPS62220
C
= 22 mF
O
4.7 mH
V
V
1
2
3
5
4
O
I
V
SW
I
V = 2.7 V
I
1.5 V/400 mA
2.5 V to 6 V
C4
R1
C1
GND
EN
C3
4.7 mF
10 mF
360 kW
22 pF
FB
V = 3.7 V
I
C2
R2
100 pF
180 kW
V = 5 V
I
45
40
0.01
0.1
1
10
100 1000
Typical Application (Adjustible Output Voltage Version)
I
L
− Load Current − mA
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2009, Texas Instruments Incorporated
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