TPS62200, TPS62201
TPS62202, TPS62203, TPS62207
TPS62204, TPS62205, TPS62208
www.ti.com
SLVS417E–MARCH 2002–REVISED MAY 2006
HIGH-EFFICIENCY, SOT23
STEP-DOWN, DC-DC CONVERTER
FEATURES
DESCRIPTION
•
High Efficiency Synchronous Step-Down
The TPS6220x 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.
Converter With up to 95% Efficiency
•
•
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 300 mA Output Current
With an output voltage range of 6 V down to 0.7 V
and up to 300 mA output current, the devices are
ideal to power low voltage DSPs 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 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, it achieves the highest efficiency over the
entire load current range. The TPS6220x needs only
three small external components. Together with the
SOT23 package, a minimum system solution size is
achieved. An advanced fast response voltage mode
control scheme achieves superior line and load
regulation with small ceramic input and output
capacitors.
1-MHz Fixed Frequency PWM Operation
Highest Efficiency Over Wide Load Current
Range Due to Power Save Mode
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•
•
•
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15-µA Typical Quiescent Current
Soft Start
100% Duty Cycle Low-Dropout Operation
Dynamic Output-Voltage Positioning
Available in a 5-Pin SOT23 Package
APPLICATIONS
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•
•
•
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PDAs and Pocket PC
Cellular Phones, Smart Phones
Low Power DSP Supply
Digital Cameras
Portable Media Players
Portable Equipment
EFFICIENCY
vs
LOAD CURRENT
100
V
= 1.8 V
O
95
90 V = 2.7 V
I
L1
TPS62202
85
80
75
70
65
60
55
50
10 µH
5
V
V
O
1
2
I
V
SW
FB
I
2.5 V − 6 V
1.8 V / 300 mA
C2
10 µF
V = 3.7 V
I
C1
4.7 µF
GND
V = 5 V
I
3
4
EN
Figure 1. Typical Application
(Fixed Output Voltage Version)
45
40
0.010
0.100
1
10
100
1000
I
−Load Current − mA
L
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.
Copyright © 2002–2006, 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.