TPS62205 Datasheet, PDF (1/19 Pages) Texas Instruments – HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER

TPS62200, TPS62201
TPS62202, TPS62203
TPS62204, TPS62205
SLVS417B – MARCH 2002 – REVISED OCTOBER 2002
HIGH-EFFICIENCY, SOT23
STEP-DOWN, DC-DC CONVERTER
FEATURES
D High Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
D 2.5 V to 6.0 V Input Voltage Range
D Adjustable Output Voltage Range From 0.7 V
to V_I
D Fixed Output Voltage Options Available
D Up to 300 mA Output Current
D 1 MHz Fixed Frequency PWM Operation
D Highest Efficiency Over Wide Load Current
Range Due to Power Save Mode
D 15-µA Typical Quiescent Current
D Soft Start
D 100% Duty Cycle Low-Dropout Operation
D Dynamic Output-Voltage Positioning
D Available in a Tiny 5-Pin SOT23 Package
APPLICATIONS
D PDAs and Pocket PC
D Cellular Phones, Smart Phones
D Low Power DSP Supply
D Digital Cameras
D Portable Media Players
D Portable Equipment
VI
2.5 V – 6 V
C1
4.7 µF
TPS62202
L1
1 _VI
5 ^{10 µH}
SW
2
GND
3
EN
4
FB
VO
1.8 V / 300 mA
C2
10 µF
Figure 1. Typical Application (Fixed Output
Voltage Version)
DESCRIPTION
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.
With an output voltage range of 6.0 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 tiny SOT23 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.
EFFICIENCY
vs
LOAD CURRENT
100
95 ^{VO = 1.8 V}
90 VI = 2.7 V
85
80
75
VI = 3.7 V
70
65
60
VI = 5 V
55
50
45
40
0.010 0.100 1
10
100
IL – Load Current – mA
1000
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.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright  2002, Texas Instruments Incorporated
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