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TPS62221 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS62221
Description  400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS62221 Fiches technique(HTML) 1 Page - Texas Instruments

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FEATURES
DESCRIPTION
APPLICATIONS
VI
GND
EN
SW
FB
C3
4.7
µF
L1
4.7
µH
C4
10
µF
TPS62220
VI
2.5 V to 6 V
VO
1.5 V/400 mA
R1
360 k
R2
180 k
C1
22 pF
C2
100 pF
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
VO = 1.8 V,
L = 4.7
µH,
CO = 22 µF
VI = 2.7 V
VI = 5 V
IL − Load Current − mA
VI = 3.7 V
Typical Application (Adjustable Output Voltage Version)
TPS62220, TPS62221, TPS62222
TPS62223, TPS62224
TPS62228, TPS62229
SLVS491C – SEPTEMBER 2003 – REVISED SEPTEMBER 2004
400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
High-Efficiency Synchronous Step-Down Con-
The TPS6222x devices are a family of high-efficiency,
verter With up to 95% Efficiency
synchronous step-down converters ideally suited for
portable systems powered by 1-cell Li-Ion or 3-cell
2.5-V to 6.0-V Input Voltage Range
NiMH/NiCd batteries. The devices are also suitable to
Adjustable Output Voltage Range From 0.7 V
operate from a standard 3.3-V or 5-V voltage rail.
to VI
With an output voltage range of 6.0 V down to 0.7 V
Fixed Output Voltage Options Available
and up to 400-mA output current, the devices are
Up to 400-mA Output Current
ideal to power low voltage DSPs and processors
1.25-MHz Fixed Frequency PWM Operation
used in PDAs, pocket PCs, and smart phones. Under
nominal load current, the devices operate with a fixed
Highest Efficiency Over Wide Load Current
switching frequency of typically 1.25 MHz. At light
Range Due to Power-Save Mode
load currents, the part enters the power-save mode
15-µA Typical Quiescent Current
operation; the switching frequency is reduced and the
Soft Start
quiescent current is typically only 15 µA; therefore,
the device achieves the highest efficiency over the
100% Duty Cycle Low-Dropout Operation
entire load current range. The TPS6222x needs only
Dynamic Output-Voltage Positioning
three small external components. Together with the
Available in TSOT23 Package
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
PDAs and Pocket PC
output capacitors.
Cellular Phones, Smart Phones
OMAP™ and Low Power DSP Supply
Digital Cameras
Portable Media Players
Portable Equipment
WLAN PC Cards
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.
OMAP is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2004, 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.


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