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TPS62050 Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS62050
Description  800-mA SYNCHRONOUS STEP-DOWN CONVERTER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS62050 Fiches technique(HTML) 1 Page - Texas Instruments

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FB
PG
VIN
8
LBO
GND
SYNC
EN
LBI
PGND
TPS62052
SW
1
6
7
3
2
9
5
4
10
Ci = 10 µF
Co = 22 µF
VO = 1.5 V / 800 mA
L1 = 10
µH
VI = 3.3 V to 10 V
TYPICAL APPLICATION CIRCUIT
IO – Output Current – mA
50
30
10
0.01
0.1
1
10
60
70
TPS62050
EFFICIENCY
vs
OUTPUT CURRENT
100
100
1 k
80
20
0
40
90
VI = 7.2 V,
VO = 5 V,
SYNC = L
TPS62050, TPS62051
TPS62052, TPS62054, TPS62056
SLVS432D – SEPTEMBER 2002 – REVISED OCTOBER 2003
800-mA SYNCHRONOUS STEP-DOWN CONVERTER
FEATURES
DESCRIPTION
High-Efficiency Synchronous Step-Down
The TPS6205x devices are a family of high-efficiency
Converter With up to 95% Efficiency
synchronous step-down dc/dc converters ideally suited
12-µA Quiescent Current (Typ)
for systems powered from a 1-cell or 2-cell Li-Ion
battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline
2.7-V to 10-V Operating Input Voltage Range
battery.
Adjustable Output Voltage Range From 0.7 V
to 6 V
The TPS62050 is a synchronous PWM converter with
integrated N-channel and P-channel power MOSFET
Fixed Output Voltage Options Available in
switches. Synchronous rectification increases ef-
1.5 V, 1.8 V, and 3.3 V
ficiency and reduces external component count. To
Synchronizable to External Clock Signal up to
achieve highest efficiency over a wide load current
1.2 MHz
range,
the
converter
enters
a
power-saving
High Efficiency Over a Wide Load Current
pulse-frequency modulation (PFM) mode at light load
Range in Power-Save Mode
currents. Operating frequency is typically 850 kHz,
100% Maximum Duty Cycle for Lowest
allowing the use of small inductor and capacitor values.
Dropout
The device can be synchronized to an external clock
Low Noise Operation in Forced Fixed
signal in the range of 600 kHz to 1.2 MHz. For low noise
Frequency PWM Operation Mode
operation, the converter can be programmed into
forced-fixed frequency in PWM mode. In shutdown
Internal Softstart
mode, the current consumption is reduced to less than
Overtemperature and Overcurrent Protected
2 µA. The TPS6205x is available in the 10-pin (DGS)
Available in 10-Pin Microsmall Outline
micro-small outline package (MSOP) and operates
Package MSOP
over an free air temperature range of -40
°C to 85°C.
APPLICATIONS
Cellular Phones
Organizers, PDAs, and Handheld PCs
Low Power DSP Supply
Digital Cameras and Hard Disks
MATHCAD is a trademark of Mathsoft Incorporated.
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 – 2003, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily in-
clude testing of all parameters.


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