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TPS62050DGS Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS62050DGS
Description  800-mA SYNCHRONOUS STEP-DOWN CONVERTER
Download  25 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62050DGS Fiches technique(HTML) 1 Page - Texas Instruments

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background image
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
TPS62052, TPS62054
TPS62056, TPS62050, TPS62051
www.ti.com
SLVS432E – SEPTEMBER 2002 – REVISED JUNE 2011
800-mA SYNCHRONOUS STEP-DOWN CONVERTER
Check for Samples: TPS62052, TPS62054, TPS62056, TPS62050, TPS62051
1
FEATURES
DESCRIPTION
The TPS6205x devices are a family of high-efficiency
2
High-Efficiency Synchronous Step-Down
synchronous
step-down
dc/dc
converters
ideally
Converter With up to 95% Efficiency
suited for systems powered from a 1-cell or 2-cell Li-
12-µA Quiescent Current (Typ)
Ion battery or from a 3-cell to 5-cell NiCd, NiMH, or
2.7-V to 10-V Operating Input Voltage Range
alkaline battery.
Adjustable Output Voltage Range From 0.7 V
The TPS62050 is a synchronous PWM converter with
to 6 V
integrated N-channel and P-channel power MOSFET
switches.
Synchronous
rectification
increases
Fixed Output Voltage Options Available in
efficiency and reduces external component count. To
1.5 V, 1.8 V, and 3.3 V
achieve highest efficiency over a wide load current
Synchronizable to External Clock Signal up to
range, the converter enters a power-saving pulse-
1.2 MHz
frequency modulation (PFM) mode at light load
High Efficiency Over a Wide Load Current
currents. Operating frequency is typically 850 kHz,
allowing the use of small inductor and capacitor
Range in Power-Save Mode
values. The device can be synchronized to an
100% Maximum Duty Cycle for Lowest
external clock signal in the range of 600 kHz to 1.2
Dropout
MHz. For low noise operation, the converter can be
Low Noise Operation in Forced Fixed
programmed into forced-fixed frequency in PWM
Frequency PWM Operation Mode
mode. In shutdown mode, the current consumption is
reduced to less than 2 µA. The TPS6205x is
Internal Softstart
available in the 10-pin (DGS) micro-small outline
Overtemperature and Overcurrent Protected
package (MSOP) and operates over an free air
Available in 10-Pin Microsmall Outline
temperature range of –40°C to 85°C.
Package MSOP
APPLICATIONS
Cellular Phones
Organizers, PDAs, and Handheld PCs
Low Power DSP Supply
Digital Cameras and Hard Disks
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
MATHCAD is a registered trademark of Mathsoft Incorporated.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2011, 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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