www.ti.com
TPS62040
TPS62042, TPS62043
TPS62044, TPS62046
SLVS463A − JUNE 2003 − REVISED OCTOBER 2003
1.2 A/1.25 MHz, HIGH EFFICIENCY STEP DOWN CONVERTER
FEATURES
D
Up to 95% Conversion Efficiency
D
Typical Quiescent Current: 18
µA
D
Load Current: 1.2 A
D
Operating Input Voltage Range: 2.5 V to 6.0 V
D
Switching Frequency: 1.25 MHz
D
Adjustable and Fixed Output Voltage
D
Power Save Mode Operation at Light load
D
D
D
D
D
D
D
Currents
100% Duty Cycle for Lowest Dropout
Internal Softstart
Dynamic Output Voltage Positioning
Thermal Shutdown
Short-Circuit Protection
10 Pin MSOP PowerPad Package
10 Pin QFN 3 X 3 mm Package
D
D
D
D
D
USB Powered Modems
CPUs and DSPs
PC Cards and Notebooks
xDSL Applications
Standard 5-V to 3.3-V Conversion
DESCRIPTION
The TPS6204x family of devices are high efficiency
synchronous step-down dc-dc converters optimized for
battery powered portable applications. The devices are
ideal for portable applications powered by a single Li-Ion
battery cell or by 3-cell NiMH/NiCd batteries. With an
output voltage range from 6.0 V down to 0.7 V, the devices
support low voltage DSPs and processors in PDAs,
pocket PCs, as well as notebooks and subnotebook
computers. The TPS6204x operates at a fixed switching
frequency of 1.25 MHz and enters the power save mode
operation at light load currents to maintain high efficiency
over the entire load current range. For low noise
applications, the devices can be forced into fixed
frequency PWM mode by pulling the MODE pin high. The
TPS6204x supports up to 1.2-A load current.
APPLICATIONS
D
PDA, Pocket PC and Smart Phones
EFFICIENCY
vs
LOAD CURRENT
100
Typical Application Circuit 1.2-A Output Current
VI
2.5 V to 6 V
C1
22
µF
TPS6204x
2
3
VIN
1
EN
6
MODE
4
GND
VIN
7
SW
5
FB
10
PGND
9
PGND
SW
8
VO
0.7 V to VI /1.2 A
C2
22
µF
95
90
85
VO = 1.8 V
VI = 2.7 V
VI = 3.6 V
VI = 5 V
Efficiency − %
L1
6.2
µH
80
75
70
65
MODE = Low
60
55
50
45
40
0
0.01
0.1
1
10
VI = 3.6 V
MODE = High
100
1k
10 k
IL − Load Current − mA
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.
PowerPAD is a trademark of Texas Instruments.
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.
Copyright
2003, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
