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TPS62204DBV Datasheet

  • TPS62204DBV

  • HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER

  • 271.89KB

  • 17頁

  • TI

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TPS62200, TPS62201
TPS62202, TPS62203, TPS62207
TPS62204, TPS62205, TPS62208
SLVS417D 鈥?MARCH 2002 鈥?REVISED MAY 2004
HIGH-EFFICIENCY, SOT23
STEP-DOWN, DC-DC CONVERTER
FEATURES
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High Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
2.5 V to 6.0 V Input Voltage Range
Adjustable Output Voltage Range From 0.7 V
to V
I
Fixed Output Voltage Options Available
Up to 300 mA Output Current
1 MHz Fixed Frequency PWM Operation
Highest Efficiency Over Wide Load Current
Range Due to Power Save Mode
15-碌A(chǔ) Typical Quiescent Current
Soft Start
100% Duty Cycle Low-Dropout Operation
Dynamic Output-Voltage Positioning
Available in a Tiny 5-Pin SOT23 Package
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 碌A(chǔ); 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 regu-
lation with small ceramic input and output capacitors.
EFFICIENCY
vs
LOAD CURRENT
100
95
90
85
Efficiency 鈭?%
V
O
= 1.8 V
V
I
= 2.7 V
APPLICATIONS
PDAs and Pocket PC
Cellular Phones, Smart Phones
Low Power DSP Supply
Digital Cameras
Portable Media Players
Portable Equipment
TPS62202
V
I
2.5 V 鈭?6 V
1
2
3
EN
FB
V
I
GND
4
SW
L1
10
碌H
5
V
O
1.8 V / 300 mA
C2
10
碌F
80
75
70
65
60
55
50
45
40
0.010
0.100
1
V
I
= 5 V
V
I
= 3.7 V
C1
4.7
碌F
Figure 1. Typical Application
(Fixed Output Voltage Version)
10
100
1000
I
L
鈭扡oad Current 鈭?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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2002鈥?004, Texas Instruments Incorporated

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