TPS62200_15 Datasheet, PDF (1/28 Pages) Texas Instruments – TPS6220x High-Efficiency, SOT23 Step-Down, DC-DC Converter

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TPS62200, TPS62201, TPS62202, TPS62203
TPS62204, TPS62205, TPS62207, TPS62208
SLVS417F – MARCH 2002 – REVISED JUNE 2015
TPS6220x High-Efficiency, SOT23 Step-Down, DC-DC Converter
1 Features
•1 High-Efficiency Synchronous Step-Down
Converter With up to 95% Efficiency
• 2.5-V to 6-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-µA Typical Quiescent Current
• Soft Start
• 100% Duty Cycle Low-Dropout Operation
• Dynamic Output-Voltage Positioning
• Available in a 5-Pin SOT23 Package
2 Applications
• PDAs and Pocket PCs
• Cellular Phones and Smart Phones
• Low Power DSP Supplies
• Digital Cameras
• Portable Media Players
• Portable Equipment
Typical Application Schematic
V_I
2.5 V − 6 V
C1
4.7 mF
TPS62202
L1
1 _VI
5 ^{10 mH}
SW
2
GND
3
EN
4
FB
V_O
1.8 V / 300 mA
C2
10 mF
(Fixed Output Voltage Version)
3 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 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 µA; therefore, it
achieves the highest efficiency over the entire load
current range. The TPS6220x needs only three small
external components. Together with the SOT23
package, a minimum system solution size is
achieved. An advanced fast response voltage mode
control scheme achieves superior line and load
regulation with small ceramic input and output
capacitors.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS6220x
SOT-23 (5)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Load Current
100
95 ^{VO = 1.8 V}
90 V_I = 2.7 V
85
80
V_I = 3.7 V
75
70
V_I = 5 V
65
60
55
50
45
40
0.010
0.100 1
10
100
I_L −Load Current − mA
1000
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.