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V
IN
L1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1µH
C
2
C
3
2.5 V to
5.5V
V
OUT
3.3V
2A
TPS63020
PG
Power Good
Output
C
1
2X10µF
0.1µF
4X22µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
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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.
TPS63020
,
TPS63021
SLVS916E –JULY 2010–REVISED MAY 2017
TPS6302x High Efficiency Single Inductor Buck-Boost Converter With 4-A Switches
1
1 Features
1
• Input Voltage Range: 1.8 V to 5.5 V
• Fixed and Adjustable Output Voltage Options from
1.2 V to 5.5 V
• Up to 96% Efficiency
• 3-A Output Current at 3.3 V in Step Down Mode
(V
IN
= 3.6 V to 5.5 V)
• More than 2-A Output Current at 3.3 V in Boost
Mode (V
IN
> 2.5 V)
• Automatic Transition Between Step Down and
Boost Mode
• Dynamic Input Current Limit
• Device Quiescent Current less than 50 μA
• Power Save Mode for Improved Efficiency at Low
Output Power
• Forced Fixed Frequency Operation at 2.4 MHz
and Synchronization Possible
• Smart Power Good Output
• Load Disconnect During Shutdown
• Overtemperature Protection
• Overvoltage Protection
• Available in a 3mm × 4mm 14-Pin VSON Package
(DSJ)
• Create a Custom Design Using the TPS6302x
with the WEBENCH Power Designer
2 Applications
• All Two-Cell and Three-Cell Alkaline, NiCd or
NiMH or Single-Cell Li Battery Powered Products
• Ultra Mobile PCs and Mobile Internet Devices
• Digital Media Players
• Digital Still Cameras (DSC) and Camcorders
• Mobile Phones and Smart Phones
• Personal Medical Products
• Industrial Metering Equipment
• High Power LEDs
SPACE
3 Description
The TPS6302x devices provide a power supply
solution for products powered by either a two-cell
or three-cell alkaline, NiCd or NiMH battery, or a
one-cell Li-ion or Li-polymer battery. Output
currents can go as high as 3 A while using a
single-cell Li-ion or Li-polymer battery, and
discharge it down to 2.5 V or lower. The buck-
boost converter is based on a fixed frequency,
pulse width modulation (PWM) controller using
synchronous rectification to obtain maximum
efficiency. At low load currents, the converter
enters power save mode to maintain high
efficiency over a wide load current range. The
power save mode can be disabled, forcing the
converter to operate at a fixed switching
frequency. The maximum average current in the
switches is limited to a typical value of 4 A. The
output voltage is programmable using an external
resistor divider, or is fixed internally on the chip.
The converter can be disabled to minimize
battery drain. During shutdown, the load is
disconnected from the battery.
The TPS6302x devices operate over a free air
temperature range of –40°C to 85°C. The devices
are packaged in a 14-pin VSON package
measuring 3mm × 4mm (DSJ).
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
TPS63020 VSON (14) Adjustable
TPS63021 VSON (14) 3.3 V
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Figure 1. Simplified Schematic
Figure 2. Efficiency vs Output Current
TPS6302x器件为采用两节或三节碱性电池，NiCd或NiMH电池或单
节锂离子或锂聚合物电池供电的产品提供电源解决方案。使用单节
锂离子或锂聚合物电池时，输出电流可高达3 A，并将其放电至2.5 V
或更低。该buckboost转换器是基于固定频率，脉宽调制（PWM）控
制器使用同步整流获得最大效率。在低负载电流下，转换器进入省
电模式，以在宽负载电流范围内保持高效率。省电模式可被禁用，
从而迫使转换器以固定的开关频率运行。开关中的最大平均电流限
制在4A的典型值。输出电压可使用外部电阻分压器进行编程，或者
内部固定在芯片上。该转换器可以禁用，以尽量减少电池消耗。在
关机期间，负载与电池断开。 TPS6302x器件可在-40°C至85°C的
自由空气温度范围内工作。器件采用尺寸为3mm×4mm（DSJ）的14
引脚VSON封装。
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