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TPS62301 Datasheet

  • TPS62301

  • 采用 QFN 或芯片级封装的 1.5V、500mA、3MHz 步降转换器

  • 1688.00KB

  • 32页

  • TI

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QFN-10
CSP-8
TPS62300, TPS62301, TPS62302
TPS62303, TPS62305, TPS62311
TPS62313, TPS62320, TPS62321
SLVS528B 鈥?JULY 2004 鈥?REVISED JUNE 2005
www.ti.com
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
FEATURES
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Up to 93% Efficiency at 3-MHz Operation
Up to 500-mA Output Current at V
I
= 2.7 V
3-MHz Fixed Frequency Operation
Best in Class
Load and Line Transient
Complete 1-mm Component Profile Solution
-0.5% / +1.3% PWM DC Voltage Accuracy Over
Temperature
35-ns Minimum On-Time
Power-Save Mode Operation at Light Load
Currents
Fixed and Adjustable Output Voltage
Only 86-碌A Quiescent Current
100% Duty Cycle for Lowest Dropout
Synchronizable
On the Fly
to External
Clock Signal
Integrated Active Power-Down Sequencing
(TPS6232x only)
Available in a 10-Pin QFN (3 x 3 mm) and
Highly Reliable 8-Pin NanoFree鈩?and
NanoStar鈩?(CSP) Packaging
DESCRIPTION
The TPS623xx device is a high-frequency synchron-
ous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS623xx supports up to
500-mA load current and allows the use of tiny, low
cost chip inductor and capacitors.
The device is ideal for mobile phones and similar
portable applications powered by a single-cell Li-Ion
battery or by 3-cell NiMH/NiCd batteries. With an
output voltage range from 5.4 V down to 0.6 V, the
device supports the low-voltage TMS320鈩?DSP
family, processors in smart-phones, PDAs as well as
notebooks, and handheld computers.
The TPS62300 operates at 3-MHz fixed switching
frequency and enters the power-save mode operation
at light load currents to maintain high efficiency over
the entire load current range. For low noise appli-
cations, the device can be forced into fixed frequency
PWM mode by pulling the MODE/SYNC pin high. The
device can also be synchronized to an external clock
signal in the range of 3 MHz. In the shutdown mode,
the current consumption is reduced to less than 1
碌A.
The TPS623xx is available in a 10-pin leadless
package (3 x 3 mm QFN) and an 8-pin chip-scale
package (CSP).
100
90
80
Efficiency 鈭?%
70
60
50
40
30
20
10
0
0.1
1
10
100
1k
I
O
鈭?Load Current 鈭?mA
L = 2.2
碌H,
C
O
= 4.7
碌F
V
I
= 3.6 V,
V
O
= 1.8 V
APPLICATIONS
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Cell Phones, Smart-Phones
WLAN and Bluetooth鈩?Applications
Micro DC-DC Converter Modules
PDAs, Pocket PCs
USB-Based DSL Modems
Digital Cameras
2.7 V . . 6 V
V
I
C1
4.7
碌F
L1
SW B1
D1 1
碌H
VOUT
C2
C1 MODE/SYNC
ADJ
D2
A1 GND
FB
A2 VIN
B2 EN
TPS62303YZD
V
O
1.8 V/500 mA
C2
4.7
碌F
Figure 1. Smallest Solution Size Application
(Fixed Output Voltage)
Figure 2. Efficiency vs Load Current
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.
NanoFree, NanoStar, TMS320 are trademarks of Texas Instruments.
Bluetooth is a trademark of Bluetooth SIG, Inc.
PowerPAD is a trademark of Texas Instsruments.
UNLESS OTHERWISE NOTED this document contains PRO-
DUCTION DATA information current as of publication date. Prod-
ucts conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily
include testing of all parameters.
Copyright 漏 2004鈥?005, Texas Instruments Incorporated

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