TPS62300_07 Datasheet, PDF (1/37 Pages) Texas Instruments – 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

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TPS62300, TPS62301, TPS62302
QFN-10 CSP-8
TPS62303, TPS62304, TPS62305,
TPS62311, TPS62313, TPS62315, TPS62320, TPS62321
SLVS528E – JULY 2004 – REVISED NOVEMBER 2007
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
FEATURES
1
•234 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-µA 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), 8-Pin
NanoFree™, and NanoStar™ (CSP) Packaging
APPLICATIONS
• Cell Phones, Smart-Phones
• WLAN and Bluetooth™ 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 µF
TPS62303YZD
A2 _VIN
SW ^B1
B2 _EN
VOUT ^D1
L1
1 µH
C1 _{MODE/SYNC ADJ} C2
A1 _GND
FB ^D2
V_O
C2 ^{1.8 V/500 mA}
4.7 µF
Figure 1. Smallest Solution Size Application
(Fixed Output Voltage)
DESCRIPTION
The TPS623xx device is a high-frequency
synchronous 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™ 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
applications, 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 µA.
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
V_I = 3.6 V,
V_O = 1.8 V
80
70
60
50
40
30
20
10
0
0.1
L = 2.2 µH,
C_O = 4.7 µF
1
10
100
1k
I_O − Load Current − mA
Figure 2. Efficiency vs Load Current
1
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.
2
Bluetooth is a trademark of Bluetooth SIG, Inc.
3
PowerPAD is a trademark of Texas Instsruments.
4
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 © 2004–2007, Texas Instruments Incorporated