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QFN-10 CSP-8
SLVS528E – JULY 2004 – REVISED NOVEMBER 2007
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
1
FEATURES
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
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234
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
80
V
I
= 3.6 V,
V
O
= 1.8 V
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APPLICATIONS
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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
B2 EN
VOUT
C1 MODE/SYNC
ADJ
A1 GND
FB
B1
D1
C2
D2
L1
1
µH
C2
V
O
1.8 V/500 mA
Efficiency − %
70
60
50
40
30
20
L = 2.2
µH,
C
O
= 4.7
µF
0.1
1
10
100
1k
4.7
µF
Figure 1. Smallest Solution Size Application
(Fixed Output Voltage)
10
0
I
O
− Load Current − mA
Figure 2. Efficiency vs Load Current
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2
3
4
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.
Copyright © 2004–2007, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
