TPS62660_15 Datasheet, PDF (1/29 Pages) Texas Instruments – 1000-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

CSP-6
TPS62660, TPS62665
www.ti.com
SLVS871C – FEBRUARY 2010 – REVISED JULY 2011
1000-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
Check for Samples: TPS62660, TPS62665
FEATURES
1
•2 91% Efficiency at 6MHz Operation
• 31μA Quiescent Current
• Wide V_IN Range From 2.3V to 5.5V
• 6MHz Regulated Frequency Operation
• Best in Class Load and Line Transient
• ±2% Total DC Voltage Accuracy
• Automatic PFM/PWM Mode Switching
• Low Ripple Light-Load PFM Mode
• Fast Turn-On Time, <60-μs Start-Up Time
• Integrated Active Power-Down Sequencing
(Optional)
• Current Overload and Thermal Shutdown
Protection
• Three Surface-Mount External Components
Required (One MLCC Inductor, Two Ceramic
Capacitors)
• Complete Sub 1-mm Component Profile
Solution
• Total Solution Size <12 mm²
• Available in a 6-Pin NanoFree™ (CSP)
APPLICATIONS
• Cell Phones, Smart-Phones
• PDAs, Pocket PCs
• Portable Hard Disk Drives
• DC/DC Micro Modules
V_BAT
3.0 V .. 5.5 V
C_I
4.7 mF
TPS62661
VIN
EN
L
SW
0.47 mH
FB
GND
MODE
V_OUT
1.8 V @ 1000mA
C_O
4.7 mF
Figure 1. Smallest Solution Size Application
DESCRIPTION
The TPS6266x device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6266x supports up to
1000mA peak load current, and allows the use of low
cost chip inductor and capacitors.
With a wide input voltage range of 2.3V to 5.5V, the
device supports applications powered by Li-Ion
batteries with extended voltage range. Different fixed
voltage output versions are available from 1.2V to
2.3V.
The TPS6266x operates at a regulated 6-MHz
switching frequency and enters the power-save mode
operation at light load currents to maintain high
efficiency over the entire load current range.
The PFM mode extends the battery life by reducing
the quiescent current to 31μA (typ) during light load
and standby operation. For noise-sensitive
applications, the device can be forced into fixed
frequency PWM mode by pulling the MODE pin high.
In the shutdown mode, the current consumption is
reduced to less than 1μA.
The TPS6266x is available in an 6-pin chip-scale
package (CSP).
100
V_I = 3.6 V,
90 V_O = 1.8 V
80
70
Efficiency
PFM/PWM Operation
60
50
40
30
20
10
0
0.1
Power Loss
PFM/PWM Operation
1
10
100
I_O - Load Current - mA
500
450
400
350
300
250
200
150
100
50
0
1000
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 is a trademark of Texas Instruments.
2
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 © 2010–2011, Texas Instruments Incorporated