TPS62620 Datasheet, PDF (1/28 Pages) Texas Instruments – 600-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

TPS62620, TPS62621
CSP-6
TPS62622, TPS62623
TPS62624, TPS62625
www.ti.com ............................................................................................................................................................... SLVS848A – JULY 2009 – REVISED JULY 2009
600-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
IN CHIP SCALE PACKAGING
FEATURES
1
•23 90% 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
• Internal Soft Start, 120-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)
Regular and Ultra-Thin Packaging
APPLICATIONS
• Cell Phones, Smart-Phones
• WLAN, GPS and Bluetooth™ Applications
• DTV Tuner Applications
• DC/DC Micro Modules
V_BAT
2.3 V .. 5.5 V
C_I
2.2 mF
TPS6262x
VIN
EN
L
SW
0.47 mH
FB
GND
MODE
V_OUT
1.8 V @ 600mA
C_O
4.7 mF
Figure 1. Smallest Solution Size Application
DESCRIPTION
The TPS6262x device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6262x supports up to
600mA 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 TPS6262x 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 TPS6262x is available in an 6-pin chip-scale
package (CSP).
100
V_I = 3.6 V,
90 _{VO = 1.8 V}
80
70
Efficiency
PFM/PWM Operation
60
50
40
30
Power Loss
PFM/PWM Operation
20
10
0
0.1
1
10
100
I_O - Load Current - mA
200
180
160
140
120
100
80
60
40
20
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
Bluetooth is a trademark of Bluetooth SIG, Inc.
3
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 © 2009, Texas Instruments Incorporated