TPS62692_16 Datasheet, PDF (1/31 Pages) Texas Instruments – 800-mA , 3-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

CSP-6
TPS62692, TPS62693
TPS62694, TPS62698
www.ti.com
SLVSAZ1 – DECEMBER 2012
800-mA , 3-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
Check for Samples: TPS62692, TPS62693, TPS62694, TPS62698
FEATURES
1
•23 95% Efficiency at 3MHz Operation
• 21 μA Quiescent Current
• 3 MHz Regulated Frequency Operation
• Spread Spectrum, PWM Frequency Dithering
• High Duty-Cycle Operation
• ±2% Total DC Voltage Accuracy
• Best in Class Load and Line Transient
• Excellent AC Load Regulation
• Low Ripple Light-Load PFM Mode
• ≥40 dB V_IN PSRR (1 kHz to 10 kHz)
• Internal Soft Start, 350-μs Start-Up Time
• Integrated Active Power-Down Sequencing
(Optional)
• Current Overload and Thermal Shutdown
Protection
• Three Surface-Mount External Components
Required (One 2012 MLCC Inductor, Two 0402
Ceramic Capacitors)
• Complete Sub 1-mm Component Profile
Solution
• Total Solution Size <12 mm² (CSP)
• Available in a 6-Pin NanoFree™ (CSP)
DESCRIPTION
The TPS62693 device is a high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS62693 supports up to
800-mA load current, and allows the use of 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. Different fixed output voltage versions are
available in the range from 2.2 V up to 3.3 V.
The TPS62693 operates at a regulated 3-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 21 μA (typical) during light
load operation. For noise-sensitive applications, the
device can be forced into fixed frequency PWM mode
by pulling the MODE pin high. This feature, combined
with high PSRR and AC load regulation performance,
make this device suitable to replace a linear regulator
to obtain better power conversion efficiency.
APPLICATIONS
• Memory Cards
• LDO Replacement
• Cell Phones, Smart-Phones
• WLAN, Bluetooth™ Applications
V_IN
3.15 V ... 4.8 V
C_I
2.2 mF
TPS62693
VIN
SW
L
1.0 mH
EN
FB
GND
MODE
V_OUT
2.85 V @ 800mA
C_O
4.7 mF
Figure 1. Smallest Solution Size Application
100
90
80
70
60
50
40
30
20
10
VOUT = 2.85V
0
0.1
1
10
Current (mA)
VIN = 3.0V
VIN = 3.6V
VIN = 4.2V
VIN = 3.6V (PWM)
100
1000
G000
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.
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 © 2012, Texas Instruments Incorporated