TPS62684_15 Datasheet, PDF (1/27 Pages) Texas Instruments – TPS62684 1600-mA, High-Efficiency Step-Down Converter Optimized for Smallest Solution Size

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TPS62684 1600-mA, High-Efficiency Step-Down Converter
Optimized for Smallest Solution Size
TPS62684
SLVSAC5 – APRIL 2014
1 Features
•1 VIN Range From 3.25V to 5.5V
• Total Solution Size <12 mm²
• Three Surface-Mount External Components
Required (One 0805 MLCC Inductor, Two small
Ceramic Capacitors)
• Complete Sub 1-mm Component Profile Solution
• Spread Spectrum, PWM Frequency Dithering
• Best in Class Load and Line Transient
• ±2% Total DC Voltage Accuracy
• Up to 1600mA load current
• 5.5MHz Regulated Frequency Operation
• Available in a 6-Pin NanoFree™ (WCSP)
2 Applications
• Tablet PC
• Cell Phones, Smart-Phones
• Digital TV, WLAN, GPS and Bluetooth^®
Applications
3 Description
The TPS62684 is a high-frequency synchronous
step-down dc-dc converter optimized for battery-
powered portable applications in which high load
currents in a very small solution size and height are
required. The TPS62684 is optimized for high
efficiency and low output voltage ripple, supports up
to 1600-mA load current and allows the use of low
cost chip inductor and capacitors. With a input
voltage range of 3.25V to 5.5V, the device supports
applications powered by Li-Ion batteries as well as 5V
rails.
The TPS62684 operates at a 5.5-MHz switching
frequency with PWM spread spectrum capability. For
noise-sensitive applications, this provides a lower
noise regulated output, as well as low noise at the
input. The device supports a 2.85V fixed output
voltage, requiring no external feedback network.
These features, combined with high PSRR and AC
load regulation performance, make this device
suitable to replace a linear regulator to obtain better
power conversion efficiency.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
TPS62684YFF
DSBGA (6)
1.431mm × 1.135mm
Smallest Solution Size Application
V_BAT
3.25 V .. 5.5 V
TPS62684
VIN
SW
L
0.47 mH
V_{OUT =} 2.85 V
C_I
1.5 mF
AVIN
EN
FB
GND
C_O
10 mF
space
space
space
Efficiency vs Load Current
100
TPS62684
90 ^{VOUT = 2.85V}
80
70
60
50
40
30
20
10
0
1
VIN = 3.3V
VIN = 3.6V
VIN = 4.2V
VIN = 5.0V
VIN = 5.5V
10
100
1000 2000
Current (mA)
G000
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.