TPS40303_15 Datasheet, PDF (1/37 Pages) Texas Instruments – TPS4030x 3-V to 20-V Input Synchronous Buck Controller

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TPS40303, TPS40304, TPS40305
SLUS964B – NOVEMBER 2009 – REVISED MAY 2015
TPS4030x 3-V to 20-V Input Synchronous Buck Controller
1 Features
•1 Input Voltage Range From 3 V to 20 V
• 300-kHz (TPS40303), 600-kHz (TPS40304), and
1.2-MHz (TPS40305) Switching Frequencies
• High- and Low-Side FET R_DS(on) Current Sensing
• Programmable Thermally Compensated OCP
Levels
• Programmable Soft-Start
• 600-mV, 1% Reference Voltage
• Voltage Feed-Forward Compensation
• Supports Prebiased Output
• Frequency Spread Spectrum
• Thermal Shutdown Protection at 145°C
• 10-Pin 3-mm × 3-mm SON Package With Ground
Connection to Thermal Pad
2 Applications
• POL Modules
• Printers
• Digital TVs
• Telecom
3 Description
The TPS4030x is a family of cost-optimized
synchronous buck controllers that operate from 3-V to
20-V input. The controller implements a voltage-mode
control architecture with input-voltage feed-forward
compensation that responds instantly to a change in
input voltage. The switching frequency is fixed at 300
kHz, 600 kHz, or 1.2 MHz.
The Frequency Spread Spectrum (FSS) feature adds
to the switching frequency, significantly reducing the
peak EMI noise and making it much easier to comply
with EMI standards.
The TPS4030x offers design with a variety of user-
programmable functions, including soft-start,
overcurrent protection (OCP) levels, and loop
compensation.
OCP level may be programmed by a single external
resistor connected from the LDRV pin to circuit
ground. During initial power on, the TPS4030x enters
a calibration cycle, measures the voltage at the LDRV
pin, and sets an internal OCP voltage level. During
operation, the programmed OCP voltage level is
compared to the voltage drop across the low-side
FET when it is on to determine whether there is an
overcurrent condition. The TPS4030x then enters a
shutdown and restart cycle until the fault is removed.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS40303
TPS40304
VSON (10)
3.00 mm × 3.00 mm
TPS40305
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_OUT
SD
V
IN
Simplified Application Diagram
TPS4030x
5 FB
BOOT 6
4 COMP HDRV 7
3 PGOOD
SW 8
2 EN/SS LDRV/OC 9
1 VDD
GND
PAD
BP 10
V
IN
V
OUT
UDG-09158
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.