TPS62933
SLUSEA4A – JUNE 2021 – REVISED DECEMBER 2021
TPS62933 3.8-V to 30-V, 3-A Synchronous Buck Converter in SOT583 Package
1 Features
3 Description
•
Configured for a wide range of applications
– Input voltage range: 3.8 V to 30 V
– Output voltage range: 0.8 V to 22 V
– 3-A continuous output current
– 0.8V ± 1% reference voltage (25°C)
– Operating junction temperature: –40°C to
150°C
– Integrated 76-mΩ and 32-mΩ MOSFETs
– Ultra-low quiescent current: 12 μA (typical)
– Low shutdown current: 2 μA (typical)
– Maximum 98% duty cycle operation
– Precision EN threshold
Ease of use and small solution size
– Peak current control mode with internal
compensation
– Pulse frequency modulation for high light-load
efficiency
The TPS62933 is a high-efficiency, easy-to-use
synchronous buck converter with a wide input voltage
range of 3.8 V to 30 V, and supports up to 3-A
continuous output current and 0.8-V to 22-V output
voltage.
The device employs fixed-frequency peak current
control mode for fast transient response and good
line and load regulation. The optimized internal
loop compensation eliminates external compensation
components over a wide range of output voltage
and operation frequency. Pulse frequency modulation
(PFM) mode maximizes the light load efficiency.
The ULQ (ultra low quiescent) feature is extremely
beneficial for long battery life time in low-power
operation. The switching frequency can be set by the
configuration of the RT pin in the range of 200 kHz
to 2.2 MHz, which allows the user to optimize system
efficiency, solution size, and bandwidth. The soft-start
time can be adjusted by the external capacitor at the
SS pin, which can minimize the inrush current when
driving large capacitive load. This device also has
frequency spread spectrum feature, which helps with
lowering down EMI noise.
•
– Adjustable soft-start time
– Selectable frequency: 200 kHz to 2.2 MHz
– EMI friendly with Frequency Spread Spectrum
– Support start-up with pre-biased output
– Cycle-by-cycle OC limit for both high-side and
low-side MOSFETs
– Non-latched protections for OTP, OCP, OVP,
UVP, and UVLO
– 1.6-mm × 2.1-mm SOT583 package
Create a custom design using the TPS62933 with
the WEBENCH Power Designer
The device provides complete protections including
OTP, OVP, UVLO, cycle-by-cycle OC limit, and UVP
with hiccup mode. This device is in a small SOT583
(1.6-mm × 2.1-mm) package with 0.5-mm pin pitch,
and has an optimized pinout for easy PCB layout and
promotes good EMI performance.
•
2 Applications
•
•
•
•
•
Building automation, appliances, industrial PC
Multifunction printers, enterprise projectors
Portable electronics, connected peripherals
Smart speakers, monitors
Distributed power systems with 5-V, 12-V, 19-V,
24-V input
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
TPS62933
SOT583 (8)
1.60 mm × 2.10 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
VIN
VIN
GND
EN
BST
SW
FB
CBST
CIN
L
90
VOUT
RFBT
80
VEN
COUT
RFBB
70
SS
RT
60
VOUT=3.3V
VOUT=5V
VOUT=12V
Simplified Schematic
50
0.001
0.005
0.02 0.05 0.1 0.2
I-Load (A)
0.5
1
2 3
Efficiency, VIN = 24 V, fSW = 500 kHz
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.
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