TPS62933 3.8-V to 30-V, 3-A Synchronous Buck Converter in SOT583 Package

1 Features

• 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

– 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

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

3 Description

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.

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.

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.

L

C

BST

C

OUT

R

FBT

R

FBB

VIN

GND

EN

SS

BST

SW

FB

RT

C

IN

V

IN

V

OUT

V

EN

Simplified Schematic

I-Load (A)

0.001

0.005

0.02

0.05 0.1

0.2

0.5

1

2 3

50

60

70

80

90

100

VOUT=3.3V

VOUT=5V

VOUT=12V

TPS62933

SLUSEA4A – JUNE 2021 – REVISED DECEMBER 2021

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.