TPS55340-Q1_16 Datasheet, PDF (1/37 Pages) Texas Instruments – Integrated 5-A, Wide Input Range Boost, SEPIC, or Flyback DC-DC Converter

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TPS55340-Q1
SLVSBV5A – JUNE 2014 – REVISED JULY 2016
TPS55340-Q1 Integrated 5-A, Wide Input Range
Boost, SEPIC, or Flyback DC-DC Converter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C6
• Internal 5-A, 40-V Low-Side MOSFET Switch
• 2.9 to 38-V Input Voltage Range
• ±0.7% Reference Voltage
• 0.5-mA Operating Quiescent Current
• 2.7-µA Shutdown Supply Current
• Fixed-Frequency Current Mode PWM Control
• Frequency Adjustable from 100 kHz to 2.5 MHz ⁽¹⁾
• Synchronization Capability to External Clock
• Adjustable Soft-Start Time
• Pulse-Skipping for Higher Efficiency at Light
Loads
• Cycle-by-Cycle Current-Limit, Thermal Shutdown,
and UVLO Protection
• WQFN-16 (3 mm × 3 mm) Package with
PowerPad™
• Wide –40°C to 150°C Operating T_J Range
2 Applications
• Boost, SEPIC, and Flyback Topologies
• Automotive Pre-Boost Applications to Support
Start-Stop Requirements
• USB Power Delivery
• Industrial Power Systems
(1) For limitations, see the Switching Frequency section.
3 Description
The TPS55340-Q1 device is a monolithic non-
synchronous switching converter with integrated 5-A,
40-V power switch. The device can be configured in
several standard switching-regulator topologies,
including boost, SEPIC and isolated flyback. The
device has a wide input voltage range to support
applications with input voltage from 2.9 to 38-V.
The TPS55340-Q1 device regulates the output
voltage with current mode PWM (pulse width
modulation) control, and has an internal oscillator.
The switching frequency of PWM is set by either an
external resistor or by synchronizing to an external
clock signal. The user can program the switching
frequency from 100 kHz to 2.5 MHz.
The device features a programmable soft-start
function to limit inrush current during start-up and has
other built-in protection features including cycle-by-
cycle over current-limit and thermal shutdown.
The TPS55340-Q1 device is available in a small 3-
mm × 3-mm 16-pin WQFN package with PowerPad
for enhanced thermal performance.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS55340-Q1
WQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application for Boost
VI
L
D
VO
R(FREQ)
CSS
CI
R(C)
C(C)
TPS55340-Q1
VIN
SW
EN
SW
FREQ
SW
SS
FB
COMP PGND
SYNC PGND
AGND PGND
CO
R(SH)
R(SL)
Efficiency vs Output Current
100
95
90
85
80
75
70
65
V_VI_I =₌ 5₅ V_V
60
V_O = 24 V
V_II == 1122 VV
55
ƒ_S = 600 kHz
V^V_II ^{== 1155 VV}
50
0.0
0.4
0.8
1.2
1.6
2.0
2.4
Output Current (A)
C021
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.