TPS40170-Q1_15 Datasheet, PDF (1/51 Pages) Texas Instruments – TPS40170-Q1 4.5-V to 60-V, Wide-Input, Synchronous PWM Buck Controller

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TPS40170-Q1
SLVSB90B – JANUARY 2012 – REVISED DECEMBER 2014
TPS40170-Q1 4.5-V to 60-V, Wide-Input, Synchronous PWM Buck Controller
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 1C
– Device CDM ESD Classification Level C4B
• Wide-Input Voltage Range from 4.5 V to 60 V
• 600-mV Reference Voltage With 1% Accuracy
• Programmable UVLO and Hysteresis
• Voltage-Mode Control With Voltage Feed-Forward
• Programmable Frequency Between 100 kHz and
600 kHz
• Bidirectional Frequency Synchronization With
Master and Slave Option
• Low-Side FET Sensing Overcurrent Protection
and High-Side FET Sensing Short-Circuit
Protection With Integrated Thermal Compensation
• Programmable Closed-Loop Soft-Start
• Supports Pre-Biased Outputs
• Thermal Shutdown at 165°C With Hysteresis
• Voltage Tracking
• Power Good
• ENABLE With 1-µA Low-Current Shutdown
• 8-V and 3.3-V LDO Output
• Integrated Bootstrap Diode
• 20-Pin 4.5-mm × 3.5-mm VQFN (RGY) Package
2 Applications
• Advanced Driver Assistance System (ADAS)
• Automotive Infotainment and Cluster
3 Description
The TPS40170-Q1 device is a full-featured,
synchronous PWM buck controller that operates at an
input voltage between 4.5 V and 60 V and is
optimized for high-power-density, high-reliability dc-dc
converter applications. The controller implements
voltage-mode control with input-voltage feed-forward
compensation that enables instant response to an
input voltage change. The switching frequency is
programmable from 100 kHz to 600 kHz.
The TPS40170-Q1 device has a complete set of
system protection and monitoring features such as
programmable UVLO, programmable overcurrent
protection (OCP) by sensing the low-side FET,
selectable short-circuit protection (SCP) by sensing
the high-side FET, and thermal shutdown. The
ENABLE pin allows for system shutdown in a low-
current (1-µA typical) mode. The controller supports
pre-biased output, provides an open-drain PGOOD
signal, and has closed-loop soft-start, output-voltage
tracking, and adaptive dead-time control.
The TPS40170-Q1 device provides accurate output-
voltage regulation within 1% accuracy. Additionally,
the controller implements a novel scheme of
bidirectional synchronization with one controller
acting as the master and other downstream
controllers acting as slaves, synchronized to the
master in-phase or 180° out-of-phase. Slave
controllers can be synchronized to an external clock
within ±30% of the free-running switching frequency.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS40170-Q1
VQFN (20)
4.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
V_IN
1
ENABLE
20
UVLO
2 SYNC
3 M/S
VIN 19
BOOT 18
4 RT
HDRV 17
5 SS
SW 16
TPS40170
6 TRK
VBP 15
7 FB
LDRV 14
8 COMP
PGND 13
9 AGND
VDD
10
ILIM 12
PGOOD
11
V
OUT
UDG-09219
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.