TPS40170_15 Datasheet, PDF (1/47 Pages) Texas Instruments – TPS40170 4.5 V to 60 V Wide Input Synchronous PWM Buck Controller

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TPS40170
SLUS970B – NOVEMBER 2013 – REVISED DECEMBER 2014
TPS40170 4.5 V to 60 V Wide Input Synchronous PWM Buck Controller
1 Features
•1 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
• Bi-directional -Frequency Synchronization With
Master/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
• Powergood
• ENABLE with 1-µA Low Current Shutdown
• 8.0-V and 3.3-V LDO Output
• Integrated Bootstrap Diode
• 20-Pin 3.5 mm × 4.5 mm VQFN (RGY) Package
2 Applications
• POL Modules
• Wide Input Voltage, High-Power Density DC - DC
Converters for Industrial, Networking and Telecom
Equipment
Simplified Application
V_IN
1
ENABLE
20
UVLO
2 SYNC
VIN 19
3 M/S
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
3 Description
TPS40170 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 input voltage change. The
switching frequency is programmable from 100 kHz to
600 kHz.
The TPS40170 has a complete set of system
protection and monitoring features such as
programmable undervoltage lockout (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.
TPS40170 provides accurate output voltage
regulation through 1% ensured accuracy.
Additionally, the controller implements a novel
scheme of bi-directional 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
VQFN (20)
3.50 mm × 4.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs. Load Current
100
95
90
85
80
VIN = 12 V
75
VIN = 24 V
VIN = 48 V
70
0
1
2
3
4
5
6
Load Current (A)
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.