TPS65301-Q1 Datasheet, PDF (1/38 Pages) Texas Instruments – 3-MHz Step-Down Regulator and Triple Linear Regulators and Protected Sensor Supply

TPS65301-Q1
www.ti.com
SLVSC10B – OCTOBER 2013 – REVISED DECEMBER 2013
3-MHz Step-Down Regulator and Triple Linear Regulators and Protected Sensor Supply
Check for Samples: TPS65301-Q1
FEATURES
1
• Input VIN Range 5.75 V to 40 V, With
Transients up to 45 V
• All Outputs Support Ceramic Output
Capacitors for Stability
• 5.45-V Switch-Mode Regulator With Integrated
High-Side Switch
– Recommended Switch-Mode Frequency
Range 2 MHz to 3 MHz
• Overcurrent Protection and 1.2-A Peak Switch
Current
• One Linear Regulator 5 V ±2%
• Two Linear Regulator Controllers With 3.3-V
resp. 1.2 V ±2%
• Protected 5-V Sensor Supply Output, Which
Tracks 3.3-V Supply
• Status Indicator Output of IGN_EN Input
• Soft Start on Ignition (IGN_EN) and Enable
Input (EN) Cycle
• External Clock Input for Synchronization
• Programmable Power-On-Reset Delay, Reset-
Function Filter Timer for Fast Negative
Transients
• Voltage Supervisor for the Following Supplies
– VREG, 3.3 V, 1.2 V
• Thermal Shutdown Protection for Excessive
Power Dissipation
• Operating Junction Temperature Range up to
150°C
• Thermally Enhanced 24-Pin HTSSOP or 24-Pin
QFN Package
APPLICATIONS
• Power Supply for TMS570 Microcontrollers
• Power Supply for C28XXX DSP
• General-Purpose Power Supply for Automotive
Applications
DESCRIPTION
The TPS65301-Q1 power supply is a combination of
a single switch-mode buck power supply and three
linear regulators. This is a monolithic high-voltage
switching regulator with an integrated 1.2-A peak
current switch, 45-V power MOSFET, one low-voltage
linear regulator, two voltage-regulator controllers and
a protected sensor supply.
The device has a voltage supervisor which monitors
the output of the switch-mode power supply, the 3.3-
V linear regulator, and the 1.2-V linear regulator. An
external timing capacitor is used to set the power-on
delay and the release of the reset output nRST. This
reset output is also used to indicate if the switch-
mode supply, the 3.3-V linear regulator supply, or the
1.2-V linear regulator supply is outside the set limits.
The protected sensor supply 5VS tracks the 3.3-V
linear regulator within the specified limits.
The TPS65301-Q1 device has a switching frequency
range from 2 MHz to 3 MHz, allowing the use of low-
profile inductors and low-value input and output
ceramic capacitors. External loop compensation gives
the user the flexibility to optimize the converter
response for the appropriate operating conditions.
This device has built-in protection features such as
soft start on IGN_EN ON or enables cycle, pulse-by-
pulse current limit, thermal sensing, and shutdown
due to excessive power dissipation.
VI = 5.6 V to 40 V
Supply
5VS
VIN_D
2
VIN ₄
BOOT
3
1 ^PH
EN
9
IGN_EN
5
RT/CLK ₈
SS
20
22
VREG
14
COMP
15 _VSENSE
TPS65301PWPR-Q1
BOOT_LDO ₆
19 ^3.3VDRIVE
3.3VSENSE
18
GND
12
10
DELAY
21
7
PGND
24
23 ^nRST
1.2VDRIVE
17
1.2VSENSE
16
5.45 V
3.3 V
5V
1.2 V
Figure 1. Typical Application Schematic
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated