TPS65300-Q1
www.ti.com
SLVSBB6B –MARCH 2012–REVISED APRIL 2012
3-MHz Step-Down Regulator and Triple Linear Regulators
Check for Samples: TPS65300-Q1
1
FEATURES
DESCRIPTION
The TPS65300-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, and one low-
voltage linear regulator and two voltage-regulator
controllers.
•
•
•
Input VIN Range 5.6 V to 40 V, With Transients
up to 45 V
All Outputs Support Ceramic Output
Capacitors for Stability
Switch-Mode Regulator With Integrated High-
Side Switch
–
Recommended Switch-Mode Frequency
Range 2 MHz to 3 MHz
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 5-V regulator tracks the 3.3-V linear regulator
within the specified limits.
–
Overcurrent Protection and 1.2-A Peak
Switch Current
•
One Linear Regulators and Two Linear
Regulator Controllers With 0.8-V ±1.5%
Reference
•
•
Status Indicator Output of IGN_EN Input
Soft Start on Ignition (IGN_EN)/Enable Input
(EN) Cycle
The TPS65300-Q1 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.
•
•
External Clock Input for Synchronization
Programmable Power-On-Reset Delay, Reset-
Function Filter Timer for Fast Negative
Transients
•
Voltage Supervisor for the Following Supplies
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.
–
VREG, 3.3 V, 1.2 V
•
•
•
Thermal Shutdown Protection for Excessive
Power Dissipation
Space
Operating Junction Temperature Range: –40°C
to 150°C
VIN_D
2
4
BOOT
VI =5.6V to 40V
S1
3
1
0.1uf
L
Thermally Enhanced 24-Pin HTSSOP or 24-Pin
QFN Package
VIN
5.3W
Supply
PH
CI
5.3V
10uf
10uF
10uF
CO
S2
EN
9
22
14
VREG
COMP
IGN_EN
RT/CLK
R12
5
8
APPLICATIONS
C3
15
VSENSE
SS
R1
•
•
•
Power Supply for TMS570 Microcontrollers
Power Supply for C28XXX DSP
20
C1
TPS65300-Q1
3.3VDRIVE
3.3VSENSE
T1
19
18
BOOT_LDO
1uF
3.3V
5V
6
General-Purpose Power Supply for Automotive
Applications
660
2.2uF
5V
10
2.2uF
GND
12
21
–
Microcontroller and DSP
DELAY
C2
3k
nRST
23
1.2VDRIVE
1.2VSENSE
T2
17
16
1.2V
PGND
240
2.2uF
24
Figure 1. Typical Application Schematic
1
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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 © 2012, Texas Instruments Incorporated