TPS54386-Q1 Datasheet, PDF (1/50 Pages) Texas Instruments – 3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET

TPS54386-Q1
www.ti.com
SLUSAZ9A – MARCH 2012 – REVISED MARCH 2012
3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET
Check for Samples: TPS54386-Q1
FEATURES
1
•23 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following
Results:
– Device Temperature Grade 2: –40°C to
+105°C Ambient Operating Temperature
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• 4.5-V to 28-V Input Range
• Output Voltage Range 0.8 V to 90% of Input
Voltage
• Output Current Up to 3 A
• Fixed Switching Frequency: 600 kHz
• Three Selectable Levels of Overcurrent
Protection (Output 2)
• 0.8-V 1.5% Voltage Reference
• 2.1-ms Internal Soft Start
• Dual PWM Outputs 180° Out-of-Phase
• Ratiometric or Sequential Startup Modes
Selectable by a Single Pin
• 85-mΩ Internal High-Side MOSFETs
• Current Mode Control
• Internal Compensation
• Pulse-by-Pulse Overcurrent Protection
• Thermal Shutdown Protection at 148°C
• 14-Pin PowerPAD™ HTSSOP Package
APPLICATIONS
• Power for DSP
• Consumer Electronics
CONTENTS
Device Ratings
2
Electrical Characteristics
3
Device Information
9
Application Information
12
Design Examples
32
Additional References
44
DESCRIPTION
The TPS54386-Q1 are dual-output, non-synchronous
buck converters capable of supporting 3-A output
applications that operate from a 4.5-V to 28-V input
supply voltage, and require output voltages between
0.8 V and 90% of the input voltage.
With an internally-determined operating frequency,
soft-start time, and control-loop compensation, these
converters provide many features with a minimum of
external components. Channel-1 overcurrent
protection is set at 4.5 A, whereas the channel-2
overcurrent protection level is selected by connecting
a pin to ground, to BP, or left floating. The setting
levels are used to allow for scaling of external
components for applications that do not need the full
load capability of both outputs.
The outputs may be enabled independently, or may
be configured to allow either ratiometric or sequential
start-up sequencing. Additionally, the two outputs
may be powered from different sources.
V_IN
OUTPUT1
TPS54386
1 PVDD1 PVDD2 14
2 BOOT1 BOOT2 13
3 SW1
SW2 12
4 GND
BP 11
5 EN1
SEQ 10
6 EN2
ILIM2 9
7 FB1
FB2 8
GND
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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