Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- CONTENTS
- DESCRIPTION
- DEVICE RATINGS
- ABSOLUTE MAXIMUM RATINGS
- RECOMMENDED OPERATING CONDITIONS
- ELECTROSTATIC DISCHARGE (ESD) PROTECTION
- PACKAGE DISSIPATION RATINGS
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- DEVICE INFORMATION
- BLOCK DIAGRAM
- APPLICATION INFORMATION
- FUNCTIONAL DESCRIPTION
- Voltage Reference
- Oscillator
- Input Undervoltage Lockout (UVLO) and Startup
- Enable and Timed Turn On of the Outputs
- Output Voltage Sequencing
- Soft Start
- Output Voltage Regulation
- Feedback Loop and Inductor-Capacitor (L-C) Filter Selection
- Inductor-Capacitor (L-C) Selection
- Maximum Output Capacitance
- Minimum Output Capacitance
- Modifying The Feedback Loop
- Example: TPS54386 Buck Converter Operating at 12-V Input, 3.3-V Output and 400-mA(P-P) Ripple Current
- Bootstrap for the N-Channel MOSFET
- Light Load Operation
- SW Node Ringing
- Output Overload Protection
- Operating Near Maximum Duty Cycle
- Dual Supply Operation
- Cascading Supply Operation
- Multiphase Operation
- Bypass and FIltering
- Over-Temperature Protection and Junction Temperature Rise
- Power Derating
- PowerPAD Package
- PCB Layout Guidelines
- FUNCTIONAL DESCRIPTION
- DESIGN EXAMPLES
- ADDITIONAL REFERENCES
www.ti.com
DEVICE RATINGS
ABSOLUTE MAXIMUM RATINGS
(1)
RECOMMENDED OPERATING CONDITIONS
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
PACKAGE DISSIPATION RATINGS
(1) (2) (3)
TPS54383 , , TPS54386
SLUS774B – AUGUST 2007 – REVISED OCTOBER 2007
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
(1)
PART NUMBER OPERATING FREQUENCY (kHz) PACKAGE MEDIA UNITS (Pieces)
TPS54383PWP Tube 90
300
TPS54383PWPR Tape and Reel 2000
Plastic 14-Pin HTSSOP
TPS54386PWP Tube 90
600
TPS54386PWPR Tape and Reel 2000
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com .
VALUE UNIT
PVDD1, PVDD2, EN1, EN2 30
BOOT1, BOOT2 V
SW
+ 7
SW1, SW2 – 2 to 30
Input voltage range SW1, SW2 transient (< 50ns) – 3 to 31 V
BP 6.5
SEQ, ILIM2 – 0.3 to 6.5
FB1, FB2 – 0.3 to 3
SW1, SW2 output current 7 A
BP load current 35 mA
T
stg
Storage temperature – 55 to +165
T
J
Operating temperature – 40 to +150 ° C
Soldering temperature +260
(1) Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation should be limited to the
Recommended DC Operating Conditions detailed in this data sheet. Exposure to conditions beyond the operational limits for extended
periods of time may affect device reliability.
MIN MAX UNIT
V
PVDD2
Input voltage 4.5 28 V
Operating junction
T
J
– 40 +125 ° C
temperature
MIN UNIT
Human body model 2k
CDM 1.5k V
Machine Model 250
THERMAL IMPEDANCE
JUNTION-TO-THERMAL PAD T
A
= +25 ° C T
A
= +85 ° C
PACKAGE ( ° C/W) POWER RATING (W) POWER RATING (W)
Plastic 14-Pin HTSSOP (PWP) 2.07
(4)
1.6 1.0
(1) For more information on the PWP package, refer to TI Technical Brief (SLMA002A ).
(2) TI device packages are modeled and tested for thermal performance using printed circuit board designs outlined in JEDEC standards
JESD 51-3 and JESD 51-7.
(3) For application information, see the Power Derating section.
(4) T
J-A
= +40 ° C/W.
2 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS54383 TPS54386