TPS5430-Q1_15 Datasheet, PDF (1/33 Pages) Texas Instruments – TPS5430-Q1 3-A Wide-Input-Range Step-Down Converter

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TPS5430-Q1
SLVS751D – NOVEMBER 2007 – REVISED JULY 2015
TPS5430-Q1 3-A Wide-Input-Range Step-Down Converter
1 Features
•1 Qualified for Automotive Applications
• Wide Input Voltage Range: 5.5 V to 36 V
• Up to 3-A Continuous (4-A Peak) Output Current
• High Efficiency up to 95% Enabled by 110-mΩ
Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down to
1.22 V With 1.5% Initial Accuracy
• Internal Compensation Minimizes External Parts
Count
• Fixed 500-kHz Switching Frequency for Small
Filter Size
• Improved Line Regulation and Transient
Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting,
Overvoltage Protection, and Thermal Shutdown
• –40°C to 125°C Operating Junction Temperature
Range
• Available in Small Thermally Enhanced 8-Pin
SOIC PowerPAD™ Package
2 Applications
• Car Audio Power Supplies
• High-Power LED Supplies, Battery Chargers
• 12-V and 24-V Supplied Systems
3 Description
The TPS5430-Q1 is a high output current PWM
converter that integrates a low-resistance high side
N-channel MOSFET. Included on the substrate with
the listed features are a high-performance voltage
error amplifier that provides tight voltage regulation
accuracy under transient conditions, an undervoltage
lockout (UVLO) circuit to prevent start-up until the
input voltage reaches 5.5 V, an internally set slow-
start circuit to limit inrush currents, and a voltage
feed-forward circuit to improve the transient
response. Using the enable (ENA) pin, shutdown
supply current is reduced to 18 μA typically. Other
features include an active-high enable, overcurrent
limiting, overvoltage protection (OVP), and thermal
shutdown. To reduce design complexity and external
component count, the TPS5430-Q1 feedback loop is
internally compensated. The TPS5430-Q1 regulates
a wide variety of power sources including 24-V
buses.
The TPS5430-Q1 device is available in a thermally
enhanced, easy-to-use 8-pin SOIC PowerPAD™
package. TI provides evaluation modules and the
WEBENCH® software tool to aid in quickly achieving
high-performance power supply designs to meet
aggressive equipment development cycles.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS5430-Q1
SO PowerPAD (8) 4.89 mm × 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
VIN
PH
TPS5430
NC BOOT
NC
ENA VSENSE
GND
VOUT
Efficiency vs Output Current
100
95
90
85
80
75
70
65
V_I = 12 V
60
V_O = 5 V
f_s = 500 kHz
55
T_A = 25^oC
50
0 0.5 1 1.5 2 2.5 3 3.5
IO - Output Current - A
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.