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TPS5402 Datasheet Preview

TPS5402 Datasheet

NON-SYNCHRONOUS STEP-DOWN REGULATOR

No Preview Available !

TPS5402
www.ti.com
SLVSBK4 – SEPTEMBER 2012
3.5-V TO 28-V INPUT VOLTAGE, 1.7-A OUTPUT CURRENT,
NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET
Check for Samples: TPS5402
FEATURES
1
• 3.5-V to 28-V Wide Input Voltage Range
• Up to 1.7-A Maximum Continuous Output
Loading Current
• Pulse Skipping Mode to Achieve High Light
Load Efficiency
• High Light Load Efficiency
• Frequency Spread Spectrum to Reduce EMI
• Adjustable 50-kHz to 1.1-MHz Switching
Frequency Set by an External Resistor
(Leave pin ROSC floating. Set frequency to
120 kHz and ground connection to 70 kHz)
• Frequency Spread Spectrum to Ease EMI Issue
• Peak Current-Mode Control
• Cycle-by-Cycle Over Current Protection
• External Soft Start
• Available in SOIC8 Package
APPLICATIONS
• 5-V, 9-V, 12-V and 24-V Distributed Power
Systems
• Consumer Applications Such as Home
Appliances, Set-Top Boxes, CPE Equipment,
LCD Displays, Peripherals, and Battery
Chargers
• Industrial and Car Entertainment Power
Supplies
DESCRIPTION
The TPS5402 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 3.5 V
to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.
TPS5402 also features a light load pulse skipping mode, which allows for a power loss reduction from the input
power supply to the system at light loading.
The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor.
Frequency spread spectrum operation is introduced for EMI reduction.
A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.
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.
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




etcTI

TPS5402 Datasheet Preview

TPS5402 Datasheet

NON-SYNCHRONOUS STEP-DOWN REGULATOR

No Preview Available !

TPS5402
SLVSBK4 – SEPTEMBER 2012
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
TYPICAL APPLICATION
Cboot
Lo
Vout
1
BOOT
8
LX
Cin
Vin 2
7
VIN
GND
TPS5402
3
ROSC
6
COMP
Rosc
4
SS
5
VSENSE
Css
D
Rc
Cc
Cout
Rfb1
Rfb2
FUNCTIONAL BLOCK DIAGRAM
VIN
165C
Thermal
Shutdown
VSENSE
Minimum Clamp
2uA
SS
gm
0.8V
Voltage
Reference
Discharge
Logic
Shutdown
COMP
Maximum
Clamp
Shutdown
Shutdown
Logic
Boot
Charge
PWM
Comparator
Gate
Drive
Logic
Boot
UVLO
2.1V
PWM
Latch
RQ
S
9A/V
Current
Sense
Σ
Slope
Compensation
BOOT
LX
VSENSE
Frequency
Shift
Oscillator
GND
ROSC
2
Submit Documentation Feedback
Product Folder Links: TPS5402
Copyright © 2012, Texas Instruments Incorporated


Part Number TPS5402
Description NON-SYNCHRONOUS STEP-DOWN REGULATOR
Maker etcTI
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TPS5402 Datasheet PDF






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