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TD1482A Datasheet

2A 20V Synchronous Rectified Step-Down Converte

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Techcode®
2A 20V Synchronous Rectified Step-Down Converte
DATASHEET
TD1482A
General Description
Features
The TD1482A is a monolithic pulse-width-modulated (PWM)
synchronous step-down switch mode regulator with two
internal power MOSFETs. It achieves 2A continuous output
current over a wide input supply range with excellent load
and line regulation. Current mode operation provides fast
transient response and eases loop stabilization. Fault
condition protection includes cycle-by-cycle current limit and
thermal shutdown.
This device, available in an SOP8 package, provides a
very compact solution with minimal external components.
2A Output Current
Wide 4.75V to 20V Operating Input Range
Integrated 130mPower MOSFET Switches
Output Adjustable from 0.923V to 18V
Up to 93% Efficiency
Programmable Soft-Start
Stable with Low ESR CeramicOutputCapacitors
Fixed 340KHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Applications
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/ Appliances
Notebook Computers
Package Types
October, 20, 2010.
SOP8
Figure 1. Package Types of TD1482A
America Techcode Semiconductor, INC.
1
www.techcodesemi.com




Techcode

TD1482A Datasheet Preview

TD1482A Datasheet

2A 20V Synchronous Rectified Step-Down Converte

No Preview Available !

Techcode®
2A 20V Synchronous Rectified Step-Down Converte
Pin Configurations
DATASHEET
TD1482A
Pin Description
Figure 2 Pin Configuration of TD1482A(Top View)
Pin Number Pin Name Description
1 BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel
MOSFET switch. Connect a 0.01µF or greater capacitor from SW to BS to power the
high side switch.
2 IN
Supply Voltage. The TD1482A operates from a +4.75V to +20V unregulated input.
C1 is needed to prevent large voltage spikes from appearing at the input.
3 SW
Power Switching Output. SW is the switching node that supplies power to the output.
Connect the output LC filter from SW to the output load. Note that a capacitor is
required from SW to BS to power the high-side switch.
4 GND Ground.
5 FB
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB
with a resistive voltage divider from the output voltage. The feedback threshold
is 0.923V.
Compensation Node. COMP is used to compensate the regulation control loop.
Connect a series RC network from COMP to GND to compensate the regulation
6 COMP
control loop. In some cases, an additional capacitor from COMP to GND is
required.
7 EN
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to
turn on the regulator, drive it low to turn it off. Pull up with 100kresistor for
automatic startup.
8 SS
Soft-Start Control Input. SS controls the soft start period. Connect a capacitor from SS
to GND to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 15ms.
To disable the soft-start feature, leave SS unconnected.
October, 20, 2010.
America Techcode Semiconductor, INC.
2
www.techcodesemi.com


Part Number TD1482A
Description 2A 20V Synchronous Rectified Step-Down Converte
Maker Techcode
Total Page 15 Pages
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