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PDF LSP3130 Data sheet ( Hoja de datos )
| Número de pieza | LSP3130 | |
| Descripción | PWM Control 2A Step-Down Converter | |
| Fabricantes | Lite-On | |
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Liteon Semiconductor Corporation
LSP3130
PWM Control 2A Step-Down Converter
FEATURES
z Input voltage: 3.6V to 18V.
z Output voltage: 0.8V to VCC.
z Duty ratio: 0% to 100% PWM control
z Oscillation frequency: 300KHz typ.
z Soft-start, Current limit, Enable function
z Thermal Shutdown function
z Built-in internal SW P-channel MOSFET
z SOP8L Package.
TYPICAL APPLICATION
z PC Motherboard
z LCD Monitor
z Graphic Card
z DVD-Video Player
z Telecom Equipment
z ADSL Modem
z Printer and other Peripheral Equipment
z Microprocessor core supply
z Networking power supply
PIN ASSIGNMENT
(Top View)
FB 1
EN 2
OCSET 3
VCC 4
8 VSS
7 VSS
6 OUTPUT
5 OUTPUT
GENERAL DESCRIPTION
LSP3130 consists of step-down switching regulator
with PWM control. These devices include a
reference voltage source, oscillation circuit, error
amplifier, internal PMOS and etc.
LSP3130 provides low-ripple power, high efficiency,
and excellent transient characteristics. The PWM
control circuit is able to vary the duty ratio linearly
from 0 up to 100%. This converter also contains an
error amplifier circuit as well as a soft-start circuit
that prevents overshoot at startup. An enable
function, an over current protect function and a
short circuit protect function are built inside, and
when OCP or SCP happens, the operation
frequency will be reduced from 300KHz to 50KHz.
Also, an internal compensation block is built in to
minimum external component count.
With the addition of an internal P-channel Power
MOS, a coil, capacitors, and a diode connected
externally, these ICs can function as step-down
switching regulators. They serve as ideal power
supply units for portable devices when coupled with
the SOP8L mini-package, providing such
outstanding features as low current consumption.
Since this converter can accommodate an input
voltage up to 18V, it is also suitable for the operation
via an AC adapter.
PIN DESCRIPTION
Pin Number Pin Name
Pin Description
1 FB Feedback Pin
Power-off Pin
2 EN H: Normal operation(Step-down operation)
L: Step-down operation stopped(All circuits deactivated)
3 OCSET Add an external resistor to set max output current
4 VCC IC power supply pin
5,6
OUTPUT
Switch pin. Connect external inductor/diode here. Minimize trace area at this pin to
reduce EMI.
7,8 VSS GND pin
1/7 Rev1.0
1 page  
Liteon Semiconductor Corporation
LSP3130
PWM Control 2A Step-Down Converter
TYPICAL CHARACTERISTICS
5/7 Rev1.0
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LSP3130.PDF ] | |
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