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Semtech Corporation - Simple PWM Boost Controller

Numéro de référence SC2603
Description Simple PWM Boost Controller
Fabricant Semtech Corporation 
Logo Semtech Corporation 





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SC2603 fiche technique
SC2603
Simple PWM Boost Controller
POWER MANAGEMENT
Description
Features
The SC2603 is a versatile, low-cost, voltage-mode PWM
controller designed for 16V input DC/DC power supply
applications. A simple, fixed-voltage boost regulator can
be implemented using the SC2603 with a minimum of
external components. The small device footprint
allows for compact circuit design.
SC2603 features include a temperature compensated
www.DatavSohleteatg4Ue.croemference, triangle wave oscillator, current limit
comparator, frequency shift over-current protection, and
an internally compensated error amplifier. Pulse by pulse
current limiting is implemented by sensing the
differential voltage across an external resistor, or an
appropriately sized PC board trace.
The SC2603 operates at a fixed frequency of 200kHz,
providing an optimum compromise between efficiency,
external component size, and cost.
Low cost / small size
Switch mode efficiency up to 95%
1% reference voltage accuracy
Over-current protection
800mA output drive
5V to 16V input power source
No need for external compensation network
SOT23-6 is fully WEEE and RoHS compliant
Applications
Portable Devices
Flat Panel TV
TV Set Top Box
Auxiliary Supplies
Peripheral Card Supplies
Industrial Power Supplies
High Density DC/DC Conversion
Typical Application Circuit
D1
L1
VIN
R1
C1
C3 D2
optional
Enable
O(oppeennDcraoilnlewctitohr)< 100
pull down impedance
C4
U2
5 VIN Gate 4
3 EN/SS CS 6
1 FB GND 2
SC2603
Q1
R4
C5
R5
VOUT
R2
C2
GND
R3
Revision: Nov 14, 2006
1
www.semtech.com

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