SC2618 Datasheet, PDF (1/9 Pages) Semtech Corporation – Miniature PWM Controller for Buck Regulator

POWER MANAGEMENT
Description
The SC2618 is a hysteretic mode PWM controller de-
signed for high efficiency, low cost “Point of Load” appli-
cations.
The hysteretic control scheme allows the use of ceramic
output capacitors without the need for compensation
components and difficult calculations.
An internal soft start prevents output voltage from start
up overshoot. A “Hiccup” short circuit protection provides
protection against output short circuits as well as ad-
verse input supply sequencing.
SC2618
Miniature PWM Controller
for Buck Regulator
Features
‹ Operating Frequency up to 500kHz
‹ Input supply from 5V to 12V
‹ 0.5A gate drive capability
‹ Internal soft start
‹ Internal, trimmed bandgap reference (±1%)
‹ Hiccup mode short circuit protection
‹ Input supply sequence protection
‹ 6 lead SOT23 package
Applications
‹ Graphics IC Power supplies
‹ Embedded, low cost, high efficiency converters
Typical Application Circuit
VIN
BOOST
VCC
GND
Q1
5 _{BST DH} 6
Q2
3 _{VCC DL} 1
2 _{GND FB} 4
SC2618
VO
GND
Revision: September 19, 2005
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