HT7465_14 Datasheet, PDF (1/9 Pages) Holtek Semiconductor Inc – Step-Down DC to DC Converter

HT7465
Step-Down DC to DC Converter
Feature
• Input voltage range: 4.75V to 24V
• Variable output voltage range: 0.92V to 20V
• 2A output current
• Efficiency up to 92%
• Fixed 380kHz operating frequency
• 20mA shutdown current
• Internal power MOSFET switch
• Stable operation using low ESR ceramic capacitors
• Over temperature protection
• Cycle-by-cycle over current protection
• Under voltage lockout protection
• 8-pin SOP package
Applications
• Battery chargers
• Distributed power systems
• LED driver
• DSL modems
• Linear regulator pre power processing
• Set-Top-Boxes, DVD players, LCD displays
General Description
The HT7465 is a 2A high efficiency step-down DC-
DC converter which includes a fully integrated MOS
power transistor. The device uses a current-mode
control operating methodology and can operate over a
wide input voltage range of 4.75V to 24V for which it
can provide a stable adjustable output voltage.
The device includes over temperature protection,
over current protection and under voltage lockout
protection, features which combine to prevent device
damage due to overload conditions. In its shutdown
mode the regulator draws a mere 20uA of supply
current.
The device is available in 8-pin SOP package type
and provides a very compact system solution with a
minimum of external components.
Application Circuits
VIN
4.75~24V
10 F
C1
10nF
C2
VIN
BS
EN
SW
HT7465
GND
FB
COMP
V_OUT

V_FB


R₁  R
R₂
2

Efficiency vs Output Current
B230A
L
10/15 H
R1
VOUT

R3
C5
C4
R2
22uF
C6
Rev. 1.10
1
April 18, 2014