GM2576 Datasheet, PDF (1/9 Pages) Gamma Microelectronics Inc. – 2A STEP DOWN VOLTAGE SWITCHING REGULATORS

GM2576
2A STEP DOWN VOLTAGE SWITCHING
REGULATORS
Description
Features
GM2576 series is designed to provide all the
‹
active function for a step-down (buck) switching
regulator, and drives a maximum load current as
high as 2A line and load regulations. GM2576 is
‹
available in fixed output voltages of 3.3V, 5V,
‹
and a versatile Adjustable output version.
Standard SOP8 & PSOP8 and 5L TO252
packages are available
3.3V, 5V, and Adjustable output versions
Adjustable version output voltage range
1.23V to 37V
These regulators are simple to use and require ‹
minimum number of external components. The
features include internal frequency compensation
and a fixed-frequency oscillator.
‹
The GM2576 is high-efficiency replacements for ^‹
popular three-terminal linear regulators, and is
requiring a smaller heat sink or even no need
‹
heat sink.
V_OUT accuracy is to ±1.8% under specified
input voltage and output load conditions
Input voltage range up to 40V
Requires only 4 external components with
High efficiency
TTL shutdown capability, low power
standby mode
GM2576 performs well with standard inductors _{‹ Built-in thermal shutdown, current limit}
from most of manufacturers, and simplifying the
protection
design of switch-mode power supplies. External
shutdown is included with 80 µA (typical) standby
‹
Uses standard inductors
current. The output switch has cycle-by-cycle
‹ 52 kHz fixed frequency internal oscillator
current limiting as well as thermal shutdown for
full protection under fault conditions.
GM2576 operates at a switching frequency of
52 kHz which allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM2576 series are available in a standard 8-lead
SO package, 8 lead SO package with heat sink
or 5L TO252 package.
Application
Pre-regulator for linear regulators
High-efficiency step-down buck regulator
On-card/board switching regulators
Positive to negative converter (buck-boost)
Typical Application Circuits
7V – 40V
Unregulated
DC Input
C_IN
100µF
GM2576-5.0
V_IN
SD
FB
Output
GND
L1
100µH
5V
regulated
output,
D1
1N5822
C_OUT
680µF
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