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GM7230-3.3TB5BTG Datasheet(PDF) 1 Page - Gamma Microelectronics Inc.

Part # GM7230-3.3TB5BTG
Description  150KHz, 3A STEP DOWN VOLTAGE SWITCHING REGULATORS
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Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.

GM7230-3.3TB5BTG Datasheet(HTML) 1 Page - Gamma Microelectronics Inc.

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1
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
www.gammamicro.com.tw
Application
Pre-regulator for linear regulators
High-efficiency step-down buck regulator
On-card/board switching regulators
Positive to negative converter (buck-boost)
LCD Monitors
Description
GM7230 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 3A line and load regulations. GM7230 is
available in fixed output voltages of 3.3V, 5V,
and a versatile Adjustable output version.
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 GM7230 is high-efficiency replacements for
popular three-terminal linear regulators, and is
requiring a smaller heat sink or even no need
heat sink.
GM7230 performs well with standard inductors
from most of manufacturers, and simplifying the
design of switch-mode power supplies. External
shutdown is included with 80 µA (typical) standby
current. The output switch has cycle-by-cycle
current limiting as well as thermal shutdown for
full protection under fault conditions.
GM7230 operates at a switching frequency of
150 kHz which allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM7230 series are available in a standard 5-lead
TO-220, TO220B and TO263 packages.
Features
3.3V, 5V, 12Vand Adjustable output
versions
Adjustable version output voltage range
1.23V to 37V
VOUT accuracy is to ±2% under specified
input voltage the output load conditions
Input voltage range up to 40V
Requires only 4 external components with
High efficiency
TTL shutdown capability, low power
standby mode
Built-in thermal shutdown, current limit
protection
Uses standard inductors
150 kHz fixed frequency internal oscillator
Typical Application Circuits
Unregulated
DC Input
CIN
680
μF
VIN
GM7230-5.0
Feedback
Output
L1
68
μH
5V
regulated
outpu
t,
COUT
220
μF
D1
1N5824
GND
1
4
2
3
5
ON/OFF


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