GM7130HV
3A STEP DOWN VOLTAGE SWITCHING
REGULATORS
Description
GM7130HV 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.
GM7130HV is available
in fixed output voltages
of 3.3V, 5V, 12V 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 GM7130HV is high-efficiency replacements
for popular
three-terminal linear regulators, and is
requiring a smaller heat sink or even no need
heat sink.
GM7130HV 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.
Features
3.3V, 5V, 12V and Adjustable output
versions
Adjustable version output voltage range
1.23V to 57V
V
OUT
accuracy is up to
±
2% under
specified input voltage the output load
conditions
Input voltage range up to 60V
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
52 kHz fixed frequency internal oscillator
GM7130HV operates at a switching frequency of
52 kHz which
allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM7130HV series are available in a standard 5-
lead TO-220, TO220B and TO263 packages.
Preliminary
Information
On-card/board switching regulators
Positive to negative converter (buck-boost)
Application
Pre-regulator for linear regulators
High-efficiency step-down buck regulator
Typical Application Circuits
GM7130HV-5.0
Feedback
4
1
V
IN
Output
5
C
IN
100µF
GND
3
ON/OFF
5
D1
1N5822
L1
100µH
5V
regulated
outpu
t,
C
OUT
680µF
www.gammamicro.com.tw
GM7130HV
V2.00
1
7V – 40V
Unregulated
DC Input
GAMMA [ GAMMA MICROELECTRONICS INC. ]
