GM7109HV Datasheet, PDF (1/9 Pages) Gamma Microelectronics Inc. – Standard ESOP8 package is available

GM7109HV
150KHz, 60V/3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Description
Features
GM7109HV 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.
GM7109HV 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 GM7109HV is high-efficiency replacements
for popular three-terminal linear regulators, and is 
requiring a smaller heat sink or even no need
heat sink.

GM7109HV 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.
Standard ESOP8 package is available
3.3V, 5V, 12Vand Adjustable output
versions
Adjustable version output voltage range
1.23V to 57V
V_OUT accuracy is 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
150 kHz fixed frequency internal oscillator
GM7109HV operates at a switching frequency of
150 kHz which allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM7109HV series are available in a standard 8
lead SO package with heat sink
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
Typical Application Circuits
Unregulated
DC Input
CIN
470μF
GM7109HV-5.0
1 V_IN
Feedback ³
Output 2
ON/OFF
4
GND
5, 6, 7, 8
L1
68μH
D1
1N5824
5V
regulated
output,
COUT
470μF
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