GM7110 Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – 1A STEP-DOWN VOLTAGE SWITCHING REGULATOR

AA
MICROELECTRONICS
Power Management
GM7110
1A STEP-DOWN VOLTAGE SWITCHING REGULATOR
Description
GM7110 of regulators provides all the active functions for a step-
down (buck) switching regulator, and drives 1A load with excellent
line and load regulation. GM7110 is available in fixed output volt-
ages of 3.3V, 5V, 12V, 15V, and a versatile Adjustable output ver-
sion. These regulators are simple to use and require a minimum
number of external components.
Features include internal frequency compensation and a fixed-
frequency oscillator. GM7110 high-efficiency replacement for popu-
lar three-terminal linear regulators, and is requiring a smaller heat
sink or even no heat sink. GM7110 performs well with standard
inductors from several manufacturers, and simplifying the design
of switch-mode power supplies. GM7110 guarantees ±4% toler-
ance on output voltage within specified input voltages and output
load conditions, and ±10% on the oscillator frequency. External
shutdown is included with 50 µA (typical) standby current. The
output switch has cycle-by-cycle current limiting as well as ther-
mal shutdown for full protection under fault conditions.
Features
3.3V, 5V, 12V, 15V and Adjustable output versions
Adjustable version output voltage range 1.23V
to 37V ±4% max over line and load conditions
1A output current
Requires Only 4 External Components
High Efficiency
TTL shutdown capability and low power standby
mode
Thermal shutdown, current limit protection
Uses standard inductors
52 kHz fixed frequency internal oscillator
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
Feedback
7V - 40V
Unregulated
DC Input
+V_IN
4
1 ^GM7110-5.0 _Output
C_{IN +}
2
100 µF
3 GND _{ON / OFF 5}
L1
330 µH ⁺
D1
1N5819
C_OUT
330 µF
5.0V, 1A
Regulated
Output
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PRELIMINARY