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GM7110-3.3TA5R Datasheet

  • GM7110-3.3TA5R

  • 1A STEP-DOWN VOLTAGE SWITCHING REGULATOR

  • 297.98KB

  • 11頁

  • ETC

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MICROELECTRONICS
A
A
Power Management
GM7110
1A STEP-DOWN VOLTAGE SWITCHING REGULATOR
Features
3.3V, 5V, 12V, 15V and Adjustable output versions
Adjustable version output voltage range 1.23V
to 37V 鹵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
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 鹵4% toler-
ance on output voltage within specified input voltages and output
load conditions, and 鹵10% on the oscillator frequency. External
shutdown is included with 50 碌A(chǔ) (typical) standby current. The
output switch has cycle-by-cycle current limiting as well as ther-
mal shutdown for full protection under fault conditions.
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
7V - 40V
Unregulated
DC Input
100 碌F
+V
IN
1
C
IN
+
Feedback
4
GM7110-5.0
3 GND ON / OFF 5
Output
2
L1
330 碌H
D1
1N5819
+
C
OUT
330 碌F
5.0V, 1A
Regulated
Output
www.gammamicro.com
PRELIMINARY
GM7110
V0.1
1
GM 431

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