G547E1P11U 查看數據表（PDF） - Unspecified

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G547E1P11U

Power Distribution Switch

Unspecified 

Global Mixed-mode Technology

G547E/F/G/H/M

Functional Description

Input and Output

IN (input) is the power supply connection to the logic

circuitry and the drain of the output MOSFET. OUT

(output) is the source of the output MOSFET. In a

typical application, current flows through the switch

from IN to OUT toward the load. Both OUT pins must

be connected together to the load.

OC Function

The OC open-drain output is asserted (active low)

when an over current or overtemperature shutdown

condition is encountered after a 9-ms deglitch timeout.

The output remains asserted until the overcurrent or

overtemperature condition is removed.

Thermal Shutdown

Applications Information

Thermal shutdown protects G547 from excessive Supply Filtering

power dissipation. If the die temperature exceeds

135°C, the MOSFETS switch is shut off. 20°C of hys-

A 1µF bypass capacitor from IN to GND, located

near the G547, is strongly recommended to control

tersis prevents the switch from turning on until the die

temperature drops to 115°C. Thermal shutdown circuit

supply transients. Without a bypass capacitor, an

output short may cause sufficient ringing on the input

functions only when the switch is enabled.

(from supply lead inductance) to damage internal

Undervoltage Lockout

control circuitry.

UVLO (undervoltage lockout) prevents the output Input transients must not exceed the absolute maxi-

MOSFET from turning on until IN (input voltage) ex-

ceeds 2.5V typically. After the switch turns on, if the

mum supply voltage (VIN max = 6V) even for a short

duration.

voltage drops below 2.3V typically, UVLO shuts off the

output MOSFET.

EN, the Enable Input

EN must be driven logic high or logic low for a clearly

Current Limiting

The typical current limit value of G547 is 3.7A, 2.5A, 2A,

技 1.5A, 1A . There is foldback of current limit when VOUT <

w四ww海.g恒of通ot科ech.com 1.5V (See Typical Performance Characteristics).

defined input. Floating the input may cause unpre-

dictable operation. EN should not be allowed to go

negative with respect to GND.

Ver:1.5

Sep 08, 2011

10

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