ILC7281CS-XXXX View Datasheet(PDF) - Impala Linear Corporation

Part Name

Description

Manufacturer

ILC7281CS-XXXX

Micropower Dual 150mA CMOS RF LDO™ Regulators with Power Supply Reset Monitor

Impala Linear Corporation 

Micropower Dual 150mA CMOS RF-LDO™ Regulators with Power Supply Reset Monitor

Advance

Functional Descriptin - Power Supply Reset Monitor

The following designators 1~6 refer to the timing diagram below.

1. While the input voltage (VIN) is higher than the detect fail

voltage (VDF); the VOUT output pin is at high impedence state.

2. When the input VIN voltage falls lower than VDF, VOUT

drops near to ground voltage.

3. If the input voltage decreases below the minimum oper-

ating voltage (VMIN), the VOUT output becomes unstable. In

this condition, if the VOUT pin is pulled up, VOUT indicates the

VIN voltage.

4. During an increase of the input voltage from VSS voltage,

VOUT is not stable in the voltage below the VMIN. Exceeding

that level, the output stays at the ground level (VSS)

between the minimum operating voltage (VMIN) and detect

release voltage (VDR).

5. If the input voltage increases more than VDR, the VOUT

output pin is at high impedence state.

6. The difference between VDR and VDF is the hysteresis in

the system.

Timing Diagram

INPUT VOLTAGE (VIN)

DETECT RELEASE VOLTAGE (VDR)

6

DETECT FAIL VOLTAGE (VDF)

MINIMUM OPERATING VOLTAGE (VMIN)

GROUND VOLTAGE (VSS)

OUTPUT VOLTAGE (VOUT)

1

2

GROUND VOLTAGE (VSS)

3

4

5

Impala Linear Corporation

ILC7281 1.0

(408) 574-3939 www.impalalinear.com

Nov 2000 8

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