TC1306_07 Datasheet, PDF(4/18 Page) Microchip Technology – Dual 150mA CMOS LDO With Select Mode™ Operation, Shutdown and RESET Output

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TC1306_07 Datasheet, PDF (4/18 Pages) Microchip Technology – Dual 150mA CMOS LDO With Select Mode™ Operation, Shutdown and RESET Output

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TC1306

2.0 PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1: PIN FUNCTION TABLE

Pin No.

(8-Pin MSOP)

Symbol

VIN

GND

SELECT

SHDN1

SHDN2

VOUT1

VOUT2

RESET

Description

Power supply input.

Ground terminal.

SELECT control for setting VOUT2. SELECT = Low for VOUT2 = 2.8V, SELECT = High for

VOUT2 = 3.0V.

Shutdown control input for VOUT1. Regulator 1 is fully enabled when a logic high is applied to

this input. Regulator 1 enters shutdown when a logic low is applied to this input. During

shutdown, regulator output voltage falls to zero, RESET output remains valid.

Shutdown control input for VOUT2. Regulator 2 is fully enabled when a logic high is applied to

this input. Regulator 2 enters shutdown when a logic low is applied to this input. During

shutdown, regulator output voltage falls to zero, RESET output is low.

Regulated voltage output 1.

Regulated voltage output 2.

RESET Output. RESET = Low when VOUT2 is below the Reset Threshold Voltage.

RESET = High when VOUT2 is above the Reset Threshold Voltage.

3.0 DETAILED DESCRIPTION

The TC1306 is a precision fixed output voltage

regulator that contains two fully independent 150mA

outputs. The device also features separate shutdown

modes for low-power operation. The Select Modeâ¢

operation allows the user to select VOUT2 from two

different values (2.8V, 3.0V), therefore providing high

design flexibility. VOUT1 supplies a fixed 1.8V output

voltage. The CMOS construction of the TC1306 results

in a very low supply current, which does not increase

with load changes. In addition, VOUT remains stable

and within regulation at no load currents.

The TC1306 also features an integrated microproces-

sor supervisor that monitors the VOUT2 output. The

active low RESET signal is asserted when the voltage

of VOUT2 falls below the reset voltage threshold

(2.63V). The RESET output remains low for 300msec

(typical) after VOUT2 rises above the reset threshold.

The RESET output of the TC1306 is optimized to reject

fast transient glitches on the monitored output line.

DS21527C-page 4

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