ADM666AAN 데이터 시트보기 (PDF) - Analog Devices

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ADM666AAN

Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators

Analog Devices 

ADM663A/ADM666A

PIN FUNCTION DESCRIPTION

Mnemonic Function

VOUT(1) (2)

VIN

SENSE

GND

LBI

Voltage Regulator Output(s).

Voltage Regulator Input.

Current Limit Sense Input. (Referenced to

VOUT(2).) If not used, it should be connected to

VOUT(2).

Ground Pin. Must be connected to 0 V.

Low Battery Detect Input. Compared with 1.3 V.

LBO

SHDN

VSET

VTC

Low Battery Detect Output. Open Drain Output.

Digital Input. May be used to disable the device

so that the power consumption is minimized.

Voltage Setting Input. Connect to GND for

+5 V output, to VIN for +3.3 V output or

connect to external resistive divider for

adjustable output.

Temperature-Proportional Voltage for negative

TC Output.

PIN CONFIGURATIONS

DIP & SOIC

SENSE 1

8 VIN

VOUT2 2 ADM663A 7 VTC

VOUT1

3 TOP VIEW

(Not to Scale)

6 VSET

GND 4

5 SHDN

DIP & SOIC

TERMINOLOGY

Dropout Voltage: The input/output voltage differential at

which the regulator no longer maintains regulation against fur-

ther reductions in input voltage. It is measured when the output

decreases 100 mV from its nominal value. The nominal value is

the measured value with VIN = VOUT +2 V.

Line Regulation: The change in output voltage as a result of

a change in the input voltage. It is specified as a percentage

change in output voltage for an input voltage change.

∆VOUT (100)

Line Reg =

VOUT

∆V IN

Load Regulation: The change in output voltage for a change

in output current.

Load

Reg

(Ω) =

∆VOUT

∆IOUT

Quiescent Current: The input bias current which flows when

the regulator output is unloaded or when the regulator is in

shutdown.

Sense Input Threshold: Current limit sense voltage. This

is the voltage (referenced to VOUT(2)) at which current limiting

occurs.

Input-Output Saturation Resistance (ADM663A): This is a

measure of the internal MOS transistor effective resistance in se-

ries with VOUT1. The minimum input-output voltage differential

at low currents may be calculated by multiplying the load cur-

rent by the saturation resistance.

Thermal Limiting: This feature monitors the internal die tem-

perature and disables the output when an internal temperature

of 125°C is reached.

Maximum Power Dissipation: The maximum total device

dissipation for which the regulator will continue to operate

within specifications.

SENSE 1

8 VIN

VOUT 2 ADM666A 7 LBO

LBI

3

TOP VIEW

(Not to Scale)

6

VSET

GND 4

5 SHDN

Model

ADM663AAN

ADM663AAR

ADM666AAN

ADM666AAR

ORDERING GUIDE

Temperature

Range

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

Package

Option

N-8

R-8

N-8

R-8

REV. 0

–3–

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