Linear Technology DC660 Bedienungsanleitung

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 660

LOW NOISE MICROPOWER LINEAR VOLTAGE REGULATOR

LTC1844

DESCRIPTION

Demonstration circuit DC660 is a low noise micro-

power voltage regulator using the LTC1844 ultra-low

dropout CMOS linear regulator, which comes in a tiny

5-Pin SOT-23 package. The DC660 has an input volt-

age range from 1.8V to 6.5V, and is capable of deliv-

ering 150 mA max. The DC660 is able to use ceramic

capacitors, due to the LTC1844 capability of maintain-

ing stability with ultra-low ESR capacitors. With the

small size ceramic capacitors, tiny SOT-23 package of

the LTC1844, plus its low quiescent current –

maximum 80uA over temperature, the DC660 voltage

regulator is ideally suited for hand-held applications,

such as cellular phones or PDAs.

Gerber files for this circuit are available. Call the

LTC Factory.

QUICK START PROCEDURE

DC660 is easy to set up for evaluating the perform-

ance of the LTC1844. For proper measurement

equipment configuration, set up the circuit accord-

ing to the diagram in Figure 1.

Please follow the procedure outlined below for

proper operation.

1. Before proceeding to test, insert jumper JP1

into the 1.5V option and apply no load

across Vout.

2. Apply 1.6V across Vin (to Gnd). Draw

10mA of load current. Measure Vout; it

should be 1.5V +/- 2% (1.47V to 1.53V).

3. Vary the input voltage from 1.6V to 6.5V

and the load current from 10 mA to 100 mA.

Vout should measure 1.5V +/- 4% (1.44V to

1.56V).

4. Turn off the input power and move jumper

JP1 into any of the remaining output voltage

options: 1.8V, 2.5V, 2.8V, or 3.3V. Re-apply

power, and, just as in the 1.5V test, the out-

put voltage should read Vout +/- 2% toler-

ance under static line and load conditions,

and +/- 4% tolerance under dynamic line

and load conditions.

5. When finished evaluating, turn off the input

power.

Warning - If long leads are used to power the demo

circuit, the input voltage at the part could “ring”.

This ringing could affect the operation of the circuit

or even exceed the maximum voltage rating of the

IC. To eliminate this, insert a small tantalum ca-

pacitor (for instance, an AVX part #

TAJW226M010R) on the pads between the input

power and return terminals on the bottom of the

demo board. The (greater) ESR of the tantalum will

dampen the (possible) ringing voltage due to the

use of long input leads. On a normal, typical PCB,

with short traces, the capacitor is not needed.

Downloaded from Arrow.com.

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 660

LOW NOISE MICROPOWER LINEAR VOLTAGE REGULATOR

Figure 1. Proper Measurement Equipment Setup

Figure 2. Measuring Input or Output Ripple

Downloaded from Arrow.com.Downloaded from Arrow.com.

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 660

LOW NOISE MICROPOWER LINEAR VOLTAGE REGULATOR

Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

Andere Linear Technology Hauptplatine Handbücher

Linear Technology

Linear Technology DC1555A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1954A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1257B Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology LTC3554EPD Bedienungsanleitung

Linear Technology

Linear Technology DC1496C Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1925A Series Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1367A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology 749 Bedienungsanleitung

Linear Technology

Linear Technology Analog Devices DC1890A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1339 Bedienungsanleitung

Linear Technology

Linear Technology DC1540B Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1525A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC2358A Bedienungsanleitung

Linear Technology

Linear Technology DC1552A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1784A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC2423A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1842A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology LTC2270 Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1587 Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1444A Bedienungsanleitung

Linear Technology

Linear Technology DC2257A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC2367A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC2194A Kurzanleitung zur Einrichtung

Linear Technology

Linear Technology DC1842B Bedienungsanleitung

Beliebte Hauptplatine Handbücher anderer Marken

DFI

DFI SD170 Bedienungsanleitung

ASROCK

ASROCK ROMED8-2T Bedienungsanleitung

Asus

Asus P2L97A Bedienungsanleitung

Winmate

Winmate IC70 Bedienungsanleitung

Asus

Asus MES-B Bedienungsanleitung

Grantech

Grantech SYS8F377VGGA-3OMN Bedienungsanleitung

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Bedienungsanleitung

Gigabyte

Gigabyte GA-9IVDT Bedienungsanleitung

Texas Instruments

Texas Instruments ADS8372EVM Bedienungsanleitung

Commell

Commell MS-C73 Bedienungsanleitung

IBT Technologies

IBT Technologies MB860 Bedienungsanleitung

Nvidia

Nvidia TEGRA DG-04927-001_V01 Bedienungsanleitung

Biostar

Biostar M7VIT Bravo Bedienungs- und Montageanleitung

Intel

Intel D33217CK Bedienungsanleitung

Asus

Asus F1A55-M LX PLUS R2.0 Bedienungsanleitung

EPC

EPC EPC9147C Bedienungsanleitung

Asus

Asus EX-B760M-V5 D4 Bedienungsanleitung

EPOX

EPOX MU-8KHA0010 Bedienungsanleitung