Linear Technology DC660 Manuel utilisateur

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.

Autres manuels Linear Technology Carte mère

Linear Technology

Linear Technology DC299 Manuel utilisateur

Linear Technology

Linear Technology DC1732 Series Guide de configuration rapide

Linear Technology

Linear Technology DC1362A-A Guide de configuration rapide

Linear Technology

Linear Technology Analog Devices DC2564A Guide de configuration rapide

Linear Technology

Linear Technology DC1639A Manuel utilisateur

Linear Technology

Linear Technology DC1620A Guide de configuration rapide

Linear Technology

Linear Technology DC1974 Series Guide de configuration rapide

Linear Technology

Linear Technology LTC3880 Guide de configuration rapide

Linear Technology

Linear Technology DC1145B Guide de configuration rapide

Linear Technology

Linear Technology DC1697A Guide de configuration rapide

Linear Technology

Linear Technology DC1198A-A Guide de configuration rapide

Linear Technology

Linear Technology DC2166A Guide de configuration rapide

Linear Technology

Linear Technology DC2125 Guide de configuration rapide

Linear Technology

Linear Technology Demo Circuit 1592A Manuel utilisateur

Linear Technology

Linear Technology DC1369A Guide de configuration rapide

Linear Technology

Linear Technology DC1504A Guide de configuration rapide

Linear Technology

Linear Technology DC2566A Guide de configuration rapide

Linear Technology

Linear Technology DC2378A-B Manuel utilisateur

Linear Technology

Linear Technology LT3437IFE Manuel utilisateur

Linear Technology

Linear Technology DC1755A Guide de configuration rapide

Linear Technology

Linear Technology DC1986A Guide de configuration rapide

Linear Technology

Linear Technology DC2133A Guide de configuration rapide

Linear Technology

Linear Technology DC1668B-C Guide de configuration rapide

Linear Technology

Linear Technology DC1562B Guide de configuration rapide

Manuels Carte mère populaires d'autres marques

DFI

DFI SD170 Manuel utilisateur

ASROCK

ASROCK ROMED8-2T Manuel utilisateur

Asus

Asus P2L97A Manuel utilisateur

Winmate

Winmate IC70 Manuel utilisateur

Asus

Asus MES-B Manuel utilisateur

Grantech

Grantech SYS8F377VGGA-3OMN Manuel utilisateur

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuel utilisateur

Gigabyte

Gigabyte GA-9IVDT Manuel utilisateur

Texas Instruments

Texas Instruments ADS8372EVM Manuel utilisateur

Commell

Commell MS-C73 Manuel utilisateur

IBT Technologies

IBT Technologies MB860 Manuel utilisateur

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuel utilisateur

Biostar

Biostar M7VIT Bravo Instructions d'utilisation et d'installation

Intel

Intel D33217CK Manuel utilisateur

Asus

Asus F1A55-M LX PLUS R2.0 Manuel utilisateur

EPC

EPC EPC9147C Manuel utilisateur

Asus

Asus EX-B760M-V5 D4 Manuel utilisateur

EPOX

EPOX MU-8KHA0010 Manuel utilisateur