Linear Technology DC660 Manuale utente

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.

Altri manuali Linear Technology Scheda madre

Linear Technology

Linear Technology DC1795A Guida rapida alla configurazione

Linear Technology

Linear Technology DC2226A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1889A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1899A Manuale utente

Linear Technology

Linear Technology 2429A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1496B Guida rapida alla configurazione

Linear Technology

Linear Technology DC1760A Guida rapida alla configurazione

Linear Technology

Linear Technology DC2455A-B Guida rapida alla configurazione

Linear Technology

Linear Technology DC2367A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1705A Guida rapida alla configurazione

Linear Technology

Linear Technology DC2172A Guida rapida alla configurazione

Linear Technology

Linear Technology QuikEval DC1718A Manuale utente

Linear Technology

Linear Technology DC2001A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1759A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1238B Manuale utente

Linear Technology

Linear Technology DC1636A Guida rapida alla configurazione

Linear Technology

Linear Technology DC1626A Guida rapida alla configurazione

Linear Technology

Linear Technology DC2548A Guida rapida alla configurazione

Linear Technology

Linear Technology LTC6655 Guida rapida alla configurazione

Linear Technology

Linear Technology DC1759A Guida rapida alla configurazione

Linear Technology

Linear Technology DC250A Manuale utente

Linear Technology

Linear Technology DC1830A-A Guida rapida alla configurazione

Linear Technology

Linear Technology DC2358A Manuale utente

Linear Technology

Linear Technology 1029 Manuale utente

Manuali Scheda madre popolari di altre marche

DFI

DFI SD170 Manuale utente

ASROCK

ASROCK ROMED8-2T Manuale utente

Asus

Asus P2L97A Manuale utente

Winmate

Winmate IC70 Manuale utente

Asus

Asus MES-B Manuale utente

Grantech

Grantech SYS8F377VGGA-3OMN Manuale utente

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuale utente

Gigabyte

Gigabyte GA-9IVDT Manuale utente

Texas Instruments

Texas Instruments ADS8372EVM Manuale utente

Commell

Commell MS-C73 Manuale utente

IBT Technologies

IBT Technologies MB860 Manuale utente

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuale utente

Biostar

Biostar M7VIT Bravo Istruzioni per l'uso e l'installazione

Intel

Intel D33217CK Manuale utente

Asus

Asus F1A55-M LX PLUS R2.0 Manuale utente

EPC

EPC EPC9147C Manuale utente

Asus

Asus EX-B760M-V5 D4 Manuale utente

EPOX

EPOX MU-8KHA0010 Manuale utente