DC560A datasheet, PDF - EEWORLD Datasheet

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DC560A: Descriptionboard eval for ltc3403edd; CategoryDevelopment board/suite/development tools; File Size467KB，3 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for ltc3403edd

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 560

WCDMA CELLULAR PHONE BUCK REGULATOR

LTC3403EDD

DESCRIPTION

Demonstration circuit 560 is a constant-frequency step-

down converter, using the LTC3403 monolithic synchro-

nous buck regulator. It is specifically designed for

WCDMA power amplifier applications. The output volt-

age can be dynamically controlled from 0.3V to 3.5V. A

0.2Ω internal bypass P-channel MOSFET connects the

OUT

to V

reducing the power loss through the buck

regulator. DC560 is capable of delivering up to 600mA of

output current for an input voltage range of 2.7V to 5V.

The efficiency of the DC560 is very high: up to 96%. In

Burst Mode

operation, the DC supply current is typi-

cally only 20µA at no load, and less than 1µA in shut-

down.

The LTC3403 comes in a small 8-Pin DFN package and

has an operating frequency of 1.5MHz (allowing the ex-

clusive use of low profile surface mount components).

These and other features make demonstration circuit

560 ideal for single-cell Li-ion-powered hand-held appli-

cations.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Demonstration circuit 560 is easy to set up to evaluate

the performance of the LTC3403EDD. Refer to Figure 1

for proper measurement equipment setup and follow the

procedure below:

NOTE:

When measuring the input or output voltage rip-

Turn on the V

REF

power supply.

NOTE:

Make sure that the input voltage V

REF

does not

exceed V

For VREF < 1.2V, check for the output voltages

ple, care must be taken to avoid a long ground lead on

the oscilloscope probe. Measure the input or output

voltage ripple by touching the probe tip directly across

the Vin or Vout and GND terminals. See Figure 2 for

proper scope probe technique.

Place jumper JP2 in the FC position, JP1 in the ON

OUT

= 3 • V

REF

For V

REF

> 1.2V, VOUT is directly connected to VIN.

OUT

= V

If there is no output, temporarily disconnect the load

to make sure that the load is not set too high.

Once the proper output voltages are established, ad-

position.

With power off, connect the input power supply V

VIN and GND.

Connect input power supply V

REF

to REF and GND.

Turn on the power at VIN.

NOTE:

Make sure that the input voltage at VIN does not

just the loads within 600mA range and observe the

output voltage regulation, ripple voltage, efficiency

and other parameters.

To test Burst Mode

operation, set JP2 in the Burst

position and JP1 in the ON position, and repeat steps

2 to 7.

exceed 5V.

DC560A Related Products

	DC560A	LTC3403EDD#TR	LTC3403EDD#TRPBF	LTC3403EDD#PBF
Description	board eval for ltc3403edd	IC reg buck sync adj 0.6A 8dfn	IC REG BUCK ADJ 0.6A SYNC 8DFN	IC REG BUCK ADJ 0.6A SYNC 8DFN
Brand Name	-	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	incompatible	conform to	conform to
Parts packaging code	-	DFN	DFN	DFN
package instruction	-	VSON,	VSON,	VSON, SOLCC8,.11,20
Contacts	-	8	8	8
Manufacturer packaging code	-	DD	DD	DD
Reach Compliance Code	-	_compli	compliant	compliant
ECCN code	-	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Maximum input voltage	-	5 V	5 V	5 V
Minimum input voltage	-	2.5 V	2.5 V	2.5 V
Nominal input voltage	-	3.6 V	3.6 V	3.6 V
JESD-30 code	-	S-PDSO-N8	S-PDSO-N8	S-PDSO-N8
JESD-609 code	-	e0	e3	e3
length	-	3 mm	3 mm	3 mm
Humidity sensitivity level	-	1	1	1
Number of functions	-	1	1	1
Number of terminals	-	8	8	8
Maximum operating temperature	-	70 °C	70 °C	70 °C
Maximum output current	-	1.3 A	1.3 A	1.3 A
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	VSON	VSON	VSON
Package shape	-	SQUARE	SQUARE	SQUARE
Package form	-	SMALL OUTLINE, VERY THIN PROFILE	SMALL OUTLINE, VERY THIN PROFILE	SMALL OUTLINE, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	-	235	250	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	0.85 mm	0.85 mm	0.85 mm
surface mount	-	YES	YES	YES
Switch configuration	-	BUCK	BUCK	BUCK
Maximum switching frequency	-	1800 kHz	1800 kHz	1800 kHz
Temperature level	-	COMMERCIAL	COMMERCIAL	COMMERCIAL
Terminal surface	-	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	NO LEAD	NO LEAD	NO LEAD
Terminal pitch	-	0.5 mm	0.5 mm	0.5 mm
Terminal location	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	20	NOT SPECIFIED	30
width	-	3 mm	3 mm	3 mm

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