DC667A datasheet, PDF - EEWORLD Datasheet

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DC667A: Descriptionboard eval for ltc3416efe; CategoryDevelopment board/suite/development tools; File Size172KB，4 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for ltc3416efe

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC667

4A MONOLITHIC SYNCHRONOUS STEP-DOWN REGULATOR WITH TRACKING

LTC3416

DESCRIPTION

Demonstration circuit 667 is a high efficiency, high

frequency buck converter, incorporating the LTC3416

monolithic synchronous regulator. DC667 operates in

forced continuous operation and provides tracking of

another power supply rail. It operates from an input

voltage range of 2.25V to 5.5V and provides a regu-

lated output voltage from 0.8V to 5V. DC667 can de-

liver high power – up to 4A of output current - in a

relatively small circuit, thanks to 67mohm high cur-

rent power switches in the LTC3416. The LTC3416

also incorporates OPTI-LOOP compensation, so that

the DC667 can be optimized to provide fast transient

response over a wide range of line and load condi-

tions. All these features make the DC667 perfectly

suited for battery powered, hand-held applications.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Demonstration circuit DC667 is easy to set up to

evaluate the performance of the LTC3416EFE. Refer

to Figure 1 for proper measurement equipment setup

and follow the procedure below:

NOTE:

When measuring the input or output voltage

NOTE:

Make sure that the input voltage VIN does not

exceed 5.5V.

Check for the output voltages VOUT = 2.5V

ripple, care must be taken to avoid a long ground lead

on the oscilloscope probe. Measure the input or out-

put voltage ripple by touching the probe tip directly

across the VIN or VOUT and GND terminals. See Fig-

ure 2 for proper scope probe technique.

Place jumper JP1 in the ON position.

Connect Jumper JP4 for 2.5V Output Voltage.

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,

adjust the loads within 4A range and observe the

output voltage regulation, ripple voltage, efficiency

and other parameters.

To test tracking functions, place JP2 to ON posi-

Leave JP3, JP5 and JP6 unconnected.

With power off, connect the input power supply

tion, and connect TRACK terminal to 1.25V Voltage

supply (through a voltage divider, the voltage on

Track pin of the IC is about 550mV), the output

voltage will be regulated at 1.75V.

Connect TRACK terminal to GND, the VOUT should

VIN to VIN and GND.

Connect TRACK terminal to VIN (JP2 to Off posi-

be less than 200mV in normal operation.

10.

To test 1.8V output voltage, connect JP3 and leave

tion), tracking function is disabled.

Apply input power at the VIN slowly, by increasing

VIN from 0V to 5.5V.

JP4, JP5 and JP6 unconnected. Repeat the proce-

dure 3 to 7. Follow the similar procedure for other

output voltage tests.

DC667A Related Products

	DC667A	LTC3416EFE#TR	LTC3416EFE#TRPBF	LTC3416EFE#PBF
Description	board eval for ltc3416efe	IC reg buck sync adj 4A 20tssop	IC REG BUCK ADJ 4A SYNC 20TSSOP	IC REG BUCK ADJ 4A SYNC 20TSSOP
Brand Name	-	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	incompatible	conform to	conform to
Maker	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	-	TSSOP	TSSOP	TSSOP
package instruction	-	HTSSOP, TSSOP20,.25	HTSSOP, TSSOP20,.25	HTSSOP, TSSOP20,.25
Contacts	-	20	20	20
Manufacturer packaging code	-	FE	FE	FE
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	-	5.5 V	5.5 V	5.5 V
Minimum input voltage	-	2.25 V	2.25 V	2.25 V
Nominal input voltage	-	3.3 V	3.3 V	3.3 V
JESD-30 code	-	R-PDSO-G20	R-PDSO-G20	R-PDSO-G20
JESD-609 code	-	e0	e3	e3
length	-	6.5 mm	6.5 mm	6.5 mm
Humidity sensitivity level	-	1	1	1
Number of functions	-	1	1	1
Number of terminals	-	20	20	20
Maximum operating temperature	-	85 °C	85 °C	85 °C
Maximum output current	-	8 A	8 A	8 A
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	HTSSOP	HTSSOP	HTSSOP
Encapsulate equivalent code	-	TSSOP20,.25	TSSOP20,.25	TSSOP20,.25
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	235	260	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.2 mm	1.2 mm	1.2 mm
surface mount	-	YES	YES	YES
Switch configuration	-	BUCK	BUCK	BUCK
Maximum switching frequency	-	4000 kHz	4000 kHz	4000 kHz
technology	-	CMOS	CMOS	CMOS
Temperature level	-	OTHER	OTHER	OTHER
Terminal surface	-	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	GULL WING	GULL WING	GULL WING
Terminal pitch	-	0.65 mm	0.65 mm	0.65 mm
Terminal location	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	20	30	30
width	-	4.4 mm	4.4 mm	4.4 mm

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