LTC1628CUH#PBF datasheet, PDF - EEWORLD Datasheet

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LTC1628CUH#PBF: DescriptionIC REG CTRLR BUCK 32QFN; CategoryPower/power management The power supply circuit; File Size519KB，3 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC1628CUH#PBF Overview

IC REG CTRLR BUCK 32QFN

LTC1628CUH#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	QFN
package instruction	HVQCCN, LCC32,.2SQ,20
Contacts	32
Manufacturer packaging code	UH
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	36 V
Minimum input voltage	3.5 V
Nominal input voltage	15 V
JESD-30 code	S-PQCC-N32
JESD-609 code	e3
length	5 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	32
Maximum operating temperature	85 °C
Minimum operating temperature
Maximum output current	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	HVQCCN
Encapsulate equivalent code	LCC32,.2SQ,20
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	0.8 mm
surface mount	YES
Switch configuration	PHASE-SHIFT
Maximum switching frequency	360 kHz
technology	CMOS
Temperature level	OTHER
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	30
width	5 mm

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 392

HIGH EFFICIENCY DUAL REGULATOR

LTC1628 or LTC3728

DESCRIPTION

Demonstration circuit 392 is a dual output, step-down,

synchronous buck converter featuring either the 150kHz

to 300kHz LTC1628EUH controller (DC392A-A), the

250kHz to 550kHz LTC3728EUH (DC392A-B) or 250kHz

to 550kHz LTC3728LUH (DC392A-C). All three ICs come

in a 5mm×5mm QFN package with an exposed pad for

Table 1. Performance Summary

PARAMETER

Minimum Input Voltage

Maximum Input Voltage

OUT1

OUT2

Switching Frequency (LTC1628)

Switching Frequency (LTC3728)

= 7V to 24V, I

OUT1

= 0A to 4A

= 7V to 24V, I

OUT1

= 0A to 5A

Jumper selectable

CONDITION

VALUE

24V

5V ±1%

3.3V ±1%

150kHz–300kHz

250kHz–550kHz

low thermal impedance. The input voltage is from 7V up

to 24V. Output 1 is 5V with loads up to 4A and output 2

is 3.3V with loads up to 5A.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Demonstration circuit 392 is easy to set up to evaluate

the performance of the LTC1628 or LTC3728. Refer to

Figure 1 for proper measurement equipment setup and

follow the procedure below:

NOTE:

The input voltage range should be 7V–24V in-

Set Vin to 12V (recommended). The rated input

voltage range is from 7V to 24V.

Remove the RUN1 jumper to switch on the Vout1

channel. The nominal output voltage of Vout1

should be 5V ±0.1V.

Increase load current on Vout1 to 4A. At 12V input

voltage, the input current should be less than 2A.

Slowly increase the input voltage to 24V. At 24V in-

put, the input current should be less than 1.1A.

Decrease the load current of Vout1 to 0A. Reduce

stead of 5V-24V as shown on the board.

NOTE:

When measuring the input or output voltage rip-

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.

With the power off, place the jumpers as shown in

the input voltage to 12V.

Remove the RUN2 jumper to switch on the Vout2

Figure 1.

NOTE:

The STBY and FLTCPL jumpers apply only to

channel. The output voltage of Vout2 should be

3.3V ±0.05V.

Increase load current on Vout2 to 5A. At 12V input

demo circuit 392A-A (featuring the LTC1628). These

jumpers are not used for the DC392A-B or

DC392A-C which feature the LTC3728.

Connect the loads at Vout1 and Vout2. The loads

voltage, the input current should be less than 1.8A.

Slowly increase the input voltage to 24V. At 24V in-

put, the input current should be less than 1.0A.

can be up to 4A for Vout1 and 5A for Vout2. Pre-set

the loads to 0A.

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