LT3757HMSE#PBF datasheet, PDF - EEWORLD Datasheet

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LT3757HMSE#PBF: DescriptionIC REG CTRLR MULT TOP 10MSOP; CategoryPower/power management The power supply circuit; File Size887KB，3 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LT3757HMSE#PBF Overview

IC REG CTRLR MULT TOP 10MSOP

LT3757HMSE#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	MSOP
package instruction	HTSSOP, TSSOP10,.19,20
Contacts	10
Manufacturer packaging code	MSE
Reach Compliance Code	compliant
ECCN code	EAR99
Samacsys Description	LINEAR TECHNOLOGY - LT3757HMSE#PBF - DC-DC CONTROLLER, SEPIC, 1MHZ, 10MSOP
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	40 V
Minimum input voltage	2.9 V
Nominal input voltage	24 V
JESD-30 code	S-PDSO-G10
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	10
Maximum operating temperature	150 °C
Minimum operating temperature	-40 °C
Nominal output voltage	7.2 V
Package body material	PLASTIC/EPOXY
encapsulated code	HTSSOP
Encapsulate equivalent code	TSSOP10,.19,20
Package shape	SQUARE
Package form	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.1 mm
surface mount	YES
Switch configuration	BOOST
Maximum switching frequency	1000 kHz
technology	BIPOLAR
Temperature level	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3 mm

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LT3757

DEMO CIRCUIT 1341A

QUICK START GUIDE

LT3757EDD

HIGH EFFICIENCY SEPIC CONVERTER

DESCRIPTION

Demonstration circuit 1341A features LT3757EDD in a

300kHz SEPIC converter circuit, designed for 5V out-

put from a 4.5V to 36V input.

The LT3757EDD operates over an input range of 2.9V

to 40V, suitable for applications from single-cell lith-

ium-ion battery portable electronics up to high voltage

automotive and industrial power supplies. It also ex-

hibits low shutdown quiescent current of 1µA, making

them an ideal fit for battery-operated systems. The IC

integrates a high voltage, low dropout linear (LDO)

regulator. Thanks to a novel FBX pin architecture, the

LT3757EDD can be connected directly to a divider

from either the positive output or the negative output

to ground. They also pack many popular features such

as soft-start, input undervoltage lockout, adjustable

frequency and synchronization in a small 10-lead

MSOP package or a 3mm × 3mm QFN package.

The LT3757EDD datasheet gives a complete descrip-

tion of the part, operation and application information.

The datasheet must be read in conjunction with this

quick start guide for demo circuit 1341A.

Design files for this circuit board are available. Call

the LTC factory.

, LTC and LT are registered trademarks of Linear

Technology Corporation.

Table 1. Performance Summary for 300kHz SEPIC Regulator ( TA = 25 C )

PARAMETER

CONDITION

Minimum Input Voltage

Maximum Input Voltage

Output Voltage V

OUT

Maximum Output Current

Typical Switching Frequency

VALUE

4.5V

36V

5V +/-3%

300kHz

QUICK START PROCEDURE

Demonstration circuit 1341A is easy to set up to

evaluate the performance of the LT3757EDD. Refer

to Figure 1 for proper measurement equipment

setup and follow the procedure below:

measuring the input or output voltage

ripple, 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.

NOTE.

When

Turn on the power at the input.

sure that the input voltage does not

exceed the maximum input voltage.

NOTE.

Make

Check for the proper output voltages.

there is no output, temporarily disconnect

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

high.

NOTE.

Place JP1 on the RUN position.

With power off, connect the input power supply

to Vin and GND.

Once the proper output voltages are established,

adjust the loads within the operating range and ob-

serve the output voltage regulation, ripple voltage,

efficiency and other parameters.

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