DC385A datasheet, PDF - EEWORLD Datasheet

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DC385A: Descriptionboard eval for ltc1778egn; CategoryDevelopment board/suite/development tools; File Size108KB，2 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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DC385A Overview

board eval for ltc1778egn

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DC385 Introduction

Description

Demonstration circuit DC385 is a high density synchronous step-down (buck) regulator

using the LTC



1778 No R

SENSE

™ switching regulator controller. This controller uses a

valley current control architecture to deliver very low duty cycles without requiring a

sense resistor. It provides high efficiency operation at light loads by means of

discontinuous mode operation. Noise and RF interference are reduced by means of a

forced continuous control pin. The circuit uses a dual SyncFET™ and has a very small

footprint. With a wide operating range of V

from 5V to 28V and a duty cycle of 2% to

90% at 200kHz, the circuit demonstrates that the LTC1778 is ideal for applications such

as notebook and palmtop computers, PDAs, battery chargers and distributed power

systems.

Quick Start Guide

This demonstration board is easily set up to evaluate the performance of the LTC1778.

Please follow the procedure outlined below for proper operation.

Connect input power to the V

and GND terminals. Input voltage is limited to

between 5V to 28V. Refer to Figure 1 for proper measurement equipment setup.

2. Connect the load between the V

OUT

and GND terminals.

–

VIN

GND

LTC1778EGN

GND

–

LOAD

SGND

VOUT

IMVPII I/O POWER SUPPLY

DC385A

–

Figure 1. DC385 Test and Measurement Setup

DC385A Related Products

	DC385A	LTC1778EGN-1#PBF	LTC1778EGN#PBF	LTC1778EGN#TRPBF	LTC1778IGN#TRPBF	LTC1778EGN-1#TRPBF	LTC1778IGN#PBF
Description	board eval for ltc1778egn	IC reg ctrlr buck pwm CM 16-ssop	IC REG CTRLR BUCK/BCK-BST 16SSOP	IC REG CTRLR BUCK/BCK-BST 16SSOP	IC REG CTRLR BUCK/BCK-BST 16SSOP	IC REG CTRLR BUCK/BCK-BST 16SSOP	IC REG CTRLR BUCK/BCK-BST 16SSOP
Brand Name	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	conform to	conform to	conform to	conform to	conform to	conform to
Parts packaging code	-	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
package instruction	-	SSOP, SSOP16,.25	SSOP, SSOP16,.25	SSOP, SSOP16,.25	SSOP, SSOP16,.25	SSOP, SSOP16,.25	SSOP, SSOP16,.25
Contacts	-	16	16	16	16	16	16
Manufacturer packaging code	-	GN	GN	GN	GN	GN	GN
Reach Compliance Code	-	compli	compliant	compliant	compliant	compliant	compliant
ECCN code	-	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Maximum input voltage	-	36 V	36 V	36 V	36 V	36 V	36 V
Minimum input voltage	-	4 V	4 V	4 V	4 V	4 V	4 V
Nominal input voltage	-	15 V	15 V	15 V	15 V	15 V	15 V
JESD-30 code	-	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16
JESD-609 code	-	e3	e3	e3	e3	e3	e3
length	-	4.8895 mm	4.8895 mm	4.8895 mm	4.8895 mm	4.8895 mm	4.8895 mm
Humidity sensitivity level	-	1	1	1	1	1	1
Number of functions	-	1	1	1	1	1	1
Number of terminals	-	16	16	16	16	16	16
Maximum operating temperature	-	70 °C	70 °C	70 °C	125 °C	70 °C	125 °C
Maximum output current	-	2 A	2 A	2 A	2 A	2 A	2 A
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
Encapsulate equivalent code	-	SSOP16,.25	SSOP16,.25	SSOP16,.25	SSOP16,.25	SSOP16,.25	SSOP16,.25
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	260	260	250	250	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.75 mm	1.75 mm	1.75 mm	1.75 mm	1.75 mm	1.75 mm
surface mount	-	YES	YES	YES	YES	YES	YES
Switch configuration	-	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL
technology	-	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	COMMERCIAL	COMMERCIAL	COMMERCIAL	AUTOMOTIVE	COMMERCIAL	AUTOMOTIVE
Terminal surface	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	-	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm	0.635 mm
Terminal location	-	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	30	30	NOT SPECIFIED	NOT SPECIFIED	30
width	-	3.899 mm	3.899 mm	3.899 mm	3.899 mm	3.899 mm	3.899 mm
Base Number Matches	-	1	1	1	1	1	1

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