SC1176 - SEMTECH - Elite.Parts

Description

Semtech SC1176 Dual Synchronous Voltage-Mode Controller with Current-Sharing Circuitry

Part Number

SC1176

Price

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Manufacturer

SEMTECH

Lead Time

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Category

PRODUCTS - S

Specifications

Iout Max

Operating Frequency

300 kHz

Package

SOIC-20; TSSOP-20

Vin (V) max

Vin(V) min

4.2

Vout Min

Features

2 phases operating opposed for ripple reduction
2 phases operating opposed for ripple reduction (if same VIN used)
300 kHz fixed frequency operation
Combined current limit with fold-back
Flexible, same or separate VIN
Flexible, same or separate VIN
High-efficiency operation, >90%
Independent and separate current limit
Independent control for each channel
Industrial temperature range
Over-current protection with 50% fold-back
Phase-shifted switchers minimize ripple
Power-good output provided
Programmable current sharing
Programmable output(s) as low as .9 V
Soft start and enable function
SOIC-20 or TSSOP-20 pin Lead free package. This product is fully WEEE and RoHS compliant
Thermal distribution via multi-phase output
Two Independent PWM Controllers
Two Phase, Current Sharing Controller

Datasheet

SC1176-1296545280.pdf

776 KiB

Download

Extracted Text

SC1176/SC1176A Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry POWER MANAGEMENT Features Description The SC1176 is a versatile 2 phase, synchronous, volt- 300kHz fixed frequency operation age mode PWM controller that may be used in two dis- Soft Start and Enable function tinct ways. First, the SC1176 is ideal for applications Power Good output provided where point of use output power exceeds any single in- Over current protection with 50% fold-back put power budget. Alternatively, the SC1176 can be used Phase-shifted switchers minimize ripple as a dual switcher. The SC1176 features a temperature High efficiency operation, >90% compensated voltage reference, over current protection Programmable output(s) as low as .9V with 50% fold-back and internal level-shifted, high-side Industrial temperature range drive circuitry. SOIC-20 or TSSOP-20 pin Lead free package. This product is fully WEEE and RoHS compliant In current sharing configuration, the SC1176 can pro- duce a single output voltage from two separate voltage Two Phase, Current Sharing Controller sources (which can be different voltage levels) while Flexible, same or separate V IN maintaining current sharing between the channels. Cur- Programmable current sharing rent sharing is programmable to allow loading each input Combined current limit with fold-back supply as required by the application. 2 phases operating opposed for ripple reduction Thermal distribution via multi-phase output In dual switcher configuration, two feedback paths are provided for independent control of the separate out- Two Independent PWM Controllers puts. The device will provide a regulated output from Flexible, same or separate V IN flexibly configured inputs (3.3V, 5V, 12V), provided 5V is Independent control for each channel present for V . The two switchers are 180° out of phase CC Independent and separate current limit to minimize input and output ripple. 2 phases operating opposed for ripple reduction (if same V used) IN The SC1176A has the phases of the Master and the Slave inverted. Applications It offers a different pattern for ripple cancellation and Graphics cards prevents phase fold back during current limit. DDR Memory Peripheral add-in card The two chips are pin compatible. SSTL Termination Dual-Phase power supply Power supplies requiring two outputs Revision: June 29, 2006 1 www.semtech.com SC1176/SC1176A POWER MANAGEMENT Typical Application Circuit 2 Channels with Current Sharing www.semtech.com  2006 Semtech Corp. 2 SC1176/SC1176A POWER MANAGEMENT Absolute Maximum Rating Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Pl arameter Ss ymbo Ls imit Unit VtV o GND -V 0.3 to 15 CC IN PGND to GND ±V 1 BST to GND -V 0.3 to 26 Thermal Resistance Junction to Case SOIC 24 °C/W θ JC TSSOP 27 Thermal Resistance Junction to Ambient SOIC θ 65 °W C/ JA TSSOP 85 Oe peratingAT mbient Temperature Rang 0C to 70 ° A Oe peratingJT unction Temperature Rang 0C to 125 ° J ST torage Temperature Range -C 65 to +150 ° STG LT ead Temperature (Soldering) 10 sec 3C 00 ° LEAD Electrical Characteristics Unless Specified: V = 4.75 to 5.25V, GND = PGND = 0V, FB = V , 0mV < (CS(+) - (CS(-)) < 60mV , T = 25°C CC O J Ps arameter Cn ondition Mp i Tx y Ms a Unit (1) OI utput Voltage = 2A , Vs5 et to 2.75V 25 .6 25 .7 2V .8 O OUT SV upply Voltage 45 .2 1V CC SV upply Current =5 5.0 1A m CC RI eference Voltage =9 0µA 09 .8 01 . 0V .9 REF RV eference Voltage Line Regulation 5

Frequently asked questions

At GID Industrial (Elite.Parts' parent company), we specialize in procuring industrial parts. We know where to find the rare and obsolete equipment that our customers need in order to get back to business. There are other companies who claim to do what we do, but we're confident that our commitment to quality and value is unparalleled in our field.

Warranties differ by part and by which suppliers we use to procure it for you. Sometimes, a part will be sold as-is and without a warranty. Our specialty, single board computers, tend to receive a one-year warranty.

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What they say about us

FANTASTIC RESOURCE

One of our top priorities is maintaining our business with precision, and we are constantly looking for affiliates that can help us achieve our goal. With the aid of GID Industrial, our obsolete product management has never been more efficient. They have been a great resource to our company, and have quickly become a go-to supplier on our list!

Bucher Emhart Glass

EXCELLENT SERVICE

With our strict fundamentals and high expectations, we were surprised when we came across GID Industrial and their competitive pricing. When we approached them with our issue, they were incredibly confident in being able to provide us with a seamless solution at the best price for us. GID Industrial quickly understood our needs and provided us with excellent service, as well as fully tested product to ensure what we received would be the right fit for our company.

Fuji

HARD TO FIND A BETTER PROVIDER

Our company provides services to aid in the manufacture of technological products, such as semiconductors and flat panel displays, and often searching for distributors of obsolete product we require can waste time and money. Finding GID Industrial proved to be a great asset to our company, with cost effective solutions and superior knowledge on all of their materials, it’d be hard to find a better provider of obsolete or hard to find products.

Applied Materials

CONSISTENTLY DELIVERS QUALITY SOLUTIONS

Over the years, the equipment used in our company becomes discontinued, but they’re still of great use to us and our customers. Once these products are no longer available through the manufacturer, finding a reliable, quick supplier is a necessity, and luckily for us, GID Industrial has provided the most trustworthy, quality solutions to our obsolete component needs.

Nidec Vamco

TERRIFIC RESOURCE

This company has been a terrific help to us (I work for Trican Well Service) in sourcing the Micron Ram Memory we needed for our Siemens computers. Great service! And great pricing! I know when the product is shipping and when it will arrive, all the way through the ordering process.

Trican Well Service

GO TO SOURCE

When I can't find an obsolete part, I first call GID and they'll come up with my parts every time. Great customer service and follow up as well. Scott emails me from time to time to touch base and see if we're having trouble finding something.....which is often with our 25 yr old equipment.

ConAgra Foods