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MAX8576, MAX8577, MAX8578, MAX8579

3V to 28V Input, Low-Cost, Hysteretic Synchronous Step-Down Controllers
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Status Explanations for product status codes

Active: In Production.

Description

  Notify me when the EE-Sim online simulation tool supports:  [MAX8576]

The MAX8576–MAX8579 synchronous PWM buck controllers use a hysteretic voltage-mode control algorithm to achieve a fast transient response without requiring loop compensation. The MAX8576/MAX8577 contain an internal LDO regulator allowing the controllers to function from only one 3V to 28V input supply. The MAX8578/MAX8579 do not contain the internal LDO and require a separate supply to power the IC when the input supply is higher than 5.5V. The MAX8576–MAX8579 output voltages are adjustable from 0.6V to 0.9 x VIN at loads up to 15A.

Nominal switching frequency is programmable over the 200kHz to 500kHz range. High-side MOSFET sensing is used for adjustable hiccup current-limit and short-circuit protection. The MAX8576/MAX8578 can start up into a precharged output without pulling the output voltage down. The MAX8577/MAX8579 have startup output overvoltage protection (OVP), and will pull down a precharged output.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 1 (PDF, 404kB)
Send this datasheet to any email addressE-Mail
An evaluation kit is available: MAX8576EVKIT

Key Features

  • 3V to 28V Supply Voltage Range
  • 1.2% Accurate Over Temperature
  • Adjustable Output Voltage Down to 0.6V
  • 200kHz to 500kHz Switching Frequency
  • Adjustable Temperature-Compensated Hiccup Current Limit
  • Lossless Peak Current Sensing
  • Monotonic Startup into Prebias Output (MAX8576/MAX8578)
  • Startup Overvoltage Protection (MAX8577/MAX8579)
  • Enable/Shutdown
  • Adjustable Soft-Start
 

Applications/Uses

  • AGP and PCI Express® Power Supplies
  • Graphic-Card Power Supplies
  • Motherboard Power Supplies
  • Point-of-Load Power Supplies
  • Set-Top Boxes
   

Key Specifications:

Step-Down Switching Regulators
Part Number VIN
(V)		 VIN
(V)		 VOUT
(V)		 VOUT
(V)		 Max. IOUT
(A)		 Max. IOUT
(A)		 Output Adjust. Method DC-DC Outputs Oper. Freq.
(kHz)		 Package/Pins Smallest Available Pckg.
(mm2)		 Budgetary Price
min max min max ≥ ≤ max w/pins See Notes
MAX8576  3 28 0.6 25 15 15 Resistor 1 500
µMAX/10
 15.4 $1.12 @1k
MAX8577 
µMAX/10
 $1.12 @1k
MAX8578 
µMAX/10
 $1.12 @1k
MAX8579 
µMAX/10
 $1.12 @1k
See All Step-Down Switching Regulators (284)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX8576, MAX8577, MAX8578, MAX8579: Functional Diagram
Functional Diagram

Reliability Reports

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Software/Models

  Notify me when the EE-Sim online simulation tool supports:  [MAX8576]

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX8576EUB    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX8576EUB+  
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8576EUB+T    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8576EUB-T    
Active uMAX;10 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX8577EUB    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX8577EUB+    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8577EUB+T    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8577EUB-T    
Active uMAX;10 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX8578EUB    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX8578EUB+  
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX8578EUB+T    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8578EUB-T    
Active uMAX;10 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX8579EUB    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10-2*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX8579EUB+  
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8579EUB+T    
Active µMAX;10 pin;15.4 mm²
Outline Drawing:21-0061 (PDF)
Land Pattern: 90-0330 (PDF)
Use pkgcode/variation: U10+2*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX8579EUB-T    
Active uMAX;10 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet

Notes:
  1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
  2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
  3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
  4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

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More Information

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Document Ref.: 19-3289 Rev 1; 2005-07-04
This page last modified: 2009-10-12

 


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