Maxim > Products > Power and Battery Management > MAX856, MAX857, MAX858, MAX859

MAX856, MAX857, MAX858, MAX859

3.3V/5V or Adjustable Output, Step-Up DC-DC Converters
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Status Explanations for product status codes

Active: In Production.

Description

The MAX856-MAX859 are high-efficiency, CMOS, step-up, DC-DC switching regulators for small, low input voltage or battery-powered systems. The MAX856/MAX858 accept a positive input voltage between 0.8V and VOUT and convert it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX857/MAX859 adjustable versions accept 0.8V to 6.0V input voltages and generate higher adjustable output voltages in the 2.7V to 6.0V range. Typical efficiencies are greater than 85%. Typical quiescent supply current is 25µA (1µA in shutdown).

The MAX856-MAX859 combine ultra-low quiescent supply current and high efficiency to give maximum battery life. An internal MOSFET power transistor permits high switching frequencies. This benefit, combined with internally set peak inductor current limits, permits the use of small, low-cost inductors. The MAX856/MAX857 have a 500mA peak inductor current limit. The MAX858/MAX859 have a 125mA peak inductor current limit.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 4 (PDF, 820kB)
Send this datasheet to any email addressE-Mail
An evaluation kit is available: MAX856EVKIT

Key Features

  • 0.8V to 6.0V Input Supply Voltage
  • 0.8V Typ Start-Up Supply Voltage
  • 85% Efficiency at 100mA
  • 25µA Quiescent Current
  • 1µA Shutdown Mode
  • 125mA and 500mA Switch-Current Limits Permit Use of Low-Cost Inductors
  • Up to 500kHz Switching Frequency
  • ±1.5% Reference Tolerance Over Temperature
  • Low-Battery Detector (LBI/LBO)
  • 8-Pin SO and µMax Packages
 

Applications/Uses

  • 2-Cell and 3-Cell Battery-Operated Equipment
  • 3.3V to 5V Step-Up Conversion
  • Glucose Meters
  • Medical Instrumentation
  • Palmtop Computers
  • Personal Data Communicators/Computers
  • Portable Data-Collection Equipment
   

Key Specifications:

Step-Up Switching Regulators
Part Number VIN
(V)		 VIN
(V)		 VOUT
(V)		 VOUT
(V)		 Preset 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
MAX856  0.8 6 3.3 5
3.3
5
 0.15 0.15 Preset 1 500
µMAX/8
PDIP(N)/8
SOIC(N)/8
 16.2 $1.77 @1k
MAX857  2.7 6 - 0.15 0.15 Resistor
µMAX/8
PDIP(N)/8
SOIC(N)/8
 30.9 $1.77 @1k
MAX858  3.3 5
3.3
5
 0.06 0.06 Preset
µMAX/8
PDIP(N)/8
SOIC(N)/8
 30.9 $1.77 @1k
MAX859  2.7 6 - 0.06 0.06 Resistor
µMAX/8
PDIP(N)/8
SOIC(N)/8
 16.2 $1.77 @1k
See All Step-Up Switching Regulators (91)
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

MAX856, MAX857, MAX858, MAX859: Typical Operating Circuit
Typical Operating Circuit

Application Notes

Application Note 484   Harnessing Solar Power with Smart Power-Conversion Techniques
Tutorial 658   Choose the Right Ultra-Thin DC-DC Converter for a Compact PCMCIA Card
Tutorial 671   Energy Management for Small Portable Systems
Application Note 950   Single-Cell Boost Converter Generates Auxiliary Bias For LCD
Application Note 2026   Boost Converter Generates Three Analog Rails

Reliability Reports

Reliability Report: MAX856.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

none

Ordering Information

Filters: Part Number: Package: Temperature: Tape and Reel Sample
Devices: 1-50 / 54 <-- Previous  1 2   Next -->
Part Number Free
Sample		 Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX856C/D    
Active   DICE SALES;NA pin;DICE;

Land Pattern: Not Applicable
Use pkgcode/variation: DICE*
See data sheet
MAX856CPA    
Active MAX856CSA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX856CSA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX856CSA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856CSA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856CSA-T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX856CUA    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX856CUA+  
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856CUA+T    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856CUA-T    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX856ESA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX856ESA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856ESA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX856ESA-T    
Active   N.SO;8 pin

Land Pattern: Not Available

-40°C to +85°C See data sheet
MAX857C/D    
Active   DICE SALES;NA pin;DICE;

Land Pattern: Not Applicable
Use pkgcode/variation: DICE*
See data sheet
MAX857CPA    
Active MAX857CSA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX857CSA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX857CSA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX857CSA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX857CSA-T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX857CUA    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX857CUA-T    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX857EPA    
Active MAX857ESA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX857ESA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX857ESA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX857ESA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX857ESA-T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX858C/D    
Active   DICE SALES;NA pin;DICE;

Land Pattern: Not Applicable
Use pkgcode/variation: DICE*
See data sheet
MAX858CPA    
Active MAX858CSA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX858CSA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX858CSA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX858CSA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX858CSA-T    
Active   N.SO;8 pin

Land Pattern: Not Available

0°C to +70°C See data sheet
MAX858CUA    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX858CUA-T    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX858EPA    
Active MAX858ESA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX858ESA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX858ESA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX858ESA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX858ESA-T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
Part Number Free
Sample		 Buy Status Explanations for product status codes Recommended Replacement Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR * 		Temp RoHS/Lead-Free?
Materials Analysis
MAX859C/D    
Active   DICE SALES;NA pin;DICE;

Land Pattern: Not Applicable
Use pkgcode/variation: DICE*
See data sheet
MAX859CPA    
Active MAX859CSA

 		 PDIP(N);8 pin;79.7 mm²
Outline Drawing:21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX859CSA    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-4*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX859CSA+  
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX859CSA+T    
Active   SOIC(N);8 pin;30.9 mm²
Outline Drawing:21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+4*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX859CSA-T    
Active   N.SO;8 pin

Land Pattern: Not Available

0°C to +70°C See data sheet
MAX859CUA    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
MAX859CUA+  
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8+1*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX859CUA+T    
Active   uMAX;

Land Pattern: Not Available

0°C to +70°C See data sheet
MAX859CUA-T    
Active   µMAX;8 pin;16.2 mm²
Outline Drawing:21-0036 (PDF)
Land Pattern: 90-0092 (PDF)
Use pkgcode/variation: U8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis
Devices: 1-50 / 54 <-- Previous  1 2   Next -->

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

MAX856EVKIT Evaluation Kit for the MAX856

Products with Similar Part Numbers

MAX856EVKIT Evaluation Kit for the MAX856


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Description
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Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
Application Notes
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Software/Models
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Document Ref.: 19-0211 Rev 4; 1996-05-01
This page last modified: 2007-05-30

 


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