MAX856
PRODUCTION3.3V/5V or Adjustable Output, Step-Up DC-DC Converters
- Part Models
- 6
- 1ku List Price
- Starting From $3.80
Overview
- 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
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.
Applications
- 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
Documentation
Data Sheet 1
Technical Articles 5
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX856CSA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX856CSA+T | Small-Outline IC Narrow (0.15in) | ||
| MAX856CUA+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX856CUA+T | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX856ESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX856ESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 22, 2018 - 1702N ASSEMBLY |
||
| MAX856CSA+ | PRODUCTION | |
| MAX856CSA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX856CSA+T | PRODUCTION | |
| MAX856ESA+T | PRODUCTION | |
|
Sep 19, 2018 - 1753N ASSEMBLY |
||
| MAX856CUA+ | PRODUCTION | |
| MAX856CUA+T | PRODUCTION | |
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX856ESA+ | PRODUCTION | |
| MAX856ESA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| MAX1674 | PRODUCTION | High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters |
Evaluation Kits
Evaluation Kit for the MAX856
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