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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 264kB) Download   E-Mail

Description

The MAX5025-MAX5028 constant-frequency, pulse-width modulating (PWM), low-noise boost converters are intended for low-voltage systems that often need a locally generated high voltage. These devices are capable of generating low-noise, high output voltages required for varactor diode biasing in TV tuners, set-top boxes, and PCI cable modems. The MAX5025-MAX5028 operate from as low as 3V and switch at 500kHz. The constant-frequency, current-mode PWM architecture provides for low output noise that is easy to filter. A 40V lateral DMOS device is used as the internal power switch, making the devices ideal for boost converters up to 36V. The MAX5025/MAX5026 adjustable versions require the use of external feedback resistors to set the output voltage. The MAX5027/MAX5028 offer a fixed 30V output. These devices are available in a small, 6-pin SOT23 package.

An evaluation kit is available:  MAX5026EVKIT  

Key Features		Applications/Uses
Input Voltage Range: 3V to 11V (MAX5026/MAX5028) 4.5V to 11V (MAX5025/MAX5027) Wide Output Voltage Range: VCC to 36V Output Power: 120mW (max) User-Adjustable Output Voltage with MAX5025/MAX5026 Using External Feedback Resistors Fixed 30V Output Voltage: MAX5027/MAX5028 Internal 1.3Ω (typ), 40V Switch Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications 500kHz (typ) Switching Frequency 1µA (max) Shutdown Current Small, 6-Pin SOT23 Package		Avalanche Photodiode Biasing LCD Power Supply Low-Noise Varactor Diode Biasing PCI Cable Modem Set-Top Box Tuner Power Supply TV Tuner Power Supply Voice-Over-Cable

Diagram

Typical Operating Circuit

Application Notes

Application Note 226: Step-Up DC-DC Converter Calibration and Adjustment Using a Digital Potentiometer - MAX5025 Application Note 895: HFAN-03.1.1: Digitally Programmable Low-Noise Avalanche Photo Detector (APD) Bias Circuit - MAX5026 Application Note 1213: Tracking Power Supply Has Dual Outputs - MAX5026 Application Note 1751: High-V DC-DC Converter Is Ideal for MEMS (Warning: High-Voltage Circuit) - MAX5025 Application Note 1831: Low-Noise APD Bias Circuit - MAX5026 Application Note 3608: Using the DS3906 Digital Potentiometer with a Step-Up DC-DC Converter to Provide Fine Control of Output Voltage - MAX5025 Application Note 4221: How to Optimize Avalanche Photodiode (APD) Bias Range Using a DS1841 Logarithmic Resistor - MAX5026

Evaluation Kits

MAX5026EVKIT

Reliability Reports

Reliability Report: MAX5025.pdf Show FIT data for: MAX5025 MAX5026 MAX5027 MAX5028 Request Reliability Report for: MAX5026 MAX5027 MAX5028

Software/Models

MAX5025 Macromodel MAX5025 Orcad Library MAX5025_STEPLOAD Test Circuit File MAX5025_STARTUP Test Circuit File MAX5027 Macromodel MAX5027 Orcad Library MAX5027_STARTUP Test Circuit File MAX5027_STEPLOAD Test Circuit File

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * 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.

Devices: 1-12 of 12

MAX5025	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5025EUT+			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5025EUT-T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5025EUT+T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5026	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5026EUT+			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5026EUT-T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5026EUT+T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5027	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5027EUT+			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5027EUT-T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5027EUT+T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5028	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5028EUT+			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5028EUT-T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5028EUT+T			Active	SOT;6 pin;9 mm² Outline Drawing: 21-0058 (PDF) Land Pattern: 90-0175 (PDF) Use pkgcode/variation: U6SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX5025 MAX5026 MAX5027 MAX5028 New Product Press Release 2001-11-05

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