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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 500kB) Download   E-Mail

Description

The MAX1875/MAX1876 dual, synchronized, step-down controller generates two outputs from input supplies ranging from 4.75V to 23V. Each output is adjustable from sub-1V to 18V and supports loads of 10A or higher. Input voltage ripple and total RMS input ripple current are reduced by synchronized 180° out-of-phase operation. The switching frequency is adjustable from 100kHz to 600kHz with an external resistor. Alternatively, the controller can be synchronized to an external clock generated to another MAX1875/MAX1876 or a system clock. One MAX1875/MAX1876 can be set to generate an in-phase, or 90° out-of-phase, clock signal for synchronization with additional controllers. This allows two controllers to operate either as an interleaved two- or four-phase system with each output shifted by 90°. These devices also feature soft-start and soft-stop. The MAX1875/MAX1876 eliminate the need for current-sense resistors by utilizing the low-side MOSFET's on-resistance as a current-sense element. This protects the DC-DC components from damage during output- overload conditions or when output short-circuit faults without requiring a current-sense resistor. Adjustable foldback current limit reduces power dissipation during short-circuit conditions. The MAX1876 includes a power-on reset output to signal the system when both outputs reach regulation. The MAX1875/MAX1876 are available in a 24-pin QSOP package. An evaluation kit is available to speed designs.

An evaluation kit is available:  MAX1875EVKIT  

Key Features		Applications/Uses
Two Independent Output Voltages 180° Out-of-Phase Operation 90° Out-of-Phase Operation (Using Two MAX1875/MAX1876s) Foldback Current Limit 4.75V to 23V Input Supply Range 0 to 18V Output-Voltage Range (Up to 10A) >90% Efficiency Fixed-Frequency Pulse-Width Modulation (PWM) Operation Adjustable 100kHz to 600kHz Switching Frequency External SYNC Input Clock Output for Master/Slave Synchronization Soft-Start and Soft-Stop Active-low RST Output with 140ms Minimum Delay (MAX1876) Lossless Current Limit (No Sense Resistor)		Broadband Routers DSP, ASIC, and FPGA Power Supplies Network-Power Supplies Servers Set-Top Boxes Telecom Power Supplies

Diagram

Typical Operating Circuit

Evaluation Kits

MAX1875EVKIT

Reliability Reports

Show FIT data for: MAX1875 MAX1876 Request Reliability Report for: MAX1875 MAX1876

Software/Models

none

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: 1-10 of 10

MAX1875	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1875EEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1875EEG-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1875EEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1875EEG+T			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1876	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1876EEG-G05			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1876EEG-TG05			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1876EEG			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1876EEG-T			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1876EEG+			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1876EEG+T			Active	QSOP;24 pin;54.2 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0172 (PDF) Use pkgcode/variation: E24+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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