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Maxim > Products > [Power and Battery Management] 
MAX8621Y, MAX8621Z
Dual Step-Down DC-DC Power-Management ICs for Portable Devices

Six-Output, Dual Step-Down DC-DC Power-Management ICs for Smartphones and Other Portable Devices


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 368kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX8621Y/MAX8621Z power-management integrated circuits (PMICs) are designed for a variety of portable devices including cellular handsets. These PMICs include two high-efficiency step-down DC-DC converters, four low-dropout linear regulators (LDOs) with pin-programmable capability, one open-drain driver, a 60ms (typ) reset timer, and power-on/off control logic. These devices offer high efficiency with a no-load supply current of 160µA, and their small thin QFN 4mm x 4mm package makes them ideal for portable devices.

The step-down DC-DC converters utilize a proprietary 4MHz hysteretic-PWM control scheme that allows for ultra-small external components. Internal synchronous rectification improves efficiency and eliminates the external Schottky diode that is required in conventional step-down converters. The output voltage is adjustable from 0.6V to 3.3V. The output current is guaranteed up to 500mA.

The four LDOs offer low 45µVRMS output noise and low dropout of only 100mV at 100mA. OUT1 and OUT2 deliver 300mA (min) of continuous output current. OUT3 and OUT4 deliver 150mA (min) of continuous output current. The output voltages are pin selectable by SEL1 and SEL2 for flexibility. The MAX8621Y/MAX8621Z offer different sets of LDO output voltages.

A microprocessor reset output (active-low RESET) monitors OUT1 and warns the system of impending power loss, allowing safe shutdown. Active-low RESET asserts during power-up, power-down, shutdown, and fault conditions where VOUT1 is below its regulation voltage.

A 200mA driver output is provided to control LED backlighting or provide an open-drain connection for resistors such as in feedback networks.

An evaluation kit is available:  MAX8621ZEVKIT  

Key Features   Applications/Uses
  • Two 500mA Step-Down Converters
    • Up to 4MHz Switching Frequency
    • Adjustable Output from 0.6V to 3.3V
  • Four Low-Noise LDOs with Pin-Programmable Output Voltages
  • One Open-Drain Driver
  • 60ms (typ) Reset Timer
  • Power-On/Off Control Logic and Sequencing
  • 4mm x 4mm x 0.8mm 24-Pin Thin QFN

 
  		• Cellular Handsets
  		• Digital Cameras
  		• MP3 Players
  		• Smartphones and PDAs
  		• Wireless Local Area Networks (WLANs)

    Key Specifications:  Multifunction PMICs
    Part Number Primary Topology Monitor/Control Features DC-DC/Power Features VIN
    (V)    		 VIN
    (V)    		 VOUT
    (V)    		 VOUT
    (V)    		 Max. IOUT
    (A)    		 Max. IOUT
    (A)    		 Oper. Freq.
    (kHz)    		 Package/Pins Smallest Available Pckg.
    (mm2)    		 Price
    min max min max ≥ ≤ max w/pins See Notes
    MAX8621Y  Step-Down
    Reset Output
    Shutdown
    Adj. Frequency
    Current Limit
    Fixed Freq./PWM
    Internal Pwr. FETs
    Soft Start
    Sync. Rectifier
    		 2.6 5.5 0.6 3.3 0.5 0.5 4000
    TQFN/24
    		 17 $3.70 @1k
    MAX8621Z 
    TQFN/24
    		 $3.70 @1k
    See All Multifunction PMICs (83)

    Diagram
    MAX8621Y, MAX8621Z: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
  		• MAX8621ZEVKIT

    Design Guides
  		• Communications (PDF)
  		• Battery Management (PDF)

    Reliability Reports
  		• Reliability Report: MAX8621Y.pdf MAX8621Z.pdf
  		• Show FIT data for:

    Software/Models
    none

    Ordering Information
    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. More: SeeFull Data Sheet or Part 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.


    Devices: 1-8 of 8

    MAX8621Y Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8621YETG    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8621YETG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8621YETG+    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8621YETG+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8621Z Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX8621ZETG    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444-4*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX8621ZETG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX8621ZETG+  
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX8621ZETG+T    
    		Active TQFN;24 pin;17 mm²
    Outline Drawing: 21-0139 (PDF)
    Land Pattern: 90-0022 (PDF)
    Use pkgcode/variation: T2444+4*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2005-03-16 

    Related Products
    MAX8620Y µPMIC for Microprocessors or DSPs in Portable Equipment

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     Description 
     Key Features 
     Applications/Uses 
     Key Specifications 
     Diagram 

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     Engineering Journals 
     Reliability Reports 
     Software/Models 
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    Document Ref.: 19-3539; Rev 1; 2005-09-21
    This page last modified: 2007-10-04


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