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MAX5072 Dataheets PDF



Part Number MAX5072
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description Dual-Output Buck or Boost Converter
Datasheet MAX5072 DatasheetMAX5072 Datasheet (PDF)

19-3503; Rev 2; 2/06 KIT www.DataSheet4U.com ATION EVALU E L B A IL AVA 2.2MHz, Dual-Output Buck or Boost Converter with POR and Power-Fail Output General Description Features ♦ 4.5V to 5.5V or 5.5V to 23V Input Supply Voltage Range ♦ 0.8V (Buck) to 28V (Boost) Output Voltage ♦ Two Independent Output DC-DC Converters with Internal Power MOSFETs ♦ Each Output can be Configured in Buck or Boost Mode ♦ IOUT1 and IOUT2 of 2A and 1A (Respectively) in Buck Mode ♦ 180° Out-of-Phase Operation ♦ Clock .

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19-3503; Rev 2; 2/06 KIT www.DataSheet4U.com ATION EVALU E L B A IL AVA 2.2MHz, Dual-Output Buck or Boost Converter with POR and Power-Fail Output General Description Features ♦ 4.5V to 5.5V or 5.5V to 23V Input Supply Voltage Range ♦ 0.8V (Buck) to 28V (Boost) Output Voltage ♦ Two Independent Output DC-DC Converters with Internal Power MOSFETs ♦ Each Output can be Configured in Buck or Boost Mode ♦ IOUT1 and IOUT2 of 2A and 1A (Respectively) in Buck Mode ♦ 180° Out-of-Phase Operation ♦ Clock Output for Four-Phase Operation ♦ Switching Frequency Programmable from 200kHz to 2.2MHz ♦ Digital Soft-Start and Independent Converter Shutdown ♦ SYNC Input, Power-On Reset, Manual Reset, And Power-Fail Output ♦ Short-Circuit Protection (Buck)/Maximum DutyCycle Limit (Boost) ♦ Thermal Shutdown ♦ Thermally Enhanced 32-Pin Thin QFN Package Dissipates up to 2.7W at +70°C MAX5072 The MAX5072 is a dual-output DC-DC converter with integrated high-side n-channel power MOSFETs. Each output can be configured either as a buck converter or a boost converter. The MAX5072 is designed to manage the power requirements of xDSL modems. The wide 5.5V to 23V input voltage range allows for the use of inexpensive AC adapters to power the device in xDSL modem applications. Each output is programmable down to 0.8V in the buck mode and up to 28V in the boost mode with an output voltage accuracy of ±1%. In the buck mode, converter 1 and converter 2 can deliver 2A and 1A, respectively. The output switching frequency of each converter can be programmed from 200kHz to 2.2MHz to avoid harmonics in the xDSL frequency band of operation. Each output operates 180° out-of-phase, thus reducing input-capacitor ripple current, size, and cost. A SYNC input facilitates external frequency synchronization. Moreover, a CLKOUT output provides out-of-phase clock signal with respect to converter 2, allowing four-phase operation using two MAX5072 ICs in master-slave configuration. The MAX5072 includes an internal digital soft-start that reduces inrush current, eliminates output-voltage overshoot, and ensures monotonic rise in output voltage during power-up. The device includes a power-good output and power-on reset as well as manual reset. In addition, each converter output can be shut down individually. The MAX5072 features a "dying gasp" output, which goes low when the input voltage drops below a preprogrammed voltage. Protection features include output short-circuit protection for buck mode and maximum duty-cycle limit for boost operation, as well as thermal shutdown. The MAX5072 is available in a thermally enhanced 32-pin thin QFN package that can dissipate 2.7W at +70°C ambient temperature. The device is rated for operation over the -40°C to +85°C extended, or -40°C to +125°C automotive temperature range. Pin Configuration BST1/VDD1 DRAIN1 FSEL1 EN1 24 PGOOD1 SOURCE1 SOURCE1 PGND SGND 23 22 21 20 19 18 17 16 15 14 13 MR BYPASS VL VL V+ OSC PFI SYNC 25 26 27 28 29 30 31 32 1 CLKOUT Applications xDSL Modems xDSL Routers Point-of-Load DC-DC Converters MAX5072 RST TOP VIEW DRAIN1 COMP1 FB1 12 11 10 9 Ordering Information PART MAX5072ETJ TEMP RANGE -40°C to +85°C PIN-PACKAGE PKG CODE PGND SOURCE2 SOURCE2 32 Thin QFN-EP* T3255-4 (5mm x 5mm) 2 BST2/VDD2 3 DRAIN2 4 DRAIN2 5 EN2 6 FB2 7 COMP2 8 PFO *EP = Exposed pad. Ordering Information continued at end of data sheet. THIN QFN ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. www.DataSheet4U.com 2.2MHz, Dual-Output Buck or Boost Converter with POR and Power-Fail Output MAX5072 ABSOLUTE MAXIMUM RATINGS V+ to PGND............................................................-0.3V to +25V SGND to PGND .....................................................-0.3V to +0.3V VL to SGND...................-0.3V to the lower of +6V or (V+ + 0.3V) BST1/VDD1, BST2/VDD2, DRAIN_, PFO, RST, PGOOD1 to SGND .................................................................-0.3V to +30V BST1/VDD1 to SOURCE1, BST2/VDD2 to SOURCE2 ....................................-0.3V to +6V SOURCE_ to SGND................................................-0.6V to +25V EN_ to SGND ................................................-0.3V to (VL + 0.3V) CLKOUT, BYPASS, OSC, FSEL1, COMP1, COMP2, PFI, MR, SYNC, FB_ to SGND....-0.3V to (VL + 0.3V) SOURCE1, DRAIN1 Peak Current ..............................5A for 1ms SOURCE2, DRAIN2 Peak Current ..............................3A for 1ms VL, BYPASS to SGND Short Circuit............................Continuous Continuous Power Dissipation (TA = +70°C) 32-Pin Thin QFN (derate 21.3mW/°C above +70°C).....2758mW* Package Junction-to-Case Thermal Resistance (θJC).......2°C/W Operating Temperature Ranges: MAX5072ETJ (TMIN to TMAX)...........................-40°C to +85°C MAX5072ATJ (TMIN to TMAX)..


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