MAX5073 2.2MHz, Dual-Output Buck or Boost Converter with Internal Power MOSFETs

Description

The MAX5073 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 device is capable of operating from a wide 5.5V to 23V input voltage range. 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 a radio power supply or to reduce the size of the power supply. 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 MAX5073 ICs in master-slave configuration.

The MAX5073 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 individual shutdown and a power-good output for each converter. Protection features include output short-circuit protection for buck mode and maximum duty-cycle limit for boost operation, as well as thermal shutdown.

The MAX5073 is available in a thermally enhanced 28- 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 operating temperature range.

Key Features

Applications/Uses

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
I_OUT1 and I_OUT2 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 Sync Input
Individual Converter Shutdown and Power-Good Output
Short-Circuit Protection (Buck)/Maximum Duty- Cycle Limit (Boost)
Thermal Shutdown
Thermally Enhanced 28-Pin Thin QFN Package Dissipates up to 2.7W at +70°C

	Automotive Radio Power Supply
	Networking Line Cards
	Point-of-Load DC-DC Converters
	Power-Over-Ethernet Postregulation for PDs
	Telecom Line Cards

Key Specifications: Step-Down Switching Regulators

Part Number

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

I_OUT (A)

Output Adj. Method

Operating Current, I_CC (max) (mA)

Number of DC-DC Outputs

Operating Freq. (kHz)

Package

Price^**

MAX5073

5.5

0.8

Resistor

2200

THIN QFN/28
THIN QFN/32

$1.71 @ 1k

See All Step-Down Switching Regulators (223)

Key Specifications: Step-Up Switching Regulators

Part Number

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

I_OUT (A)

Output Adj. Method

Operating Current, I_CC (max) (mA)

Number of DC-DC Outputs

Operating Freq. (kHz)

Package

Price^**

MAX5073

5.5

0.8

Resistor

2200

THIN QFN/28
THIN QFN/32

$1.71 @ 1k

See All Step-Up Switching Regulators (90)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Reliability Reports


		Show FIT data for:

		AEC-Q100 Reliability Report MAX5073ETI+.pdf

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Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
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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: 1-8 of 8

MAX5073

Free
Sample

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Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX5073ATI+T

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855+6*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5073ATI-T

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855-6*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX5073ATI

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855-6*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX5073ATI+

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855+6*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5073ETI

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5073ETI-T

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855-6*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5073ETI+

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5073ETI+T

THIN QFN;28 pin;
Dwg: 21-0140 (PDF)
Use pkgcode/variation: T2855+6*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

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MAX5072 2.2MHz, Dual-Output Buck or Boost Converter with POR and Power-Fail Output