MAX5040EUB+ Maxim Integrated Products, MAX5040EUB+ Datasheet

MAX5040EUB+

Manufacturer Part Number

MAX5040EUB+

Description

IC CNTRLR VOLT TRACK 10-UMAX

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX5040EUB.pdf (21 pages)

Specifications of MAX5040EUB+

Applications

Processor

Current - Supply

1.3mA

Voltage - Supply

2.5 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

10-MSOP, Micro10™, 10-uMAX, 10-uSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 21
Download datasheet (947Kb)

The MAX5039/MAX5040 provide intelligent control to

power systems where two supply voltages need track-

ing. These cases include PowerPC

systems, which require a lower CORE voltage supply

and a higher I/O voltage supply.

The MAX5039/MAX5040 control the output voltage of

the CORE and I/O supplies during power-up, power-

down, and brownout situations. They ensure that the

two power supplies rise or fall at the same rate, limiting

the voltage difference between the CORE and I/O sup-

plies. This eliminates stresses on the processor. The

MAX5039/MAX5040 shut down both the CORE and I/O

supplies if either one is shorted or otherwise fails to

come up.

The MAX5040 provides a power-OK (POK) signal that

signals the processor if the CORE supply, the I/O sup-

ply, and the system bus supply (V

respective specified levels. The MAX5039/MAX5040

are targeted for nominal bus V

5.5V. The MAX5039/MAX5040 work with CORE volt-

ages ranging from 800mV to about 3V (depending on

the gate-to-source turn-on threshold of the external N-

channel MOSFET) and I/O voltages ranging from

control of the I/O and CORE voltages using a single

external N-channel MOSFET connected across them.

This MOSFET is not in series with the power paths and

does not dissipate any additional power during normal

system operation. The external MOSFET is only on for

brief periods during power-up/power-down cycling so a

low-cost, small-size MOSFET with a rating of 1/4th to

1/8th of the normal supply current is suitable.

The MAX5039/MAX5040 are offered in space-saving

8-pin µMAX and 10-pin µMAX packages, respectively.

19-2461; Rev 1; 12/03

Typical Operating Circuit and Pin Configurations appear at

end of data sheet.

PowerPC is a registered trademark of IBM Corp.

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.

CORE

PowerPC Systems

Embedded DSPs and ASICs

Embedded 16- and 32-Bit Controller Systems

Telecom/Base Station/Networking

to 4V. The MAX5039/MAX5040 provide tracking

________________________________________________________________ Maxim Integrated Products

General Description

Applications

voltages from 4V to

, DSP, and ASIC

) are above their

Voltage-Tracking Controllers for

PowerPC, DSPs, and ASICs

Power-On and Power-Off With and Without Voltage Tracking

MAX5039EUA-T

MAX5040EUB-T

Provide Tracking of Two External Power Supplies

During Power-Up and Power-Down

Compatible with a Wide Range of External Power

Supplies Independent of Output Power

Bus Voltage Undervoltage Lockout Enables/

Disables CORE and I/O Supplies Together

Detect Short Circuit on V

CORE and I/O Supplies in Either Case

Output Undervoltage Monitoring

POK Status (MAX5040)

Operating V

I/O Voltage Range: V

CORE Voltage Range: 0.8V to V

PART

WITH MAX5039

OR MAX5040

I/O

Supply Voltage Range: 2.5V to 5.5V

I/O

Ordering Information

-40°C to +85°C

TEMP RANGE

CORE

to 4V

and V

I/O

OR MAX5040

MAX5039

WITHOUT

PIN-PACKAGE

8 µMAX

10 µMAX

I/O

Features

, Disable

Related parts for MAX5040EUB+

MAX5040EUB+ Summary of contents

Page 1

... Telecom/Base Station/Networking Typical Operating Circuit and Pin Configurations appear at end of data sheet. PowerPC is a registered trademark of IBM Corp. ________________________________________________________________ Maxim Integrated Products 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. Voltage-Tracking Controllers for ...

Page 2

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs ABSOLUTE MAXIMUM RATINGS (All Voltages Referenced to GND) SDO, and POK ..................................-0.3V to +14V V , NDRV, CC CORE_FB, UVLO, I/O_SENSE, I/O, CORE ..........-0.3V to +4.25V All Pins to V (except POK)............................................. +0.3V ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 2.5V to 5.5V 2V UVLO T = -40°C to +85°C, unless otherwise specified. Typical values are PARAMETER SYMBOL Regulator Amp Gain CORE Pulldown Resistance MONITOR OUTPUTS SDO Output ...

Page 4

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs ( 1.8V 3.3V CORE I/O A SYSTEM POWER-UP/POWER-DOWN (V RISING BEFORE V I NDRV SDO POK I/O CORE 5ms/div CORE_FB REFERENCE (V vs. ...

Page 5

V = 1.8V 3.3V CORE I/O V vs.I SDO SDO(SOURCE -40° 4. +85° +25° -40°C V ...

Page 6

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs PIN NAME MAX5039 MAX5040 Active-Low Shutdown Output. Connect SDO to active-low shutdown input of both CORE and SDO 1 1 I/O supplies. SDO is high when V Supply Voltage Input. Connect V 2 ...

Page 7

Performance During Typical Operation Scope shots are of the MAX5040 EV kit. Figures 1 through 8 demonstrate system performance of the MAX5040 under various power-up, power-down, and fault conditions. In some cases (described in detail below), startup or shutdown of ...

Page 8

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs SYSTEM POWER-UP/POWER-DOWN (V RISING BEFORE V I/O CORE V CC NDRV SDO POK I/O CORE 5ms/div Figure 1. System Power-Up/Power-Down (V I/O Rising Before V CORE ) SYSTEM POWER-UP/POWER-DOWN (V RISING BEFORE V ...

Page 9

CORE and I/O power supplies. The MAX5039/MAX5040 monitor and compare the CORE and I/O voltages as follows. When the I/O voltage is greater than or equal to the CORE voltage, MAX5039/MAX5040 regulate the exter- nal N-channel MOSFET ...

Page 10

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs 800mV CORE_FB UVLO 1.23V I/O CORE BLEED GND I/O_SENSE 1.23V 10 ______________________________________________________________________________________ Functional Diagram MAX5040 V CC 400mV FAULT GENERATOR FAULT 15ms TIMER NDRV SDO POK ...

Page 11

V (5V) IN I/O IN POWER SUPPLY CORE IN POWER SUPPLY 1µF 25.5kΩ 1% UVLO R8 10kΩ 1% Figure 9. Typical Application Circuit for the MAX5039 Designing with MAX5039/MAX5040 The MAX5039/MAX5040 provide intelligent control to ...

Page 12

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs V (5V) IN I/O IN POWER SUPPLY SHDN CORE IN POWER SUPPLY SHDN SDO 1µF 25.5kΩ 1% MAX5040 UVLO R8 10kΩ 1% Figure 10. Typical Application Circuit for ...

Page 13

10µF HD UVLO Figure 11. Circuit Prolongs V After a Brownout/Power-Down CC Condition power supplies startup delay and/or soft-start timing, which are specific to each of the power supplies, CORE and I/O outputs may not ...

Page 14

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs of the maximum output current rating of the CORE or I/O power supplies is adequate. However, care should be taken when selecting this MOSFET to make sure it is capable of sustaining all ...

Page 15

NORMALIZED THERMAL TRANSIENT IMPEDANCE, JUNCTION TO AMBIENT 2 1 DUTY CYCLE = 0.5 0.2 0.1 0.1 0.05 0.02 SINGLE PULSE 0.01 0.0001 0.001 Figure 12. Normalized Thermal Transient Impedance From step 5: the maximum V and V I/O voltage = ...

Page 16

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs Resistor tolerance error: ERROR (%) = RES_TOL (%) (1-Ratio) RESTOL where REF _ Ratio = = V V REGNOM If the nominal CORE set point is 1.6V, the ...

Page 17

Follow the guidelines below to program the UVLO voltage: 1) Determine the V tolerance; ±5% is common Determine the V rising threshold tolerance: UVLO Undervoltage lockout rising trip threshold, V tolerance: 1.230V ±2.5% Programming resistor tolerance: pick ...

Page 18

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs Programming I/O_SENSE Voltage (MAX5040 Only) See the application circuit examples in Figures 9 and 10. I/O_SENSE is used to monitor the I/O output voltage or any other voltage. The result is reported by ...

Page 19

Voltage-Tracking Controllers for Typical Operating Circuit V IN I/O OUT IN POWER SUPPLY SHDN CORE IN OUT POWER SUPPLY SHDN CORE I/O SDO V NDRV CC MAX5039 UVLO CORE_FB GND ______________________________________________________________________________________ PowerPC, DSPs, and ASICs TOP VIEW V SDO I/O ...

Page 20

Voltage-Tracking Controllers for PowerPC, DSPs, and ASICs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 D TOP ...

Page 21

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21 © 2003 Maxim Integrated Products ...

Related keywords

max504
MAX5040EUB+ datasheet
MAX5040EUB+ data sheet
MAX5040EUB+ pdf datasheet
MAX5040EUB+ component
MAX5040EUB+ part
MAX5040EUB+ distributor
MAX5040EUB+ RoHS
MAX5040EUB+ datasheet download