max6471ta285ad4-t Maxim Integrated Products, Inc., max6471ta285ad4-t Datasheet

max6471ta285ad4-t

Manufacturer Part Number

max6471ta285ad4-t

Description

300ma Ldo Linear Regulators With Internal Microprocessor Reset Circuit

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

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The MAX6469–MAX6484 are low-dropout linear regula-

tors with a fully integrated microprocessor reset circuit.

Each is available with preset output voltages from +1.5V

to +3.3V in 100mV increments and delivers up to 300mA

of load current. These devices consume only 82µA of

supply current. The low supply current, low dropout volt-

age, and integrated reset functionality make these

devices ideal for battery-powered portable equipment.

The MAX6469–MAX6484 include a reset output that indi-

cates when the regulator output drops below standard

microprocessor supply tolerances (-7.5% or -12.5% of

nominal output voltage). This eliminates the need for an

external microprocessor supervisor, while ensuring that

supply voltages and clock oscillators have stabilized

before processor activity is enabled. Push-pull and open-

drain active-low reset outputs are available, with reset

timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min).

The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–

MAX6484 also have a shutdown feature that reduces the

supply current to 0.1µA (typ). The MAX6471–MAX6474/

MAX6479–MAX6482 offer a manual reset input to assert a

microprocessor reset while the regulator output is within

specification. The MAX6475/MAX6476/MAX6483/

MAX6484 feature a remote feedback sense pin for use

with an external NPN transistor for higher-current applica-

tions. The MAX6469–MAX6476 are available in 6-pin

SOT23 and 8-pin TDFN packages. The MAX6477–

MAX6484 are available in a 3 × 3 chip-scale package

(UCSP™). All devices are specified for operation from

-40°C to +85°C.

19-2532; Rev 5; 12/07

UCSP is a trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Handheld Instruments (PDAs, Palmtops)

PCMCIA Cards/USB Devices

Cellular/Cordless Telephones

CD/DVD Drives

Notebook Computers

Digital Cameras

Bluetooth Modules/Wireless LAN

________________________________________________________________ Maxim Integrated Products

General Description

Internal Microprocessor Reset Circuit

Applications

300mA LDO Linear Regulators with

♦ 3

♦ Preset +1.5V to +3.3V Output (100mV Increments)

♦ SET Pin for Adjustable Output Voltage

♦ 75μV

♦ ±2.0% Accuracy Over Temperature

♦ Guaranteed 300mA Output Current

♦ Low Dropout Voltage

♦ 82μA Supply Current, 0.1μA Shutdown Current

♦ Input Reverse Current, Thermal and Short-Circuit

♦ Microprocessor Reset with Four Timeout Options

♦ Push-Pull or Open-Drain RESET

♦ Manual Reset Input

♦ Remote Feedback Sense

*Future product—contact factory for availability.

Note: The first “_ _”are placeholders for the output voltage levels

of the devices. Desired output voltages are set by the suffix found

in the Output Voltage Suffix Guide (Table 1). The third “_” is a

placeholder for the reset threshold accuracy. Desired reset

threshold accuracy is set by the suffix found in the Reset

Threshold Accuracy Guide (Table 2). The “_” following the D is a

placeholder for the reset timeout delay time. Desired reset timeout

delay time is set by the suffix found in the Reset Timeout Delay

Guide (Table 3). For example, the MAX6481BL30BD4-T has a

3.0V output voltage, 12.5% reset threshold tolerance, and a

1200ms (min) reset timeout delay. Sample stock is generally avail-

able on standard versions only (Table 4). Standard versions

require a minimum order increment of 2.5k units. Nonstandard

versions must be ordered in 10k-unit increments. Contact factory

for availability.

Ordering Information continued at end of data sheet.

MAX6469UT_ _ _D_-T

MAX6469TA_ _ _D_-T*

MAX6470UT_ _ _D_-T

MAX6470TA_ _ _D_-T*

Packages

(MAX6477–MAX6484)

Protection

55mV at 150mA

114mV at 300mA

3 UCSP, 6-Pin SOT23, and 8-Pin TDFN

RMS

PART

LDO Output Voltage Noise

Ordering Information

-40°C to +85°C

TEMP RANGE

Features

PIN-

PACKAGE

6 SOT23-6

8 TDFN-8

6 SOT23-6

8 TDFN-8

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max6471ta285ad4-t Summary of contents

Page 1

... CD/DVD Drives Notebook Computers Digital Cameras Bluetooth Modules/Wireless LAN UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. Typical Operating Circuits appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

Page 2

... SET Reference Voltage V TM SET Dual Mode Threshold SET Input Leakage Current Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ Continuous Power Dissipation ( UCSP (derate 10.5mW/°C above +70°C) ............840mW + 0.3V) 6-Pin SOT23 (derate 9.1mW/°C above +70°C).............727mW ...

Page 3

LDO Linear Regulators with Internal ELECTRICAL CHARACTERISTICS (continued 0.5V) or +2.5V, whichever is greater OUT unless otherwise noted.) (Note 2) PARAMETER SYMBOL Dropout Voltage (Notes 3, 4) Output Current Limit Input Reverse Leakage ...

Page 4

LDO Linear Regulators with Internal Microprocessor Reset Circuit ELECTRICAL CHARACTERISTICS (continued 0.5V) or +2.5V, whichever is greater OUT unless otherwise noted.) (Note 2) PARAMETER SYMBOL MR Input Low Voltage MR Input High Voltage ...

Page 5

LDO Linear Regulators with Internal ( 3.3V 3.3µ OUT OUT DROPOUT VOLTAGE vs. LOAD CURRENT 125 V = 3.3V OUT C = 3.3μF OUT 100 ...

Page 6

LDO Linear Regulators with Internal Microprocessor Reset Circuit ( 3.3V 3.3µ OUT OUT LINE-TRANSIENT RESPONSE MAX6469 toc13 5V 4.5V V OUT 20mV/div AC-COUPLED V = 3.3V OUT I = 10mA LOAD ...

Page 7

LDO Linear Regulators with Internal MAX6469/MAX6470/MAX6477/MAX6478 Pin Description PIN BUMP MAX6469/MAX6470 MAX6477/MAX6478 SOT23 TDFN UCSP — EP — MAX6471/MAX6472/MAX6479/MAX6480 ...

Page 8

LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6473/MAX6474/MAX6481/MAX6482 Pin Description PIN BUMP MAX6473/MAX6474 MAX6481/MAX6482 SOT23 TDFN UCSP — ...

Page 9

LDO Linear Regulators with Internal Detailed Description The MAX6469–MAX6484 are ultra-low, quiescent cur- rent, low-dropout linear regulators with an integrated microprocessor reset circuit. These devices guarantee 300mA (min) drive capabilities and are available with preset output voltages in 100mV ...

Page 10

LDO Linear Regulators with Internal Microprocessor Reset Circuit remotely sense the output voltage of the device. Using FB with an external npn transistor, the current drive capa- bility can be increased according to the following equa- tion (Figure 2): ...

Page 11

LDO Linear Regulators with Internal cool. The thermal sensor turns the pass transistor on again after the IC’s junction temperature cools by 20°C, resulting in a pulsed output during continuous thermal overload conditions. Thermal overload protection is designed to ...

Page 12

LDO Linear Regulators with Internal Microprocessor Reset Circuit Power Dissipation Consideration For the SOT23 package, any pin except the SET pin can be used as a heatsink. If the SET pin is used as a heatsink, excessive parasitic capacitance ...

Page 13

LDO Linear Regulators with Internal Table 4. Standard Versions DEVICE MAX6469TA15BD3 MAX6469TA18AD3 MAX6469TA25BD3 MAX6469TA28AD3 MAX6469TA30BD3 MAX6469TA33AD3 MAX6470TA15BD3 MAX6470TA18AD3 MAX6470TA25BD3 MAX6470TA28AD3 MAX6470TA30BD3 MAX6470TA33AD3 MAX6471TA15AD3 MAX6471TA18BD3 MAX6471TA25AD3 MAX6471TA28BD3 MAX6471TA30AD3 MAX6471TA33BD3 MAX6472TA15AD3 MAX6472TA18BD3 MAX6472TA25AD3 MAX6472TA28BD3 MAX6472TA30AD3 MAX6472TA33BD3 MAX6473TA15AD3 MAX6473TA18BD3 MAX6473TA25AD3 MAX6473TA28BD3 MAX6473TA30AD3 ...

Page 14

LDO Linear Regulators with Internal Microprocessor Reset Circuit Table 4. Standard Versions (continued) DEVICE MAX6480BL15BD3 MAX6480BL18AD3 MAX6480BL25BD3 MAX6480BL28AD3 MAX6480BL30BD3 MAX6480BL33AD3 MAX6481BL15BD3 MAX6481BL18AD3 MAX6481BL25BD3 MAX6481BL28AD3 MAX6481BL30BD3 MAX6481BL33AD3 MAX6482BL15BD3 MAX6482BL18AD3 MAX6482BL25BD3 Sample stock is generally available on standard versions only. Standard ...

Page 15

LDO Linear Regulators with Internal TOP VIEW MAX6469 GND 2 5 MAX6470 SHDN 3 4 SOT23-6 OUT OUT SET RESET MAX6471 MAX6472 EP GND MR TDFN ...

Page 16

LDO Linear Regulators with Internal Microprocessor Reset Circuit TOP VIEW OUT UCSP OUT UCSP UCSP DEVICES SHOWN AS MOUNTED ON PC BOARD. BALL SOLDERED DOWN. 16 ______________________________________________________________________________________ ...

Page 17

LDO Linear Regulators with Internal REVERSE IN LEAKAGE SHDN PROTECTION ERROR AMP MAX6475/MAX6476 1.23V MAX6483/MAX6484 RESET TIMEOUT RESET COMPARATOR GND Typical Operating Circuit 2.5V TO 5.5V IN SHDN OUT 3.3μF MAX6469/MAX6470 MAX6477/MAX6478 SET RESET GND ______________________________________________________________________________________ Microprocessor Reset Circuit ...

Page 18

LDO Linear Regulators with Internal Microprocessor Reset Circuit PART TEMP RANGE MAX6471UT_ _ _D_-T -40°C to +85°C MAX6471TA_ _ _D_-T* -40°C to +85°C MAX6472UT_ _ _D_-T -40°C to +85°C MAX6472TA_ _ _D_-T* -40°C to +85°C MAX6473UT_ _ _D_-T -40°C ...

Page 19

LDO Linear Regulators with Internal (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.) ______________________________________________________________________________________ Microprocessor Reset Circuit Package Information PACKAGE OUTLINE, SOT 6L BODY ...

Page 20

LDO Linear Regulators with Internal Microprocessor Reset Circuit (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.) 20 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, SOT ...

Page 21

Page 22

LDO Linear Regulators with Internal Microprocessor Reset Circuit (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.) 22 ______________________________________________________________________________________ Package Information (continued) ...

Page 23

Page 24

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products Revision History DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc. PAGES CHANGED — 13 ...

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