300mA Linear Regulators with Internal Microprocessor Reset Circuit

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300mA Linear Regulators with Internal Microprocessor Reset Circuit

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300mA Linear Regulators with Internal Microprocessor Reset Circuit
UCSP, 6-Pin SOT23, 8-Pin TDFN Packages Preset +1.5V +3.3V Output (100mV Increments) Adjustable Output Voltage 75µVRMS Output Voltage Noise (MAX6477-MAX6484) ±2.0% Accuracy Over Temperature Guaranteed 300mA Output Current Dropout Voltage 55mV 150mA 114mV 300mA 82µA Supply Current, 0.1µA Shutdown Current Input Reverse Current, Thermal Short-Circuit Protection Microprocessor Reset with Four Timeout Options Push-Pull Open-Drain RESET Manual Reset Input Remote Feedback Sense
MAX6469-MAX6484
MAX6469-MAX6484 low-dropout linear regulators with fully integrated microprocessor reset circuit. Each available with preset output voltages from +1.5V +3.3V 100mV increments delivers 300mA load current. These devices consume only 82µA supply current. supply current, dropout voltage, integrated reset functionality make these devices ideal battery-powered portable equipment. MAX6469-MAX6484 include reset output that indicates when regulator output drops below standard microprocessor supply tolerances (-7.5% -12.5% nominal output voltage). This eliminates need external microprocessor supervisor, while ensuring that supply voltages clock oscillators have stabilized before processor activity enabled. Push-pull opendrain active-low reset outputs available, with reset timeout periods 2.5ms, 20ms, 150ms, 1200ms (min). MAX6484 also have shutdown feature that reduces supply current 0.1µA (typ). MAX6471-MAX6474/ MAX6479-MAX6482 offer manual reset input assert microprocessor reset while regulator output within specification. MAX6475/MAX6476/MAX6483/ MAX6484 feature remote feedback sense with external transistor higher-current applications. MAX6469-MAX6476 available 6-pin SOT23 8-pin TDFN packages. MAX6477- MAX6484 available chip-scale package (UCSPTM). devices specified operation from -40°C +85°C.
Ordering Information
PART MAX6469UT_ _D_-T MAX6469TA_ _D_-T* MAX6470UT_ _D_-T MAX6470TA_ _D_-T* TEMP RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PINPACKAGE SOT23-6 TDFN-8 SOT23-6 TDFN-8
Applications
Handheld Instruments (PDAs, Palmtops) PCMCIA Cards/USB Devices Cellular/Cordless Telephones CD/DVD Drives Notebook Computers Digital Cameras Bluetooth Modules/Wireless
*Future product-contact factory availability. Note: first _"are placeholders output voltage levels devices. Desired output voltages suffix found Output Voltage Suffix Guide (Table third placeholder reset threshold accuracy. Desired reset threshold accuracy suffix found Reset Threshold Accuracy Guide (Table following placeholder reset timeout delay time. Desired reset timeout delay time suffix found Reset Timeout Delay Guide (Table example, MAX6481BL30BD4-T 3.0V output voltage, 12.5% reset threshold tolerance, 1200ms (min) reset timeout delay. Sample stock generally available standard versions only (Table Standard versions require minimum order increment 2.5k units. Nonstandard versions must ordered 10k-unit increments. Contact factory availability. Ordering Information continued data sheet.
UCSP trademark Maxim Integrated Products, Inc. Configurations appear data sheet. Typical Operating Circuits appear data sheet.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced GND, unless otherwise noted.) SHDN, OUT, .-0.3V .-0.3V (VIN 0.3V) RESET (push-pull) .-0.3V (VOUT 0.3V) RESET (open drain).-0.3V Short Circuit .Continuous Input/Output Current (all pins except OUT) .20mA Continuous Power Dissipation +70°C) UCSP (derate 10.5mW/°C above +70°C) .840mW 6-Pin SOT23 (derate 9.1mW/°C above +70°C).727mW 8-Pin TDFN (derate 24.4mW/°C above +70°C) .1951mW Operating Temperature Range .-40°C +85°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C Bump Reflow Temperature (Note .+235°C
Note MAX6477-MAX6484 constructed using unique packaging techniques that impose limit thermal profile devices exposed during board-level solder attach rework. This limit permits only solder profiles recommended industry-standard specification, JEDEC 020A, paragraph 7.6, Table IR/VPR Convection reflow. Pre-heating required. Hand wave soldering allowed.
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN (VOUT 0.5V) +2.5V, whichever greater, COUT 3.3µF, -40°C +85°C. Typical specifications +25°C, unless otherwise noted.) (Note
PARAMETER Input Voltage Range Input Undervoltage Lockout Supply Current (Ground Current) Shutdown Supply Current REGULATOR CIRCUIT Output Current Output Voltage Accuracy (Fixed Output Voltage Operation, Table MAX6469-MAX6476 Output Voltage Accuracy (Fixed Output Voltage Operation, Table MAX6477-MAX6484 Adjustable Output Voltage Range Reference Voltage Dual ModeThreshold Input Leakage Current IOUT 150mA, +25°C IOUT 150mA, -40°C +85°C IOUT 300mA, -40°C +85°C IOUT 100mA, +25°C IOUT 100mA, -40°C +85°C IOUT 300mA, -40°C +85°C (Note VSET ISET VSET +1.2V (Note SYMBOL VUVLO ISHDN falling IOUT IOUT 300mA +25°C -1.3 -2.3 -2.7 -1.1 -2.0 -2.5 VSET 1.200 CONDITIONS 2.25 2.47 UNITS +1.3 +2.3 +2.7 +1.1 +2.0 +2.5 1.258 ±100
1.229
Dual Mode trademark Maxim Integrated Products, Inc.
300mA Linear Regulators with Internal Microprocessor Reset Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VIN (VOUT 0.5V) +2.5V, whichever greater, COUT 3.3µF, -40°C +85°C. Typical specifications +25°C, unless otherwise noted.) (Note
PARAMETER SYMBOL CONDITIONS VOUT +3.3V (fixed output operation) VOUT +3.0V (fixed output operation) VOUT +2.8V (fixed output operation) VOUT +2.5V (fixed output operation) Output Current Limit Input Reverse Leakage Current (OUT Leakage Current) Startup Time Response SHDN Input Voltage SHDN Input High Voltage SHDN Input Current Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis Line Regulation Load Regulation TSHDN TSHDN VOUT 1.5V, 2.5V 5.5V, IOUT 10mA VOUT 1.5V, 2.5V, IOUT 150mA 10Hz 100kHz, 0.1µF, IOUT 100mA, VOUT 1.5V MAX64_ VTHOUT MAX64_ MAX6469-MAX6476 MAX6477-MAX6484 SHDN 0.09 µVRMS 2.5V (Note VOUT 5.5V, SHDN deasserted Rising edge SHDN VOUT within specification, GND, IOUT 10mA IOUT 50mA IOUT 150mA IOUT 300mA IOUT 50mA IOUT 150mA IOUT 300mA IOUT 50mA IOUT 150mA IOUT 300mA IOUT 50mA IOUT 150mA IOUT 300mA 0.01 UNITS
MAX6469-MAX6484
Dropout Voltage (Notes
Output Voltage Noise
RESET CIRCUIT VOUT Reset Threshold (VFB MAX6475/MAX6476/ MAX6483/MAX6484) (Note VOUT Reset Delay (VFB MAX6475/MAX6476/ MAX6483/MAX6484) Reset Timeout Period (Note 1200 92.5 87.5 3.75 1800 2400 %VOUT
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
ELECTRICAL CHARACTERISTICS (continued)
(VIN (VOUT 0.5V) +2.5V, whichever greater, COUT 3.3µF, -40°C +85°C. Typical specifications +25°C, unless otherwise noted.) (Note
PARAMETER Input Voltage Input High Voltage Minimum Input Pulse Glitch Rejection Reset Delay Pullup Resistance RESET Output Voltage (Open Drain) Open-Drain Reset Output Leakage Current ILKG RESET Output Voltage Push-Pull VOUT 1.0V, ISINK 50µA, RESET asserted VOUT 1.5V, ISINK 3.2mA, RESET asserted (Note VOUT 1.0V, ISINK 50µA, RESET asserted VOUT 1.5V, ISINK 3.2mA, RESET asserted VOUT 2.0V, ISOURCE 500µA, RESET deasserted VOUT SYMBOL (Note VOUT CONDITIONS VOUT UNITS
Note Note Note Note Note
devices 100% production tested +25°C guaranteed correlation TMIN TMAX. Guaranteed design. Dropout voltage defined (VIN VOUT) when VOUT below value VOUT VOUT(NOM) MAX6473/MAX6474/MAX6481/MAX6482 guaranteed design VOUT 2.5V. Select reset timeout period using Reset Timeout Delay Guide (Table Insert appropriate suffix part number when ordering.
Typical Operating Characteristics
(VIN VOUT 3.3V, COUT 3.3µF, +25°C, unless otherwise noted.)
GROUND CURRENT INPUT VOLTAGE LOAD)
MAX6469 toc01
GROUND CURRENT INPUT VOLTAGE (300mA LOAD)
MAX6469 toc02
MAXIMUM TRANSIENT DURATION RESET THRESHOLD OVERDRIVE
MAX6469 toc03
GROUND CURRENT (µA) INPUT VOLTAGE +85°C +25°C -40°C
GROUND CURRENT (µA) +85°C INPUT VOLTAGE +25°C -40°C
PULSE DURATION (µs) RESET THRESHOLD OVERDRIVE (mV)
RESET ASSERTS ABOVE THIS LINE
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Typical Operating Characteristics (continued)
(VIN VOUT 3.3V, COUT 3.3µF, +25°C, unless otherwise noted.)
REGION STABLE COUT LOAD CURRENT
MAX6469 toc05 MAX6469 toc06
DROPOUT VOLTAGE LOAD CURRENT
MAX6469 toc04
PSRR FREQUENCY
PSRR (dB) VOUT 3.3V COUT 3.3µF ILOAD 30mA
VOUT 3.3V COUT 3.3µF DROPOUT VOLTAGE (mV)
COUT
COUT 4.7µF COUT 3.3µF
0.01 1000 LOAD CURRENT (mA) FREQUENCY (kHz)
STABLE REGION
LOAD CURRENT (mA)
OUTPUT NOISE
MAX6469 toc07
OUTPUT NOISE FREQUENCY
2.5V VOUT 1.5V IOUT 100mA
MAX6469 toc08
SHUTDOWN RESPONSE
MAX6469 toc09
4.5V VOUT 3.3V ILOAD 100mA
100µV/div
VRMS (µV)
VSHDN 5V/div
VOUT 2V/div ILOAD 50mA
500µs/div FREQUENCY (Hz) 100k 20ms/div
STARTUP RESPONSE
MAX6469 toc10
LOAD-TRANSIENT RESPONSE
MAX6469 toc11
LOAD-TRANSIENT RESPONSE NEAR DROPOUT
MAX6469 toc12
2V/div
VOUT 3.3V ILOAD 100mA
VOUT 2V/div
VOUT 20mV/div
VOUT 5mV/div
10µs/div
100µs/div
10µs/div
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Typical Operating Characteristics (continued)
(VIN VOUT 3.3V, COUT 3.3µF, +25°C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE
MAX6469 toc13
RESET DELAY RESPONSE
MAX6469 toc14
RESET RESPONSE
MAX6469 toc15
4.5V
500mV/div 2V/div 2V/div
VOUT 20mV/div AC-COUPLED RESET 2V/div VOUT 3.3V ILOAD 10mA 100µs/div 200ms/div 200ns/div RESET 2V/div
RESET RESPONSE RISING
MAX6469 toc16
NORMALIZED OUTPUT VOLTAGE TEMPERATURE
NORMALIZED +25°C
MAX6469 toc17
1.012
RESET 2V/div
NORMALIZED OUTPUT VOLTAGE
1.006 ILOAD 10mA 1.000 ILOAD 300mA
VOUT 2V/div 5V/div 200ms/div
0.994
ILOAD 150mA
0.988 TEMPERATURE (°C)
300mA Linear Regulators with Internal Microprocessor Reset Circuit
MAX6469/MAX6470/MAX6477/MAX6478 Description
MAX6469/MAX6470 SOT23 TDFN BUMP MAX6477/MAX6478 UCSP SHDN Regulator Input. Bypass with 0.1µF capacitor. Ground. This also functions heatsink. Solder large pads circuit-board ground plane maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN normal operation. Active-Low Reset Output. RESET remains while VOUT below reset threshold. RESET remains duration reset timeout period after reset conditions terminated. RESET available open-drain push-pull configurations. Feedback Input Externally Setting Output Voltage. Connect select preset output voltage. Connect external resistor-divider network adjustable output operation. Regulator Output. Bypass with minimum 3.3µF low-ESR capacitor. NAME FUNCTION
MAX6469-MAX6484
RESET
MAX6471/MAX6472/MAX6479/MAX6480 Description
MAX6471/MAX6472 SOT23 TDFN BUMP MAX6479/MAX6480 UCSP Regulator Input. Bypass with 0.1µF capacitor. Ground. This also functions heatsink. Solder large pads circuit-board ground plane maximize thermal dissipation. Active-Low Manual Reset Input. reset output asserted while pulled remains asserted duration reset timeout period after transitions from high. Leave unconnected connect VOUT used. internal pullup resistor (typ) VOUT. Active-Low Reset Output. RESET remains while VOUT below reset threshold while held low. RESET remains duration reset timeout period after reset conditions terminated. RESET available open-drain push-pull configurations. Feedback Input Externally Setting Output Voltage. Connect select preset output voltage. Connect external resistor-divider network adjustable output operation. Regulator Output. Bypass with minimum 3.3µF low-ESR capacitor. NAME FUNCTION
RESET
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
MAX6473/MAX6474/MAX6481/MAX6482 Description
MAX6473/MAX6474 SOT23 TDFN BUMP MAX6481/MAX6482 UCSP SHDN Regulator Input. Bypass with 0.1µF capacitor. Ground. This also functions heatsink. Solder large pads circuit-board ground plane maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN normal operation. Active-Low Reset Output. RESET remains while VOUT below reset threshold while held low. RESET remains duration reset timeout period after reset conditions terminated. RESET available open-drain push-pull configurations. Active-Low Manual Reset Input. reset output asserted while pulled remains asserted duration reset timeout period after transitions from high. Leave unconnected connect VOUT used. internal pullup resistor (typ) VOUT. Regulator Output. Bypass with minimum 3.3µF (min) low-ESR capacitor. NAME FUNCTION
RESET
MAX6475/MAX6476/MAX6483/MAX6484 Description
MAX6475/MAX6476 SOT23 TDFN BUMP MAX6483/MAX6484 UCSP SHDN Regulator Input. Bypass with 0.1µF capacitor. Ground. This also functions heatsink. Solder large pads circuit-board ground plane maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN normal operation. Active-Low Reset Output. RESET remains while below reset threshold. RESET remains duration reset timeout period after reset conditions terminated. RESET available open-drain push-pull configurations. Feedback Input Linear Regulator Controller Remote Sense Applications. Connect external load (VCC) obtain fixed output voltage. Regulator Output. Bypass with minimum 3.3µF low-ESR capacitor. NAME FUNCTION
RESET
300mA Linear Regulators with Internal Microprocessor Reset Circuit
Detailed Description
MAX6469-MAX6484 ultra-low, quiescent current, low-dropout linear regulators with integrated microprocessor reset circuit. These devices guarantee 300mA (min) drive capabilities available with preset output voltages 100mV increments between +1.5V +3.3V. internal reset circuit monitors regulator output voltage asserts reset output when regulator output below microprocessor supply tolerance.
MAX6469-MAX6484
2.5V 5.5V
MAX6469-MAX6472 MAX6477-MAX6480
(MR) MANUAL RESET
COUT
Regulator
regulator core operates with +2.5V +5.5V input voltage range. output voltage offered 100mV increments between +1.5V +3.3V (contact factory other output voltage options). MAX6469- MAX6472/MAX6477-MAX6480 offer adjustable output voltage implemented with external resistordivider network between OUT, SET, (Figure must connected either fixed VOUT external divider adjustable VOUT. MAX6469-MAX6472/MAX6477-MAX6480 automatically determine feedback path depending connection SET. Typical Operating Circuit shows typical connection MAX6469. internally regulated low-dropout (LDO) linear regulator that powers microprocessor.
MAX6471/MAX6472/MAX6479/MAX6480 ONLY
Figure Adjustable Output Voltage Configuration
reset threshold. RESET asserts when pulled RESET asserts when SHDN pulled (MAX6469/ Shutdown MAX6484 only) SHDN allows regulator shut down, thereby reducing total consumption device. SHDN provides digitally controlled active-low shutdown. shutdown mode, pass transistor, control circuit, reference turn reduce supply current below 0.1µA. Connect SHDN normal operation. Manual Reset Input only) Many µP-based products require manual reset capability, allowing operator, test technician, external logic circuitry initiate reset. logic asserts reset while regulator output voltage still within tolerance. Reset remains asserted while reset timeout period (tRP) after returns high. input internal pullup (typ) OUT. driven with TTL/CMOS logic levels with open-drain/collector outputs. Connect normally open switch from create manual reset function; external debounce circuitry required. driven from long cables device used noisy environment, connect 0.1µF capacitor from provide additional noise immunity. Feedback Input only) feedback input (FB) connects internal resistordivider network (Functional Diagram). internally connected VOUT, result used
Reset Circuit
reset supervisor circuit fully integrated MAX6469-MAX6484 uses same reference voltage regulator. supply tolerance reset thresholds, -7.5% -12.5%, provided each type device. -7.5% Reset: Reset does assert until regulator output voltage least tolerance always asserts before regulator output voltage -10% tolerance. -12.5% Reset: Reset does assert until regulator output voltage least -10% tolerance always asserts before regulator output voltage -15% tolerance.
RESET Output µP's reset input starts known state. MAX6469-MAX6484 supervisory circuits assert RESET during power-up, power-down, brownout conditions. RESET asserts when input voltage below undervoltage lockout threshold. RESET asserts when VOUT below reset threshold remains asserted least minimum selected reset timeout period (tRP, Table after rises above undervoltage lockout threshold VOUT rises above
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
remotely sense output voltage device. Using with external transistor, current drive capability increased according following equation (Figure IOUT(TOTAL) IOUT (+1) external pass transistor must meet specifications current gain, power dissipation, collector current. beta influences maximum output current circuit deliver. largest guaranteed output current given ILOAD (max) 300mA beta (min). transistor's rated power dissipation must exceed actual power dissipated transistor. power dissipated (PD) equals maximum load current (ILOAD (max)) times maximum input-to-output voltage differential: ILOAD (max) (VIN (max) rated transistor collector current must exceed maximum load current. OUT-to-GND current through 40µA (typ). regulator output held with external super capacitor backup battery until battery replaced. RESET output asserted while battery removed place system low-power mode. Volatile memory content maintained until super capacitor battery voltage drops below standby specifications. RESET deasserts when battery been replaced exceeds desired reset threshold. nonrechargeable backup battery applications, place reverse diode between backup battery prevent battery charging). external diode does affect regulator's dropout voltage because between output processor/memory supply. diode replaced with current-limiting resistor rechargeable backup battery applications.
Current Limit
MAX6469-MAX6484 include internal currentlimit circuit that monitors controls pass transistor's gate voltage, limiting output current 450mA (min). output shorted ground indefinitely without damaging part.
Reverse Leakage Protection
Reverse Current
internal circuit monitors MAX6469-MAX6484 input output voltages. When output voltage greater than input voltage, internal IN-to-OUT pass transistor parasitic diode turn off. external voltage applied does reverse charge battery power source applied (the leakage path from 0.01µA typ). When output voltage exceeds input voltage, powers device shutdown must logic high (greater than VOUT). RESET asserts until exceeds above specified VTHOUT threshold (based selected adjusted regulator nominal voltage).
Thermal Shutdown
When junction temperature (TJ) exceeds +180°C (typ), thermal sensor signals shutdown logic, turning pass transistor allowing
REMOVABLE LITHIUM 3-CELL ALKALINE
Reverse Ground Current
MAX6469-MAX6484 maintain OUT-to-GND reverse-current flow when power source removed. When floats (input battery removed) SHDN pulled VOUT external diode),
5.0V
MAX6469- MAX6484
SHDN
3.3µF 3.0V LITHIUM
MEMORY
TOTAL CURRENT
3.3V
REMOVABLE LITHIUM 3-CELL ALKALINE
MAX6475/MAX6476 MAX6483/MAX6484
RESET
3.3µF
0.1µF
RPULLUP
MAX6469- MAX6484
SHDN
3.3µF SUPERCAP MEMORY
Figure High-Current, External Transistor Application
Figure Battery Backup
300mA Linear Regulators with Internal Microprocessor Reset Circuit
cool. thermal sensor turns pass transistor again after IC's junction temperature cools 20°C, resulting pulsed output during continuous thermal overload conditions. Thermal overload protection designed protect MAX6469-MAX6484 event fault conditions. continuous operation, exceed absolute maximum junction temperature rating TJMAX +150°C. Operating Region Power Dissipation MAX6469-MAX6484's maximum power dissipation depends thermal resistance case circuit board, temperature difference between junction ambient air, rate airflow. power dissipation across device IOUT (VIN VOUT) maximum power dissipation PMAX where temperature difference between junction surrounding air, thermal resistance package, thermal resistance through board, copper traces, other materials surrounding air. MAX6469-MAX6476 TDFN package 41°C/W, MAX6469-MAX6476 package 110°C/W. MAX6469-MAX6484's ground (GND) performs dual function providing electrical connection system ground channeling heat away. Connect system ground using large ground plane. continuous operation, exceed absolute maximum junction temperature rating TJMAX +150°C. Choose maintain stability, accuracy high-frequency power-supply rejection. Avoid selecting resistor values greater than 100k. preset voltage mode, impedance between ground should always less than 50k. most applications, connect directly ground.
MAX6469-MAX6484
Low-Noise UCSP Output
MAX6477-MAX6484 UCSP products include internal filtering yield output noise without additional external bypass capacitor. devices yield 75µVRMS (typ) output noise (for VOUT 3.0V) 150µVRMS (for 3.3V). This low-noise feature makes MAX6477-MAX6484 ideal audio applications.
Capacitor Selection Regulator Stability
stable operation over full temperature range with load currents 300mA, 3.3µF (min) ceramic output capacitor with <0.2. reduce noise improve load transient response, stability, power-supply rejection, large output capacitor values such 10µF. Note that some ceramic capacitors exhibit large capacitance variation with temperature. With capacitor dielectrics such Y5V, 4.7µF more ensure stability over temperature. With capacitor dielectrics, 3.3µF should sufficient operating temperatures. Higher capacitors require more capacitance maintain stability. graph Region Stable Load Current shown Typical Operating Characteristics. improve power-supply rejection transient response, capacitor between GND. MAX6469-MAX6484 remain stable with purely resistive loads current loads 300mA.
Applications Information
Output Voltage Selection
MAX6469-MAX6484 feature dual-mode operation: they operate either preset output voltage mode adjustable mode. preset voltage mode, internal feedback resistors MAX6469-MAX6484's output from +1.5V +3.3V (Table Select this mode connecting ground (MAX6469-MAX6472/ MAX6477-MAX6480). adjustable mode, select output between 1.25V 5.5V using external resistors connected voltage-divider (Figure output voltage following equation: VOUT VSET where VSET 1.23V. simplify resistor selection: (VOUT VSET
Reset Transient Immunity
reset circuit relatively immune short-duration, falling transients. Typical Operating Characteristics section shows graph Maximum Transient Duration Reset Threshold Overdrive which reset asserted. graph produced using falling VOUT transients starting VOUT ending below reset threshold magnitude indicated (reset threshold overdrive). graph shows maximum pulse width that falling VOUT transient typically have without triggering reset pulse. amplitude transient increases (i.e., goes further below reset threshold), maximum allowable pulse width decreases. Typically, VOUT transient that goes only 10mV below reset threshold lasts 75µs does trigger reset pulse.
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Power Dissipation Consideration
SOT23 package, except used heatsink. used heatsink, excessive parasitic capacitance affect stability. TDFN package, exposed metal back side package connects chip. This metal used heatsink.
UCSP Reliability
chip-scale package (UCSP) represents unique packaging form factor that might perform equally packaged product through traditional mechanical reliability tests. reliability integrally linked user's assembly methods, circuit-board material, usage environment. user should closely review these areas when considering package. Performance through operating life test moisture resistance remains uncompromised, because primarily determined wafer-fabrication process. Mechanical stress performance greater consideration package. CSPs attached through direct solder contact user's board, forgoing inherent stress relief packaged product's lead frame. Solder-joint contact integrity must considered. Information Maxim's qualification plan, test data, recommendations detailed UCSP application note Maxim's website www.maxim-ic.com.
UCSP Consideration
general UCSP package information layout considerations, refer Maxim Application Note: WaferLevel Chip-Scale Package.
Table Output Voltage Suffix Guide
SUFFIX OUTPUT VOLTAGE 2.85
Table Reset Threshold Accuracy Guide
SUFFIX VOUT RESET TOLERANCE -7.5 -12.5
Table Reset Timeout Delay Guide
SUFFIX MINIMUM RESET TIMEOUT PERIOD (ms) 1200
Note: Factory-trimmed custom output voltages available; contact factory availability.
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Table 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 MAX6473TA33BD3 MAX6474TA15AD3 MAX6474TA18BD3 MAX6474TA25AD3 MARK DEVICE MAX6474TA28BD3 MAX6474TA30AD3 MAX6474TA33BD3 MAX6475TA15BD3 MAX6475TA18AD3 MAX6475TA25BD3 MAX6475TA28AD3 MAX6475TA30BD3 MAX6475TA33AD3 MAX6476TA15BD3 MAX6476TA18AD3 MAX6476TA25BD3 MAX6476TA28AD3 MAX6476TA30BD3 MAX6476TA33AD3 MAX6477BL15BD3 MAX6477BL18AD3 MAX6477BL25BD3 MAX6477BL28AD3 MAX6477BL30BD3 MAX6477BL33AD3 MAX6478BL15BD3 MAX6478BL18AD3 MAX6478BL25BD3 MAX6478BL28AD3 MAX6478BL30BD3 MAX6478BL33AD3 MAX6479BL15AD3 MAX6479BL18BD3 MAX6479BL25AD3 MAX6479BL28BD3 MAX6479BL30AD3 MAX6479BL33BD3 MARK
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Table Standard Versions (continued)
DEVICE MAX6480BL15BD3 MAX6480BL18AD3 MAX6480BL25BD3 MAX6480BL28AD3 MAX6480BL30BD3 MAX6480BL33AD3 MAX6481BL15BD3 MAX6481BL18AD3 MAX6481BL25BD3 MAX6481BL28AD3 MAX6481BL30BD3 MAX6481BL33AD3 MAX6482BL15BD3 MAX6482BL18AD3 MAX6482BL25BD3 MARK DEVICE MAX6482BL28AD3 MAX6482BL30BD3 MAX6482BL33AD3 MAX6483BL15BD3 MAX6483BL18AD3 MAX6483BL25BD3 MAX6483BL28AD3 MAX6483BL30BD3 MAX6483BL33AD3 MAX6484BL15BD3 MAX6484BL18AD3 MAX6484BL25BD3 MAX6484BL28AD3 MAX6484BL30BD3 MAX6484BL33AD3 MARK
Sample stock generally available standard versions only. Standard versions require minimum order increment 2.5k units. Nonstandard versions must ordered 10k-unit increments. Contact factory availability.
300mA Linear Regulators with Internal Microprocessor Reset Circuit
Configurations
VIEW
RESET
MAX6469-MAX6484
MAX6469 MAX6470
MAX6471 MAX6472
SHDN
RESET
MAX6469 MAX6470
RESET
SOT23-6
SHDN
SOT23-6
TDFN
RESET
RESET
MAX6473 MAX6474
MAX6471 MAX6472
SHDN
RESET
MAX6473 MAX6474
SOT23-6
SHDN
TDFN
TDFN
RESET
MAX6475 MAX6476
SHDN
RESET
MAX6475 MAX6476
SOT23-6
SHDN
TDFN
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Configurations (continued)
VIEW
SHDN
SHDN
MAX6477 MAX6478
RESET
MAX6481 MAX6482
RESET
UCSP
UCSP
SHDN
MAX6479 MAX6480
RESET
MAX6483 MAX6484
RESET
UCSP
UCSP
UCSP DEVICES SHOWN MOUNTED BOARD. BALL SOLDERED DOWN.
300mA Linear Regulators with Internal Microprocessor Reset Circuit
Functional Diagrams
THERMAL SENSOR
SHDN* REVERSE LEAKAGE PROTECTION THERMAL SENSOR
MAX6469-MAX6484
SHDN
REVERSE LEAKAGE PROTECTION
DRIVER WITH CURRENT LIMIT
DRIVER WITH CURRENT LIMIT ERROR
ERROR SET** FEEDBACK-MODE COMPARATOR
1.23V
1.23V
MAX6475/MAX6476 MAX6483/MAX6484
185mV
RESET TIMEOUT
OUTPUT STAGE
RESET
RESET TIMEOUT
OUTPUT STAGE
RESET
RESET COMPARATOR
MAX6469-MAX6474 MAX6477-MAX6482
MR***
RESET COMPARATOR
Typical Operating Circuit
2.5V 5.5V
Chip Information
TRANSISTOR COUNT: 1041 PROCESS: BiCMOS
SHDN 3.3µF
MAX6469/MAX6470 MAX6477/MAX6478
RESET
RESET
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Ordering Information (continued)
PART MAX6471UT_ _D_-T MAX6471TA_ _D_-T* MAX6472UT_ _D_-T MAX6472TA_ _D_-T* MAX6473UT_ _D_-T MAX6473TA_ _D_-T* MAX6474UT_ _D_-T MAX6474TA_ _D_-T* MAX6475UT_ _D_-T MAX6475TA_ _D_-T* TEMP RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PINPACKAGE SOT23-6 TDFN-8 SOT23-6 TDFN-8 SOT23-6 TDFN-8 SOT23-6 TDFN-8 SOT23-6 TDFN-8 PART MAX6476UT_ _D_-T MAX6476TA_ _D_-T* MAX6477BL_ _D_-T MAX6478BL_ _D_-T MAX6479BL_ _D_-T MAX6480BL_ _D_-T MAX6481BL_ _D_-T MAX6482BL_ _D_-T MAX6483BL_ _D_-T MAX6484BL_ _D_-T TEMP RANGE -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C PINPACKAGE SOT23-6 TDFN-8 UCSP-6 UCSP-6 UCSP-6 UCSP-6 UCSP-6 UCSP-6 UCSP-6 UCSP-6
*Future product-contact factory availability. Note: first _"are placeholders output voltage levels devices. Desired output voltages suffix found Output Voltage Suffix Guide (Table third placeholder reset threshold accuracy. Desired reset threshold accuracy suffix found Reset Threshold Accuracy Guide (Table following placeholder reset timeout delay time. Desired reset timeout delay time suffix found Reset Timeout Delay Guide (Table example, MAX6481BL30BD4-T 3.0V output voltage, 12.5% reset threshold tolerance, 1200ms (min) reset timeout delay. Sample stock generally available standard versions only (Table Standard versions require minimum order increment 2.5k units. Nonstandard versions must ordered 10k-unit increments. Contact factory availability.
Selector Guide
PART MAX6469 MAX6470 MAX6471 MAX6472 MAX6473 MAX6474 MAX6475 MAX6476 MAX6477 MAX6478 MAX6479 MAX6480 MAX6481 MAX6482 MAX6483 MAX6484 SHDN PUSH-PULL RESET OPEN-DRAIN RESET PACKAGE SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN SOT23-6/8-TDFN UCSP B9-3 UCSP B9-3 UCSP B9-3 UCSP B9-3 UCSP B9-3 UCSP B9-3 UCSP B9-3 UCSP B9-3
300mA Linear Regulators with Internal Microprocessor Reset Circuit
Package Information
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
MAX6469-MAX6484
PACKAGE OUTLINE, BODY
21-0058
6LSOT.EPS
PACKAGE OUTLINE, UCSP 21-0093
9LUCSP, 3x3.EPS
300mA Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Package Information (continued)
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
&10L, THIN.EPS
0.35x0.35
INDEX AREA
DETAIL
[(N/2)-1] REF.
PACKAGE OUTLINE, 6,8,10 14L, TDFN, EXPOSED PAD, 3x3x0.80
-DRAWING SCALE-
21-0137
COMMON DIMENSIONS SYMBOL MIN. 0.70 2.90 2.90 0.00 MAX. 0.80 3.10 3.10 0.05
0.20 0.40 0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T633-2 T833-1 T833-2 T833-3 T1033-1 T1433-1 T1433-2 1.50±0.10 1.50±0.10 1.50±0.10 1.50±0.10 1.50±0.10 1.50±0.10 1.70±0.10 1.70±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 0.95 0.95 0.65 0.65 0.65 0.50 0.40 0.40 JEDEC SPEC MO229 WEEA MO229 WEEA MO229 WEEC MO229 WEEC MO229 WEEC MO229 WEED-3 0.40±0.05 0.40±0.05 0.30±0.05 0.30±0.05 0.30±0.05 0.25±0.05 0.20±0.05 0.20±0.05 [(N/2)-1] 1.90 1.90 1.95 1.95 1.95 2.00 2.40 2.40
DOWNBONDS ALLOWED
PACKAGE OUTLINE, 6,8,10 14L, TDFN, EXPOSED PAD, 3x3x0.80
-DRAWING SCALE-
21-0137
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2005 Maxim Integrated Products Printed registered trademark Maxim Integrated Products, Inc.

300mA Linear Regulators with Internal Microprocessor Reset Circuit

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