MAX16910CATA

19-4816; Rev 2; 7/11 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator General Description The MAX16910 ultra-low quiescent current, high-voltage linear regulator is ideal for use in automotive and batteryoperated systems. The device operates from a +3.5V to +30V input voltage, delivers up to 200mA of load current, and consumes only 20µA of quiescent current at no load. The device consumes only 1.6µA current when in shutdown. The input is +45V transient tolerant and is designed to operate under load-dump conditions. The MAX16910 can be configured as either fixed output voltage (+3.3V or +5V) or adjustable output voltage using an external resistive divider. The MAX16910 features an open-drain, active-low RESET output with fixed thresholds offered at 92.5% and 87.5% of the output voltage. The RESET output remains low for a fixed period of 60µs after the output voltage exceeds its threshold. The RESET delay can be extended with an external capacitor. The MAX16910 includes an enable input, short-circuit protection, and thermal shutdown. The MAX16910 operates over the -40°C to +125°C automotive temperature range. The device is available in a space-saving, thermally enhanced, 3mm x 3mm, 8-pin TDFN package and 5mm x 4mm, 8-pin SO package. S Low_20µA_Quiescent_Current S +3.5V_to_+30V_Wide_Input_Voltage_Range,_+45V_ Tolerant S Operates_Through_Cold-Crank_Conditions S Low-Dropout_Voltage_of_280mV_at_200mA S Up_to_200mA_Output_Current_Capability S Stable_Operation_with_Tiny_4.7µF_Output_Capacitor S User-Selectable_Output_Voltage +3.3V_or_+5V_Fixed +1.5V_to_+11V_Adjustable_with_External Features MAX16910 ____Resistive_Divider S Open-Drain_RESET_Output_with_Adjustable_Delay S Fixed-Reset_Threshold_Options:_87.5%_or_92.5% S High-Voltage_Enable_Input_(+45V) S Thermal_and_Short-Circuit_Protection S Operating_-40°C_to_+125°C_Temperature_Range S Operating_-40°C_to_+150°C_(TJ)_Temperature_ Range S Automotive_Qualified Applications Automotive Industrial Telecom PART MAX16910CATA_/V+ MAX16910CASA_/V+ 5V FIXED OUTPUT IN 1µF ENABLE + 14V BATTERY OUT SETOV 4.7µF 10kI VCC µC I/O RESET Ordering Information IOUT (mA) TEMP RANGE_(TA) -40NC to +125NC -40NC to +125NC PINPACKAGE 8 TDFN-EP* (3mm x 3mm) 8 SO-EP* (5mm x 4mm) Typical Operating Circuits 200 200 MAX16910 SET GND RESET TIMEOUT 1nF (1.25ms DELAY) Insert the desired suffix numbers (from the Selector Guide) into the blank “_” to indicate reset threshold. +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. *EP = Exposed pad. Typical Operating Circuits continued on next page. ________________________________________________________________ _Maxim Integrated Products_ _ 1 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. 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 Typical Operating Circuits (continued) 3.3V FIXED OUTPUT IN 1µF ENABLE + 14V BATTERY MAX16910 SETOV SET GND TIMEOUT 1nF (1.25ms DELAY) RESET 4.7µF 10kI OUT VCC µC I/O RESET ADJUSTABLE OUTPUT IN 1µF ENABLE + 14V BATTERY SET GND TIMEOUT MAX16910 SETOV R2 4.7µF 10kI OUT R1 VCC µC I/O RESET RESET 1nF (1.25ms DELAY) 2_ _ _______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator Pin Configurations MAX16910 TIMEOUT TOP VIEW SETOV GND OUT TOP VIEW 8 7 6 5 IN ENABLE 1 2 3 + MAX16910 *EP 8 7 6 5 OUT GND SETOV TIMEOUT MAX16910 + 1 IN 2 ENABLE 3 SET *EP 4 RESET SET RESET 4 SO *CONNECT EXPOSED PAD TO GND. TDFN *CONNECT EXPOSED PAD TO GND. _______________________________________________________________________________________ _ _ 3 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 ABSOLUTE_MAXIMUM_RATINGS (All voltages referenced to GND.) IN, ENABLE, SET.................................................. -0.3V to +45V OUT, RESET (open-drain output)............................-0.3V to +12V SETOV, TIMEOUT....................................................-0.3V to +6V Maximum Current (all pins except IN and OUT)...............50mA Continuous Power Dissipation (TA = +70°C) TDFN (derate 24.4mW/°C above +70°C)*.............1951mW SO (derate 23.3mW/°C above +70°C)*................1861mW *As per JEDEC51 Standard (multilayer board). Operating Temperature Range..........................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range..............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C Soldering Temperature (reflow) ......................................+260°C PACKAGE_THERMAL_CHARACTERISTICS_(Note_1) TDFN Junction-to-Ambient Thermal Resistance (qJA) ........... 41°C/W Junction-to-Case Thermal Resistance (qJC).................. 8°C/W SO Junction-to-Ambient Thermal Resistance (qJA) ........... 43°C/W Junction-to-Case Thermal Resistance (qJC).................. 7°C/W Note_1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL_CHARACTERISTICS_ (VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P +150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2) PARAMETER Supply Voltage Range Supply Current Shutdown Supply Current ISHDN SYMBOL VIN Continuous For P 400ms ILOAD = 0mA, SET = GND, VOUT = 5V ENABLE = GND, TA = +25NC ENABLE = GND, -40NC P TA P +125NC 1mA P ILOAD P 200mA, VIN = 6V to 30V (Note 3) 1mA P ILOAD P 50mA, VIN = 6V to 30V, TJ = +150°C (Notes 3, 4) 1mA P ILOAD P 200mA, VIN = 4.8V to 30V (Note 3) 1mA P ILOAD P 50mA, VIN = 4.8V to 30V, TJ = +150°C (Notes 3, 4) ILOAD = 1mA (Note 4) ILOAD = 200mA, SET = GND, SETOV = HIGH, VOUT(NORM) = +5.0V Dropout Voltage (Note 5) DVDO ILOAD = 50mA, SET = GND, SETOV = HIGH, VOUT(NORM) = +5.0V, TJ = +150°C (Notes 3, 4) 4.9 4.9 3.234 3.234 1.5 1.225 1.25 280 20 1.6 3 5.0 5.0 3.3 3.3 5.1 V 5.1 3.366 V 3.366 11.0 1.275 600 mV 600 V V CONDITIONS MIN 3.5 TYP MAX 30 45 30 3 UNITS V FA FA Output Voltage (5V Fixed Output Setting) VOUT50 Output Voltage (3.3V Fixed Output Setting) Adjustable Output-Voltage Range SETOV FB Voltage VOUT33 VOUT VSETOV 4_ _ _______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator ELECTRICAL_CHARACTERISTICS_(continued) PARAMETER Short-Circuit Output Current Limit Thermal Shutdown Thermal Shutdown Hysteresis Line Regulation (5V Fixed Output Setting) Line Regulation (3.3V Fixed Output Setting) Load Regulation (5V Fixed Output Setting) Load Regulation (3.3V Fixed Output Setting) Power-Supply Rejection Ratio Startup Response Time TIMEOUT_INPUT TIMEOUT Ramp Current TIMEOUT Ramp Delay RESET Default Timeout Period RESET_OUTPUT RESET Threshold RESET Threshold Hysteresis OUT to RESET Delay RESET Output-Voltage Low (Open-Drain) RESET Open-Drain Leakage Current RESET Open-Drain Leakage Current ENABLE ENABLE Logic-Low ENABLE Logic-High ENABLE Pulldown Current SET_INPUT SET Input Current (All Modes) SET Logic-Low Set Logic-High VILSET VIHSET 2.4 TA = +25NC TJ = +150NC -50 0.2 0.4 +50 nA FA V V VIL VIH (Note 7) 2.4 0.65 0.4 V V FA VOL VOUT rising, TIMEOUT = OPEN MAX16910__9/V+, VOUT falling MAX16910__8/V+, VOUT falling VOUT rising VOUT falling (Note 6) ISINK = 0.5mA, RESET asserted RESET not asserted, RESET = 7V, TA = +25NC RESET not asserted, RESET = 7V 0.03 30 90 85 ITO TIMEOUT connected to GND 0.600 1.0 1.25 60 92.5 87.5 5 4 0.4 1 90 94 89 1.650 FA ms/nF Fs % of VOUT % of VOUT Fs V FA FA PSRR tSTART SYMBOL ISC (Note 6) (Note 6) VIN = 6V to 30V, ILOAD = 1mA VIN = 4.8V to 30V, ILOAD = 1mA ILOAD = 1mA to 200mA ILOAD = 1mA to 200mA ILOAD = 10mA, f = 100Hz, 500mVP-P (Note 6) Rising edge of VIN to VOUT, ILOAD = 50mA (Note 6) MAX16910 (VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P +150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2) CONDITIONS Output shorted to GND (MAX16910C__) MIN 230 TYP 330 +180 +25 1 1 12 12 60 160 MAX UNITS mA NC NC mV mV mV mV dB Fs _______________________________________________________________________________________ _ _ 5 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 ELECTRICAL_CHARACTERISTICS_(continued) (VIN = VENABLE = +14V, CTIMEOUT = open, CIN = 1µF, COUT = 4.7µF, unless otherwise noted. TA = -40°C to +125°C, TA P TJ P +150°C, unless otherwise noted. Typical values are TA = +25°C.) (Note 2) PARAMETER SETOV_INPUT_(TRI-MODE) SETOV Input Leakage Current SETOV Low-Level Input Voltage SETOV High-Level Input Voltage VILSETOV VIHSETOV SYMBOL CONDITIONS SET = HIGH, VSETOV = 5V or SET = GND, VSETOV = 5V SET = GND, VSETOV < VILSETOV or places device in +3.3V fixed output-voltage mode SET = GND, VSETOV > VIHSETOV or places device in +5V fixed output-voltage mode VOUT - 0.4 MIN TYP 1 0.4 MAX UNITS FA V V Note_2:__ roduction tested at TA = +25°C. Overtemperature limits are guaranteed by ATE characterization between -40°C P TJ ≤ P +150°C, unless otherwise noted. Note_3: Observe the absolute maximum power dissipation limits. Note_4: Specification characterized up to +150°C operating junction temperature. Limits are guaranteed by bench characterization. Note_5: Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT for VIN = VOUT + 3V. Note_6: Not production tested. Note_7: ENABLE is internally pulled to GND. 6_ _ _______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator Typical Operating Characteristics (VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX16910 toc01 MAX16910 GROUND CURRENT vs. LOAD CURRENT VOUT = 3.3V 60 TA = -40NC IGND (FA) TA = +125NC TA = +25NC MAX16910 toc02 SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX16910 toc03 30 ILOAD = 0 27 24 21 18 15 0 5 10 15 VIN (V) 20 25 80 10 8 6 4 IIN (FA) 40 20 IIN (FA) 2 0 0 20 40 60 80 100 120 140 160 180 200 ILOAD (mA) 0 5 10 15 VIN (V) 20 25 30 30 0 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE MAX16910 toc04 RESET THRESHOLD vs. TEMPERATURE MAX16910 toc05 DROPOUT VOLTAGE vs. LOAD CURRENT (5V OUTPUT) 0.45 0.40 DROPOUT VOLTAGE (V) TA = +150NC TA = +125NC TA = +25NC TA = -40NC MAX16910 toc06 10 8 6 VIN = 30V 4 2 0 -50 -25 0 25 50 75 VIN = 14V VIN = 6V 5.5 VOUT = 5V RESET THRESHOLD VOLTAGE (V) 5.2 4.9 4.6 MAX16910_8/V RISING 4.3 MAX16910_8/V FALLING 4.0 -50 -25 0 25 50 75 MAX16910_9/V RISING MAX16910_9/V FALLING 0.50 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 IIN (FA) 100 125 150 100 125 150 0 20 40 60 80 100 120 140 160 180 200 LOAD CURRENT (mA) TEMPERATURE (NC) TEMPERATURE (NC) _______________________________________________________________________________________ _ _ 7 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 Typical Operating Characteristics (continued) (VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.) DROPOUT VOLTAGE vs. LOAD CURRENT (3.3V OUTPUT) MAX16910 toc07 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE MAX16910 toc08 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE 5.0 4.5 4.0 3.5 VOUT (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 40 0 5 10 15 20 VIN (V) ILOAD = 0mA SETOV = OUT SET = GND 25 30 35 40 MAX16910 toc09 0.50 0.45 0.40 DROPOUT VOLTAGE (V) 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 0 TA = -40NC TA = +150NC TA = +125NC TA = +25NC 3.5 3.0 2.5 VOUT (V) 2.0 1.5 1.0 0.5 0 0 5 10 15 20 VIN (V) 25 30 35 ILOAD = 0mA SETOV = GND SET = GND 5.5 20 40 60 80 100 120 140 160 180 200 LOAD CURRENT (mA) OUTPUT VOLTAGE vs. TEMPERATURE 5.04 5.03 OUTPUT VOLTAGE (V) 5.02 5.01 5.00 4.99 4.98 4.97 4.96 4.95 -40 0 40 80 120 TEMPERATURE (°C) RESET TIMEOUT PERIOD vs. TEMPERATURE MAX16910 toc11 MAX16910 toc10 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -10 -20 PSRR (dB) -30 -40 -50 -60 ILOAD = 10mA VIN = 14V + 0.5VP-P MAX16910 toc12 5.05 IOUT = 10mA 60 55 TIMEOUT PERIOD (Fs) 50 45 40 35 30 25 20 -50 -25 0 25 50 75 CTIMEOUT UNCONNECTED 0 100 125 150 -70 0.01 0.1 1 10 100 1000 FREQUENCY (kHz) TEMPERATURE (NC) 8_ _ _______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator Typical Operating Characteristics (continued) (VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.) RESET OUTPUT VOLTAGE vs. SINK CURRENT MAX16910 toc13 MAX16910 RESET TIMEOUT PERIOD vs. TIMEOUT CAPACITANCE MAX16910 toc14 1.5 1.2 0.9 0.6 0.3 0 0.001 1000 RESET OUTPUT VOLTAGE (V) TIMEOUT PERIOD (ms) 100 10 1 0.1 0.01 0.1 1 10 0.01 0.1 1 CTIMEOUT (nF) 10 100 RESET SINK CURRENT (mA) LOAD-TRANSIENT RESPONSE (5V OUTPUT) LOAD-TRANSIENT RESPONSE (3V OUTPUT) MAX16910 toc15 MAX16910 toc16 LINE-TRANSIENT RESPONSE (5V OUTPUT) MAX16910 toc17 VOUT (AC-COUPLED) 100mV/div 180mA IOUT 10mA VOUT (AC-COUPLED) 100mV/div 180mA IOUT 10mA VOUT (AC-COUPLED) 200mV/div 28V VIN 6V 200Fs/div 200Fs/div 2ms/div LINE-TRANSIENT RESPONSE (3.3V OUTPUT) MAX16910 toc18 POWER-UP RESPONSE MAX16910 toc19 POWER-UP RESPONSE MAX16910 toc20 IOUT = 0A VIN = VEN VOUT (AC-COUPLED) 200mV/div 28V VIN 4.8V 14V VIN 14V VIN 0V 3.3V VOUT 0V 3.3V VOUT 0V 170mA IOUT 0V IOUT = 170mA VEN = VIN 40Fs/div 0A 2ms/div 40Fs/div _______________________________________________________________________________________ _ _ 9 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 Typical Operating Characteristics (continued) (VIN = VEN = +14V, CIN = 1µF, COUT = 4.7µF ceramic, TA = +25°C, unless otherwise noted.) ENABLE STARTUP RESPONSE MAX16910 toc21 ENABLE STARTUP RESPONSE MAX16910 toc22 LOAD-DUMP TRANSIENT RESPONSE MAX16910 toc23 5V VIN 0V 3.3V VOUT 0A 5V VEN 0V 3.3V VOUT 0V 175mA IOUT 0A VOUT (AC-COUPLED) 100mV/div 42V VIN 14V 40Fs/div 40Fs/div 100ms/div Pin Description PIN 1 2 NAME IN ENABLE FUNCTION Regulator Input. Bypass IN to GND with a 1FF (min) low-ESR ceramic capacitor. Active-High Enable Input. Force ENABLE high (or connect to IN) to turn the regulator on. Pull ENABLE low (or leave unconnected) to place the device in a low-power shutdown mode. ENABLE is internally pulled down to GND through a 0.65FA current sink. Feedback Network Selector. Connect SET to GND when operating the MAX16910 in fixed outputvoltage mode (3.3V or 5V) using the internal feedback network. Connect SET to IN or any voltage higher than 2.4V when an external feedback network (resistive divider) is used, operating the MAX16910 in adjustable output-voltage mode. Active-Low, Open-Drain Reset Output. RESET asserts low when OUT is below the reset threshold, and remains low for the duration of the reset timeout period after the reset conditions end. RESET also asserts low when ENABLE is low and during thermal shutdown. Reset-Timeout-Period Adjust Input. Internal capacitance produces a 60Fs default delay when TIMEOUT is left unconnected. Connect a capacitor from TIMEOUT to GND to set a longer timeout period than default. Regulated Output-Voltage Selector. Connect SETOV to OUT for a 5V fixed output, or connect SETOV to GND for a 3.3V fixed output. SETOV becomes the feedback path when using an external resistive divider for an adjustable output. Ground Regulator Output. Bypass OUT to GND with a minimum of 4.7FF. Use a low-ESR, ceramic capacitor (X7R, X5R) for optimal performance. The SETOV input controls the output voltage when in fixed +3.3V or fixed +5V output-voltage mode. Using an external resistive divider between OUT and SETOV sets adjustable output voltage from +1.5V to +11V. Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to provide a low thermal-resistance path from the thermal junction to the PCB. Do not use EP as the only electrical connection to GND. 3 SET 4 RESET 5 TIMEOUT 6 7 SETOV GND 8 OUT — EP 10_ _ ______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator Functional Diagram MAX16910 IN OUT ENABLE CONTROL LOGIC OVERCURRENT PROTECTION THERMAL PROTECTION OUTPUTVOLTAGE SELECT MUX RESET TIMEOUT SET SETOV RESET TIMEOUT 1.253V 1.156V (92.5%) or 1.094V (87.5%) MAX16910 GND _______________Detailed Description The MAX16910 low-quiescent current, high-voltage linear regulator is ideal for use in automotive and batteryoperated systems. The device operates from an input voltage of +3.5V to +30V, delivers up to 200mA of load current, and consumes only 20µA of quiescent current at no load. The input is +45V tolerant and is designed to operate under load-dump conditions. The MAX16910 can be user configured as either a fixed output voltage (+3.3V or +5V) or an adjustable output voltage using an external resistive divider. The MAX16910 features an open-drain, active-low RESET output with fixed thresholds offered at 92.5% and 87.5% of the output voltage. The RESET output remains low for a fixed period of 60µs after the output voltage exceeds its threshold. The RESET delay can be extended with an external capacitor. The MAX16910 includes an enable input short-circuit protection and thermal shutdown. The SET and SETOV inputs determine the output mode. For the 5V fixed output-voltage mode (see the 5V fixed output circuit in the Typical Operating Circuits), connect SET to GND and SETOV to OUT. For the 3.3V fixed output-voltage mode (see the 3.3V fixed output circuit in the Typical Operating Circuits) connect SET to GND and SETOV to GND. Fixed Output-Voltage Mode For the adjustable output-voltage mode (see the adjustable output circuit in the Typical Operating Circuits), connect SET to IN or a voltage > 2.4V and connect SETOV to a resistive divider R1 and R2 between OUT and GND. An output voltage between 1.5V and 11V can be selected using the following equation: VOUT = VSETOV x (1 + R1/R2) where VSETOV = 1.25V and R2 should be less than or equal to 100kω. Adjustable Output-Voltage Mode ______________________________________________________________________________________ _ _ 11 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 ENABLE is an active-high, logic-level enable input that turns the device on or off. Drive ENABLE high to turn the device on. An internal 0.65µA pulldown current keeps the MAX16910 in shutdown mode when driven by a three-state driver in high-impedance mode, or an open-drain driver. When in shutdown, the MAX16910 consumes only 1.6µA. ENABLE withstands voltages up to 45V, allowing it to be driven by high-input level voltages or connected to IN for always-on operation. The MAX16910 features thermal protection. When the junction temperature exceeds +180°C, an internal thermal sensor turns off the pass transistor, and allows the device to cool. The thermal sensor turns on the pass transistor again after the junction temperature cools by 25°C. This results in a cycled output during continuous thermal-overload conditions. Thermal protection protects the MAX16910 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature rating of +150°C. The MAX16910 features a 330mA current limit. The output can be shorted to GND continuously without damage to the device. During a short circuit, the power dissipated across the pass transistor can quickly heat the device. When the die temperature reaches +180°C, the MAX16910 turns off the pass transistor and automatically restarts after the die temperature has cooled by 25°C. The MAX16910 features an active-low, open-drain reset output. Once the monitored output voltage exceeds the reset threshold voltage, RESET remains low for the reset timeout period and then goes high. RESET changes from high to low whenever the monitored output voltage drops below the reset threshold voltage. RESET also asserts low when ENABLE is low and during thermal shutdown. The MAX16910 features a reset timeout period adjustable input. The internal capacitance produces a 60µs default delay when TIMEOUT is left unconnected. Connect a capacitor from TIMEOUT to GND to set a higher timeout period than default. Use the following formula to determine the reset timeout capacitor: CTIMEOUT = 0.8 x ITO x TTIMEOUT ENABLE where CTIMEOUT is in nF, ITO is in µA, and TTIMEOUT is in ms. For example, if ITO is 1µA, CTIMEOUT needs to be 8nF to get a 10ms delay. ___________Applications Information Output-Capacitor Selection and Regulator Stability Thermal Protection For stable operation over the full temperature range, with fixed 3.3V and 5.0V output voltages, use a low-ESR 4.7µF capacitor. For resistor-programmed output voltages, a 10µF low-ESR ceramic capacitor is recommended for stable operation. Use larger output-capacitor values such as 22µF to reduce noise, improve load-transient response and power-supply rejection. Some ceramic dielectrics exhibit large capacitance and ESR variations with temperature. To improve power-supply rejection and transient response, use a capacitor larger than the minimum 1µF capacitor between IN and GND. The MAX16910 provides up to 200mA of continuous output current. The input voltage range extends to 30V. Package power dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. Figure 1 shows the maximum allowable power dissipation for these devices to keep the junction temperature below +150°C. Figure 1 assumes that the exposed metal pad of the MAX16910 is soldered to a 1in2 of multilayer copper board. Use Figure 1 to determine the allowable package dissipation for a given ambient temperature. Alternately, use the following formulas to calculate the allowable power dissipation PD. For the TDFN-EP package:   1.951W for TA ≤ +70°C   PD =   W  1.951W − 0.0244 °C × ( TA − 70°C) for + 70°C ≤ TA < +125°C   Available Output-Current Calculation Output Short-Circuit Current Limit RESET Output Timeout For the SO-EP package:   1.861W for TA ≤ +70°C   PD =   W  1.861W − 0.0233 °C × ( TA − 70°C) for + 70°C ≤ TA < +125°C   12_ _ ______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator After determining the allowable power dissipation, calculate the maximum allowable output current, without exceeding the +150°C junction temperature, using the following formula: The reset timeout period is adjustable to accommodate a variety of microprocessor applications. Adjust the reset timeout period by connecting a capacitor between TIMEOUT and GND. Selecting Timeout Capacitor MAX16910 IOUT(MAX) = PD VIN − VOUT t RP = The above equations do not include the negligible power dissipation from self-heating due to the device ground current. Example 1 (TDFN-EP Package): TA = +125°C, VIN = 16V, VOUT = 3.3V Calculate the maximum allowable power dissipation at the given temperature as follows: 1.25 × C TIMEOUT I TO where tRP is in ms and CTIMEOUT is in nF. Leave TIMEOUT unconnected to select the internally fixed timeout period. CTIMEOUT must be a low-leakage (< 10nA) type capacitor. Ceramic capacitors are recommended; do not use capacitor values lower than 100pF to avoid the influence of parasitic capacitances. The MAX16910 package features an exposed thermal pad on its underside that should be used as a heatsink. This pad lowers the package’s thermal resistance by providing a direct heat-conduction path from the die to the PCB. Connect the exposed pad and GND to the system ground using a large pad or ground plane, or multiple vias to the ground plane layer. Exposed Pad W PD = 1.951W − 0.0244 × (125°C − 70°C) = 609mW °C And establish the maximum output current: I OUT(MAX) = 609mW ≅ 48mA 16V − 3.3V Example 2 (TDFN-EP Package): TA = +50°C, VIN = 9V, VOUT = 5V Calculate the maximum allowable power dissipation at the given temperature as follows: PD = 1.951W PD (W) 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 DERATE 23.3mW/°C 1.861W 8-PIN SO-EP 1.951W 8-PIN TDFN-EP Find the maximum output current: IOUT(MAX) = 1.951W = 488mA ⇒ IOUT(MAX) = ISC = 330mA (typ) 9V − 5V DERATE 24.4mW/°C In Example 2, the maximum output current is calculated as 488mA. The allowable output current cannot exceed the given internal current limit for the device of 330mA (typ). 0.6 0.4 0.2 0 0 20 40 60 80 100 120 140 TEMPERATURE (°C) Figure 1. Calculated Maximum Power Dissipation vs. Ambient Temperature ______________________________________________________________________________________ _ _ 13 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator MAX16910 ________________________________________________________________Selector Guide PART MAX16910CATA8/V+ MAX16910CATA9/V+ MAX16910CASA8/V+ MAX16910CASA9/V+ RESET THRESHOLD_(%) 87.5 92.5 87.5 92.5 IOUT_(mA) 200 200 200 200 PIN-PACKAGE 8 TDFN-EP* (3mm x 3mm) 8 TDFN-EP* (3mm x 3mm) 8 SO-EP* (5mm x 4mm) 8 SO-EP* (5mm x 4mm) +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. *EP = Exposed pad. __________________________Chip PROCESS: BiCMOS DMOS Information Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE_ TYPE 8 TDFN-EP 8 SO-EP PACKAGE_ CODE T833+2 S8E+12 OUTLINE_ NO. 21-0137 21-0111 LAND_ PATTERN_NO. 90-0059 90-0150 14_ _ ______________________________________________________________________________________ 200mA, Automotive, Ultra-Low Quiescent Current, Linear Regulator Revision History REVISION_ NUMBER 0 REVISION_ DATE 7/09 Initial release Added a junction temperature range of -40°C to +150°C in the Features section, updated Electrical Characteristics table with +150°C junction temperature in “5V Output Voltage,” “3.3V Output Voltage,” and “Dropout Voltage” parameters, added new Note 4, updated TOC 10 and Figure 1 Removed the typ value from the “Dropout Voltage” ILOAD = 50mA parameter in the Electrical Characteristics table DESCRIPTION PAGES CHANGED — MAX16910 1 10/10 1, 4, 5, 6, 8, 13 2 7/11 4 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 © 15 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.