MAX15007

19-0663; Rev 5; 11/11 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO General Description The MAX15006/MAX15007 ultra-low quiescent-current linear regulators are ideal for use in automotive and battery-operated systems. These devices operate from an input voltage of 4V to 40V, deliver up to 50mA of output current, and consume only 10μA of quiescent current at no load. The internal p-channel pass device keeps the quiescent current low even at full load. The MAX15007 consumes only 3μA current when in shutdown. The MAX15006A/MAX15007A have a fixed 3.3V output while the MAX15006B/MAX15007B have a fixed 5V output voltage. The MAX15006C/MAX15007C feature an adjustable output from 1.8V to 10V. The MAX15007 includes an enable input to turn the device on or off. All devices are short-circuit protected and include thermal shutdown. The MAX15006/MAX15007 operate over the -40°C to +125°C automotive temperature range. These devices are available in space-saving 3mm x 3mm 6-pin TDFN and 8-pin SO thermally enhanced packages. Features ♦ Wide Operating Input Voltage Range (4V to 40V) ♦ Guaranteed 50mA Output Current ♦ Low Quiescent Current 10µA (No Load) and 90µA (Full Load) ♦ Operates Through Cold-Crank Condition ♦ Withstands 45V Load Dump ♦ Low Dropout Voltage of 300mV (MAX15006B/MAX15007B) ♦ Stable Operation with Tiny 2.2µF Output Capacitor ♦ Enable Input (MAX15007) ♦ Preset 3.3V and 5.0V Output Voltages ♦ 1.8V to 10V Adjustable Output (MAX15006C/ MAX15007C) ♦ Thermal and Short-Circuit Protection ♦ -40°C to +125°C Operating Temperature Range ♦ Thermally Enhanced 3mm x 3mm 6-Pin TDFN/ 8-Pin SO Packages MAX15006/MAX15007 Ordering Information Applications Automotive Tire-Pressure Monitoring Industrial Telecom Networking PART MAX15006 AASA+ MAX15006AATT+ TEMP RANGE PINPACKAGE TOP MARK — — APE AUR -40°C to +125°C 8 SO-EP* -40°C to +125°C 6 TDFN-EP* MAX15006AASA/V+ -40°C to +125°C 8 SO-EP* MAX15006AATT/V+ -40°C to +125°C 6 TDFN-EP* Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. *EP = Exposed pad. Pin Configurations TOP VIEW OUT OUT (FB) 6 5 GND 4 MAX15006A MAX15006B MAX15006C IN 1 + 8 7 6 EP 5 OUT N.C. (FB) N.C. GND MAX15006A MAX15006B MAX15006C + 1 IN 2 IN EP 3 N.C. N.C. 2 N.C. 3 N.C. 4 SO TDFN Pin Configurations continued at end of data sheet. ( ) FOR MAX15006C ONLY. ________________________________________________________________ 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. 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +45V EN to GND..............................................................-0.3V to +45V OUT, FB to GND.....................................................-0.3V to +12V OUT Short-Circuit Duration ........................................Continuous Maximum Current Into Any Pin (except IN and OUT) ......±50mA Continuous Power Dissipation (TA = +70°C) TDFN (derate 23.8mW/°C above +70°C) ........................1904mW SO (derate 23.3mW/°C above +70°C)..........................1860mW 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 (θJA) ...........42°C/W Junction-to-Case Thermal Resistance (θJC) ...............8.5°C/W SO Junction-to-Ambient Thermal Resistance (θJA) ...........43°C/W Junction-to-Case Thermal Resistance (θJC) ..................7°C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer 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 = 14V, IOUT = 1mA, CIN = 0.1μF, COUT = 2.2μF, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 2) PARAMETER Input Voltage Range SYMBOL VIN I OUT = 0 A (MAX15006A/B) I OUT = 0 A (MAX15006C) I OUT = 0 A (MAX15007A/B) I OUT = 0 A (MAX15007C) I OUT = 1 00μA (MAX15006A/B) I OUT = 1 00μA (MAX15006C) Ground Current I GND Regulator on, measured at GND I OUT = 1 00μA (MAX15007A/B) I OUT = 1 00μA (MAX15007C) I OUT = 1 mA (MAX15006A/B) I OUT = 1 mA (MAX15006C) I OUT = 1 mA (MAX15007A/B) I OUT = 1 mA (MAX15007C) I OUT = 5 0mA (MAX15006) I OUT = 5 0mA (MAX15007) Shutdown Supply Current I SHDN Regulator off (MAX15007 only) CONDITIONS MIN 4 10 8 11 9 10.5 8.5 11.5 9.5 12 10 13 11 90 93 3 TYP MAX 40 17 15 18 16 18 16 19 17 20 18 21 19 150 150 5 μA μA UNITS V 2 _______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO ELECTRICAL CHARACTERISTICS (continued) (VIN = 14V, IOUT = 1mA, CIN = 0.1μF, COUT = 2.2μF, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 2) PARAMETER REGULATOR Guaranteed Output Current Output Voltage (Note 3) I OUT VOUT VIN VOUT + VDO M AX15006A/MAX15007A I OUT = 1mA M AX15006B/MAX15007B MAX15006C/MAX15007C I OUT = 5 mA, MAX15006B/MAX15007B I OUT = 5 mA, MAX15006C/MAX15007C Dropout Voltage (Notes 4, 5) VDO I OUT = 5 0mA, MAX15006B/MAX15007B I OUT = 5 0mA, MAX15006C/MAX15007C I OUT = 5 0mA, MAX15006A/MAX15007A L ine Regulation Load Regulation Output Current Limit Output Voltage Noise Power-Supply Rejection Ratio F B Threshold Voltage F B Input Current ENABLE LOGIC Enable Threshold Voltage Enable Threshold Hysteresis Enable Pulldown Current Enable to Regulation Time THERMAL SHUTDOWN Thermal Shutdown Thermal Shutdown Hysteresis T SHDN THYST Junction temperature rising +165 20 °C °C Internally pulled down to GND (Note 6) VIL VIH 1.4 60 0.5 0.4 2 0.4 V mV μA ms PSRR VFB IFB 100Hz to 100kHz, I OUT = 50mA, C OUT = 2.2μF VOUT = 3.3V VOUT = 5V 6V VIN 35V, I OUT = 1 mA 0.7 80 115 179 66 1.2 -100 1.23 1.26 +100 VIN = V OUT + 3V, I OUT = 100μA to 50mA 50 3.25 4.925 1.8 30 30 300 300 3.3 5.0 3.35 5.075 10 53 60 525 600 1000 0.25 1.5 350 % % mA μVRMS dB V nA mV V mA SYMBOL CONDITIONS MIN TYP MAX UNITS MAX15006/MAX15007 f = 100Hz, VIN_RIPPLE = 500mVP-P, I OUT = 50mA ILOAD = 1 mA (MAX15006C/MAX15007C only) VFB = 0V, 1.5V (MAX15006C/MAX15007C only) Limits at TA = -40°C are guaranteed by design. Output voltage regulation is guaranteed for IOUT ≥ 5μA. Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT when VIN = VOUT + 3V. For VOUT = 3.3V, the 700mV dropout indicates VOUT does not reach 2% below VOUT at VIN = VOUT + 3V at minimum 4V input voltage. Note 6: Enable to regulation time is the time the output takes to reach 95% of its final value with VIN = 14V and EN is taken from VIL to VIH in 5ns. Note 2: Note 3: Note 4: Note 5: _______________________________________________________________________________________ 3 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Typical Operating Characteristics (VIN = 14V, CIN = 0.1μF, COUT = 2.2μF, VEN = VIN, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006A/MAX15007A) MAX15006 toc01 OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006B/MAX15007B) MAX15006 toc02 OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006A/MAX15007A) 3.42 3.39 3.36 VOUT (V) 3.33 3.30 3.27 3.24 3.21 IOUT = 50mA IOUT = 1mA MAX15006 toc03 3.6 3.3 3.0 2.7 VOUT (V) 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 0 5 10 15 20 VIN (V) 25 30 35 5.5 5.0 4.5 4.0 3.5 VOUT (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 3.45 IOUT = 0 40 IOUT = 0 0 5 10 15 20 VIN (V) 25 30 35 40 3.18 3.15 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006B/MAX15007B) MAX15006 toc04 DROPOUT VOLTAGE vs. LOAD CURRENT (MAX15006B/MAX15007B) MAX15006 toc05 GROUND CURRENT vs. LOAD CURRENT (MAX15006B/MAX15007B) 90 80 70 IGND (μA) 60 50 40 30 20 10 0 TA = -40°C TA = +25°C TA = +125°C MAX15006 toc06 5.25 5.20 5.15 5.10 VOUT (V) 5.05 5.00 4.95 4.90 4.85 4.80 4.75 -50 -25 0 25 50 75 IOUT = 50mA IOUT = 1mA 500 450 400 350 VDROPOUT (mV) 300 250 200 150 100 50 0 TA = -40°C TA = +25°C TA = +125°C 100 100 125 150 0 5 10 15 20 25 30 35 40 45 50 IOUT (mA) 0 5 10 15 20 25 30 35 40 45 50 IOUT (mA) TEMPERATURE (°C) GROUND CURRENT vs. TEMPERATURE (IOUT = 0) MAX15006 toc07 GROUND CURRENT vs. TEMPERATURE (IOUT = 50mA) MAX15006 toc08 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 9 8 7 ISHDN (μA) 6 5 4 3 2 1 0 VIN = +6V VIN = +14V VIN = +40V MAX15006 toc09 18 16 14 12 IGND (μA) 10 8 6 4 2 0 -50 -25 0 25 50 75 VIN = +6V VIN = +14V VIN = +40V 100 99 98 97 IGND (μA) 96 95 94 93 92 91 90 10 100 125 150 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 4 _______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1μF, COUT = 2.2μF, VEN = VIN, TA = +25°C, unless otherwise noted.) GROUND CURRENT DISTRIBUTION (TA = -40°C) MAX15006 toc10 MAX15006/MAX15007 GROUND CURRENT DISTRIBUTION (TA = +25°C) MAX15006 toc11 GROUND CURRENT DISTRIBUTION (TA = +125°C) 24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 MAX15007, IOUT = 0 50 UNITS TESTED MAX15006 toc12 27 24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 10.4 10.5 10.6 10.7 10.8 IGND (μA) 10.9 11.0 MAX15007, IOUT = 0 50 UNITS TESTED 27 24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 10.8 10.9 11.0 11.1 11.2 IGND (μA) 11.3 11.4 MAX15007, IOUT = 0 50 UNITS TESTED 27 11.6 11.7 11.8 11.9 12.0 12.1 IGND (μA) LOAD-TRANSIENT RESPONSE (MAX15006B/MAX15007B) MAX15006 toc13 INPUT-VOLTAGE STEP RESPONSE (MAX15006B/MAX15007B, IOUT = 1mA) MAX15006 toc14 STARTUP RESPONSE MAX15006 toc15 VOUT AC-COUPLED 200mV/div 18V VIN 14V VIN 5V/div 50mA IOUT 1mA VOUT AC-COUPLED 100mV/div MAX15006B/MAX15007B IOUT = 1mA VOUT 2V/div 400μs/div 400μs/div 200μs/div ENABLE STARTUP RESPONSE MAX15006 toc16 ENABLE STARTUP RESPONSE MAX15006 toc17 ENABLE STARTUP RESPONSE MAX15006 toc18 EN 1V/div EN 1V/div EN 1V/div VOUT 2V/div MAX15006B/MAX15007B IOUT = 0 400μs/div MAX15006B/MAX15007B IOUT = 50mA 400μs/div VOUT 2V/div MAX15006B/MAX15007B VIN = 40V, IOUT = 0 400μs/div VOUT 2V/div _______________________________________________________________________________________ 5 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1μF, COUT = 2.2μF, VEN = VIN, TA = +25°C, unless otherwise noted.) ENABLE STARTUP RESPONSE MAX15006 toc19 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX15006 toc20 OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY OUTPUT-NOISE SPECTRAL DENSITY (μV/√Hz) MAX15006 toc21 0 -10 EN 1V/div PSRR (dB) -20 -30 -40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 10 COUT = 10μF COUT = 2.2μF IOUT = 50mA 10 1 VOUT 2V/div MAX15006B/MAX15007B VIN = 40V, IOUT = 50mA 400μs/div 0.1 MAX15006A/MAX15007A IOUT = 50mA 0.01 0.01 0.1 1 FREQUENCY (kHz) 10 100 100 1000 FREQUENCY (kHz) OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY OUTPUT-NOISE SPECTRAL DENSITY (μV/√Hz) MAX15006 toc22 OUTPUT VOLTAGE NOISE vs. LOAD CURRENT 135 120 105 en (μVRMS) 90 75 60 45 30 MAX15006 toc23 10 150 1 0.1 MAX15006B/MAX15007B IOUT = 50mA 0.01 0.01 0.1 1 FREQUENCY (kHz) 10 100 15 0 0 5 MAX15006A/MAX15007A 10 15 20 25 30 35 40 45 50 IOUT (mA) FB VOLTAGE vs. INPUT VOLTAGE (MAX15007C, VOUT = 5V) MAX15006 toc24 FB VOLTAGE vs. TEMPERATURE (MAX15007C, VOUT = 5V) 1.229 1.228 1.227 MAX15006 toc25 1.230 1.230 1.229 VFB (V) VFB (V) 1.228 1.226 1.225 1.224 1.223 1.227 1.226 1.222 1.221 1.225 5 10 15 20 25 30 35 40 VIN (V) 1.220 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) 6 _______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1μF, COUT = 2.2μF, VEN = VIN, TA = +25°C, unless otherwise noted.) MAX15006/MAX15007 OUTPUT VOLTAGE NOISE vs. OUTPUT CAPACITANCE 135 120 105 en (μVRMS) 90 75 60 45 30 15 0 0 2 4 6 8 10 12 14 16 18 20 22 COUT (μF) MAX15006A/MAX15007A IOUT = 25mA MAX15006 toc26 CLAMPED LOAD DUMP (IOUT = 0) 150 MAX15006 toc27 40V VIN 13.5V VOUT AC-COUPLED 20mV/div 100ms/div Pin Description PIN MAX15006A/B TDFN 1, 2 SO 1 MAX15006C TDFN 1, 2 SO 1 MAX15007A/B TDFN 1, 2 SO 1 MAX15007C TDFN 1, 2 SO 1 IN Regulator Supply Input. Supply voltage ranges from 4V to 40V. Bypass with a 0.1μF capacitor to GND. No Connection. Not internally connected. Ground Regulator Output. Bypass OUT to GND with a low-ESR capacitor with a minimum 2.2μF. Feedback Regulation Set-Point. Connect an external resistive divider network from OUT to FB to GND to adjust the output voltage from 1.8V to 10V. Active-High Enable Input. Force EN high (or connect to VIN) to turn the regulator on. Pull EN low (or leave unconnected) to place the device in a low-power shutdown mode. EN is internally pulled down to GND through a 0.5μA sink current. Exposed Pad. Internally connected to GND. Connect EP to the ground plane for enhanced thermal performance. Do not use EP as a ground connection. NAME FUNCTION 3 4 5, 6 2, 3, 4, 6, 7 5 8 3 4 6 2, 3, 4, 6 5 8 — 4 5, 6 2, 4, 6, 7 5 8 — 4 6 2, 4, 6 5 8 N.C. GND OUT — — 5 7 — — 5 7 FB — — — — 3 3 3 3 EN — — — — — — — — EP _______________________________________________________________________________________ 7 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Functional Diagrams IN + THERMAL SENSOR 1.242V REF ERROR AMPLIFIER FET DRIVER WITH CURRENT LIMIT OUT FB (FOR MAX15006C ONLY) GND MAX15006 (FOR MAX15006A/B ONLY) Figure 1. MAX15006 Simplified Functional Diagram IN EN CONTROL LOGIC + FET DRIVER WITH CURRENT LIMIT THERMAL SENSOR 1.242V REF ERROR AMPLIFIER OUT FB (FOR MAX15007C ONLY) GND MAX15007 (FOR MAX150076A/B ONLY) Figure 2. MAX15007 Simplified Functional Diagram 8 _______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Detailed Description The MAX15006/MAX15007 high-voltage linear regulators operate over a 4V to 40V input voltage range. These devices guarantee 50mA load drive, and offer preset output voltages of +3.3V (MAX15006A/MAX15007A) or +5V (MAX15006B/MAX15007B) or an adjustable voltage output from 1.8V to 10V (MAX15006C/MAX15007C). Thermal shutdown and short-circuit protection prevent damage during overtemperature and overcurrent conditions. The MAX15007 includes an enable input (EN) allowing the regulators to be turned on/off using a logiclevel voltage. Driving EN high turns on the device while driving EN low places the device in a low-power shutdown mode. In shutdown, the supply current is reduced to 3μA (typ). The MAX15006/MAX15007 operate over the -40°C to +125°C automotive temperature range. All devices are available in thermally enhanced 6-pin TDFN and 8-pin SO packages capable of dissipating 1.904W and 1.860W at TA = +70°C, respectively. EN Input (MAX15007 Only) EN is an active-high, logic-level enable input that turns the device on or off. Drive EN high to turn the device on. An internal 0.5μA pulldown current keeps the MAX15007 in shutdown mode when driven by a threestate driver in high-impedance mode, or an open-drain driver. While in shutdown, the device consumes only 3μA (typ). EN withstands voltages up to 40V, allowing it to be driven by high input level voltages or connected to IN for always-on operation. MAX15006/MAX15007 Thermal Protection When the junction temperature exceeds +165°C, an internal thermal sensor turns the pass transistor off, and allows the device to cool. The thermal sensor turns the pass transistor on again after the junction temperature cools by 20°C. This results in a cycled output during continuous thermal-overload conditions. Thermal protection protects the MAX15006/MAX15007 in the event of fault conditions. Operation at TJ = +150°C without going into thermal shutdown is not guaranteed. Use Figures 3a and 3b to determine the minimum guaranteed output current. Regulator The regulator accepts an input voltage from 4V to 40V. The MAX15006A/MAX15007A have a fixed 3.3V output voltage while the MAX15006B/MAX15007B offer a fixed 5V output voltage. The MAX15006C/MAX15007C feature an adjustable voltage output by connecting an external resistive divider from OUT to FB and to GND (see the Output Voltage Setting section). Output Short-Circuit Current Limit The MAX15006/MAX15007 feature a 175mA current limit. The output can be shorted to GND for an indefinite period of time 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 +165°C, the MAX15006/ MAX15007 shut down and automatically restart after the die temperature cools by 20°C. 50 45 OUTPUT CURRENT (mA) 40 35 30 25 20 15 10 5 0 VIN = 26V, VOUT = 5V VIN = 18V, VOUT = 5V 50 45 OUTPUT CURRENT (mA) 40 35 30 25 20 15 10 5 0 VIN = 26V, VOUT = 5V VIN = 18V, VOUT = 5V VIN = 18V, VOUT = 3.3V VIN = 18V, VOUT = 3.3V VIN = 26V, VOUT = 3.3V VIN = 26V, VOUT = 3.3V 80 85 90 95 100 105 110 115 120 125 130 AMBIENT TEMPERATURE (°C) 80 85 90 95 100 105 110 115 120 125 130 AMBIENT TEMPERATURE (°C) Figure 3a. Minimum Output Current vs. Ambient Temperature (6-Pin TDFN-EP) Figure 3b. Minimum Output Current vs. Ambient Temperature (8-Pin SO-EP) _______________________________________________________________________________________ 9 _______________________________________________________________________________________ 9 MAX15006 fig03b MAX15006 fig03a 55 55 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Applications Information Output Voltage Setting The MAX15006C/MAX15007C provide an adjustable output voltage from 1.8V to 10V and do not operate in a preset output voltage mode. Connect an external resistive divider from OUT to FB to GND as shown in Figure 4 to set the desired output voltage. VOUT is calculated as follows: R1 ⎞ ⎛ VOUT = VFB × ⎜ 1 + ⎠ ⎝ R2 ⎟ where V FB = 1.23V and a 5μA minimum current is required in the external divider for stability. For the SO-EP package: ⎧1 . 8605W for T A ≤ + 70 °C ⎫ ⎪ ⎪ PD = ⎨ W ⎬ ⎪1 . 8605W − 0 . 0233 °C x ( TA – 70°C ) for + 70 °C < T A ≤ + 125 °C ⎪ ⎩ ⎭ After determining the allowable package dissipation, calculate the maximum allowable output current, without exceeding the +150°C junction temperature, using the following formula: IOUT(MAX) = PD ≤ 50mA VIN − VOUT Available Output Current Calculation The MAX15006/MAX15007 provide up to 50mA of continuous output current. The input voltage range extends to 40V. Package power dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. Figure 5 shows the maximum allowable power dissipation for these devices to keep the junction temperature below +150°C. Figure 5 assumes that the exposed metal pad of the MAX15006/MAX15007 is soldered to 1in2 of PCB copper. Use Figure 5 to determine the allowable package dissipation for a given ambient temperature. Alternately, use the following formulas to calculate the allowable package dissipation. For the TDFN package: ⎧1. 9048 W for T A ≤ + 70 °C ⎫ ⎪ ⎪ PD = ⎨ W ⎬ ⎪1. 9048 W − 0 . 0238 °C x ( TA – 70°C ) for + 70 °C < T A ≤ + 125 °C ⎪ ⎩ ⎭ The above equations do not include the negligible power dissipation from self-heating due to the IC ground current. Example 1 (TDFN Package): TA = +125°C VIN = 26V VOUT = 3.3V Calculate the maximum allowable package dissipation at the given temperature as follows: PD = 1.9048W − 0.0238 W (125°C − 70°C ) = 595.8mW °C And establish the maximum output current: IOUT(MAX) = 595.8mW = 26.2mA 26V − 3.3V IN OUT R1 0.1μF 2.2μF 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1.9408W (6-PIN TDFN) 1.8605W (8-PIN SO-EP) DERATE 23.8mW/°C MAX15007C FB EN ON OFF PD (W) R2 GND DERATE 23.3mW/°C VOUT = VFB (1 + R1/R2) VFB = 1.23V 0 20 40 60 80 100 TEMPERATURE (°C) 120 140 Figure 4. Setting the Adjustable Output Voltage 10 Figure 5. Calculated Maximum Power Dissipation vs. Ambient Temperature ______________________________________________________________________________________ MAX15006 fig04 +4V TO +40V +1.8V TO +10V 2.4 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Example 2 (TDFN Package): TA = +85°C VIN = 14V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows: W PD = 1.9048W − 0.0238 ( 85°C − 70°C ) = 1.5478W °C In Examples 2 and 3, the maximum output current is calculated as 172mA and 476mA, respectively; however, the allowable output current cannot exceed 50mA. Alternately, use Figures 6a and 6b to quickly determine the maximum allowable output current for selected ambient temperatures and input voltages. MAX15006/MAX15007 Output-Capacitor Selection and Regulator Stability For stable operation over the full temperature range and with load currents up to 50mA, use a low-ESR 2.2μF (min) ceramic or tantalum output capacitor. Use larger output-capacitor values such as 22μF to reduce noise, improve load-transient response, and powersupply rejection. Some ceramic dielectrics exhibit large capacitance and ESR variations with temperature. Ensure the minimum capacitance under worst-case conditions does not drop below 1.3μF to ensure output stability. With an X7R dielectric, 2.2μF should be sufficient at all operating temperatures. Then determine the maximum output current: IOUT(MAX) = 1.5478W = 172mA ⇒ I OUT(MAX) = 50mA X 14V − 5V Example 3 (TDFN Package): TA = +50°C VIN = 9V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows: PD = 1.9048W Find the maximum output current: IOUT(MAX) = 1.9048W = 476mA ⇒ I OUT(MAX) = 50mA ) 9V − 5V 50 45 IOUT(MAX) (mA) 40 35 30 25 20 15 10 5 0 0 5 10 15 20 VIN (V) TA = +125°C 55 50 45 IOUT(MAX) (mA) 40 35 30 25 20 15 10 5 0 TA = +125°C TA = +70°C TA = +85°C TA = +70°C TA = +85°C VOUT = 5V 6-PIN TDFN 25 30 35 40 VOUT = 5V 8-PIN SO-EP 0 5 10 15 20 VIN (V) 25 30 35 40 Figure 6a. Calculated Maximum Output Current vs. Input Voltage (6-Pin TDFN-EP) Figure 6b. Calculated Maximum Output Current vs. Input Voltage (8-Pin SO-EP) ______________________________________________________________________________________ MAX15006 fig05b MAX15006 fig05a 60 55 60 11 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Selector Guide PART MAX15006AASA+ MAX15006AATT+ MAX15006BASA+ MAX15006BATT+ MAX15006CASA+ MAX15006CATT+ MAX15007AASA+ MAX15007AATT+ MAX15007BASA+ MAX15007BATT+ MAX15007CASA+ MAX15007CATT+ ENABLE INPUT — — — — — — √ √ √ √ √ √ FIXED OUTPUT VOLTAGE (V) 3.3 3.3 5 5 — — 3.3 3.3 5 5 — — ADJUSTABLE OUTPUT VOLTAGE (V) — — — — ADJ (1.8 to 10) ADJ (1.8 to 10) — — — — ADJ (1.8 to 10) ADJ (1.8 to 10) PIN-PACKAGE 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP Pin Configurations (continued) TOP VIEW OUT OUT (FB) 6 5 GND 4 IN N.C. 1 2 3 EP MAX15007A MAX15007B MAX15007C + 8 7 6 5 OUT N.C. (FB) N.C. GND MAX15007A MAX15007B MAX15007C + 1 IN 2 IN EP 3 EN EN N.C. 4 SO TDFN ( ) FOR MAX15007C ONLY. 12 ______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Ordering Information (continued) PART MAX15006BASA+ MAX15006BATT+ MAX15006CATT+ MAX15007 AASA+ MAX15007AATT+ M AX15007BASA+ MAX15007BATT+ MAX15007CATT+ TEMP RANGE PINPACKAGE TOP MARK — — APF AUN API AVA — APG — APH APJ AUU Chip Information PROCESS: BiCMOS MAX15006/MAX15007 -40°C to +125°C 8 SO-EP* -40°C to +125°C 6 TDFN-EP* -40°C to +125°C 6 TDFN-EP* -40°C to +125°C 8 SO-EP* -40°C to +125°C 6 TDFN-EP* -40°C to +125°C 8 SO-EP* -40°C to +125°C 6 TDFN-EP* -40°C to +125°C 6 TDFN-EP* Package Information For the latest package outline information and land patterns (footprints), 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 6 TDFN-EP 8 SO-EP PACKAGE CODE T633+2 S8E+12 OUTLINE NO. 21-0137 21-0111 LAND PATTERN NO. 90-0058 90-0150 MAX15006BASA/V+ -40°C to +125°C 8 SO-EP* MAX15006BATT/V+ -40°C to +125°C 6 TDFN-EP* MAX15006CATT/V+ -40°C to +125°C 6 TDFN-EP* MAX15007CATT/V+ -40°C to +125°C 6 TDFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. *EP = Exposed pad. ______________________________________________________________________________________ 13 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Revision History REVISION NUMBER 0 1 2 3 4 5 REVISION DATE 10/06 5/08 11/09 12/10 7/11 11/11 Initial release Added MAX15006C/MAX15007C adjustable version to data sheet including Ordering Information, Electrical Characteristics, Pin Description, and Detailed Description Added the MAX15006A/MAX15006B automotive packages to the Ordering Information Added the MAX15006CATT and MAX15007CATT automotive packages to the Ordering Information Added the MAX15006AASA and MAX15006BASA automotive packages to the Ordering Information Changed the maximum I OUT = 5 0mA dropout of the MAX15006A/MAX15007A from 700mV to 1000mV DESCRIPTION PAGES CHANGED — 1–14 1, 13 13 1, 13 3 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.