19-0663; Rev 2; 11/09 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO 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 o Wide Operating Input Voltage Range (4V to 40V) o Guaranteed 50mA Output Current o Low Quiescent Current 10µA (No Load) and 90µA (Full Load) o Operates Through Cold-Crank Condition o Withstands 45V Load Dump o Low Dropout Voltage of 300mV (MAX15006B/MAX15007B) o Stable Operation with Tiny 2.2µF Output Capacitor o Enable Input (MAX15007) o Preset 3.3V and 5.0V Output Voltages o 1.8V to 10V Adjustable Output (MAX15006C/ MAX15007C) o Thermal and Short-Circuit Protection o -40°C to +125°C Operating Temperature Range o Thermally Enhanced 3mm x 3mm 6-Pin TDFN/ 8-Pin SO Packages Ordering Information Applications PART Automotive TEMP RANGE Tire-Pressure Monitoring MAX15006AASA+ -40°C to +125°C Industrial MAX15006AATT+ -40°C to +125°C PINTOP PACKAGE MARK 8 SO-EP** 6 TDFN- — APE -40°C to +125°C 6 TDFN— -40°C to +125°C 8 SO-EP** MAX15006BASA+ — Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product—contact factory for availability. **EP = Exposed pad. /V Denotes an automotive-qualified part. MAX15006AATT/V+ Telecom Networking Pin Configurations TOP VIEW OUT OUT (FB) 6 5 GND MAX15006A MAX15006B MAX15006C 4 IN MAX15006A MAX15006B MAX15006C + 1 2 3 IN IN N.C. TDFN Pin Configurations continued at end of data sheet. + 8 OUT N.C. 2 7 N.C. (FB) 3 6 N.C. 5 GND N.C. *EP 1 N.C. 4 *EP SO *EXPOSED PAD ( ) FOR MAX15006C ONLY. ________________________________________________________________ Maxim Integrated Products 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. 1 MAX15006/MAX15007 General Description MAX15006/MAX15007 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO 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) 6-Pin TDFN-EP (derate 23.8mW/°C above +70°C).........1904mW 8-Pin SO-EP (derate 23.3mW/°C above +70°C)...........1860mW Thermal Resistance (Note 1) θJA, 6-Pin TDFN ...........................................................42°C/W θJC, 6-Pin TDFN ..........................................................8.5°C/W θJA, 8-Pin SO-EP ..........................................................43°C/W θJC, 8-Pin SO-EP ............................................................7°C/W 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 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, see 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 CONDITIONS VIN MIN Shutdown Supply Current IGND ISHDN UNITS 40 V 10 17 IOUT = 0 (MAX15006C) 8 15 IOUT = 0 (MAX15007A/B) 11 18 IOUT = 100µA (MAX15006A/B) Regulator on, measured at GND MAX IOUT = 0 (MAX15006A/B) IOUT = 0 (MAX15007C) Ground Current TYP 4 9 16 10.5 18 IOUT = 100µA (MAX15006C) 8.5 16 IOUT = 100µA (MAX15007A/B) 11.5 19 IOUT = 100µA (MAX15007C) 9.5 17 IOUT = 1mA (MAX15006A/B) 12 20 IOUT = 1mA (MAX15006C) 10 18 IOUT = 1mA (MAX15007A/B) 13 21 IOUT = 1mA (MAX15007C) 11 19 IOUT = 50mA (MAX15006) 90 150 IOUT = 50mA (MAX15007) 93 150 3 5 Regulator off (MAX15007 only) µA µA REGULATOR Guaranteed Output Current Output Voltage (Note 3) Dropout Voltage (Notes 4, 5) IOUT VOUT ∆VDO VIN ≥ VOUT + ∆VDO IOUT = 1mA 50 mA MAX15006A/MAX15007A 3.25 3.3 3.35 MAX15006B/MAX15007B 4.925 5.0 5.075 MAX15006C/MAX15007C 1.8 10 IOUT = 5mA, MAX15006B/MAX15007B 30 53 IOUT = 5mA, MAX15006C/MAX15007C 30 60 IOUT = 50mA, MAX15006B/MAX15007B 300 525 IOUT = 50mA, MAX15006C/MAX15007C 300 600 IOUT = 50mA, MAX15006A/MAX15007A 2 V _______________________________________________________________________________________ 700 mV 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO (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 SYMBOL CONDITIONS Line Regulation 6V ≤ VIN ≤ 35V, IOUT = 1mA Load Regulation VIN = VOUT + 3V, IOUT = 100µA to 50mA Output Current Limit TYP 0.7 80 Output Voltage Noise Power-Supply Rejection Ratio MIN PSRR 100Hz to 100kHz, IOUT VOUT = 3.3V = 50mA, COUT = 2.2µF VOUT = 5V 115 f = 100Hz, VIN_RIPPLE = 500mVP-P, IOUT = 50mA 66 FB Threshold Voltage VFB ILOAD = 1mA (MAX15006C/MAX15007C only) FB Input Current IFB VFB = 0V, 1.5V (MAX15006C/MAX15007C only) MAX UNITS 0.25 % 1.5 % 350 mA µVRMS 179 1.2 1.23 -100 dB 1.26 V +100 nA ENABLE LOGIC Enable Threshold Voltage VIL 0.4 VIH 1.4 Enable Threshold Hysteresis 60 Enable Pulldown Current Internally pulled down to GND 0.5 Enable to Regulation Time (Note 6) 0.4 V mV µA 2 ms THERMAL SHUTDOWN Thermal Shutdown TSHDN Thermal Shutdown Hysteresis THYST Junction temperature rising +165 °C 20 °C 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 MAX15006/MAX15007 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VIN = 14V, CIN = 0.1µF, COUT = 2.2µF, VEN = VIN, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006B/MAX15007B) 4.5 3.42 3.39 4.0 2.4 2.1 1.5 1.2 0.9 VOUT (V) 1.8 3.0 2.5 5 10 15 20 25 30 35 3.30 1.5 3.24 1.0 3.21 0.5 40 IOUT = 50mA 3.18 IOUT = 0 0 0 3.33 3.27 2.0 IOUT = 0 IOUT = 1mA 3.36 3.5 0.6 0.3 0 3.15 0 5 10 15 20 25 30 35 40 -50 -25 0 25 50 75 100 125 150 VIN (V) VIN (V) TEMPERATURE (°C) OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006B/MAX15007B) DROPOUT VOLTAGE vs. LOAD CURRENT (MAX15006B/MAX15007B) GROUND CURRENT vs. LOAD CURRENT (MAX15006B/MAX15007B) IOUT = 1mA 350 VDROPOUT (mV) 5.10 5.05 5.00 4.95 4.90 TA = +125°C 400 100 90 80 300 TA = -40°C 200 60 40 30 100 20 4.80 50 10 4.75 0 IOUT = 50mA -50 -25 0 25 50 100 125 150 75 TA = +25°C 50 150 4.85 TA = +125°C 70 TA = +25°C 250 MAX15006 toc06 5.15 450 IGND (µA) 5.20 MAX15006 toc05 500 MAX15006 toc04 5.25 TA = -40°C 0 0 5 10 15 20 25 30 35 40 45 50 0 10 15 20 25 30 35 40 45 50 5 TEMPERATURE (°C) IOUT (mA) IOUT (mA) GROUND CURRENT vs. TEMPERATURE (IOUT = 0) GROUND CURRENT vs. TEMPERATURE (IOUT = 50mA) SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 14 99 98 9 8 97 VIN = +40V 8 VIN = +14V 6 VIN = +6V 96 95 94 5 3 92 2 2 91 1 0 90 0 25 50 75 TEMPERATURE (°C) 100 125 150 VIN = +6V 4 93 -25 VIN = +14V 6 4 -50 VIN = +40V 7 ISHDN (µA) 10 IGND (µA) 12 MAX15006 toc09 16 10 MAX15006 toc08 100 MAX15006 toc07 18 4 3.45 MAX15006 toc02 5.0 VOUT (V) VOUT (V) 3.0 2.7 VOUT (V) 5.5 MAX15006 toc01 3.6 3.3 OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006A/MAX15007A) MAX15006 toc03 OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006A/MAX15007A) IGND (µA) MAX15006/MAX15007 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO 0 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 150 -50 -25 0 25 50 75 TEMPERATURE (°C) _______________________________________________________________________________________ 100 125 150 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO 24 21 NUMBER OF UNITS NUMBER OF UNITS 21 18 15 12 9 MAX15007, IOUT = 0 50 UNITS TESTED 18 15 12 6 27 9 21 18 15 12 9 6 6 3 3 3 0 0 0 10.4 10.5 10.6 10.7 10.8 10.9 11.0 10.8 10.9 11.0 11.1 11.2 11.3 11.6 11.4 IGND (µA) IGND (µA) LOAD-TRANSIENT RESPONSE (MAX15006B/MAX15007B) INPUT-VOLTAGE STEP RESPONSE (MAX15006B/MAX15007B, IOUT = 1mA) MAX15006 toc13 MAX15007, IOUT = 0 50 UNITS TESTED 24 NUMBER OF UNITS 24 27 MAX15006 toc11 MAX15007, IOUT = 0 50 UNITS TESTED MAX15006 toc10 27 GROUND CURRENT DISTRIBUTION (TA = +125°C) GROUND CURRENT DISTRIBUTION (TA = +25°C) MAX15006 toc12 GROUND CURRENT DISTRIBUTION (TA = -40°C) 11.7 11.8 11.9 12.0 12.1 IGND (µA) STARTUP RESPONSE MAX15006 toc14 VOUT AC-COUPLED 200mV/div 50mA IOUT 1mA MAX15006 toc15 18V VIN 14V VIN 5V/div VOUT AC-COUPLED 100mV/div VOUT 2V/div MAX15006B/MAX15007B IOUT = 1mA 400µs/div 400µs/div ENABLE STARTUP RESPONSE ENABLE STARTUP RESPONSE MAX15006 toc16 MAX15006B/MAX15007B IOUT = 0 400µs/div 200µs/div ENABLE STARTUP RESPONSE MAX15006 toc17 MAX15006 toc18 EN 1V/div EN 1V/div EN 1V/div VOUT 2V/div VOUT 2V/div VOUT 2V/div MAX15006B/MAX15007B IOUT = 50mA 400µs/div MAX15006B/MAX15007B VIN = 40V, IOUT = 0 400µs/div _______________________________________________________________________________________ 5 MAX15006/MAX15007 Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1µF, COUT = 2.2µF, VEN = VIN, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1µF, COUT = 2.2µF, VEN = VIN, TA = +25°C, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY IOUT = 50mA -10 -20 EN 1V/div PSRR (dB) -30 COUT = 2.2µF -40 -50 -60 -70 VOUT 2V/div -80 MAX15006B/MAX15007B VIN = 40V, IOUT = 50mA COUT = 10µF -90 -100 0.01 400µs/div 0.1 1 10 1 0.1 MAX15006A/MAX15007A IOUT = 50mA 0.01 1000 100 10 MAX15006 toc21 0 OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY OUTPUT-NOISE SPECTRAL DENSITY (µV/√Hz) MAX15006 toc19 MAX15006 toc20 ENABLE STARTUP RESPONSE 0.01 0.1 FREQUENCY (kHz) 10 OUTPUT VOLTAGE NOISE vs. LOAD CURRENT MAX15006 toc23 150 MAX15006 toc22 135 120 105 1 en (µVRMS) 0.1 90 75 60 45 30 MAX15006B/MAX15007B IOUT = 50mA 15 MAX15006A/MAX15007A 0 0.01 0.01 0.1 1 10 0 100 5 10 15 20 25 30 35 40 45 50 FREQUENCY (kHz) IOUT (mA) FB VOLTAGE vs. INPUT VOLTAGE (MAX15007C, VOUT = 5V) FB VOLTAGE vs. TEMPERATURE (MAX15007C, VOUT = 5V) 1.230 MAX15006 toc24 1.230 1.229 MAX15006 toc25 OUTPUT-NOISE SPECTRAL DENSITY (µV/√Hz) 10 1 FREQUENCY (kHz) OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY 1.229 1.228 1.227 1.228 VFB (V) VFB (V) MAX15006/MAX15007 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO 1.226 1.225 1.224 1.227 1.223 1.222 1.226 1.221 1.220 1.225 5 10 15 20 25 VIN (V) 6 30 35 40 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) _______________________________________________________________________________________ 100 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO OUTPUT VOLTAGE NOISE vs. OUTPUT CAPACITANCE CLAMPED LOAD DUMP (IOUT = 0) MAX15006 toc27 MAX15006 toc26 150 135 120 40V VIN en (µVRMS) 105 90 13.5V 75 60 45 VOUT AC-COUPLED 20mV/div 30 MAX15006A/MAX15007A IOUT = 25mA 15 0 0 2 4 6 8 10 12 14 16 18 20 22 100ms/div COUT (µF) Pin Description PIN MAX15006A/B MAX15006C MAX15007A/B MAX15007C NAME FUNCTION Regulator Supply Input. Supply voltage ranges from 4V to 40V. Bypass with a 0.1µF capacitor to GND. TDFN SO TDFN SO TDFN SO TDFN SO 1, 2 1 1, 2 1 1, 2 1 1, 2 1 IN 3 2, 3, 4, 6, 7 3 2, 3, 4, 6 — 2, 4, 6, 7 — 2, 4, 6 N.C. No Connection. Not internally connected. 4 5 4 5 4 5 4 5 GND Ground 5, 6 8 6 8 5, 6 8 6 8 OUT Regulator Output. Bypass OUT to GND with a low-ESR capacitor with a minimum 2.2µF. — — — — — — 5 — — 7 — — — 3 — — 3 — 5 3 — 7 3 — FB 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. EN 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. EP Exposed Pad. Internally connected to GND. Connect EP to the ground plane for enhanced thermal performance. Do not use EP as a ground connection. _______________________________________________________________________________________ 7 MAX15006/MAX15007 Typical Operating Characteristics (continued) (VIN = 14V, CIN = 0.1µF, COUT = 2.2µF, VEN = VIN, TA = +25°C, unless otherwise noted.) 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Functional Diagrams IN - FET DRIVER WITH CURRENT LIMIT + THERMAL SENSOR 1.242V REF ERROR AMPLIFIER OUT FB (FOR MAX15006C ONLY) GND MAX15006 (FOR MAX15006A/B ONLY) Figure 1. MAX15006 Simplified Functional Diagram IN EN CONTROL LOGIC + THERMAL SENSOR 1.242V REF FET DRIVER WITH CURRENT LIMIT 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 Regulator VIN = 18V, VOUT = 5V 50 OUTPUT CURRENT (mA) 45 VIN = 18V, VOUT = 3.3V 40 35 30 25 VIN = 26V, VOUT = 5V 20 15 10 55 VIN = 26V, VOUT = 3.3V 5 VIN = 18V, VOUT = 5V 50 45 OUTPUT CURRENT (mA) 55 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. MAX15006 fig03a 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). 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. MAX15006 fig03b 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. VIN = 18V, VOUT = 3.3V 40 35 30 25 VIN = 26V, VOUT = 5V 20 15 10 VIN = 26V, VOUT = 3.3V 5 0 0 80 85 90 95 100 105 110 115 120 125 130 80 85 90 95 100 105 110 115 120 125 130 AMBIENT TEMPERATURE (°C) 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) _______________________________________________________________________________________ _______________________________________________________________________________________ 99 MAX15006/MAX15007 Detailed Description 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 ⎠ For the SO-EP package: ⎧1.8605W for TA ≤ + 70°C ⎫ ⎪ ⎪ PD = ⎨ ⎬ W + ° < ≤ + ° . − . – ° 1 8605 W 0 0233 70 70 125 x T C for C T C ( ) A A ⎪ ⎪ °C ⎩ ⎭ After determining the allowable package dissipation, calculate the maximum allowable output current, without exceeding the +150°C junction temperature, using the following formula: 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: ⎧1.9048W for TA ≤ + 70°C ⎫ ⎪ ⎪ PD = ⎨ ⎬ W . − . – ° + ° < ≤ + ° 1 9048 W 0 0238 70 70 125 x T C for C T C ( ) A A ⎪ ⎪ °C ⎩ ⎭ +4V TO +40V 0.1µF PD = 1.9048W − 0.0238 IOUT(MAX) = R1 FB ON EN R2 GND W (125°C − 70°C) = 595.8mW °C And establish the maximum output current: 2.2µF MAX15007C OFF 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: +1.8V TO +10V OUT IN PD ≤ 50mA VIN − VOUT IOUT(MAX) = where V FB = 1.23V and a 5µA minimum current is required in the external divider for stability. 595.8mW = 26.2mA 26V − 3.3V 2.4 2.2 2.0 1.9408W (6-PIN TDFN) 1.8 1.6 1.8605W (8-PIN SO-EP) 1.4 1.2 1.0 MAX15006 fig04 Applications Information PD (W) MAX15006/MAX15007 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO DERATE 23.8mW/°C DERATE 23.3mW/°C 0.8 0.6 0.4 0.2 0 0 VOUT = VFB (1 + R1/R2) VFB = 1.23V Figure 4. Setting the Adjustable Output Voltage 10 20 40 60 80 100 TEMPERATURE (°C) 120 140 Figure 5. Calculated Maximum Power Dissipation vs. Ambient Temperature ______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO W PD = 1.9048W − 0.0238 (85°C − 70°C) = 1.5478W °C Then determine the maximum output current: 1.5478W = 172mA ⇒ IOUT(MAX) = 50mA 14V − 5V IOUT(MAX) = Example 3 (TDFN Package): TA = +50°C VIN = 9V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows: 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. 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. PD = 1.9048W Find the maximum output current: 1.9048W = 476mA ⇒ IOUT(MAX) = 50mA 9V − 5V 45 50 45 TA = +70°C 40 35 30 TA = +85°C TA = +125°C 25 20 15 10 5 MAX15006 fig05b 50 IOUT(MAX) (mA) 60 55 MAX15006 fig05a 60 55 IOUT(MAX) (mA) IOUT(MAX) = TA = +70°C 40 35 TA = +85°C 30 25 20 TA = +125°C 15 10 VOUT = 5V 6-PIN TDFN VOUT = 5V 8-PIN SO-EP 5 0 0 0 5 10 15 20 25 30 35 40 VIN (V) Figure 6a. Calculated Maximum Output Current vs. Input Voltage (6-Pin TDFN-EP) 0 5 10 15 20 25 30 35 40 VIN (V) Figure 6b. Calculated Maximum Output Current vs. Input Voltage (8-Pin SO-EP) ______________________________________________________________________________________ 11 MAX15006/MAX15007 Example 2 (TDFN Package): TA = +85°C VIN = 14V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows: 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007 Selector Guide PART ENABLE INPUT FIXED OUTPUT VOLTAGE (V) ADJUSTABLE OUTPUT VOLTAGE (V) PIN-PACKAGE MAX15006AASA+ — 3.3 — 8 SO-EP 6 TDFN-EP MAX15006AATT+ — 3.3 — MAX15006BASA+ — 5 — 8 SO-EP MAX15006BATT+ — 5 — 6 TDFN-EP MAX15006CASA+ — — ADJ (1.8 to 10) 8 SO-EP MAX15006CATT+ — — ADJ (1.8 to 10) 6 TDFN-EP MAX15007AASA+ √ 3.3 — 8 SO-EP 6 TDFN-EP MAX15007AATT+ √ 3.3 — MAX15007BASA+ √ 5 — 8 SO-EP MAX15007BATT+ √ 5 — 6 TDFN-EP MAX15007CASA+ √ — ADJ (1.8 to 10) 8 SO-EP MAX15007CATT+ √ — ADJ (1.8 to 10) 6 TDFN-EP Pin Configurations (continued) TOP VIEW OUT OUT (FB) 6 5 4 MAX15007A MAX15007B MAX15007C *EP + 1 2 3 IN IN EN TDFN 12 MAX15007A MAX15007B MAX15007C GND IN 1 N.C. EN + 8 OUT 2 7 N.C. (FB) 3 6 N.C. 5 GND N.C. 4 *EP SO *EXPOSED PAD ( ) FOR MAX15007C ONLY. ______________________________________________________________________________________ 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO PART TEMP RANGE PINTOP PACKAGE MARK Chip Information PROCESS: BiCMOS MAX15006BATT+ -40°C to +125°C 6 TDFN- APF MAX15006BATT/V+ -40°C to +125°C 6 TDFN- — MAX15006CASA+* -40°C to +125°C — Package Information MAX15006CATT+ -40°C to +125°C 8 SO-EP** 6 TDFN- API MAX15007AASA+ -40°C to +125°C MAX15007AATT+ -40°C to +125°C 8 SO-EP** 6 TDFN- For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. APG PACKAGE TYPE MAX15007BASA+ -40°C to +125°C MAX15007BATT+ MAX15007CASA+* — — -40°C to +125°C 8 SO-EP** 6 TDFN- APH -40°C to +125°C 8 SO-EP** — -40°C to +125°C 6 TDFNMAX15007CATT+ +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product—contact factory for availability. **EP = Exposed pad. /V Denotes an automotive-qualified part. PACKAGE CODE DOCUMENT NO. 6 TDFN-EP T633-2 21-0137 8 SO-EP S8E-12 21-0111 APJ ______________________________________________________________________________________ 13 MAX15006/MAX15007 Ordering Information (continued) MAX15006/MAX15007 40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO Revision History REVISION NUMBER REVISION DATE 0 10/06 Initial release 1 5/08 Added MAX15006C/MAX15007C adjustable version to data sheet including Ordering Information, Electrical Characteristics, Pin Description, and Detailed Description. 1–14 2 11/09 Added the MAX15006A/MAX15006B automotive packages to the Ordering Information. 1, 13 DESCRIPTION PAGES CHANGED — 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 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.