19-2599; Rev 0; 10/02 500mA, Low-Voltage Linear Regulator in Tiny QFN An internal PMOS pass transistor allows low 210µA supply current, making this device ideal for portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, and other equipment, including base stations and docking stations. Other features include an active-low, power-OK output that indicates when the output is out of regulation, a 0.02µA shutdown mode, short-circuit protection, and thermal-shutdown protection. The MAX1935 comes in a tiny 1.9W, 8-pin 3mm x 3mm thin QFN package. Features ♦ Guaranteed 500mA Output Current ♦ Output Down to 0.8V ♦ Low 175mV Dropout at 500mA ♦ ±1.5% Output Voltage Accuracy Preset at 1.5V Adjustable from 0.8V to 4.5V ♦ Power-OK Output ♦ Low 210µA Ground Current ♦ 0.02µA Shutdown Current ♦ Thermal-Overload Protection ♦ Output Current Limit ♦ Tiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package Ordering Information Applications Notebook Computers Cellular and Cordless Telephones PDAs Palmtop Computers PART TEMP RANGE PIN-PACKAGE MAX1935ETA* -40°C to +85°C 8 Thin QFN 3mm x 3mm MAX1935ETA15* -40°C to +85°C 8 Thin QFN 3mm x 3mm *Contact factory for preset output voltages. Base Stations Selector Guide USB Hubs Docking Stations OUTPUT VOLTAGE PART MAX1935ETA Adjustable ADB 1.5V ADB MAX1935ETA15 Pin Configuration Typical Operating Circuit RPOK 100kΩ VOUT 0.8V TO 4.5V COUT 10µF R1 MAX1935 IN TOP VIEW OUT POK TO µC VIN 2.25V TO 5.5V TOP MARK SET CIN 1µF IN 1 8 IN 2 7 OUT POK 3 6 SET SHDN 4 5 GND MAX1935 OUT R2 ON SHDN GND THIN QFN 3mm x 3mm OFF ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX1935 General Description The MAX1935 low-dropout linear regulator operates from a 2.25V to 5.5V supply and delivers a guaranteed 500mA load current with low 175mV dropout. The highaccuracy (±1.5%) output voltage is preset at an internally trimmed voltage or can be adjusted from 0.8V to 4.5V with an external resistive-divider. MAX1935 500mA, Low-Voltage Linear Regulator in Tiny QFN ABSOLUTE MAXIMUM RATINGS IN, SHDN, POK, SET to GND ...................................-0.3V to +6V OUT to GND ................................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70°C) 8-Pin Thin QFN (derate 24.4mW/°C above +70°C) .......1.95W Operating Temperature .......................................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 = VOUT(SETPOINT) + 500mV or VIN = 2.25V whichever is greater, SET = GND, SHDN = IN, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Input Voltage Input Undervoltage Lockout Output Voltage Accuracy (Preset Mode) SYMBOL CONDITIONS VIN VUVLO VOUT VSET Maximum Output Current IOUT Short-Circuit Current Limit ILIM Ground-Pin Current ISET IQ Dropout Voltage (Note 1) MAX 5.50 V 2 2.15 V 2.25 1.85 TA = +25°C, IOUT = 100mA -1.5 +1.5 TA = +25°C, IOUT = 1mA to 500mA -2.5 +2.5 -3 +3 TA = 0°C to +85°C, IOUT = 1mA to 500mA, VIN > VOUT + 0.5V 0.8 4.5 TA = +25°C, IOUT = 100mA 788 812 TA = +25°C, IOUT = 1mA to 500mA 780 820 TA = 0°C to +85°C, IOUT = 1mA to 500mA, VIN > VOUT + 0.5V 774 800 VOUT = 0V VSET = 0.8V V mV 600 1400 2300 mA 35 80 125 mV +100 nA -100 210 IOUT = 500mA 575 600 µA VOUT = 2.25V 259 400 VOUT = 2.8V 201 350 VOUT = 4V 147 275 0 0.125 %/V 35 ppm/mA Line Regulation ∆VLNR VIN from (VOUT + 100mV) to 5.5V, ILOAD = 5mA Load Regulation ∆VLDR IOUT = 1mA to 500mA 15.5 10Hz to 1MHz, COUT = 10µF (ESR < 0.1Ω) 300 SHDN = GND, VIN = 5.5V 0.02 Output Voltage Noise % mARMS IOUT = 1mA IOUT = 500mA UNITS 826 500 SET Dual Mode™ Threshold SET Input Bias Current TYP Rising, 40mV hysteresis Adjustable Output Voltage SET Voltage Threshold (Adjustable Mode) MIN mV µVRMS SHUTDOWN Shutdown Supply Current SHDN Input Threshold IOFF VIH 1.6 0.6 VIL SHDN Input Bias Current I SHDN SHDN = GND or IN 10 Startup Time tSTART COUT = 10µF, time from SHDN high to POK high 40 Dual Mode is a trademark of Maxim Integrated Products, Inc. 2 5 _______________________________________________________________________________________ 100 µA V nA µs 500mA, Low-Voltage Linear Regulator in Tiny QFN (VIN = VOUT(SETPOINT) + 500mV or VIN = 2.25V whichever is greater, SET = GND, SHDN = IN, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5 50 mV 5.5 V 100 nA 96 % POWER-OK POK Output Low Voltage VOL Operating Voltage Range for Valid POK Output Sinking 2mA Sinking 100µA 1.0 Output High Leakage Current VPOK = 5.5V Threshold Rising edge, referred to VOUT(NOMINAL) 90 93 THERMAL PROTECTION Thermal-Shutdown Temperature TSHDN 170 °C Thermal-Shutdown Hysteresis ∆TSHDN 20 °C ELECTRICAL CHARACTERISTICS (VIN = VOUT(SETPOINT) + 500mV or VIN = 2.25V whichever is greater, SET = GND, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Input Voltage SYMBOL CONDITIONS VIN MIN UNITS 2.25 5.50 V 2.15 V -4 +4 % 0.8 4.5 V IOUT = 1mA to 500mA 766 834 mV VUVLO Rising, 40mV hysteresis Output Voltage Accuracy (Preset Mode) VOUT IOUT = 1mA to 500mA Adjustable Output Voltage SET Voltage Threshold (Adjustable Mode) VSET Maximum Output Current IOUT Short-Circuit Current Limit ILIM VOUT = 0V 600 ISET VSET = 0.8V IQ IOUT = 1mA 500 SET Dual Mode Threshold Ground-Pin Current MAX 1.85 Input Undervoltage Lockout SET Input Bias Current TYP mARMS 2500 mA 35 125 mV -100 +100 nA 400 µA 5 µA SHUTDOWN Shutdown Supply Current SHDN Input Threshold SHDN Input Bias Current IOFF SHDN = GND, VIN = 5.5V VIH 2.5V < VIN < 5.5V VIL 2.5V < VIN < 5.5V 0.6 I SHDN SHDN = GND or IN 100 1.6 V nA _______________________________________________________________________________________ 3 MAX1935 ELECTRICAL CHARACTERISTICS (continued) ELECTRICAL CHARACTERISTICS (continued) (VIN = VOUT(SETPOINT) + 500mV or VIN = 2.25V whichever is greater, SET = GND, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 50 mV 5.5 V 100 nA 97 % POWER-OK POK Output Low Voltage VOL Sinking 2mA Operating Voltage Range for Valid POK Output Sinking 100µA 1.0 Output High Leakage Current VPOK = 5.5V Threshold Rising edge, referred to VOUT(NOMINAL) 89 Note 1: Dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT and when VIN = VOUT(NOM) + 0.5V. For 2.25V ≤ VOUT ≤ 4V, dropout voltage limits are linearly interpolated from the values listed. For VOUT < 4V, dropout voltage limit is equal to the value for VOUT = 4V. Note 2: Specifications to -40°C are guaranteed by design, not production tested. Typical Operating Characteristics (VOUT = 3.3V, VIN = VOUT + 500mV, SHDN = IN, CIN = 1µF, COUT = 10µF, TA = +25°C, unless otherwise noted.) 3.31 1.0 0.5 3.29 3.28 3.27 3.32 3.31 3.30 3.29 3.25 3.28 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 100 200 300 400 500 600 700 800 -40 -15 10 35 60 TEMPERATURE (°C) DROPOUT VOLTAGE vs. LOAD CURRENT DROPOUT VOLTAGE vs. OUTPUT VOLTAGE GROUND-PIN CURRENT vs. INPUT VOLTAGE MAX1935 toc04 350 250 TA = +25°C 200 150 100 0.28 DROPOUT VOLTAGE (V) TA = +85°C 300 TA = -40°C 0.26 0.24 0.22 0.20 0.18 0.16 50 0 100 200 300 400 500 600 700 800 LOAD CURRENT (mA) 600 550 500 450 400 350 300 250 200 150 100 50 85 IOUT = 500mA IOUT = 0mA 0 0.14 0 GROUND-PIN CURRENT (µA) LOAD CURRENT (mA) MAX1935 toc05 INPUT VOLTAGE (V) 400 4 3.33 3.26 0 VIN = VOUT + 500mV IOUT = 0 MAX1935 toc06 1.5 3.30 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) IOUT = 500mA 2.0 OUTPUT VOLTAGE vs. TEMPERATURE 3.34 MAX1935 toc02 MAX1935 toc01 IOUT = 0mA 3.0 2.5 OUTPUT VOLTAGE vs. LOAD CURRENT 3.32 MAX1935 toc03 OUTPUT VOLTAGE vs. INPUT VOLTAGE 3.5 DROPOUT VOLTAGE (mV) MAX1935 500mA, Low-Voltage Linear Regulator in Tiny QFN 2.0 2.5 3.0 3.5 OUTPUT VOLTAGE (V) 4.0 4.5 2.0 2.5 3.0 3.5 4.0 4.5 INPUT VOLTAGE (V) _______________________________________________________________________________________ 5.0 5.5 6.0 500mA, Low-Voltage Linear Regulator in Tiny QFN GROUND-PIN CURRENT vs. LOAD CURRENT 350 VIN = 3.8V 300 250 200 190 MAX1935 toc09 -60 MAX1935 toc08 VIN = VOUT + 500mV IOUT = 0 -50 -40 PSRR (dB) VIN = 5.5V GROUND-PIN CURRENT (µA) 450 180 170 -30 -20 160 -10 COUT = 10µF IOUT = 50mA 150 0 150 100 -40 -15 100 200 300 400 500 600 700 800 10 35 60 0.01 85 0.1 1 10 100 1000 FREQUENCY (kHz) TEMPERATURE (°C) LOAD CURRENT (mA) OUTPUT SPECTRAL NOISE DENSITY vs. FREQUENCY OUTPUT NOISE DC TO 1MHz COUT = 10µF IOUT = 50mA MAX1935 toc10 MAX1935 toc11 10 OUTPUT SPECTRAL NOISE DENSITY (µV/√Hz) 1 VOUT 1mV/div 0.1 0.01 VOUT = 3.3V ROUT = 66Ω (50mA) 0.001 0.1 1 10 100 1000 20ms/div FREQUENCY (kHz) REGION OF STABLE COUT ESR vs. LOAD CURRENT LOAD-TRANSIENT RESPONSE MAX1935 toc13 100 MAX1935 toc12 0 REGION OF COUT ESR GROUND-PIN CURRENT (µA) 200 MAX1935 toc07 500 400 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY GROUND-PIN CURRENT vs. TEMPERATURE IOUT 200mA/div 10 COUT = 10µF 1 VOUT 20mV/div STABLE REGION 0.1 VIN = VOUT + 500mV CIN = 10µF ROUT = 660Ω TO 6.6Ω (5mA TO 500mA) 0.01 0 100 200 300 400 500 600 700 800 10µs/div FREQUENCY (kHz) _______________________________________________________________________________________ 5 MAX1935 Typical Operating Characteristics (continued) (VOUT = 3.3V, VIN = VOUT + 500mV, SHDN = IN, CIN = 1µF, COUT = 10µF, TA = +25°C, unless otherwise noted.) MAX1935 500mA, Low-Voltage Linear Regulator in Tiny QFN Typical Operating Characteristics (continued) (VOUT = 3.3V, VIN = VOUT + 500mV, SHDN = IN, CIN = 1µF, COUT = 10µF, TA = +25°C, unless otherwise noted.) LOAD-TRANSIENT RESPONSE NEAR DROPOUT LINE-TRANSIENT RESPONSE MAX1935 toc15 MAX1935 toc14 6V VIN 1V/div IOUT 200mA/div 3V VOUT 50mV/div VIN = VOUT + 100mV CIN = 10µF ROUT = 660Ω TO 6.6Ω (5mA TO 500mA) VOUT 10mV/div 200µs/div 10µs/div SHUTDOWN WAVEFORM POK WAVEFORM MAX1935 toc16 MAX1935 toc17 5V 2V VSHDN 1V/div VIN 2V/div 0 0 3V VOUT 2V/div VOUT 1V/div 0 VPOK 2V/div 0 0 ROUT = 6.6Ω (500mA) ROUT = 66Ω (50mA) 20µs/div 200µs/div Pin Description 6 PIN NAME FUNCTION 1, 2 IN Regulator Input. Supply voltage can range from 2.25V to 5.5V. Bypass with a 1µF capacitor to GND (see the Capacitor Selection and Regulation Stability section). Connect both input pins together externally. 3 POK Open-Drain, Active-Low Power-OK Output. POK remains low while the output voltage (VOUT) is below the POK threshold. Connect a 100kΩ pullup resistor from POK to OUT. 4 SHDN Active-Low Shutdown Input. A logic low at SHDN reduces supply current to 0.02µA. In shutdown, the POK output is low. Connect SHDN to IN for normal operation. 5 GND Ground. This pin and the exposed pad also function as a heatsink. Solder both to a large pad or to the circuit-board ground plane to maximize power dissipation. 6 SET Voltage-Setting Input. Connect SET to GND for preset output. Connect an external resistive voltage-divider from OUT to SET to set the output voltage between 0.8V and 4.5V. The SET regulation voltage is 800mV. 7, 8 OUT Regulator Output. OUT sources up to 500mA. Bypass OUT with a 10µF low-ESR capacitor to GND. Connect both OUT pins together externally. _______________________________________________________________________________________ 500mA, Low-Voltage Linear Regulator in Tiny QFN The MAX1935 is a low-dropout, low-quiescent-current linear regulator. The device supplies loads up to 500mA and is available with preset output voltages. As illustrated in Figure 1, the MAX1935 includes a 0.8V reference, error amplifier, P-channel pass transistor, and internal feedback voltage-divider. The reference is connected to the error amplifier, which compares it with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, which allows more current to pass to the output increasing the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to pass to the output. The output voltage is fed back through either an internal resistive voltage-divider connected to OUT or an external resistor network connected to SET. The dualmode comparator examines VSET and selects the feedback path. If VSET is below 35mV, the internal feedback path is used, and the output is regulated to the factorypreset voltage. Additional blocks include an output current limiter, thermal sensor, and shutdown logic. Internal P-Channel Pass Transistor The MAX1935 features a 0.4Ω P-channel MOSFET pass transistor. Unlike similar designs using PNP pass transistors, P-channel MOSFETs require no base drive, which reduces operating current. PNP-based regulators also waste considerable current in dropout when the pass transistor saturates, and use high base-drive currents under large loads. The MAX1935 does not suffer from these problems. Output Voltage Selection The MAX1935’s dual-mode operation allows operation in either a preset voltage mode or an adjustable mode. Connect SET to GND to select the preset output voltage. The two-digit part number suffix identifies the output voltage. For example, the MAX1935ETA33 has a preset 3.3V output voltage. The output voltage can also be adjusted by connecting a voltage-divider from OUT to SET (Figure 2). Select R2 in the 25kΩ to 100kΩ range. Calculate R1 with the following equation: R1 = R2 [(VOUT / VSET) - 1] where VSET = 0.8V, and VOUT can range from 0.8V to 4.5V. Shutdown Drive SHDN low to enter shutdown. During shutdown, the output is disconnected from the input, and supply current drops to 0.02µA. When in shutdown, POK pulls low. The capacitance and load at OUT determine the rate at which VOUT decays. SHDN can be pulled as high as 6V, regardless of the input and output voltage. Power-OK Output The POK output pulls low when OUT is less than 93% of the nominal regulation voltage. Once OUT exceeds 93% of the nominal voltage, POK goes high impedance. POK is an open-drain N-channel output. To obtain a logic voltage output, connect a pullup resistor from POK to OUT. A 100kΩ resistor works well for most applications. POK can be used to signal a microcontroller (µC), or drive an external LED to indicate power failure. When the MAX1935 is shutdown, POK is held low independent of the output voltage. If unused, leave POK grounded or unconnected. Current Limit The MAX1935 monitors and controls the pass transistor’s gate voltage, limiting the output current to 1.4A (typ). The output can be shorted to ground for an indefinite period of time without damaging the part. Thermal-Overload Protection Thermal-overload protection limits total power dissipation in the MAX1935. When the junction temperature exceeds TJ = +170°C, a thermal sensor turns off the pass transistor, allowing the device to cool. The thermal sensor turns the pass transistor on again after the junction temperature cools by +20°C, resulting in a pulsed output during continuous thermal-overload conditions. Thermal-overload protection protects the MAX1935 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction-temperature rating of TJ = +150°C. Operating Region and Power Dissipation The MAX1935’s maximum power dissipation depends on the thermal resistance of the IC package and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The power dissipated in the device is P = IOUT ✕ (VIN V OUT ). The maximum allowed power dissipation is 1.95W or: PMAX = (TJ(MAX) - TA) / (θJC + θCA) where TJ - TA is the temperature difference between the MAX1935 die junction and the surrounding air, θJC is the thermal resistance from the junction to the case, and θCA is the thermal resistance from the case through the PC board, copper traces, and other materials to the surrounding air. The MAX1935 package features an exposed thermal pad on its underside. This pad lowers the package’s thermal resistance by providing _______________________________________________________________________________________ 7 MAX1935 Detailed Description MAX1935 500mA, Low-Voltage Linear Regulator in Tiny QFN VIN 2.25V TO 5.5V IN CIN 1µF IN THERMAL SENSOR MOSFET DRIVER WITH ILIM PRESET MODE OUT ON VOUT 0.8V TO 3.3V SHDN OUT OFF SHUTDOWN LOGIC COUT 10µF VREF 0.8V ERROR AMPLIFIER LOGIC SUPPLY VOLTAGE (VOUT) RPOK 100kΩ MAX1935 POK TO µC SET 93% VREF 80mV GND Figure 1. Functional Diagram a direct heat conduction path from the die to the PC board. Connect the exposed backside pad and GND to the system ground using a large pad or ground plane, or multiple vias to the ground plane layer. The MAX1935 delivers up to 0.5A(RMS) and operates with input voltages up to 5.5V, but not simultaneously. High output currents can only be sustained when inputoutput differential is within the limits outlined. output capacitors. The output capacitor’s (COUT) ESR affects stability and output noise. Use output capacitors with an ESR of 0.1Ω or less to ensure stability and optimum transient response. Surface-mount ceramic capacitors have very low ESR and are commonly available in values up to 10µF. Connect CIN and COUT as close to the MAX1935 as possible. Applications Information The MAX1935 is designed to operate with low dropout voltages and low quiescent currents, while still maintaining good noise, transient response, and AC rejection. See the Typical Operating Characteristics for a plot of Power-Supply Rejection Ratio (PSRR) vs. Frequency. When operating from noisy sources, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passivefiltering techniques. The MAX1935 load-transient Capacitor Selection and Regulator Stability Connect a 1µF capacitor between IN and ground and a 10µF low equivalent series-resistance (ESR) capacitor between OUT and ground. The input capacitor (CIN) lowers the source impedance of the input supply. Reduce noise and improve load-transient response, stability, and power-supply rejection by using larger 8 Noise, PSRR, and Transient Response _______________________________________________________________________________________ 500mA, Low-Voltage Linear Regulator in Tiny QFN MAX1935 600 IN OUT IN OUT 0.8V VIN +2.25V TO +5.5V -1 VOUT CIN 1µF COUT 10µF MAX1935 R1 ON SHDN TA = +70°C MAXIMUM OUTPUT CURRENT (A) R1 = R2 VOUT 500 400 TA = +85°C 300 200 100 SET OFF 0 0 R2 POK GND 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT-OUTPUT VOLTAGE DIFFERENCE (V) Figure 3. Power Operating Regions: Maximum Output Current vs. Input-Output Voltage Difference Figure 2. Adjustable Output Using External Feedback Resistors response graphs (see the Typical Operating Characteristics) show two components of the output response: a DC shift from the output impedance due to the load current change, and the transient response. A typical transient overshoot for a step change in the load current from 5mA to 500mA is 40mV. Increasing the output capacitor’s value and decreasing the ESR attenuates the overshoot. Input-Output (Dropout) Voltage A regulator’s minimum input-to-output voltage differential (dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the MAX1806 uses a P-channel MOSFET pass transistor, its dropout voltage is a function of drain-to-source on-resistance (RDS(ON)) multiplied by the load current (see the Typical Operating Characteristics): VDROPOUT = VIN - VOUT = RDS(ON) ✕ IOUT Chip Information TRANSISTOR COUNT: 949 _______________________________________________________________________________________ 9 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 6, 8, &10L, QFN THIN.EPS MAX1935 500mA, Low-Voltage Linear Regulator in Tiny QFN PACKAGE OUTLINE, 6, 8 & 10L, QFN THIN (DUAL), EXPOSED PAD, 3x3x0.80 mm 21-0137 C COMMON DIMENSIONS SYMBOL A MIN. 0.70 MAX. 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L k 0.20 0.40 0.25 MIN A2 0.20 REF. PACKAGE VARIATIONS PKG. CODE N D2 E2 e JEDEC SPEC b T633-1 6 1.50–0.10 2.30–0.10 0.95 BSC MO229 / WEEA 0.40–0.05 1.90 REF T833-1 8 1.50–0.10 2.30–0.10 0.65 BSC MO229 / WEEC 0.30–0.05 1.95 REF T1033-1 10 1.50–0.10 2.30–0.10 0.50 BSC MO229 / WEED-3 0.25–0.05 2.00 REF [(N/2)-1] x e PACKAGE OUTLINE, 6, 8 & 10L, QFN THIN (DUAL), EXPOSED PAD, 3x3x0.80 mm 21-0137 C 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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