19-3458; Rev 0; 10/04 0.075A to 1.5A, Programmable Current-Limit Switch Features ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ The MAX4766 is a programmable current-limit switch that uses a proprietary control topology to provide a ±10% accurate current limit. It operates from 2.25V to 4.5V input voltage. The current limit is resistor settable from 0.075A to 1.5A and features an adjustable soft-start function to control the output-voltage ramp rate, thereby limiting the inrush current. It also has an adjustable blanking time to accommodate various capacitive loads. If the load current is greater than the current-limit threshold, the current limiter handles the overcurrent situation in one of three ways depending on the option selected. It enters an autoretry mode (MAX4766A), latches off the switch (MAX4766B), or places the device in a continuous current-limit mode (MAX4766C). Additional safety features include thermal shutdown to prevent overheating and reverse-current blocking to prevent current from being driven back into the source. ±10% Accurate Current Limit 0.075A to 1.5A Programmable Current Limit Inrush Current Protection Thermal Shutdown Protection Reverse-Current Protection Low Dropout Voltage Programmable Blanking Time Programmable Soft-Start Time FLAG Function (MAX4766B/MAX4766C) Tiny 8-Pin TDFN Package (3mm x 3mm) 2.25V to 4.5V Supply Range Typical Operating Circuit The MAX4766 is available in a tiny 8-pin 3mm x 3mm TDFN package and operates over the extended temperature range of -40°C to +85°C. 2.25V TO 4.5V Applications SDIO Ports Notebook Computers IN PDAs and Palmtop Devices Cell Phones OUT ON µP FLAG* MAX4766 SETB SETI Pin Configuration SETS TOP VIEW GND SETB 1 FLAG 2 SETI 3 *MAX4766B/C 8 GND 7 ON MAX4766 OUT 4 6 SETS 5 IN TDFN Ordering Information/Selector Guide TOP MARK PKG CODE SOFT-START/ BLANKING 8 TDFN AKV T833-1 Programmable Autoretry 8 TDFN AKW T833-1 Programmable Latch-Off 8 TDFN AKX T833-1 Programmable Continuous PART TEMP RANGE PIN-PACKAGE MAX4766AETA -40°C to +85°C MAX4766BETA -40°C to +85°C MAX4766CETA -40°C to +85°C OVERCURRENT RESPONSE ________________________________________________________________ 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 MAX4766 General Description MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch ABSOLUTE MAXIMUM RATINGS IN, OUT, ON, FLAG to GND .....................................-0.3V to +5V SETB, SETS, SETI to GND ...........................-0.3V to (VIN + 0.3V) IN to OUT ...............................................................................±5V OUT Short-Circuit Duration ........................................Continuous Continuous Switch Current .................................................1.75A Current into any Pin (Except IN, OUT)..............................±20mA Continuous Power Dissipation (TA = +70°C) 8-Pin TDFN (derate 18.2mW/°C above +70°C)...455mW (T833-1) Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Human Body Model ESD Protection ....................................±2kV 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 = 2.25V to 4.5V, COUT = 2.2µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Operating Voltage Range Undervoltage Lockout SYMBOL CONDITIONS VIN VUVLO MIN VIN rising 1.6 Undervoltage Lockout Hysteresis Quiescent Current Shutdown Current Current Limit 2 TYP 2.25 MAX UNITS 4.5 V 2.0 125 IQ ISHDN ILIM V mV IOUT = 0, switch on, RSETI = 0Ω (ILIMIT = 1.5A) 35 85 IOUT = 0, switch on, RSETI = 200.9kΩ (ILIMIT = 0.56A) 95 135 IOUT = 0, switch on, RSETI = 1500kΩ (ILIMIT = 0.075A) 75 120 VIN = 3.6V, VON = 0, VOUT = 0V, TA = +25°C 0.1 VIN = 3.6V, VON = 0, VOUT = 0V, TA = +85°C 13.5 VIN = 4.0V, VON = 0, VOUT = 0V, TA = +25°C 0.12 VIN = 4.0V, VON = 0, VOUT = 0V, TA = +85°C 18 µA µA VOUT = 0V, RSETI = 0Ω (VIN = 2.25 to 4.0V) 1.35 1.50 1.67 VOUT = 0V, RSETI = 200.9kΩ (VIN = 2.25 to 4.0V) 537 590 640 VOUT = 0V, RSETI = 1500kΩ (VIN = 2.25 to 3.6V) 73 79.5 85.5 VOUT = 0V, RSETI = 1500kΩ (VIN = 2.25 to 4.0V) 73 80 87 A mA _______________________________________________________________________________________ 0.075A to 1.5A, Programmable Current-Limit Switch (VIN = 2.25V to 4.5V, COUT = 2.2µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS 0.075A ≤ ILIMIT ≤ 1.5A, VOUT = 0V RSETI ILIM Product Switch Dropout Voltage (Note 2) Forward-Off Switch Leakage Current Reverse Leakage Current (Device Disabled) Reverse Leakage Current (Device Enabled) IOUT(OFF) IINR(OFF) IINR(OFF) MIN TYP MAX UNITS 101 112.5 124 kV VON = VIN = 3V, IOUT = 0.9 x ILIMIT(min), RSETI = 0Ω (typical ILIMIT = 1.5A) 290 VON = VIN = 3V, IOUT = 0.33 x ILIMIT(min), RSETI = 0Ω (typical ILIMIT = 1.5A) 105 VON = VIN = 3V, IOUT = 0.9 x ILIMIT(min), RSETI = 200.9kΩ (typical ILIMIT = 0.56A) 245 VIN = 3.6V, VON = 0V, VOUT = 0V, TA = +25°C 0.1 VIN = 3.6V, VON = 0V, VOUT = 0V, TA = +85°C 13.5 VIN = 4.0V, VON = 0V, VOUT = 0V, TA = +25°C 0.12 VIN = 4.0V, VON = 0V, VOUT = 0V, TA = +85°C 18 VIN = 0V, VOUT = 3.6V, VON = 0V, TA = +25°C 0.1 VIN = 0V, VOUT = 3.6V, VON = 0V, TA = +85°C 13.8 VIN = 0V, VOUT = 4.0V, VON = 0V, TA = +25°C 0.125 VIN = 0V, VOUT = 4.0V, VON = 0V, TA = +85°C 18 mV µA µA VIN = 0V, VOUT = 3.6V, VON = VOUT, TA = +25°C 0.17 VIN = 0V, VOUT = 3.6V, VON = VOUT, TA = +85°C 30 VIN = 0V, VOUT = 4.0V, VON = VOUT, TA = +25°C 0.22 VIN = 0V, VOUT = 4.0V, VON = VOUT, TA = +85°C 40 µA ON LOGIC ON Logic-High Voltage VIH ON Logic-Low Voltage VIL 1.4 V 0.6 V _______________________________________________________________________________________ 3 MAX4766 ELECTRICAL CHARACTERISTICS (continued) ELECTRICAL CHARACTERISTICS (continued) (VIN = 2.25V to 4.5V, COUT = 2.2µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS FLAG OUTPUT LOGIC FLAG Output Logic-Low Voltage VOL ISINK = 1mA FLAG Output High Leakage Current VIN = V FLAG = 5.5V 0.4 V 1 µA THERMAL PROTECTION Thermal Shutdown VIN = 3.3V, junction temperature rising 150 °C Thermal Shutdown Hysteresis VIN = 3.3V 15 °C DYNAMIC Turn-On Time (Note 3) Turn-Off Time TSS CSETS = 0.01µF 9 17.5 ms TOFF VON from high to low; RL = 10Ω, RSET = 0, VIN = 3.3V 75 150 µs VIN = 4V, RSET = 0Ω, output high and then short-circuit applied 1 Current-Limit Reaction Time Blanking Time tBLANK 5 CSETB = 0.01µF Retry Time µs 3.5 6.75 11.5 ms 225 420 700 ms Note 1: All parameters tested at TA = +25°C. Limits through the temperature range are guaranteed by design. Note 2: Not production tested. Guaranteed by design. Note 3: Turn-on time (also called soft-start time) is defined as the difference in the time between when the output crosses 10%, and 90% of the final output voltage. Typical Operating Characteristics (VIN = 3.3V, COUT = 2.2µF, RSETI = 0kΩ, TA = +25°C, unless otherwise noted.) CURRENT LIMIT vs. SUPPLY VOLTAGE CURRENT LIMIT vs. TEMPERATURE VCC = 3V 9 CURRENT LIMIT (A) 1.50 BLANKING TIME (ms) 1.55 1.55 1.50 MAX4766 toc03 10 MAX4766 toc02 VCC = 3V BLANKING TIME vs. TEMPERATURE 1.60 MAX4766 toc01 1.60 CURRENT LIMIT (A) MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch 8 7 1.45 1.45 6 1.40 1.40 2.25 3.00 3.75 SUPPLY VOLTAGE (V) 4 4.50 -40 -15 10 35 TEMPERATURE (°C) 60 85 5 -40 -15 10 35 TEMPERATURE (°C) _______________________________________________________________________________________ 60 85 0.075A to 1.5A, Programmable Current-Limit Switch CURRENT-LIMIT RESPONSE CURRENT-LIMIT RESPONSE MAX4766 toc04a MAX4766 toc04b 2A OF LOAD APPLIED AT THE OUTPUT SUDDEN SHORT APPLIED AT THE OUTPUT OUTPUT 2V/div OUTPUT 2V/div OUTPUT LOAD 1A/div OUTPUT LOAD 2A/div 10µs/div 10µs/div QUIESCENT SUPPLY CURRENT vs. SUPPLY VOLTAGE 80 70 RISET OPEN 2.25 3.00 RISET OPEN 4 3 2 1 0 -40 -15 10 35 60 -40 85 -15 10 35 60 85 VOLTAGE (V) TEMPERATURE (°C) SHUTDOWN LEAKAGE CURRENT vs. TEMPERATURE REVERSE SHUTDOWN LEAKAGE CURRENT vs. TEMPERATURE REVERSE SHUTDOWN LEAKAGE CURRENT vs. TEMPERATURE 2 1 VON = 0V 4 3 2 1 0 0 -15 10 35 TEMPERATURE (°C) 60 85 -40 -15 10 35 TEMPERATURE (°C) 60 85 8 MAX4766 toc10 MAX4766 toc09 MAX4766 toc08 3 5 REVERSE SHUTDOWN LEAKAGE CURRENT (µA) VOLTAGE (V) 4 -40 MAX4766 toc07 MAX4766 toc06 RISET = 0Ω 60 50 40 30 20 4.50 3.75 5 SHUTDOWN LEAKAGE CURRENT (µA) 110 100 90 80 70 5 SHUTDOWN SUPPLY CURRENT ( µA) SUPPLY CURRENT ( µA) 100 90 60 50 40 30 20 140 130 120 MAX4766 toc05 RISET = 0Ω 130 120 110 REVERSE SHUTDOWN LEAKAGE CURRENT (µA) SUPPLY CURRENT ( µA) 140 SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE QUIESCENT SUPPLY CURRENT vs. SUPPLY VOLTAGE VON = VCC 7 6 5 4 3 2 1 0 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 5 MAX4766 Typical Operating Characteristics (continued) (VIN = 3.3V, COUT = 2.2µF, RSETI = 0kΩ, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VIN = 3.3V, COUT = 2.2µF, RSETI = 0kΩ, TA = +25°C, unless otherwise noted.) TURN-ON TIME TURN-OFF TIME MAX4766 toc11 MAX4766 toc12 INPUT INPUT OUTPUT OUTPUT 4ms/div 2ms/div FLAG RESPONSE TIME (OVERLOAD CONDITION) SWITCH DROPOUT VOLTAGE vs. TEMPERATURE MAX4766 toc13 VCC = 3V 215 OUTPUT LOAD 1A/div OUTPUT 2V/div FLAG 5V/div MAX4766 toc14 225 DROPOUT VOLTAGE (mV) MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch 205 195 185 175 165 155 145 135 125 2ms/div -40 -15 10 35 60 85 TEMPERATURE (°C) 6 _______________________________________________________________________________________ 0.075A to 1.5A, Programmable Current-Limit Switch PIN MAX4766B/C MAX4766A 1 1 NAME FUNCTION SETB Blanking Time Adjust. Connect a capacitor from SETB to ground to program the blanking time. See the Adjustable Blanking Time section. Leave SETB floating to choose 1ms minimum preset blanking time. 2 — FLAG Fault-Present-Indicator Output. FLAG is an open-drain output and goes low when the overload fault duration exceeds the blanking time, reverse current is detected, or the device is in thermal shutdown. Connect FLAG to IN with a 5kΩ resistor. For latch-off (MAX4766B) versions, the switch is turned off and FLAG output goes low after the blanking time. For the continuous version (MAX4766C), FLAG does not wait for the blanking time and goes low as soon as the current-limit threshold is reached. — 2 N.C. Not Connected 3 3 SETI Current-Limit Adjust. To program the current limit, connect a resistor from SETI to ground. See the Setting the Current Limit Section for more detail. Shorting SETI to ground sets the device for maximum current limit of 1.5A. 4 4 OUT 5 5 IN 6 6 SETS 7 7 ON 8 8 GND Switch Output. Bypass OUT with a 2.2µF capacitor to ground. Power Input. Bypass IN with a 2.2µF or greater ceramic capacitor to ground. Larger capacitors may be needed to prevent large load transients from dragging down the supply voltage. Soft-Start Adjust. Connect a capacitor from SETS to ground to program the soft-start time. See the Adjustable Soft-Start section. Leave SETS floating to choose 1ms minimum preset soft-start time. Active-High Switch On Input. Drive ON high to turn the switch on. Ground REVERSECURRENT PROTECTION MAX4766 IN OUT THERMAL SHUTDOWN UVLO CONTROL LOGIC BUFFER FLAG (MAX4766B/C) SETB TBLANK SOFT-START SETS BANDGAP REFERENCE CURRENT LIMIT SETI V TO I ON Figure 1. Functional Diagram _______________________________________________________________________________________ 7 MAX4766 Pin Description MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch Programmable Blanking Time (MAX4766A/MAX4766B) Detailed Description The MAX4766 is a current-limit switch that operates from a 2.25V to 4.5V input voltage range and has a programmable current limit from 0.075A to 1.5A with a ±10% accurate current limit. The device features an adjustable blanking time, an adjustable soft-start time, and an output indicator, FLAG, that notifies the processor when a fault condition is present (Figure 1). The MAX4766 is available in latch-off, autoretry, and continuous current-limit versions (see the Selector Guide). Programmable Current Limit A resistor from SETI to GND programs the current limit for the switch (see the Setting the Current Limit section). The MAX4766 increases the pass transistor’s gate drive when the programmed current-limit value is reached. If the load current exceeds the current limit for longer than the tBLANK period, the switch either goes into autoretry, latches off, or stays in the continuous mode until the thermal limit is reached. The adjustable fault-blanking time feature of the MAX4766 ensures that no fault signal asserts during power-up or when there is a momentary short caused by hot-swapping a capacitive load. An external capacitor from SETB to GND sets the blanking time. When a short or load transient causes the device to enter current limit, an internal counter monitors the duration of the fault after the soft-start time elapses. For the MAX4766B, FLAG signal asserts low when load faults exceed the programmed blanking time (tBLANK). If the fault condition is removed before the programmed blanking time period has elapsed, the timer resets and the FLAG signal does not assert (see Figures 2a and 2b). Only current-limit and short-circuit faults are blanked. Table 1. Blanking Time vs. Capacitor Values CSETB (µF) TYPICAL BLANKING TIME (ms) Open 0.01 0.025 0.05 0.075 0.1 0.125 0.150 0.175 0.2 0.25 1 8 19 35 50 65 80 100 115 125 150 Programmable Soft-Start The MAX4766 features an adjustable soft-start time to control the output voltage ramp rate, thereby limiting the inrush surge current. An external capacitor from SETS to GND sets the soft-start time. The value of the capacitor directly determines the typical soft-start time. Use the following formula to determine the soft-start time: Soft − Start(ms) = CSETS × 1ms 1nF Leave SETS floating to choose 1ms minimum preset soft-start time. tBLANK tBLANK tBLANK LOAD CURRENT LOAD CURRENT ON SWITCH STATUS OFF ON SWITCH STATUS OFF ON VOLTAGE FLAG STATUS Figure 2a. Latch-Off Fault Blanking (Toggling ON) 8 tBLANK VIN UNLO FLAG PIN STATUS Figure 2b. Latch-Off Fault Blanking (Cycling IN Below UVLO) _______________________________________________________________________________________ 0.075A to 1.5A, Programmable Current-Limit Switch tBLANK tBLANK tRETRY tBLANK CURRENT LIMIT SHORT REMOVED LOAD CURRENT ON SWITCH STATUS OFF Reverse-Current Protection Figure 3. Autoretry Fault-Blanking Diagram Autoretry (MAX4766A) When the forward current-limit threshold is exceeded, the tBLANK timer begins counting (Figure 3). The timer resets if the overcurrent condition disappears before tBLANK has elapsed. A retry time delay (tRETRY) starts immediately after tBLANK has elapsed and during that time, the switch turns off. At the end of tRETRY, the switch turns on again. If the fault still exists, the cycle repeats. If the fault has been removed, the switch stays on. The autoretry feature saves system power in the case of an overcurrent or short-circuit condition. During tBLANK, when the switch is on, the supply current is at the current limit. During tRETRY, when the switch is off, the current through the switch is zero. Instead of observing the full load current, the switch sees the equivalent load current times duty cycle or: ⎛ ⎞ tBLANK ⎟ ⎝ tBLANK + tRETRY ⎠ ISUPPLY = ILOAD ⎜ With a typical t BLANK = 15ms and typical t RETRY = 150ms, the duty cycle is 10%, which results in a 90% power savings over the switch being on the entire time. Continuous Current Limit In the continuous current-limit version of the MAX4766, the output stays at the current limit until the output load reduces. In this case, FLAG asserts as soon as there is current limit without waiting for blanking time and deasserts as soon as a short-circuit condition is removed. In this current mode, if the thermal power rating of the package is exceeded, the device will go into thermal shutdown and will not operate until the die temperature has cooled. The MAX4766 features a reverse-current protection circuitry to limit the current back flow to 1µA when the output voltage exceeds the input voltage by a 100mV. During this period, the switch turns off and FLAG asserts (MAX4766B/C) without waiting for tBLANK time to elapse. If at this point the output voltage drops below input +100mV, the switch turns on and FLAG deasserts (MAX4766B/C). Thermal Shutdown A thermal-shutdown circuitry protects the devices from overheating. The switch turns off and FLAG goes (MAX4766B/C) low immediately (no fault blanking) when the junction temperature exceeds +150°C. The MAX4766B (latch-off) does not turn on again until ON is cycled from high to low to high. The MAX4766A (autoretry) and the MAX4766C (continuous) turn the switch on again after the device temperature drops approximately +15°C. FLAG Indicator FLAG is an open-drain fault indicator output and requires an external pullup resistor to a DC supply (usually IN). FLAG goes low when any of the following conditions occur: • The device is in current limit for more than the faultblanking period in the case of MAX4766B. • The device is in current limit in the case of MAX4766C (no blanking time). • The switch is in autoretry mode. • The OUT voltage is above the IN voltage by more than 100mV. • The die temperature exceeds the thermal-shutdown temperature limit of the +15°C. _______________________________________________________________________________________ 9 MAX4766 Latch-Off When the forward current-limit threshold is exceeded, tBLANK timer begins counting. The timer resets if the overcurrent condition disappears before tBLANK has elapsed. The switch turns off and FLAG asserts if the overcurrent condition continues beyond the blanking time. Reset the switch by either toggling ON (Figure 2a) or cycling the input voltage (Figure 2b). MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch Table 2. Current Limit vs. Resistor Values RSETI (kΩ) TYPICAL CURRENT LIMIT (A) 1500 0.075 1125 0.1 750 0.15 562.5 0.2 ⎛ IFWD _ MIN × tBLANK ⎞ ⎟ VIN ⎝ ⎠ CMAX = ⎜ 330 0.375 200.9 0.56 Layout and Thermal Dissipation 150 0.75 To optimize the switch response time to output shortcircuit conditions, it is very important to keep all traces as short as possible to reduce the effect of undesirable parasitic inductance. Place input and output capacitors as close as possible to the device (no more than 5mm). IN and OUT pins must be connected with short traces to the power bus. During normal operation, the power dissipation is small and the package temperature change is minimal. If the output is continuously shorted to ground at the maximum supply voltage, the operation of the switches with the autoretry option does not cause problems because the total power dissipated during the short is scaled by the duty cycle: 112.5 1.0 90 1.25 80.35 1.4 ≤75 1.5 Applications Information Setting the Current Limit A resistor from SETI to ground programs the currentlimit value for the MAX4766. Table 2 lists various current limits set by different resistor values. Use the following formula to calculate the current limit: ⎛ 112.5kV ⎞ ⎟ kΩ ⎝ ILIM( A) ⎠ RSETI = ⎜ Input Capacitor Connect a capacitor from IN to ground to limit the input voltage drop during momentary output short-circuit conditions. A 2.2µF ceramic capacitor with less than 0.2Ω ESR is adequate for most applications. Higher capacitor values further reduce the voltage drop at the input. Output Capacitor For stable operation over the full temperature range and over the full-programmable current-limit range, use a 2.2µF capacitor with less than 0.2Ω ESR from OUT to ground. 10 If the load capacitance is too large, then current may not have enough time to charge the capacitance and the device assumes that there is a faulty load condition. The maximum capacitive load value that can be driven from OUT is obtained by the following formula: ⎛ VIN _ MAX × IOUT _ MAX × tBLANK ⎞ ⎟ tRETRY + tBLANK ⎝ ⎠ PMAX = ⎜ Attention must be given to the latch-off version of the MAX4766 where the latch-off condition must be manually reset by toggling ON from high to low. If the latchoff time duration is not sufficiently high, it is possible for the device to reach the thermal shutdown threshold and never be able to turn the device on until it cools down. Chip Information TRANSISTOR COUNT: 1544 PROCESS: CMOS ______________________________________________________________________________________ 0.075A to 1.5A, Programmable Current-Limit Switch 6, 8, &10L, DFN THIN.EPS D N PIN 1 INDEX AREA E E2 DETAIL A CL CL L A L e e PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY 21-0137 F 1 2 ______________________________________________________________________________________ 11 MAX4766 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.) MAX4766 0.075A to 1.5A, Programmable Current-Limit Switch Package Information (continued) (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.) COMMON DIMENSIONS SYMBOL A MIN. 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 L 0.00 0.05 k MAX. 0.40 0.20 0.25 MIN. A2 0.20 REF. PACKAGE VARIATIONS PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e 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 T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.03 2.40 REF T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.03 2.40 REF PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm 21-0137 F 2 2 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.