MAX1577ZETA

19-3461; Rev 0; 11/04 ABLE KIT AVAIL ALUATION EV 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights General Description The MAX1577Y/MAX1577Z charge pumps drive white LEDs, including camera strobes, with regulated current up to 1.2A (guaranteed to 800mA). The very low openloop output resistance allows high flash brightness, even from a low battery input voltage. The adaptive 1x/2x regulating charge-pump operation provides high efficiency (up to 92%) while in movie mode or backlighting. Fast (1MHz) switching allows the use of tiny external components. The MAX1577Y/MAX1577Z use an external resistor to set the full-scale LED current. Two enable inputs (EN1 and EN2) provide simple on/off control and LED current of 20%, 33%, or 100% full scale. If there is less than 24mV across the external resistor, the output voltage is regulated. The MAX1577Z has fixed 5.1V output-voltage regulation, while the MAX1577Y has logic-controlled output voltage of 3.4V, 4.6V, or 5.1V for backlighting, keyboard, and RGB applications. The MAX1577Y/MAX1577Z are available in an 8-pin, 3mm x 3mm TDFN package (0.8mm max height). Features ♦ Up to 1.2A Output Drive Capability (800mA Guaranteed) ♦ Up to 92% PLED / PBATT Efficiency for Movie Mode ♦ Flexible Brightness Control Two-Bit Logic for 100%, 33%, 20%, and Off PWM for 20% to 100% ♦ 3% Current Regulation Over Line and Temperature ♦ Current or Voltage Regulation for Flash and Backlighting (MAX1577Y) ♦ Current Regulation for Flash (MAX1577Z) ♦ Low Ripple and EMI ♦ 2.7V to 5.5V Supply Voltage Range ♦ Soft-Start Limits Inrush Current ♦ Output-Voltage Regulation Mode ♦ Thermal-Shutdown Protection ♦ 8-Pin 3mm x 3mm TDFN Package MAX1577Y/MAX1577Z Applications White LED Flashes, Strobes, and Movie Lights LCD Backlighting Camera Phones, Cell Phones, and Smart Phones PDAs, Digital Cameras, and Camcorders Ordering Information PART MAX1577YETA TEMP RANGE -40°C to +85°C PINPACKAGE 8 TDFN (T833-2) 8 TDFN (T833-2) TOP MARK AMG MAX1577ZETA -40°C to +85°C AMQ Typical Operating Circuit 1µF OR 2.2µF OUT Pin Configuration GND 5 4 EN2 TOP VIEW CN 5.3V OVP OUT 10µF CS 7 2 CP CP 2.7V TO 5.5V IN 4.7µF GND UP TO 1.2A 8 MAX1577Z 100%, 33%, 20%, AND SHUTDOWN EN1 EN2 CS VOUT - (300mV OR 100mV OR 60mV) 1 EN1 MAX1577Y MAX1577Z TDFN ________________________________________________________________ Maxim Integrated Products 1 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. CN IN 6 3 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z ABSOLUTE MAXIMUM RATINGS IN, OUT, EN1, EN2 to GND ...................................-0.3V to +6.0V OUT to GND During Shutdown....................-0.3V to (VIN + 0.3V) OUT to CS .............................................................-0.6V to +0.6V CS to GND................................................-0.3V to (VOUT + 0.3V) CN to GND...................................................-0.3V to (VIN + 0.3V) CP to GND .....-0.3V to the Greater of (VOUT + 1V) or (VIN + 1V) OUT Short Circuit to GND ..........................................Continuous Continuous Power Dissipation (TA = +70°C) 8-Pin TDFN (derate 18.2mW/°C above +70°C) ..........1455mW Operating Temperature Range ...........................-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 = 3.6V, circuit of Figure 2, EN1 = EN2 = IN, RCS = 60Ω, CIN = 4.7µF, C1 = 2.2µF, COUT = 10µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER IN Operating Voltage Undervoltage-Lockout Threshold Undervoltage-Lockout Hysteresis Supply Current Shutdown Supply Current Soft-Start Time OUT Overvoltage Protection MAX1577Z, TA = +25°C, IOUT = 100mA OUT Voltage Regulation Mode MAX1577Y, TA = +25°C, IOUT = 100mA EN1 or EN2 = IN EN1 = GND, EN2 = IN EN1 = IN, EN2 = GND EN1 = EN2 = IN 4.95 3.17 4.40 4.95 1MHz switching, no load 1x LDO mode, no switching EN1 = EN2 = GND TA = +25°C TA = +85°C VIN rising CONDITIONS MIN 2.7 2.3 2.45 35 5 0.225 0.01 0.2 0.5 5.3 5.10 3.40 4.60 5.10 24 EN1 = GND, EN2 = IN CS Regulation Voltage (VOUT - VCS) CS Threshold Accuracy Maximum OUT Current Open-Loop OUT Resistance OUT Internal Pulldown in Shutdown Switching Frequency EN1 = IN, EN2 = GND EN1 = EN2 = IN TA = +25°C VIN = 2.7V to 5.5V, TA = -40°C to +85°C VLED = 4.1V, EN1 = EN2 = IN 1x LDO mode 2x mode, VIN = 3.4V EN1 = EN2 = GND 0.80 VIN = 3.1V VIN = 3.4V -2 -3 600 800 900 1200 0.6 2 5 1.0 1.25 3 60 100 300 ±0.5 +2 +3 % mA Ω kΩ MHz mV 5.25 3.60 4.80 5.25 mV V 0.3 1 TYP MAX 5.5 2.6 UNITS V V mV mA µA ms V CS Voltage-Mode Threshold (VOUT - VCS) 2 _______________________________________________________________________________________ 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z ELECTRICAL CHARACTERISTICS (continued) (VIN = 3.6V, circuit of Figure 2, EN1 = EN2 = IN, RCS = 60Ω, CIN = 4.7µF, C1 = 2.2µF, COUT = 10µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER EN_ Logic-High Voltage EN_ Logic-Low Voltage Logic Input Current Thermal-Shutdown Threshold Thermal-Shutdown Hysteresis VIN = 4.2V to 5.5V VIN = 2.7V to 4.2V VIN = 2.7V to 5.5V VEN_ = 0V or 5.5V TJ rising TA = +25°C TA = +85°C 0.02 0.02 +160 20 CONDITIONS MIN 1.6 1.4 0.4 1 TYP MAX UNITS V V µA °C °C Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. Typical Operating Characteristics (VIN = 3.6V, circuit of Figure 2, RCS = 0.27Ω, Luxeon LXCL-PWF1 LED, TA = +25°C, unless otherwise noted.) LED CURRENT vs. SUPPLY VOLTAGE MAX1577 toc01 EFFICIENCY vs. SUPPLY VOLTAGE MAX1577 toc02 BATTERY CURRENT vs. SUPPLY VOLTAGE RCS = 0.27Ω MAX1577 toc03 1200 1000 1100mA AT 3.78VF LED CURRENT (mA) 800 600 400 200 RCS = 0.27Ω 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 220mA AT 3.15VF 370mA AT 3.33VF 100 90 80 EFFICIENCY (%) 70 60 50 40 30 20 10 0 220mA AT 3.15VF RCS = 0.27Ω 2500 2000 BATTERY CURRENT (mA) 1100mA AT 3.78VF 1500 370mA AT 3.33VF 220mA AT 3.15VF 500 1000 370mA AT 3.33VF 1100mA AT 3.78VF 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) 5.5 SUPPLY VOLTAGE (V) LED CURRENT vs. SUPPLY VOLTAGE MAX1577 toc04 EFFICIENCY vs. SUPPLY VOLTAGE MAX1577 toc05 BATTERY CURRENT vs. SUPPLY VOLTAGE 1600 BATTERY CURRENT (mA) 1400 1200 1000 800 600 400 200 250mA AT 3.21VF 150mA AT 3.06VF 770mA AT 3.66VF RCS = 0.39Ω MAX1577 toc06 900 800 700 LED CURRENT (mA) 600 500 400 300 200 100 0 2.7 3.1 3.5 3.9 RCS = 0.39Ω 150mA AT 3.06VF 4.3 4.7 5.1 250mA AT 3.21VF 770mA AT 3.66VF 100 90 80 EFFICIENCY (%) 70 60 50 40 30 20 10 0 RCS = 0.39Ω 2.7 3.1 3.5 3.9 4.3 4.7 5.1 150mA AT 3.06VF 250mA AT 3.21VF 770mA AT 3.66VF 1800 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V) 5.5 5.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 3 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z Typical Operating Characteristics (continued) (VIN = 3.6V, circuit of Figure 2, RCS = 0.27Ω, Luxeon LXCL-PWF1 LED, TA = +25°C, unless otherwise noted.) LED CURRENT vs. TEMPERATURE MAX1577 toc07 LED CURRENT vs. RCS MAX1577 toc08 TYPICAL OPERATING WAVEFORMS IN 1x MODE MAX1577 toc09 225 1.2 1.0 EN1 AND EN2 HIGH LED CURRENT (A) 0.8 0.6 EN1 HIGH, EN2 LOW 0.4 EN1 LOW, EN2 HIGH 220 LED CURRENT (mA) VIN 50mV/div (AC-COUPLED) 215 VOUT 50mV/div (AC-COUPLED) 50mV/div (AC-COUPLED) 210 205 RCS = 0.27Ω EN1 LOW EN2 HIGH -40 -15 10 35 60 85 VCS 0.2 0 0.2 0.4 0.6 RCS (Ω) 0.8 1.0 400ns/div TEMPERATURE (°C) 200 TYPICAL OPERATING WAVEFORMS IN 2x MODE MAX1577 toc10 STARTUP AND SHUTDOWN RESPONSE MAX1577 toc11 VIN 50mV/div (AC-COUPLED) VEN1, VEN2 2V/div VOUT 50mV/div (AC-COUPLED) VLED 2V/div 0V VCS 50mV/div (AC-COUPLED) ILED 500mA/div 0mA 400ns/div 400µs/div LED CURRENT vs. PWM DUTY CYCLE MAX1577 toc12 EFFICIENCY vs. SUPPLY VOLTAGE WITH PWM DIMMING 70 25% 60 EFFICIENCY (%) MAX1577 toc13 DIMMING RESPONSE MAX1577 toc14 1200 1000 LED CURRENT (mA) 800 600 400 200 0 0 20 40 60 80 RCS = 0.27Ω EN1 PWM EN2 HIGH 80 VEN1 2V/div 50 40 50% 30 20 10 0 2.7 3.1 3.5 3.9 4.3 75% RCS = 0.27Ω EN1 PWM EN2 HIGH 4.7 5.1 5.5 ILED VLED 2V/div 0V 500mA/div 0mA 100µs/div 100 DUTY CYCLE (%) SUPPLY VOLTAGE (V) 4 _______________________________________________________________________________________ 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights Pin Description PIN 1 2 3 4 5 6 7 8 — NAME EN1 CP CN EN2 GND IN CS OUT EP Control Logic Input (see Table 1) Transfer Capacitor Positive Connection. Connect a 1µF capacitor (or 2.2µF for IOUT > 600mA) from CP to CN. Transfer Capacitor Negative Connection. Connect a 1µF capacitor (or 2.2µF for IOUT > 600mA) from CP to CN. Control Logic Input (see Table 1) Ground Input Supply Voltage. Connect IN to a battery or supply voltage from 2.7V to 5.5V. Connect a 4.7µF ceramic capacitor from IN to GND. Current-Sense Input. Connect a current-sense resistor from OUT to CS to set the output current. Connect the anodes of the LEDs to CS and the cathodes to GND. Output. Connect a 10µF ceramic capacitor from OUT to GND. In shutdown, OUT is pulled to GND with an internal 5kΩ resistor. Exposed Pad. Connect the exposed pad to GND directly under the IC. FUNCTION MAX1577Y/MAX1577Z Table 1. Enable, Dimming, Voltage Mode, and Overvoltage Protection EN1 0 0 1 1 EN2 0 1 0 1 DIMMING LEVEL Shutdown 20% Current 33% Current 100% Current CS THRESHOLD (VOUT - VCS) — 60mV 100mV 300mV VOLTAGE MODE MAX1577Z — 5.10V 5.10V 5.10V MAX1577Y — 3.40V 4.60V 5.10V MAX1577Z — 5.30V 5.30V 5.30V OVP MAX1577Y — 5.15V 5.17V 5.30V Note: A “0” indicates EN_ is logic low or connected to GND. A “1” indicates EN_ is logic high or connected to IN. _______________________________________________________________________________________ 5 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z C1 1µF* CP CN 2.7V TO 5.5V IN OUT LDO/CHARGE PUMP COUT 10µF ERROR AMP CSVMODE CIN 4.7µF GND VOUT - VCS EN1 EN2 CONTROL MAX1577Y ONLY RCS IMODE/ VMODE MUX 1.25V MAX1577Y MAX1577Z 24mV CS D1 *2.2µF FOR MORE THAN 600mA OUTPUT. Figure 1. Functional Diagram 6 _______________________________________________________________________________________ 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z C1 2.2µF* CP 2.7V TO 5.5V CIN 4.7µF IN GND CN 5.3V OVP OUT COUT 10µF RCS UP TO 1.2A OR MAX1577Z EN1 EN2 CS VOUT - (300mV OR 100mV OR 60mV) 100%, 33%, 20%, AND SHUTDOWN *1µF FOR LESS THAN 600mA OUTPUT. Figure 2. Current Regulation with the MAX1577Z C1 1µF CP 2.7V TO 5.5V CIN 4.7µF IN GND CN 5.1V, 4.6V, OR 3.4V OUT COUT 10µF MAX1577Y EN1 EN2 CS 5.1V, 4.6V, 3.4V AND SHUTDOWN Figure 3. Voltage Regulation with the MAX1577Y _______________________________________________________________________________________ 7 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z C1 2.2µF* CP 2.7V TO 5.5V CIN 4.7µF IN GND CN 5.3V OVP UP TO 1.2A OUT CIN 10µF RCS 5.1V, 4.6V, OR 3.4V MAX1577Y 5.1V OR 100% CURRENT, 4.6V OR 33% CURRENT, 3.4V OR 20% CURRENT, AND SHUTDOWN EN1 EN2 CAMERA-FLASH MOVIE LIGHT *1µF FOR LESS THAN 600mA OUTPUT. CS VOUT - (300 OR 100 OR 60mV) MAIN DISPLAY BACKLIGHT SUBDISPLAY BACKLIGHT RGB DRIVER ASIC Figure 4. Flash and Backlighting with the MAX1577Y Detailed Description 1x LDO to 2x Mode Switchover When V IN is greater than V OUT , the MAX1577Y/ MAX1577Z are in 1x LDO mode and regulate the current through R CS . As V IN decreases and the LDO approaches dropout, the 2x charge pump starts boosting the output to maintain the regulation current. When VIN rises enough above VOUT to maintain LDO regulation, the charge pump stops and the MAX1577Y/MAX1577Z switch back to the more efficient 1x LDO mode. start is terminated and normal operation begins in 1x mode. Otherwise, after 500µs, the 2x charge-pump softstart operates until the voltage across the sense resistor reaches the current regulation threshold, the output voltage is in regulation, or 500µs has elapsed, whichever occurs first. If the output is shorted to ground, soft-start is repeated until the output exceeds 2.3V. Dimming and Shutdown The MAX1577Y/MAX1577Z use two inputs (EN1 and EN2) to select between three brightness levels and lowpower shutdown mode (see Table 1). By regulating the voltage across the current-sense resistor (VOUT - VCS) to one of three levels, the MAX1577Y/MAX1577Z control the output current, thus providing the three-level dimming. In shutdown mode, the IC is turned off, reducing the supply current to 0.01µA (typ). When the MAX1577Y/MAX1577Z are shut down, C1 is discharged and the output is pulled to GND through an internal 5kΩ resistor. Soft-Start The MAX1577Y/MAX1577Z include soft-start circuitry to limit inrush current at turn-on. When starting up with an output voltage that is not near the input voltage, the output capacitor is charged directly from the input with a ramped current source (with no charge-pump action) until the output voltage approaches the input voltage. If current-mode or voltage-mode regulation is met, soft- 8 _______________________________________________________________________________________ 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights Overvoltage Protection Output overvoltage protection (OVP) protects the IC and other components in case the output is open circuit. The MAX1577Z always limits the output voltage to 5.3V. With the MAX1577Y, the output OVP voltage varies slightly depending on the state of the EN_ inputs (see Table 1). Applications Information Setting the Output Current For applications requiring a regulated output current, see the circuit of Figure 2. The output regulation current is set by RCS as follows: RCS = (VOUT - VCS) / IOUT where IOUT is the output current (up to 1200mA) and (VOUT - VCS) is the current-sense threshold (see Table 1). For camera-flash applications with a short pulse duration, a 0.25W resistor is recommended. MAX1577Y/MAX1577Z Output-Voltage Regulation Mode When the voltage across the sense resistor (VOUT VCS) is less than 24mV, the MAX1577Y/MAX1577Z regulate the output voltage. For applications requiring a fixed output voltage instead of current regulation, simply connect CS directly to OUT as shown in Figure 3. The MAX1577Z regulates to a fixed 5.1V. The adjustable regulation voltage (3.4V, 4.6V, or 5.1V) of the MAX1577Y depends on the state of the EN_ inputs (see Table 1). Setting the Output Voltage To regulate the output voltage instead of the current, connect CS directly to the output as shown in Figure 3. In this configuration the MAX1577Z regulates the output to 5.1V. The output voltage of the MAX1577Y is set to 5.1V, 4.6V, or 3.4V using the EN1 and EN2 inputs as shown in Table 1. Thermal Protection Thermal protection prevents damage to the IC during overload conditions. When the die temperature exceeds +160°C, the MAX1577Y/MAX1577Z turn off until the die cools by 20°C. Once the die has cooled, the MAX1577Y/MAX1577Z turn on and initiate soft-start. During a continuous overload, this produces a pulsed output. Continous operation at high-output-current settings may induce thermal protection. Ceramic capacitors are recommended due to their low equivalent series resistance (ESR), small size, and low cost. Select capacitors that maintain their capacitance over temperature and DC bias. Typically X5R, X7R, or better ceramic capacitors perform well. A 4.7µF input capacitor and 10µF output capacitor are recommended for most applications. Larger values can be used to reduce ripple. For the transfer capacitor (C1), a 1µF capacitor is suitable for output currents up to 600mA. For output currents between 600mA and 1200mA, use a 2.2µF capacitor. Driving Camera Strobe/Flash In applications that do not require dimming, such as a camera strobe/flash, connect EN1 and EN2 together and drive as a single on/off control input. Pulse this input high to generate a strobe output. PWM Dimming To vary the brightness from 20% to 100% using pulsewidth modulation (PWM), hold EN2 high and apply the PWM signal (up to 5kHz) to EN1. Holding EN2 high keeps the part enabled and prevents repeated softstarts. The duty cycle of the PWM signal applied to EN1 controls the brightness, where 0% duty cycle corresponds to 20% brightness and 100% duty cycle corresponds to 100% brightness. A PWM signal with a logic-high voltage between 1.6V and 5.5V can be safely used regardless of the input voltage. The voltage of the PWM signal does not affect the brightness level. For highest movie-mode efficiency, it is best to choose R CS so 0% PWM duty cycle provides the desired movie-mode current. Then, the flash current level is adjusted by the PWM duty cycle. When the moviemode current is more than 33% of the flash current, it is more efficient to apply the PWM dimming signal to EN2 while holding EN1 high. Capacitor Selection Input Ripple In 1x LDO mode there is no charge-pump switching, and thus very little input ripple. The input ripple in 2x charge-pump mode depends on the input source impedance. Typical waveforms showing the ripple in 1x and 2x mode are in the T ypical Operating Characteristics. In sensitive applications, increase the input capacitance to reduce input ripple. Ballast Resistors for Multiple LEDs When using multiple parallel LEDs, add a ballast resistor in series with each LED to help balance the current between the LEDs. When using current regulation _______________________________________________________________________________________ 9 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights MAX1577Y/MAX1577Z (Figure 2), the ballast resistors must be small enough to prevent triggering the overvoltage protection: RBALLAST < (5.1V - VF) / ILED where ILED is the current through each LED and VF is the forward voltage of the LED at ILED. Within this limit, larger values of RBALLAST improve LED-to-LED matching but also increase the input voltage where the 2x charge pump makes the transition to the more efficient 1x LDO mode. When using voltage regulation (Figure 3), select the ballast resistors based on the full brightness setting as follows: With EN1 high and EN2 high: RBALLAST = (5.1V - VF) / ILED The LED current at the dimmed settings are calculated as follows: with EN1 high and EN2 low: ILED = (4.6V - VF) / RBALLAST with EN1 low and EN2 high: ILED = (3.4V - VF) / RBALLAST Note that VF varies as a function of ILED. Typically, LED manufacturers provide a plot of forward voltage (VF) vs. forward current (ILED) in the LED data sheet. PC Board Layout and Routing The MAX1577Y/MAX1577Z are high-frequency switched-capacitor regulators. For best circuit performance, use a solid ground plane and place CIN, COUT, and C1 as close to the IC as possible. Connect the exposed pad to GND directly under the IC and allow sufficient copper area for cooling. Refer to the MAX1577Z evaluation kit for an example PC board layout. Chip Information TRANSISTOR COUNT: 2482 PROCESS: BiCMOS 10 ______________________________________________________________________________________ 1.2A White LED Regulating Charge Pump for Camera Flashes and Movie Lights 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, DFN THIN.EPS MAX1577Y/MAX1577Z D N PIN 1 INDEX AREA E DETAIL A E2 C L C L L A e e L 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 COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 MAX. 0.80 3.10 3.10 0.05 0.40 0.20 0.25 MIN. 0.20 REF. PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 T1433-1 T1433-2 N 6 8 10 14 14 D2 1.50±0.10 1.50±0.10 1.50±0.10 1.70±0.10 1.70±0.10 E2 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 2.30±0.10 e 0.95 BSC 0.65 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 ------b 0.40±0.05 0.30±0.05 0.25±0.05 0.20±0.03 0.20±0.03 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF 2.40 REF 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.