MAX1605ETT-T

19-1666; Rev 1; 10/03 30V Internal Switch LCD Bias Supply General Description The MAX1605 boost converter contains a 0.5A internal switch in a tiny 6-pin SOT23 package. The IC operates from a +2.4V to +5.5V supply voltage, but can boost battery voltages as low as 0.8V up to 30V at the output. The MAX1605 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 0.5A MOSFET reduces external component count, and a high switching frequency (up to 500kHz) allows for tiny surface-mount components. The current limit can be set to 500mA, 250mA, or 125mA, allowing the user to reduce the output ripple and component size in low-current applications. Additional features include a low quiescent supply current and a shutdown mode to save power. The MAX1605 is ideal for small LCD panels with low current requirements, but can also be used in other applications. A MAX1605EVKIT evaluation kit (EV kit) is available to help speed up design time. o Adjustable Output Voltage up to 30V o 20mA at 20V from a Single Li+ Battery o 88% Efficiency o Up to 500kHz Switching Frequency o Selectable Inductor Current Limit (125mA, 250mA, or 500mA) o 18µA Operating Supply Current o 0.1µA Shutdown Current o Avaiable in Two Small Packages 6-Pin TDFN 6-Pin SOT23 Features MAX1605 Applications LCD Bias Generators Cellular/Cordless Phones Palmtop Computers Personal Digital Assistants (PDAs) Organizers Handy Terminals PART MAX1605EUT-T MAX1605ETT-T Ordering Information TEMP RANGE -40°C to +85°C -40°C to +85°C PINPACKAGE 6 SOT23-6 6 TDFN SOT MARK AAHP ABW Typical Operating Circuit VIN = 0.8V TO VOUT L1 10µH Pin Configuration TOP VIEW SHDN 1 6 FB SHDN VCC 1 2 3 6 5 4 FB LIM VCC = 2.4V TO 5.5V VOUT = VIN TO 30V VCC MAX1605 GND 3 4 LX LX VCC 2 MAX1605 5 LIM MAX1605 GND LX LIM ON OFF SHDN FB SOT23 GND TDFN 3mm ✕ 3mm ________________________________________________________________ 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. 30V Internal Switch LCD Bias Supply MAX1605 ABSOLUTE MAXIMUM RATINGS VCC, FB, LIM, SHDN to GND....................................-0.3V to +6V LX to GND ..............................................................-0.3V to +32V Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 8.7mW/°C above +70°C) ...........696mW 6-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW 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 (VCC = SHDN = 3.3V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Supply Voltage Inductor Input Voltage Range VCC Undervoltage Lockout Quiescent Supply Current Shutdown Supply Current VCC Line Regulation VIN Line Regulation Load Regulation Efficiency Feedback Set Point Feedback Input Bias Current LX LX Voltage Range LX Switch Current Limit VLX LIM = VCC ILX(MAX) LIM = floating LIM = GND LX On-Resistance LX Leakage Current Maximum LX On-Time Minimum LX Off-Time tON tOFF VFB > 1.1V VFB < 0.8V (soft-start) RLX VCC = 5V, ILX = 100mA VCC = 3.3V, ILX = 100mA VLX = 30.5V 10 0.8 3.9 13 1.0 5.0 0.40 0.20 0.10 0.50 0.25 0.125 0.8 1 2 2 16 1.2 6.0 30.5 0.56 0.285 0.15 Ω µA µs µs A V VFB IFB VFB = 1.3V ∆VLNR ∆VLNR ∆VLDR SYMBOL VCC VIN VUVLO ICC (Note 2) (Note 2) VCC falling, 50mV typical hysteresis VFB = 1.3V SHDN = GND VOUT = 18V, ILOAD = 1mA, VIN = 5V, VCC = VLIM = 2.4V to 5.5V VOUT = 18V, ILOAD = 1mA, VCC = VLIM = 5V, VIN = 2.4V to 12V VOUT = 18V, VCC = VIN = VLIM = 5V, ILOAD = 0mA to 20mA L1 = 100µH, VIN = 3.6V, ILOAD = 10mA 1.225 CONDITIONS MIN 2.4 0.8 2.0 2.2 18 0.1 0.1 0.15 0.1 88 1.25 5 1.275 100 TYP MAX 5.5 VOUT 2.37 35 1 UNITS V V V µA µA %/V %/V %/mA % V nA 2 _______________________________________________________________________________________ 30V Internal Switch LCD Bias Supply ELECTRICAL CHARACTERISTICS (continued) (VCC = SHDN = 3.3V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER CONTROL INPUTS VIH SHDN Input Threshold VIL SHDN Input Bias Current LIM Input Low Level LIM Input Float Level LIM Input High Level LIM Input Bias Current ILIM ISHDN 2.4V ≤ VCC ≤ 5.5V VCC = 5.5V, V SHDN = 0 to 5.5V 2.4V ≤ VCC ≤ 5.5V 2.4V ≤ VCC ≤ 5.5V, ILIM = ±0.5µA 2.4V ≤ VCC ≤ 5.5V SHDN = VCC, LIM = GND or VCC SHDN = GND (VCC / 2) 0.2V VCC - 0.4V -2 0.1 2 1 -1 2.4V ≤ VCC ≤ 5.5V 0.8 × VCC 0.2 × VCC 1 0.4 (VCC / 2) + 0.2V SYMBOL CONDITIONS MIN TYP MAX UNITS MAX1605 V µA V V V µA ELECTRICAL CHARACTERISTICS (VCC = SHDN = 3.3V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER Supply Voltage Inductor Input Voltage Range VCC Undervoltage Lockout Quiescent Supply Current Shutdown Supply Current Feedback Set Point Feedback Input Bias Current LX LX Voltage Range LX Switch Current Limit LX On-Resistance LX Leakage Current Maximum LX On-Time Minimum LX Off-Time CONTROL INPUTS VIH SHDN Input Threshold VIL SHDN Input Bias Current ISHDN 2.4V ≤ VCC ≤ 5.5V VCC = 5.5V, VSHDN = 0 to 5.5V -1 2.4V ≤ VCC ≤ 5.5V 0.8 × VCC 0.2 × VCC 1 tON tOFF VFB > 1.1V VFB < 0.8V VLX LIM = VCC ILX(MAX) RLX LIM = floating LIM = GND VCC = 3.3V, ILX = 100mA VLX = 30.5V 9 0.75 3.8 0.35 0.18 0.08 30.5 0.58 0.30 0.17 2 2 17 1.25 6.0 Ω µA µs µs A V VFB IFB VFB = 1.3V SYMBOL VCC VIN VUVLO ICC (Note 2) (Note 2) VCC falling, 50mV typical hysteresis VFB = 1.3V SHDN = GND 1.215 CONDITIONS MIN 2.4 0.8 2.0 MAX 5.5 VOUT 2.37 35 1 1.285 100 UNITS V V V µA µA V nA V µA _______________________________________________________________________________________ 3 30V Internal Switch LCD Bias Supply MAX1605 ELECTRICAL CHARACTERISTICS (continued) (VCC = SHDN = 3.3V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1) PARAMETER LIM Input Low Level LIM Input Float Level LIM Input High Level LIM Input Bias Current ILIM SYMBOL CONDITIONS 2.4V ≤ VCC ≤ 5.5V 2.4V ≤ VCC ≤ 5.5V, ILIM = ±0.5µA 2.4V ≤ VCC ≤ 5.5V SHDN = VCC, LIM = GND or VCC SHDN = GND (VCC / 2) - 0.25V VCC - 0.4V -2 MIN MAX 0.4 (VCC / 2) + 0.25V UNITS V V V 2 1 µA Note 1: All devices are 100% tested at TA = +25°C. All limits over the temperature range are guaranteed by design. Note 2: The MAX1605 requires a supply voltage between +2.4V and +5.5V; however, the input voltage used to power the inductor can vary from +0.8V to VOUT. Typical Operating Characteristics (VCC = 3.3V, VIN = 3.6V, L1 = 10µH, SHDN = LIM = VCC, VOUT(NOM) = 18V (Figure 3), TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE vs. LOAD CURRENT MAX1605 toc02 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE VIN = 3.6V LIM = VCC (500mA) IOUT = 5mA MAX1605 toc01 OUTPUT VOLTAGE vs. INPUT VOLTAGE 21.5 21.3 21.1 OUTPUT VOLTAGE (V) 20.9 20.7 20.5 20.3 20.1 19.9 19.7 VCC = 3.3V LIM = VCC (500mA) 0 3 6 INPUT VOLTAGE (V) 9 12 IOUT = 1mA IOUT = 5mA 18.4 18.3 18.2 OUTPUT VOLTAGE (V) 18.1 18.0 17.9 17.8 17.7 17.6 17.5 17.4 0 5 LIM = GND (125mA) 18.1 OUTPUT VOLTAGE (V) 18.0 17.9 17.8 17.7 17.6 2.0 LIM = VCC (500mA) IOUT = 1mA LIM = OPEN (250mA) 19.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) 10 15 20 25 LOAD CURRENT (mA) EFFICIENCY vs. SUPPLY VOLTAGE (L1 = 10µH) MAX1605 toc04 EFFICIENCY vs. INPUT VOLTAGE (L1 = 10µH) MAX1605 toc05 EFFICIENCY vs. LOAD CURRENT (L1 = 10µH) 78 76 EFFICIENCY (%) 74 72 70 68 66 LIM = OPEN (250mA) LIM = GND (125mA) LIM = VCC (500mA) MAX1605 toc06 80 IOUT = 5mA IOUT = 10mA 90 IOUT = 5mA 80 EFFICIENCY (%) 70 60 50 40 30 VCC = 3.3V ILIM = 500mA 0 3 6 INPUT VOLTAGE (V) 9 IOUT = 1mA 80 78 EFFICIENCY (%) 76 74 IOUT = 1mA 80 VIN = 3.6V ILIM = 500mA 72 64 62 60 12 0 5 10 15 20 25 LOAD CURRENT (mA) 70 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) 4 _______________________________________________________________________________________ MAX1605 toc03 18.2 30V Internal Switch LCD Bias Supply Typical Operating Characteristics (continued) (VCC = 3.3V, VIN = 3.6V, L1 = 10µH, SHDN = LIM = VCC, VOUT(NOM) = 18V (Figure 3), TA = +25°C, unless otherwise noted.) EFFICIENCY vs. LOAD CURRENT (L1 = 47µH) MAX1605 toc07 MAX1605 EFFICIENCY vs. LOAD CURRENT (L1 = 100µH) MAX1605 toc08 CURRENT LIMIT vs. SUPPLY VOLTAGE LIM = VCC 500 CURRENT LIMIT (mA) MAX1605 toc09 90 88 86 EFFICIENCY (%) LIM = OPEN (250mA) LIM = GND (125mA) 90 88 86 EFFICIENCY (%) 84 82 80 78 76 74 0 5 10 15 LIM = VCC (500mA) LIM = GND (125mA) LIM = OPEN (250mA) 600 84 82 80 78 76 74 0 5 400 300 LIM = OPEN LIM = VCC (500mA) 200 LIM = GND 100 10 15 20 25 20 25 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 LOAD CURRENT (mA) LOAD CURRENT (mA) SUPPLY VOLTAGE (V) CURRENT LIMIT vs. INPUT VOLTAGE MAX1605 toc10 SUPPLY CURRENT vs. SUPPLY VOLTAGE (NO-LOAD) MAX1605 toc11 SUPPLY CURRENT vs. LOAD CURRENT LIM = GND (125mA) LIM = OPEN (250mA) MAX1605 toc12 600 LIM = VCC 25 3.0 2.5 SUPPLY CURRENT (mA) 2.0 1.5 1.0 0.5 0 500 CURRENT LIMIT (mA) 20 SUPPLY CURRENT (µA) 400 LIM = OPEN 300 15 10 200 LIM = GND 5 LIM = VCC (500mA) 100 0 3 6 INPUT VOLTAGE (V) 9 12 0 0 1 2 3 4 5 SUPPLY VOLTAGE (V) 0 5 10 15 20 25 LOAD CURRENT (mA) LINE TRANSIENT MAX1605 toc13 LOAD TRANSIENT MAX1605 toc14 SHUTDOWN WAVEFORM MAX1605 toc15 4V IOUT 10mA/div 10mA A 2V/div 0 18.1V 18V B 100mV/div 2V 0 IL1 250mA/div 200µs/div VOUT = 18V, ROUT = 1.8kΩ VCC = 3.3V, VIN = 3.6V VOUT 10V/div 500mA 250mA 0 IL1 500mA/div 20V 10V 0 VSHDN 2V/div 6V 4V 2V 18.1V 18 17.9V 200µs/div A: VIN = VCC = 2.4V TO 5.5V B: VOUT = 18V, ROUT = 3.6kΩ 17.9V 500mA 0 40µs/div VOUT = 18V, IOUT = 1mA TO 10mA VCC = 3.3V, VIN = 3.6V _______________________________________________________________________________________ VOUT 100mV/div 5 30V Internal Switch LCD Bias Supply MAX1605 Pin Description PIN 1 2 3 4 5 6 NAME SHDN VCC GND LX LIM FB FUNCTION Active-Low Shutdown Input. A logic low shuts down the device and reduces the supply current to 0.1µA. Connect SHDN to VCC for normal operation. IC Supply Voltage (+2.4V to +5.5V). Bypass VCC to GND with a 0.1µF or greater capacitor. Ground Inductor Connection. The drain of an internal 30V N-channel MOSFET. LX is high impedance in shutdown. Inductor Current Limit Selection. Connect LIM to VCC for 500mA, leave LIM floating for 250mA, or connect LIM to GND for 125mA. Feedback Input. Connect to a resistive-divider network between the output (VOUT) and FB to set the output voltage between VIN and 30V. The feedback threshold is 1.25V. L1 10µH VIN = 0.8V TO VOUT LX CFF VCC = 2.4V TO 5.5V CONTROL LOGIC VCC LIM CURRENT LIMIT N VOUT = VIN TO 30V COUT SHUTDOWN LOGIC R1 FB ON OFF SHDN ERROR AMPLIFIER 1.25V GND MAX1605 R2 Figure 1. Functional Diagram Detailed Description The MAX1605 compact, step-up DC-DC converter operates from a +2.4V to +5.5V supply. Consuming only 18µA of supply current, the device includes an internal switching MOSFET with 1Ω on-resistance and selectable current limit (Figure 1). During startup, the MAX1605 extends the minimum off-time, limiting initial surge current. The MAX1605 also features a shutdown mode. 6 Control Scheme The MAX1605 features a minimum off-time, current-limited control scheme. The duty cycle is governed by a pair of one-shots that set a minimum off-time and a maximum on-time. The switching frequency can be up to 500kHz and depends upon the load and input voltage. The peak current limit of the internal N-channel MOSFET is pin selectable and may be set at 125mA, 250mA, or 500mA (Figure 2). _______________________________________________________________________________________ 30V Internal Switch LCD Bias Supply MAX1605 VCC (2.4V TO 5.5V) VCC MAX1605 LIM VCC (2.4V TO 5.5V) VCC MAX1605 NO CONNECTION LIM VCC (2.4V TO 5.5V) VCC MAX1605 LIM GND GND GND IPEAK = 500mA IPEAK = 250mA IPEAK = 125mA Figure 2. Setting the Peak Inductor Current Limit Setting the Output Voltage (FB) Adjust the output voltage by connecting a voltagedivider from the output (VOUT) to FB (Figure 3). Select R2 between 10kΩ to 200kΩ. Calculate R1 with the following equation: R1 = R2 [(VOUT / VFB) – 1] where VFB = 1.25V and VOUT may range from VIN to 30V. The input bias current of FB has a maximum value of 100nA, which allows large-value resistors to be used. For less than 1% error, the current through R2 should be greater than 100 times the feedback input bias current (IFB). Separate/Same Power for L1 and VCC Separate voltage sources can supply the inductor (VIN) and the IC (VCC). This allows operation from low-voltage batteries as well as high-voltage sources (0.8V to 30V) because chip bias is provided by a logic supply (2.4V to 5.5V), while the output power is sourced directly from the battery to L1. Conversely, VIN and VCC can also be supplied from one supply if it remains within V CC’ s operating limits (+2.4V to +5.5V). Current Limit Select Pin (LIM) The MAX1605 allows a selectable inductor current limit of 125mA, 250mA, or 500mA (Figure 2). This allows flexibility in designing for higher current applications or for smaller, compact designs. The lower current limit allows the use of a physically smaller inductor in spacesensitive, low-power applications. Connect LIM to VCC for 500mA, leave floating for 250mA, or connect to GND for 125mA. L1 10µH VIN = 0.8V TO VOUT CIN 10µF VCC = 2.4V TO 5.5V C1 0.1µF LIM ON OFF SHDN D1 VCC MAX1605 FB R2 165kΩ GND LX R1 2.2MΩ VOUT = 18V CFF 10pF COUT 1µF Shutdown (SHDN) Pull SHDN low to enter shutdown. During shutdown, the supply current drops to 0.1µA and LX enters a highimpedance state. However, the output remains connected to the input through the inductor and output rectifier, holding the output voltage to one diode drop below VIN when the MAX1605 is shut down. The capacitance and load at OUT determine the rate at which V OUT decays. S HDN can be pulled as high as 6V, regardless of the input and output voltages. Figure 3. Typical Application Circuit 7 _______________________________________________________________________________________ 30V Internal Switch LCD Bias Supply MAX1605 Design Procedure Inductor Selection Smaller inductance values typically offer smaller physical size for a given series resistance or saturation current. Circuits using larger inductance values may start up at lower input voltages and exhibit less ripple, but also provide reduced output power. This occurs when the inductance is sufficiently large to prevent the maximum current limit from being reached before the maximum on-time expires. The inductor’s saturation current rating should be greater than the peak switching current. However, it is generally acceptable to bias the inductor into saturation by as much as 20%, although this will slightly reduce efficiency. Input Bypass Capacitor Two inputs, VCC and VIN, require bypass capacitors. Bypass VCC with a 0.1µF ceramic capacitor as close to the IC as possible. The input supplies high currents to the inductor and requires local bulk bypassing close to the inductor. A 10µF low-ESR surface-mount capacitor is sufficient for most applications. PC Board Layout and Grounding Careful printed circuit layout is important for minimizing ground bounce and noise. Keep the MAX1605 ’ s ground pin and the ground leads of the input and output capacitors less than 0.2in (5mm) apart. In addition, keep all connections to FB and LX as short as possible. In particular, when using external feedback resistors, locate them as close to FB as possible. To minimize output voltage ripple, and to maximize output power and efficiency, use a ground plane and solder GND directly to the ground plane. Refer to the MAX1605EVKIT evaluation kit for a layout example. Picking the Current Limit The peak LX current limit (ILX(MAX)) required for the application may be calculated from the following equation: ILX(MAX) ≥ VOUT − VIN(MIN) × t OFF(MIN) VOUT × IOUT(MAX) + VIN(MIN) 2×L ( ) Applications Information Negative Voltage for LCD Bias The MAX1605 can also generate a negative output by adding a diode-capacitor charge-pump circuit (D1, D2, and C3) to the LX pin as shown in Figure 4. Feedback is still connected to the positive output, which is not loaded, allowing a very small capacitor value at C4. For best stability and lowest ripple, the time constant of the R1-R2 series combination and C4 should be near or less than that of C2 and the effective load resistance. Output load regulation of the negative output is somewhat looser than with the standard positive output circuit, and may rise at very light loads due to coupling through the capacitance of D2. If this is objectionable, reduce the resistance of R1 and R2, while maintaining their ratio, to effectively preload the output with a few hundred microamps. This is why the R1-R2 values shown in Figure 3 are about 10-times lower than typical values used for a positive-output design. When loaded, the negative output voltage will be slightly lower (closer to ground by approximately a diode forward voltage) than the inverse of the voltage on C4. where tOFF(MIN) = 0.8µs, and VIN(MIN) is the minimum voltage used to supply the inductor. The set current limit must be greater than this calculated value. Select the appropriate current limit by connecting LIM to VCC, GND, or leaving it unconnected (see the Current Limit Select Pin (LIM) section and Figure 2). Diode Selection The high maximum switching frequency of 500kHz requires a high-speed rectifier. Schottky diodes, such as the Motorola MBRS0530 or the Nihon EP05Q03L, are recommended. To maintain high efficiency, the average current rating of the Schottky diode should be greater than the peak switching current. Choose a reverse breakdown voltage greater than the output voltage. Output Filter Capacitor For most applications, use a small ceramic surfacemount output capacitor, 1µF or greater. For small ceramic capacitors, the output ripple voltage is dominated by the capacitance value. If tantalum or electrolytic capacitors are used, the higher ESR increases the output ripple voltage. Decreasing the ESR reduces the output ripple voltage and the peak-to-peak transient voltage. Surface-mount capacitors are generally preferred because they lack the inductance and resistance of their through-hole equivalents. Output Disconnected in Shutdown When the MAX1605 is shut down, the output remains connected to the input (Figure 3), so the output voltage falls to approximately V IN - 0 .6V (the input voltage minus a diode drop). For applications that require output isolation during shutdown, add an external PNP transistor as shown in Figure 4. When the MAX1605 is active, the voltage set at the transistor ’ s emitter exceeds the input voltage, forcing the transistor into the 8 _______________________________________________________________________________________ 30V Internal Switch LCD Bias Supply MAX1605 L1 10µH C5 1µF D3** VCC C6 0.1µF LIM ON OFF SHDN GND MAX1605 FB R2 16.5kΩ *D1, D2 = CENTRAL SEMICONDUCTOR CMPD7000 DUAL **D3 = CENTRAL SEMICONDUCTOR CMSD4448 (1N4148) LX R1 240kΩ C1 1000pF C4 0.01µF R3 1Ω C3 0.1µF VIN = 0.8V TO VOUT D1* D2* VNEG -19V C2 1µF VCC = 2.4V TO 5.5V Figure 4. Negative Voltage for LCD Bias saturation region. When shut down, the input voltage exceeds the emitter voltage so the inactive transistor provides high-impedance isolation between the input and output. Efficiency will be slightly degraded due to the PNP transistor saturation voltage and base current. Chip Information TRANSISTOR COUNT: 2329 VIN = 0.8V TO VOUT L1 10µH R3 = 180kΩ VCC = 2.4V TO 5.5V VCC MAX1605 LIM FB R2 ON OFF SHDN GND LX R1 VSET = 18.3V (VOUT + 0.3V) 2N2907A VOUT = 18V Figure 5. Output Disconnected in Shutdown _______________________________________________________________________________________ 9 30V Internal Switch LCD Bias Supply MAX1605 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.) 6LSOT.EPS PACKAGE OUTLINE, SOT-23, 6L 21-0058 F 1 1 10 ______________________________________________________________________________________ 30V Internal Switch LCD Bias Supply 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.) MAX1605 L D A A2 PIN 1 ID D2 1 N 1 b PIN 1 INDEX AREA C0.35 [(N/2)-1] x e REF. e E DETAIL A E2 A1 k C L C L L e A e L SEMICONDUCTOR PROPRIETARY INFORMATION TITLE: DALLAS PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY APPROVAL DOCUMENT CONTROL NO. REV. 1 2 21-0137 D ______________________________________________________________________________________ 11 6, 8, &10L, QFN THIN.EPS 30V Internal Switch LCD Bias Supply MAX1605 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 D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 0.20 MAX. 0.80 3.10 3.10 0.05 0.40 0.25 MIN. 0.20 REF. PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 N 6 8 10 D2 1.50–0.10 1.50–0.10 1.50–0.10 E2 2.30–0.10 2.30–0.10 2.30–0.10 e 0.95 BSC 0.65 BSC 0.50 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 b 0.40–0.05 0.30–0.05 0.25–0.05 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF SEMICONDUCTOR PROPRIETARY INFORMATION TITLE: DALLAS PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm APPROVAL DOCUMENT CONTROL NO. REV. 2 2 21-0137 D 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 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.