ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 ® Data Sheet June 28, 2005 Improved Industry Standard Single-Ended Current Mode PWM Controller The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 family of adjustable frequency, low power, pulse width modulating (PWM) current mode controllers is designed for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Peak current mode control effectively handles power transients and provides inherent overcurrent protection. This advanced BiCMOS design is pin compatible with the industry standard 384x family of controllers and offers significantly improved performance. Features include low operating current, 60µA start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times. FN9124.6 Features • 1A MOSFET gate driver • 60µA startup current, 100µA maximum • 25ns propagation delay current sense to output • Fast transient response with peak current mode control • Adjustable switching frequency to 2MHz • 20ns rise and fall times with 1nF output load • Trimmed timing capacitor discharge current for accurate deadtime/maximum duty cycle control • High bandwidth error amplifier • Tight tolerance voltage reference over line, load, and temperature • Tight tolerance current limit threshold • Pb-Free Plus Anneal Available (RoHS Compliant) PART NUMBER RISING UVLO MAX. DUTY CYCLE ISL6840 7.0 100% Applications ISL6841 7.0 50% • Telecom and Datacom Power ISL6842 14.4V 100% • Wireless Base Station Power ISL6843 8.4V 100% ISL6844 14.4V 50% ISL6845 8.4V 50% • File Server Power • Industrial Power Systems • PC Power Supplies • Isolated Buck and Flyback Regulators • Boost Regulators Pinout ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 8-PIN SOIC, MSOP TOP VIEW 8 VREF COMP 1 FB 2 7 VDD CS 3 6 OUT RTCT 4 5 GND DFN 8 LEAD TOP VIEW 1 COMP 1 8 VREF FB 2 7 VDD CS 3 6 OUT RTCT 4 5 GND CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Ordering Information Ordering Information PART NUMBER TEMP. RANGE (°C) PACKAGE PKG. DWG. # PART NUMBER TEMP. RANGE (°C) PACKAGE PKG. DWG. # ISL6840IRZ-T* (See Note) -40 to 105 8 Ld 2x3 DFN (Pb-free) L8.2x3 ISL6841IRZ-T* (See Note) -40 to 105 8 Ld 2x3 DFN (Pb-free) L8.2x3 M8.118 ISL6842IRZ-T (See Note) -40 to 105 8 Ld 2x3 DFN (Pb-free) L8.2x3 8 Ld SOIC M8.15 ISL6843IRZ-T (See Note) -40 to 105 8 Ld 2x3 DFN (Pb-free) L8.2x3 -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6844IRZ-T* (See Note) -40 to 105 8 Ld 2x3 DFN (Pb-free) L8.2x3 ISL6841IU -40 to 105 8 Ld MSOP M8.118 8 Ld MSOP (Pb-free) M8.118 8 Ld 2x3 DFN (Pb-free) L8.2x3 -40 to 105 ISL6845IRZ-T (See Note) -40 to 105 ISL6841IUZ (See Note) ISL6842IB -40 to 105 8 Ld SOIC M8.15 ISL6842IBZ (See Note) -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6842IU -40 to 105 8 Ld MSOP M8.118 ISL6842IUZ (See Note) -40 to 105 8 Ld MSOP (Pb-free) M8.118 ISL6843IB -40 to 105 8 Ld SOIC M8.15 ISL6843IBZ (See Note) -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6843IU -40 to 105 8 Ld MSOP M8.118 ISL6843IUZ (See Note) -40 to 105 8 Ld MSOP (Pb-free) M8.118 ISL6844IB -40 to 105 8 Ld SOIC M8.15 ISL6844IBZ (See Note) -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6844IU -40 to 105 8 Ld MSOP M8.118 ISL6844IUZ (See Note) -40 to 105 8 Ld MSOP (Pb-free) M8.118 ISL6845IB -40 to 105 8 Ld SOIC M8.15 ISL6845IBZ (See Note) -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6845IU -40 to 105 8 Ld MSOP M8.118 ISL6845IUZ (See Note) -40 to 105 8 Ld MSOP (Pb-free) M8.118 ISL6840IB -40 to 105 8 Ld SOIC M8.15 ISL6840IBZ (See Note) -40 to 105 8 Ld SOIC (Pb-free) M8.15 ISL6840IU -40 to 105 8 Ld MSOP M8.118 ISL6840IUZ (See Note) -40 to 105 8 Ld MSOP (Pb-free) ISL6841IB -40 to 105 ISL6841IBZ (See Note) 2 Add -T to part number for Tape and Reel packaging. *Contact Factory for Availability NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN9124.6 June 28, 2005 Functional Block Diagram VREF 5.00 V VDD VREF UVLO COMPARATOR ENABLE VDD OK + - - 3 VREF UV COMPARATOR 4.65V ↓ 4.80V ↑ GND A 2.5 V + - + BG A=0.5 PWM COMPARATOR + - CS 100mV ERROR AMPLIFIER 2R + - FB + - 1.1V CLAMP ISL6841/4/5 ONLY Q R T Q COMP OUT VREF 2.6V 0.7V S Q R Q RESET DOMINANT ON OSCILLATOR COMPARATOR RTCT + 8.4mA FN9124.6 June 28, 2005 ON CLOCK P/N -40, -41 -42, -44 -43, -45 UVLO ON/OFF 7.0 / 6.6V 14.3 / 8.8V 8.4 / 7.2V ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 VREF FAULT BG +- Typical Application - 48V Input Dual Output Flyback CR5 +3.3V C21 T1 + C15 + C16 R21 VIN+ +1.8V C4 R3 CR4 C17 CR2 C5 + C20 C19 RETURN CR6 R1 36-75V C1 R17 R16 C6 C3 R18 R19 U2 Q1 C14 R4 R22 C13 R15 U3 VIN- R27 R20 U4 R26 COMP VREF CS V DD FB OUT RTCT GND ISL684x R6 R10 CR1 Q3 C12 VR1 C8 R13 C11 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 4 C2 C22 + FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Absolute Maximum Ratings Thermal Information Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . GND - 0.3V to +20.0V OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VDD + 0.3V Signal Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 6.0V Peak GATE Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A ESD Classification Human Body Model (Per MIL-STD-883 Method 3015.7) . . .2000V Charged Device Model (Per EOS/ESD DS5.3, 4/14/93) . . .1000V Thermal Resistance (Typical, Note 1) Operating Conditions θJA (°C/W) θJC (°C/W) DFN Package (Note 2). . . . . . . . . . . . . 77 6 SOIC Package . . . . . . . . . . . . . . . . . . . 100 N/A MSOP Package . . . . . . . . . . . . . . . . . . 130 N/A Maximum Junction Temperature . . . . . . . . . . . . . . . . -55°C to 150°C Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C (SOIC- Lead Tips Only) Temperature Range ISL684xIx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 105°C Supply Voltage Range (Typical) ISL6840/1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V -14V ISL6843/5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V -16V ISL6842/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V -18V CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTES: 1. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 2. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. 3. All voltages are with respect to GND. Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application schematic. VDD = 15V (Note 7), Rt = 10kΩ, Ct = 3.3nF, TA = -40 to 105°C (Note 4), Typical values are at TA = 25°C PARAMETER TEST CONDITIONS MIN TYP MAX UNITS START Threshold (ISL6840, ISL6841) 6.5 7.0 7.5 V START Threshold (ISL6843, ISL6845) 7.8 8.4 9.0 V START Threshold (ISL6842, ISL6844) 13.3 14.3 15.3 V STOP Threshold (ISL6840, ISL6841) 6.1 6.6 6.9 V STOP Threshold (ISL6843, ISL6845) 6.7 7.2 7.7 V STOP Threshold (ISL6842, ISL6844) 8.0 8.8 9.6 V Hysteresis (ISL6840, ISL6841) - 0.4 - V Hysteresis (ISL6843, ISL6845) - 0.8 - V Hysteresis (ISL6842, ISL6844) - 5.4 - V UNDERVOLTAGE LOCKOUT Startup Current, IDD VDD < START Threshold - 60 100 µA Operating Current, IDD (Note 5) - 3.3 4.0 mA Operating Supply Current, ID Includes 1nF GATE loading - 4.1 5.5 mA 4.925 5.000 5.050 V REFERENCE VOLTAGE Overall Accuracy Over line (VDD = 12V to 18V), load, temperature Long Term Stability TA = 125°C, 1000 hours (Note 6) - 5 - mV Fault Voltage 4.40 4.65 4.85 V VREF Good Voltage 4.60 4.80 VREF-0.05 V Hysteresis 50 165 250 mV Current Limit, Sourcing -20 - - mA 5 - - mA Current Limit, Sinking 5 FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application schematic. VDD = 15V (Note 7), Rt = 10kΩ, Ct = 3.3nF, TA = -40 to 105°C (Note 4), Typical values are at TA = 25°C (Continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS -1.0 - 1.0 µA CURRENT SENSE Input Bias Current VCS = 1V CS Offset Voltage VCS = 0V (Note 6) 95 100 105 mV COMP to PWM Comparator Offset Voltage VCS = 0V (Note 6) 0.80 1.15 1.30 V 0.91 0.97 1.03 V 2.5 3.0 3.5 V/V - 25 40 ns Input Signal, Maximum Gain, ACS = ∆VCOMP/∆VCS 0 < VCS < 910mV, VFB = 0V (Note 6) CS to OUT Delay (Note 6) ERROR AMPLIFIER Open Loop Voltage Gain (Note 6) 60 90 - dB Unity Gain Bandwidth (Note 6) 3.5 5 - MHz Reference Voltage VFB = VCOMP 2.475 2.514 2.55 V FB Input Bias Current VFB = 0V -1.0 -0.2 1.0 µA COMP Sink Current VCOMP = 1.5V, VFB = 2.7V 1.0 - - mA COMP Source Current VCOMP = 1.5V, VFB = 2.3V -0.4 - - mA COMP VOH VFB = 2.3V 4.80 - VREF V COMP VOL VFB = 2.7V 0.4 - 1.0 V PSRR Frequency = 120Hz, VDD = 12V to 18V (Note 6) 60 80 - dB Frequency Accuracy Initial, TJ = 25°C 49 52 55 kHz Frequency Variation with VDD T = 25°C (F18V - F12V)/F12V - 0.2 1.0 % Temperature Stability (Note 6) - - 5 % OSCILLATOR Amplitude, Peak to Peak - 1.9 - V RTCT Discharge Voltage - 0.7 - V 7.2 8.4 9.5 mA Discharge Current RTCT = 2.0V OUTPUT Gate VOH VDD - OUT, IOUT = -200mA - 1.0 2.0 V Gate VOL OUT - GND, IOUT = 200mA - 1.0 2.0 V Peak Output Current COUT = 1nF (Note 6) - 1.0 - A Rise Time COUT = 1nF (Note 6) - 20 40 ns Fall Time COUT = 1nF (Note 6) - 20 40 ns ISL6840, ISL6842, ISL6843 94 96 - % ISL6841, ISL6844, ISL6845 47 48 - % ISL6840, ISL6842, ISL6843 - - 0 % ISL6841, ISL6844, ISL6845 - - 0 % PWM Maximum Duty Cycle Minimum Duty Cycle NOTES: 4. Specifications at -40°C are guaranteed by design, not production tested. 5. This is the VDD current consumed when the device is active but not switching. Does not include gate drive current. 6. Guaranteed by design, not 100% tested in production. 7. Adjust VDD above the start threshold and then lower to 15V. 6 FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Typical Performance Curves 1.001 1 1.01 NORMALIZED VREF NORMALIZED FREQUENCY 1.02 1 0.99 0.98 0.97 -40 0.999 0.998 0.997 0.996 -10 20 50 80 0.995 -40 -25 110 -10 5 TEMPERATURE (°C) 20 35 50 65 80 95 110 TEMPERATURE (°C) FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE FIGURE 1. FREQUENCY vs TEMPERATURE 1-103 FREQUENCY (kHz) NORMALIZED EA REFERENCE 1.002 1 0.998 CT= 100pF 100 220pF 330pF 470pF 1.0nF 10 2.2nF 3.3nF 4.7nF 0.996 0.994 -40 -25 -10 1 5 20 35 50 65 80 95 110 TEMPERATURE (°C) 10 20 30 40 50 60 70 80 90 100 RT (kΩ) FIGURE 3. EA REFERENCE vs TEMPERATURE Pin Descriptions RTCT - This is the oscillator timing control pin. The operational frequency and maximum duty cycle are set by connecting a resistor, RT, between VREF and this pin and a timing capacitor, CT, from this pin to GND. The oscillator produces a sawtooth waveform with a programmable frequency range up to 2.0MHz. The charge time, TC, the discharge time, TD, the switching frequency, f, and the maximum duty cycle, Dmax, can be calculated from the following equations: FIGURE 4. RTCT vs FREQUENCY COMP - COMP is the output of the error amplifier and the input of the PWM comparator. The control loop frequency compensation network is connected between the COMP and FB pins. FB - The output voltage feedback is connected to the inverting input of the error amplifier through this pin. The non-inverting input of the error amplifier is internally tied to a reference voltage. T C ≈ 0.583 • RT • CT (EQ. 1) CS - This is the current sense input to the PWM comparator. The range of the input signal is nominally 0 to 1.0V and has an internal offset of 100mV. 0.0083 • RT – 4.3 T ≈ – RT • CT • ln ---------------------------------------------- 0.0083 • RT – 2.4 D (EQ. 2) GND - GND is the power and small signal reference ground for all functions. f = 1 ⁄ (TC + TD) (EQ. 3) D = TC • f (EQ. 4) Figure 4 may be used as a guideline in selecting the capacitor and resistor values required for a given frequency. 7 OUT - This is the drive output to the power switching device. It is a high current output capable of driving the gate of a power MOSFET with peak currents of 1.0A. This GATE output is actively held low when VDD is below the UVLO threshold. FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 I OUT = Qg × f (EQ. 5) To optimize noise immunity, bypass VDD to GND with a ceramic capacitor as close to the VDD and GND pins as possible. VREF - The 5.00V reference voltage output. +1.0/-1.5% tolerance over line, load and operating temperature. Bypass to GND with a 0.1µF to 3.3µF capacitor to filter this output as needed. Functional Description Features The ISL684x current mode PWMs make an ideal choice for low-cost flyback and forward topology applications. With its greatly improved performance over industry standard parts, it is the obvious choice for new designs or existing designs which require updating. the resonant tank of the parasitic inductances in the traces of the board and the FET’s input capacitance. Slope Compensation For applications where the maximum duty cycle is less than 50%, slope compensation may be used to improve noise immunity, particularly at lighter loads. The amount of slope compensation required for noise immunity is determined empirically, but is generally about 10% of the full scale current feedback signal. For applications where the duty cycle is greater than 50%, slope compensation is required to prevent instability. The minimum amount of slope compensation required corresponds to 1/2 the inductor downslope. Adding excessive slope compensation, however, results in a control loop that behaves more as a voltage mode controller than as current mode controller. CS SIGNAL (V) VDD - VDD is the power connection for the device. The total supply current will depend on the load applied to OUT. Total IDD current is the sum of the operating current and the average output current. Knowing the operating frequency, f, and the MOSFET gate charge, Qg, the average output current can be calculated from: DOWNSLOPE CURRENT SENSE SIGNAL TIME FIGURE 6. CURRENT SENSE DOWNSLOPE Oscillator The ISL684x controllers have a sawtooth oscillator with a programmable frequency range to 2MHz, which can be programmed with a resistor from VREF and a capacitor to GND on the RTCT pin. (Please refer to Fig. 4 for the resistor and capacitance required for a given frequency.) Slope compensation may added to the CS signal in the following manner. RTCT Soft-start must be implemented externally. One method, illustrated below, clamps the voltage on COMP. VREF ISL684x Soft-Start Operation CS VREF ISL684x COMP FIGURE 7. SLOPE COMPENSATION GND Fault Conditions FIGURE 5. SOFT-START Gate Drive The ISL684x are capable of sourcing and sinking 1A peak current. To limit the peak current through the IC, an optional external resistor may be placed between the totem-pole output of the IC (OUT pin) and the gate of the MOSFET. This small series resistor also damps any oscillations caused by 8 A Fault condition occurs if VREF falls below 4.65V. When a Fault is detected OUT is disabled. When VREF exceeds 4.80V, the Fault condition clears, and OUT is enabled. Ground Plane Requirements Careful layout is essential for satisfactory operation of the device. A good ground plane must be employed. A unique section of the ground plane must be designated for high di/dt currents associated with the output stage. VDD should be bypassed directly to GND with good high frequency capacitors. FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Small Outline Plastic Packages (SOIC) M8.15 (JEDEC MS-012-AA ISSUE C) N INDEX AREA H 0.25(0.010) M 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE B M E INCHES -B- 1 2 SYMBOL 3 L SEATING PLANE -A- h x 45o A D -C- e α A1 B 0.25(0.010) M C C A M B S 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. MILLIMETERS MIN MAX NOTES A 0.0532 0.0688 1.35 1.75 - 0.0040 0.0098 0.10 0.25 - B 0.013 0.020 0.33 0.51 9 C 0.0075 0.0098 0.19 0.25 - D 0.1890 0.1968 4.80 5.00 3 E 0.1497 0.1574 3.80 4.00 4 0.050 BSC 1.27 BSC - H 0.2284 0.2440 5.80 6.20 - h 0.0099 0.0196 0.25 0.50 5 L 0.016 0.050 0.40 1.27 6 8o 0o N NOTES: MAX A1 e 0.10(0.004) MIN α 8 0o 8 7 8o Rev. 0 12/93 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension “E” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 9 FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Mini Small Outline Plastic Packages (MSOP) N M8.118 (JEDEC MO-187AA) 8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE E1 INCHES E -B- INDEX AREA 1 2 0.20 (0.008) A B C TOP VIEW 4X θ 0.25 (0.010) R1 R GAUGE PLANE SEATING PLANE -CA 4X θ A2 A1 b -H- 0.10 (0.004) L1 SEATING PLANE C D 0.20 (0.008) C a CL E1 0.20 (0.008) C D MAX MIN MAX NOTES 0.037 0.043 0.94 1.10 - A1 0.002 0.006 0.05 0.15 - A2 0.030 0.037 0.75 0.95 - b 0.010 0.014 0.25 0.36 9 c 0.004 0.008 0.09 0.20 - D 0.116 0.120 2.95 3.05 3 E1 0.116 0.120 2.95 3.05 4 0.026 BSC -B- 0.65 BSC - E 0.187 0.199 4.75 5.05 - L 0.016 0.028 0.40 0.70 6 0.037 REF N C SIDE VIEW MIN A L1 -A- e SYMBOL e L MILLIMETERS 0.95 REF 8 R 0.003 R1 0 α - 8 7 - - 0.07 - - 5o 15o - 0o 6o - 0.07 0.003 - 5o 15o 0o 6o Rev. 2 01/03 END VIEW NOTES: 1. These package dimensions are within allowable dimensions of JEDEC MO-187BA. 2. Dimensioning and tolerancing per ANSI Y14.5M-1994. 3. Dimension “D” does not include mold flash, protrusions or gate burrs and are measured at Datum Plane. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension “E1” does not include interlead flash or protrusions and are measured at Datum Plane. - H - Interlead flash and protrusions shall not exceed 0.15mm (0.006 inch) per side. 5. Formed leads shall be planar with respect to one another within 0.10mm (0.004) at seating Plane. 6. “L” is the length of terminal for soldering to a substrate. 7. “N” is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. Dimension “b” does not include dambar protrusion. Allowable dambar protrusion shall be 0.08mm (0.003 inch) total in excess of “b” dimension at maximum material condition. Minimum space between protrusion and adjacent lead is 0.07mm (0.0027 inch). 10. Datums -A -H- . and - B - to be determined at Datum plane 11. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only. 10 FN9124.6 June 28, 2005 ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Dual Flat No-Lead Plastic Package (DFN) L8.2x3 2X 8 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE 0.15 C A A D 2X 0.15 C B E MILLIMETERS SYMBOL MIN A 0.80 A1 - 6 A3 INDEX AREA b TOP VIEW D2 // 0.10 A SIDE VIEW C SEATING PLANE D2 (DATUM B) C 0.08 C 0.20 A3 7 8 0.90 1.00 - - 0.05 - 0.25 0.32 1 5,8 1.50 1.65 1.75 7,8 3.00 BSC 1.65 e 1.80 1.90 7,8 0.50 BSC - k 0.20 - - - L 0.30 0.40 0.50 8 N 8 Nd 4 D2/2 6 INDEX AREA NOTES 2.00 BSC E E2 MAX 0.20 REF D B NOMINAL 2 3 Rev. 0 6/04 2 NX k NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd refers to the number of terminals on D. (DATUM A) E2 4. All dimensions are in millimeters. Angles are in degrees. E2/2 5. Dimension b applies to the metallized terminal and is measured between 0.25mm and 0.30mm from the terminal tip. NX L N N-1 NX b e 8 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 5 0.10 (Nd-1)Xe REF. M C A B 7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. BOTTOM VIEW CL (A1) NX (b) L 5 SECTION "C-C" C C e TERMINAL TIP FOR EVEN TERMINAL/SIDE All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 11 FN9124.6 June 28, 2005