AIC1555 Low-Noise Synchronous PWM Step-Down DC/DC Converter FEATURES 95% Efficiency or up 700mA Guaranteed Output Current. Adjustable Output Voltage from 0.75V to VIN of a range from +2.5V to 6.5V. The AIC1555 is a low-noise pulse-width- Very Low Quiescent Current: 35µA (Typ.). Fixed- 500KHz or Adjustable Frequency Synchronous PWM Operation. Synchronizable external Switching Frequency up to 1MHz. Constant Over-current-protection mode. Accurate Reference: 0.75V (±2.5%). 100% Duty Cycle in Dropout. Low Profile 8-Pin MSOP Package. handy-terminals. modulated (PWM) DC-DC step-down converter. It powers logic circuits in PDAs and small wireless systems such as cellular phones, The device features an internal synchronous rectifier for high conversion efficiency. Excellent noise characteristics operation provide and easy fixed-frequency post-filtering. The AIC1555 is ideally suited for Li-ion battery applications. It is also suitable for +3V or +5V fixed input applications. The device can operate in either one of the following four modes. APPLICATIONS DESCRIPTION PDAs. Digital Still Cameras. Handy-Terminals. Cellular Phones. CPU I/O Supplies. Cordless Phones. Notebook Chipset Supplies. Battery-Operated Devices (4 NiMH/ NiCd or 1 Li-ion Cells). (1) Forced PWM mode operates at a fixed frequency regardless of the load. (2) Synchronizable PWM mode allows the synchronization switching by frequency using an external with a minimum harmonics. (3) PWM/PFM Mode extends battery life by switching to a PFM pulse-skipping mode under light loads. (4) Shutdown mode sets device to standby, reducing supply current to 0.1µA or under. The AIC1555 can deliver over 700mA output current. The output voltage can be adjusted from 0.75V to VIN ranging from +2.5V to +6.5V. Other features of the AIC1555 include low quiescent current, low dropout voltage, and a 0.75V reference of ±2.5% accuracy. It is available in a space-saving 8-pin MSOP package. Analog Integrations Corporation Si-Soft Research Center 3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-1555G-01 121608 1 AIC1555 TYPICAL APPLICATION CIRCUIT VIN= 2.5V to 6.5V 1 BP CIN 22µF CBP 0.1µF LX 2 BP 3 SHDN 4 FB GND 7 SYNC/ 6 MODE RT VOUT = 1.8V L1 8 VIN * 5 6.8µH D1 SS12 Optional CF R1 820K 12pF AIC1555 CO R2 560K 22µF CIN: TAIYO YUDEN LMK316F226ZL-T Ceramic capacitor CO: TAIYO YUDEN LMK316F226ZL-T Ceramic capacitor L1: TDK SLF6025-6R8M1R3 * Note: Efficiency can boost 2% to 4% if D1 is connected. D1: GS SS12 ORDERING INFORMATION AIC1555XXXXX PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGING TYPE O8:MSOP8 PIN CONFIGURATION TOP VIEW VIN 1 BP 2 SHDN 3 FB 4 8 LX 7 GND 6 SYNC/MODE 5 RT P: Lead Free G: Green Package Example: AIC1555PO8TR In MSOP Lead Free Package & Taping & Reel Packing Type 2 AIC1555 ABSOLUTE MAXIMUM RATINGS VIN, BP, SHDN, SYNC/MODE, RT to GND -0.3 to +7V BP to VIN .-0.3 to 0.3V LX to GND -0.3 ~ (VIN+0.3V) FB to GND -0.3 ~ (VBP+0.3V) Operating Temperature Range Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient -40°C ~ 85°C MSOP8 MSOP8 75°C/W 180°C/W (Assume no ambient airflow, no heatsink) Junction Temperatrue Storage Temperature Range Lead Temperature (Soldering. 10 sec) 125°C -65°C ~ 150°C 260°C Absolute Maximum Ratings are those values beyond which the life of a device may be Impaired. TEST CIRCUIT Refer to Typical Application Circuit. 3 AIC1555 ELECTRICAL CHARACTERISTICS (VIN=+3.6V, TA=+25°°C, SYNC/MODE =GND, SHDN =IN, unless otherwise specified.) (Note1) PARAMETER Input Voltage Range Output Adjustment Range Feedback Voltage SYMBOL CONDITIONS MIN 6.5 V VOUT VREF VIN V VFB 0.731 0.769 V +2.5 % Duty Cycle = 100% to 23% IOUT = 0 to 700mA IFB VFB = 1.4V, P-Channel On-Resistance PRDS(ON) ILX = 100mA N-Channel On-Resistance NRDS(ON) ILX = 100mA P-Channel Current-Limit -50 0.65 VIN = 2.5V 0.38 VIN = 3.6V 0.32 VIN = 2.5V 0.38 VIN = 5.5V, VLX = 0 or 5.5V fOSC dutyMAX UVLO VIN rising, typical hysteresis is 85mV SHDN , SYNC/MODE, LIM Logic Input Low VIL SHDN , SYNC/MODE, LIM Pulse Width SHDN , SYNC/MODE, LIM High or low Ω Ω 2.1 A 35 70 µA 0.1 1 µA -20 0.1 20 µA 400 500 600 KHz 1000 KHz 100 VIH SYNC/MODE Minimum 0.65 nA 1.5 500 Logic Input High Logic Input Current 1 leakage current SYNC Capture Range Threshold % 0.32 SHDN = LX = GND, includes LX LX Leakage Current -1.3 VIN = 3.6V VFB = 1.4V, LX unconnected Shutdown Supply Current % 50 SYNC/MODE = GND, Quiescent Current +1 0.01 (Note 2) Threshold Undervoltage Lockout 0.75 -2.5 Load Regulation Maximum Duty Cycle UNITS 2.5 Line Regulation Oscillator Frequency MAX VIN Feedback Accuracy FB Input Current TYP 1.9 % 2.0 2.1 2 -1 500 V V 0.1 0.4 V 1 µA nS Note 1: Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). Note 2: Maximum specification is guaranteed by design, not production tested. 4 AIC1555 TYPICAL PERFORMANCE CHARACTERISTICS (TA=25oC, VIN=3.6V, SYNC/MODE=GND, with Schottky diode D1, unless otherwise noted.) 100 100 80 70 VIN=5.0V 60 VIN=6.5V 80 70 VIN=6.5V VIN=5.0V 60 VIN=3.3V VIN=2.3V 50 50 40 VIN=2.1V 90 VIN=2.1V Efficiency (%) Efficiency (%) 90 VOUT=1.5V VOUT=1.2V 0.1 1 10 100 40 0.1 1000 Load Current (mA) 1 10 Load Current (mA) 100 1000 Fig. 2 Load Current vs. Efficiency (VOUT=1.5V) Fig. 1 Load Current vs. Efficiency (VOUT=1.2V) (Refer to typical application circuit) (Refer to typical application circuit) (Refer to typical application circuit) 100 100 VIN=3.3V 90 VIN=2.1V 90 Efficiency (%) Efficiency (%) VIN=3.3V 80 70 VIN=6.5V VIN=5.0V 60 80 70 VIN=6.5V VIN=5.0V 60 50 50 VOUT=2.5V VOUT=1.8V 40 40 0.1 1 10 100 0.1 1 1000 Load Current (mA) Fig. 4 Fig. 3 Load Current vs. Efficiency (VOUT=1.8V) 10 100 1000 Load Current (mA) Load Current vs. Efficiency (VOUT=2.5V) (Refer to typical application circuit) (Refer to typical application circuit) 100 100 VIN=3.6V VIN=3.6V 90 90 80 80 Efficiency (%) Efficiency (%) VIN=4.2V 70 60 50 VIN=6.5V 70 60 40 1 Fig. 5 10 100 Load Current (mA) Load Current vs. Efficiency (VOUT=3.0V) (Refer to typical application circuit) VIN=4.2V 50 VOUT=3.0V 40 0.1 VIN=5.0V 1000 0.1 1 10 VOUT=3.3V 100 1000 Load Current (mA) Fig. 6 Load Current vs. Efficiency (VOUT=3.3V) (Refer to typical application circuit) 5 AIC1555 TYPICAL PERFORMANCE CHARACTERISTICS (continued) 0.765 100 W/ Schottky Diode 90 0.760 Reference Voltage (V) SYNC= GND Efficiency (%) 80 W/o Schottky Diode 70 60 SYNC= VIN 50 40 VOUT=3.0V 30 0.1 Fig. 7 1 10 Load Current (mA) 100 540 0.755 0.750 0.745 0.740 0.735 0.725 -50 1000 -25 0 25 50 75 100 125 Temperature (°C) Fig. 8 Reference Voltage vs. Temperature Load Current vs. Efficiency (W/ or W/O Schottky Diode) 550 540 VIN=3.6V 530 530 Frequency (KHz) Frequency (KHz) VIN=3.6V 0.730 550 520 510 500 490 480 520 510 500 490 480 470 470 460 460 450 -40 -20 0 20 40 60 80 100 450 120 2.0 Temperature (°C) Fig. 9 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Supply Voltage (V) Fig. 10 Frequency vs. Input Voltage Oscillator Frequency vs. Temperature 1.82 0.44 0.42 1.80 Output Voltage (V) Main Switch 0.40 RDSON (mΩ) 0.38 0.36 0.34 0.32 VIN=3.6V 1.78 1.76 0.30 0.28 1.74 Synchronous Switch 0.26 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Supply Voltage (V) Fig. 11 RDSON vs. Supply Voltage 5.5 6.0 1.72 1 10 100 1000 Load Current (mA) Fig. 12 Output Voltage vs. Load Current 6 AIC1555 TYPICAL PERFORMANCE CHARACTERISTICS (continued) 300 100 VOUT=1.8V PWM/PFM 90 A) 250 80 Efficiency (%) DC Supply Current ( μ200 SYNC/PWM=IN 150 100 70 PWM 60 50 40 SYNC/PWM=GND 30 VIN=3.6V VOUT=1.8V 50 20 0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 10 0.1 1 10 Supply Voltage (V) Fig. 13 DC Supply Current vs. Supply Voltage 100 1000 Load current (mA) Efficiency vs. Load current Fig. 14 1000 Operation Frequency (KHz) 900 800 700 600 500 2250 2000 Fig. 15 1500 1250 1000 750 Tuning Resistor RT (kΩ) 1750 500 250 Operation Frequency vs. Tuning Resistor Fig. 16 VOUT=1.8V; ILOAD=50mA to 500mA; SYNC/MODE=IN Fig. 17 Load Transient Response Over Current Protection VOUT=1.8V; ILOAD=50mA to 500mA; SYNC/MODE=GND Fig. 18 Load Transient Response 7 AIC1555 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.3V to 5V, IOUT=1.8V; ILOAD=200mA to 500mA; SYNC/MODE=IN Fig. 19 Line Transient Response Fig. 20 Start-up from Shutdown, RLOAD=3Ω VIN=3.6V, VOUT=1.8V, ILOAD=800mA VOUT VIN=3.6V; VOUT=1.8V; ILOAD=500mA VLX SYNC/MODE=IN Fig. 21 Switching Waveform Fig. 22 Output Ripple voltage 8 AIC1555 BLOCK DIAGRAM BP Chip S upply 10 0.75V RE F C urrent A M P . S HDN V IN V IN + X 5 5 S lope 500K H z O scillator RT Q1 x1 Current Lim it Com parator Com pen sation Q2 X20 Frequenc y S YNC + S election P hase Com pensation FB FB REF E rro r A MP . PW M Com parator + LX A ntiS hootThrough Control Lo gic Therm al P rotection + RE F - Q3 PW M/P FM Control Zero C ross Com parator REF + + G ND PFM C om pa rator PIN DESCRIPTIONS PIN 1: VIN- PIN 2: BP- Supply Voltage Input ranging from +2.5V to +6.5V. Bypass with a 22µF capacitor. Supply Bypass Pin internally connecting to VIN. Bypass with a 0.1µF capacitor. PIN 3: SHDN - Active-Low, Shutdown-Control Input reducing supply current to 0.1µA in shutdown mode. PIN 4: FBFeedback Input. PIN 5: RTFrequency Adjustable Pin connecting to GND through a resistor to increase frequency. (Refer to Fig. 15) PIN 6: SYNC/MODEOscillator Sync and Low-Noise, Mode-Control Input. SYNC/MODE = VIN (Forced PWM Mode) SYNC/MODE = GND (PWM/PFM Mode) An external clock signal connecting to this pin allows LX switching synchronization. PIN 7: GNDGround. PIN 8: LX- Inductor connecting to the Drains of the Internal Power MOSFETs 9 AIC1555 APPLICATION INFORMATIONS block. Similarly, when Q3 is on, Q2 will turn off. Introduction AIC1555 is a low-noise, pulse-width-modulated (PWM), DC-DC step-down converter. It features an internal synchronous rectifier, which eliminates external Schottky diode. AIC1555 is suitable for Lilon battery applications, or can be used at 3V or 5V fixed input voltage. It operates in one of following four modes. AIC1555 provides current limit function by using a 5Ω resistor. When Q1 turns on, current follows through the 5Ω resistor. And current amplifier senses the voltage, which crosses the resistor, and amplifies it. When the sensed voltage gets bigger than reference voltage, output current will be clamped a maximum level. AIC1555 provides the thermal protection. When (1) Forced PWM mode operates at a fixed the action is happened then the control logic shuts frequency regardless of the load. the device off. (2) Synchronizable PWM mode allows the synchronization switching by frequency using an external with a minimum PWM/PFM Function When connecting SYNC/MODE pin to VIN, the harmonics. is forced into PWM (3) PWM/PFM Mode extends battery life by device Modulated) mode with constant switching to a PFM pulse-skipping mode Advantage under light loads. reducing noise without complex post-filter. But its of constant (Pulse-Width- frequency frequency. is easily (4) Shutdown mode sets device to standby, disadvantage is low efficiency at light loading. reducing supply current to 0.1µA or under. Therefore, AIC1555 provides a function to solve Continuous output current of AIC1555 can be upward to 700mA and output voltage can be adjusted from 0.75V to VIN with an input range from 2.5V to 6.5V by a voltage divider. AIC1555 also features high efficiency, low dropout voltage, and a 0.75V reference with ±2.5% accuracy. It is available in a space-saving 8-pin MSOP package. to GND, device is able to get into PWM/PFM (Pulse-Frequency-Modulated) modes. Under a light loading condition, the device turns to PFM mode, which results in a higher efficiency. PWM mode is on when heavy loading applies and the noise is reduced. Frequency Synchronization Operation When power on, control logic block detects SYNC/MODE pin connecting to VIN or GND to determine operation function and gives a signal to PWM/PFM control block to determine the proper comparator (ref. Block Diagram). AIC1555 works with an internal synchronous rectifier this problem. When connecting SYNC/MODE pin － Q3, to Connecting an external clock signal to SNYC/MODE pin can control switching frequency. The acceptable range is from 500kHz to 1MHz. This mode exhibits low output ripple as well as low audio noise and reduces RF interference while providing reasonable low current efficiency. increase efficiency. When control logic block turns Q2 on, Q3 will turn off through anti-short-through 10 AIC1555 voltage, the converter continuously turns Q2 on. In V V OUT = OUT (2) 2 × Ma 2 × 0.27 Note that output voltage can be defined according this mode, the output voltage is equal to the input to user’s requirement to get a suitable inductor voltage minus the voltage, which is the drop value. 100% Duty Cycle Operation When the input voltage approaches the output L1 > across Q2. If input voltage is very close to output voltage, the Output Capacitor switching mode goes from pure PWM mode to The selection of output capacitor depends on the 100% duty cycle operation. During this transient suitable ripple voltage. Lower ripple voltage state mentioned above, large output ripple voltage corresponds to lower ESR (Equivalent Series will appear on output terminal. Resistor) of output capacitor. Typically, once the ESR is satisfied with the ripple voltage, the value of capacitor is adequate for filtering. The formula Components Selection Inductor The inductor selection depends on the operating frequency of AIC1555. The internal switching of ripple voltage is as below: 1 ∆VOUT = ∆IL ESR + 8 fC OUT (3) external Besides, in buck converter architecture frequency synchronized frequency ranges from 500KHz to stands at 1/ (LC) when a double pole formed by 1MHz. A higher frequency allows the uses of the inductor and output capcitor occurs. This will smaller inductor and capacitor values. But, higher reduce phase margin of circuit so that the stability frequency results lower efficiency due to the gets internal switching loss. capacitor that is parallel with R1 can be added to The ripple current ∆IL interrelates with the inductor reduce output ripple voltage and increase circuit value. A lower inductor value gets a higher ripple stability. The output capacitor can be calculated as current. Besides, a higher VIN or VOUT can also the following formula. frequency is 500KHz, and the get the same result. The inductor value can be calculated as the following formula. V 1 1 − OUT L= V (f )(∆IL ) OUT VIN √ weakened. 1 L1 × C ≅ O Therefore, 1 R1 × CF a feedforward (4) (1) For more reduction in the ripple voltage, a 12pF Users can define the acceptable ∆IL to gain a ceramic capacitor, which is parallel with output suitable inductor value. capacitor, is used. Since AIC1555 can be used in ceramic capacitor External Schottky Diode application, the component selection will be AIC1555 has an internal synchronous rectifier, different from the one for the application above. instead of Schottky diode in buck converter. AIC1555 has a built-in slope compensation, which However, a blank time, which is an interval when acitvates when duty cycle is larger than 0.45. The μs, has to be larger than half of both of main switch, Q2, and synchronous rectifier, slope Ma, 0.27V/ Q3, are off; occurs at each switching cycle. At the M2. M2 is equal to output voltage divided by L1. moment, AIC1555 has a decreasing efficiency. The formula of inductor is shown as below: Therefore, an external Schottky diode is needed to reinforce the efficiency. 11 AIC1555 Since the diode conducts during the off time, the close as possible to each other to reduce the peak current and voltage of converter is not input ripple voltage. allowed to exceed the diode ratings. The ratings of diode can be calculated by the following formulas: VD,MAX( OFF ) = VIN ID,MAX(ON) = IOUT,MAX + 2. The output loop, which is consisted of inductor, Schottky diode and output capacitor, (5) ∆IL 2 (6) should be kept as small as possible. 3. The routes with large current should be kept short and wide. 4. Logically the large current on the converter, ID,AVG( ON) = IOUT − IIN = IOUT − D × IOUT = (1 − D) × IOUT when AIC1555 is on or off, should flow at the (7) same direction. 5. The FB pin should connect to feedback Adjustable Output Voltage AIC1555 appears a 0.75V reference voltage at FB resistors directly. And the route should be pin. Output voltage, ranging from 0.75V to VIN, away from the noise source, such as inductor of LX line. can be set by connecting two external resistors, R1 and R2. VOUT can be calculated as: R1 VOUT = 0.75 V × (1 + ) R2 6. Grounding all components at the same point may effectively reduce the occurrence of loop. (8) A stability ground plane is very important for Applying a 12pF capacitor parallel with R1 can gaining higher efficiency. When a ground prevent stray pickup. They should sit as close to plane is cut apart, it may cause disturbed AIC1555 as possible. But load transient response signal and noise. If possible, two or three is degraded by this capacitor. through-holes can ensure the stability of grounding. Over Current Protection Example The current limiter circuit monitors the current Here are two examples to prove the components flowing through the P-channel MOS connected to selector guide above. the Lx pin, and features a constant-current type current limit mode. If the inductor current does not 1. Tantalum capacitors application: exceed the current limit, the high-side MOSFET Assume AIC1555 is used for mobile phone turns on normally. When the driver current is application, which uses 1-cell Li-ion battery with greater than a specific level, the constant-current 2.7V to 4.2V input voltage for power source. The type current limit function operates to turn off the required load current is 700mA, and the output pulses from the Lx pin at any switching cycle. This voltage is 1.8V. Substituting VOUT=1.8V, VIN=4.2V, features a constant-current type over current ∆I=250mA, and f=500KHz to equation (1) protection L= Layout Consideration To ensure a proper operation of AIC1555, the following points should be given attention to: 1. Input capacitor and Vin should be placed as 1.8 V 1.8 V 1 − = 8.23µH 500KHz × 250mA 4.2V Therefore, 10µH is proper for the inductor. And the inductor of series number SLF6025-100M1R0 from TDK with 57.3mΩ series resistor is recommended for the best efficiency. 12 AIC1555 For output capacitor, the ESR is more important Of the same AIC1555 application above, except than for ceramic capacitor used, Co, R1, and R2 can its capacity. Assuming ripple voltage ∆V=100mV, then the ESR can be calculated as: ∆V 100mV ESR= = = 0.4Ω ∆I 250mA be calculated as following formulas. And the same Therefore, a 33µF/10V capacitor, MCM series VOUT is substituted by 1.8V in equation (2) as values of load current and output voltage at 700mA and 1.8V respectively are used. from NIPPON, is recommend. Schottky selection is calculated as following. VD,MAX( OFF ) = VIN = 4.2V ∆IL 2 250mA = 800mA + 2 ID,MAX(ON) = IOUT,MAX + = 925mA L1 > V OUT = 1.8 = 3.33 µH 0.54 0.54 Let L1 = 6.8µH, and choose CF = 12pF, R1 = 820kΩ. Co calculated by the following formula can improve circuit stability. 1 ID,avg(ON) = (1 − D ) × IOUT 1 .8 = (1 − ) × 800mA 4 .2 = 457.14mA According the datas above, the Schottky diode, SS12, from GS is recommend. For feedback resistors, choose R2=390kΩ and R1 can be calculated as follow: ≅ L1 × C O 1 R1 × CF Therefore, C O = (R1 × CF )2 = (820k × 12pF)2 L1 = 12 µF Say, CO is 22µF. Then, R2 can be decided by equation (8) as R1 VOUT 1.8 −1= − 1 = 1.4 V 0.75 ref 1.8V R1 = − 1 × 390kΩ = 546kΩ ; use 560kΩ 0.75 R2 Fig. 22 and Fig.23 shows the application circuit of So, R2 = 560kΩ. AIC1555. 6.8µ. = Note: Schottky diode, SS12 from GS, is still required in this application. 2. Ceramic capacitors application: 13 AIC1555 VIN= 2.5V to 6.5V 1 BP + CIN 10µF CBP 0.1µF 2 BP 3 SHDN 4 FB 10µH D1 SS12 GND 7 ** SYNC/ 6 MODE 5 RT VOUT = 1.8V L1 8 LX VIN Optional CF R1 560K 10P + AIC1555 *CO1 *CO2 4.7µF 33µF R2 390K * Note: CO1 can be omitted if CO2 is 10µF Ceramic CIN: NIPPON 10µF/10V Tantalum capacitor ** Note: Efficiency can boost 2% to 4% if D1 is connected. CO1: NIPPON 33µF/6V Tantalum capacitor L: TDK SLF6025-100M1R0 D1: GS SS12 Fig. 23 AIC1555 Application Circuit (Tantalum capacitor application) VIN= 2.5V to 6.5V 1 BP CIN 22µF CBP 0.1µF LX 2 BP 3 SHDN 4 FB GND 7 SYNC/ 6 MODE RT 5 VOUT = 1.8V L1 8 VIN * 6.8µH D1 SS12 Optional CF R1 820K 12pF AIC1555 CO R2 560K 22µF CIN: TAIYO YUDEN LMK316F226ZL-T Ceramic capacitor CO: TAIYO YUDEN LMK316F226ZL-T Ceramic capacitor L1: TDK SLF6025-6R8M1R3 D1: GS SS12 * Note: Efficiency can boost 2% to 4% if D1 is connected. Fig. 24 AIC1555 Application Circuit (Ceramic capacitor application) 14 AIC1555 PHYSICAL DIMENSIONS MSOP 8 (unit: mm) D 1E A A e S Y M B O L E SEE VIEW B 2A 1A MIN. WITH PLATING 52 .0 MAX. 1.10 A1 0.05 0.15 A2 0.75 0.95 b 0.25 0.40 c 0.13 0.23 D 2.90 3.10 E E1 b L MILLIMETERS A A VIEW B MSOP-8 BASE METAL SECTION A-A GAUGE PLANE SEATING PLANE c 4.90 BSC 2.90 e 3.10 0.65 BSC L 0.40 0.70 q 0° 6° θ Note: 1. Refer to JEDEC MO-187AA. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 6 mil per side . 3. Dimension "E1" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 15