AME AME5249A n General Description The AME5249A is a fixed-frequency current mode synchronous PWM step down converter that is capable of delivering 600mA output current while achieving peak efficiency of 95%. Under light load conditions, the AME5249A operates in a power saving mode that consumes just around 20µA of supply current, maximizing battery life in portable applications. The AME5249A operates with a fixed frequency of 1.5MHz, minimizing noise in noisesensitive applications and allowing the use of small external components. The AME5249A is an ideal solution for applications powered by Li-Ion batteries or other portable applications that require small board space. The AME5249A is available in a variety of fixed output voltage options, 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 2.7V, 2.8V, and 3.3V, and is also available in an adjustable output voltage version capable of generating output voltages from 0.6V to V IN . The AME5249A is available in the tiny 5-pin SOT-25 and TSOT-25 package. 1.5MHz, 600mA Synchronous Buck Converter n Applications l Blue Tooth Headsets l Portable Audio Players l Mobile Phones l Wireless and DSL Modems l Digital Still Cameras l Portable Instruments n Typical Application L 4.7µH VIN 2.5V to 5.5V IN C IN 4.7µF AME5249A EN n Features V OUT SW COUT 10µF OUT GND l High Efficiency - Up to 95% l Very Low 20µA Quiescent Current l Guaranteed 600mA Output Current Figure 1. Fixed Voltage Regulator l 1.5MHz Constant Frequency Operation PWM l Internal Synchronous Rectifier Eliminates Schottky Diode l Adjustable Output Voltages From 0.6V to VIN l Fixed Output Voltage Options Available 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, 2.7V, 2.8V and L 4.7 µH VIN 2.5V to 5.5V IN CIN 4.7µF SW AME5249A EN 3.3V l 100% Duty Cycle Low-Dropout Operation VOUT 1.8V/600mA FB GND C1 22pF R1 887K R2 442K COUT 10µF l 0.1µA Shutdown Current l Require Tiny Capacitors and Inductor l Tiny SOT-25 and TSOT-25 Package Figure 2. Adjustable Voltage Regulator l All AME's Lead Free Products Meet RoHS Standards Rev.A.01 1 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Function Block Diagram EN VIN Current Limit Comparaotr 1.5 MHz Oscillator OSC Current Sense Bandgap UVLO Slope Comp FB S + EA Fixed Output See Note + COMP - R Q Logic Control SW Driver Thermal Shudown + - COMP GND Figure 3 Note: For the fixed output version the internal feedback divider is actived. For the adjustable version the internal feedback divider is disabled, and the FB pin is directly connected to the internal EA amplifer. 2 Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Pin Configuration SOT-25/TSOT-25 Top View 5 4 AME5249A-AEVxxx 1. EN 2. GND AME5249A 3. SW 4. IN 1 2 3 5. FB/OUT Die Attach: Conductive Epoxy Rev.A.01 3 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Pin Description Pin Number Pin Name Pin Description 1 EN Enable Control Input. The enable pin is an active high control. Tie this pin above 1.4V to enable the device. Tie this pin below 0.4V to shut down the device. In shutdown, all function are disabled. Do not leave EN pin floating. 2 GND Ground Tie directly to ground plane. 3 SW Switch Node Connection to Inductor. 4 IN 5 4 FB/OUT Input Supply Voltage Pin. Bypass this pin with a capacitor as close to the device as possible FB:Output voltage Feedback input. Set the output voltage by selecting values for R1 and R2 using: R1 = R2 (VOUT/0.6V -1) Connect the ground of the feedback network to an AGND (Analog Ground) plane which should be tied directly to the GND pin. OUT:Output Pin Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Ordering Information AME5249A - x x x xxx x Special Feature Output Voltage Number of Pins Package Type Pin Configuration Pin Configuration A (SOT-25) (TSOT-25) Rev.A.01 1. EN 2. GND 3. SW 4. IN 5. FB/OUT Package Type E: SOT-2X Number of Pins V: 5 Output Voltage ADJ: 100: 120: 130: 150: 180: 250: 270: 280: 330: Adjustable 1.0V 1.2V 1.3V 1.5V 1.8V 2.5V 2.7V 2.8V 3.3V Special Feature N/A: SOT-25 L: TSOT-25 (Low Profile) 5 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Available Options Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME5249A-AEVADJ CBNMXX ADJ SOT-25 -40OC to +85OC Note: 1. The first 3 places represent product code. It is assigned by AME such as CBN. 2. A bar on top of first letter represents Green Part such as CBN. 3. The last 3 places MXX represent Marking Code. It contains M as date code in "month", XX as LN code and that is for AME internal use only. Please refer to date code rule section for detail information. 4. Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. 6 Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Absolute Maximum Ratings Parameter Symbol Maximum Unit VIN -0.3 to +6.5 V VEN, VFB -0.3 to VIN V VSW, VOUT -0.3 to VIN V Input Voltage EN, FB SW, VOUT B* ESD Classification Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM B:2000V~3999V n Recommended Operating Conditions Parameter Symbol Rating Unit Input Supply Voltage VIN -0.3 to 6.5 V Ambient Temperature Range TA -40 to +85 Junction Temperature Range TJ -40 to +125 Storage Temperature Range TSTG -65 to +150 o C n Thermal Information Parameter Package Die Attach Thermal Resistance (Junction to Case) Symbol Maximum θJC 81 Unit o Thermal Resistance (Junction to Ambient) SOT-25* TSOT-25 Conductive Epoxy Internal Power Dissipation Solder Iron (10 Sec)** θJA 260 PD 400 350 C/W mW o C * Measure θJC on backside center of molding compund if IC has no tab. ** MIL-STD-202G 210F Rev.A.01 7 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Electrical Specifications VIN=3.6V, EN=VIN, TA = 25OC, unless otherwise noted Parameter Input Voltage Output Voltage Accuracy (for every fixed output voltage) Symbol Test Condition VIN ∆VOUT VIN =2.5 to 5.5V, VOUT=1.0V~1.8V PWM Mode VIN=VOUT+ ∆V to 5.5V (Note 1) VOUT=2.5V~3.3V, PWM Mode Output Voltage Accuracy (Adj) ∆VOUT Adjustable Output Range VOUT Feedback Voltage VFB Feedback Pin Bias Current IFB VIN=VOUT+ ∆V to 5.5V (Note 1) PWM Mode TA=25oC o o TA=-40 C to +85 C Min Max Units 2.5 5.5 V -3 3 -3 3 -3 3 V FB VIN0.2 0.588 0.6 0.612 0.585 0.6 0.615 -50 VFB=0.5V or VOUT=90%, Quiescent Current IQ Typ IOUT=0A VFB=0.62V or VOUT=103%, IOUT=0A 50 300 400 20 35 0.1 1 Shutdown Current ISHDN VEN =0V, VIN=4.2V Reference Voltage Line Regulation ∆VFB 2.5≦ V IN ≦ 5.5V 0.4 Output Voltage Line Regulation REGLINE 2.5≦ V IN ≦ 5.5V 0.4 Output Voltage Load Regulation REGLOAD IOUT=100mA to 600mA 0.5 High-side Switch On-Resistance RDS,ON,HI ISW =100mA 0.4 0.6 Low-side Switch On-Resistance RDS,ON,LO ISW =-100mA 0.35 0.5 Switch Current Limit ISW,CL VIN =3V, VOUT=1.2V Switch Leakage Current ISW,LK Switch Frequency fOSC 1 V EN =0V, VSW =0V or 3.6V, VIN =3.6V VFB=0.6V or VOUT=100% 1.2 % V V nA µA %/V % 1.25 Ω A 0.01 1 1.5 1.8 µA MHz Short Circuit Oscillator Frequency Maximum Duty Cycle 8 fOSC,SCR DMAX VFB=0V or VOUT=0V 0.21 100 % Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Electrical Specifications (Contd.) VIN=3.6V, EN=VIN, TA = 25OC, unless otherwise noted Symbol Test Condition Min Typ Max Input Undervoltage Lockout VUVLO VIN Rising 2 2.15 2.3 Input Undervoltage Lockout Hysteresis VUVLO,HYST Parameter Enable High (Enabled the Device) VEN,HI Enable Low (Shutdown the Device) VEN,LO EN Input Current (Enable the Device) 0.1 Units V 1.4 0.4 IEN 0.01 Thermal Shutdown Temperature OTP Shutdown, temperature increasing 160 Thermal Shutdown Hysteresis OTH Restore, temperature increasing 30 1 µA o C Note 1: ∆V=IOUT x RDS.ON.HI Rev.A.01 9 AME AME5249A 1.5MHz, 600mA Synchronous Buck Converter n Detailed Description Main Control Loop The AME5249A utilizes a fixed-frequency,current-mode PWM control scheme combined with fully-integrated power MOSFETs to produce a compact and efficient stepdown DC-DC solution. During normal operation the highside MOSFET turns on each cycle and remains on until the current comparator turns it off. At this point the lowside MOSFET turns on and remains on until either the end of the switching cycle or until the inductor current approaches zero. The error amplifier adjusts the current comparator's threshold according to the load current to ensure that the output voltage remains in regulation. Current Limit Protection The AME5249A has current limiting protection to prevent excessive stress on itself and external components. The internal current limit comparator will disable the power device at a switch peak current limit. Under extreme overloads, such as short-circuit conditions, the AME5249A reduces it's oscillator frequency to around 210KHz to allow further inductor current reduction and to minimize power dissipation. Under Voltage Protection Light Load Power Saving Mode Operation The AME5249A is capable of Power Saving Mode Operation in which the internal power MOSFETs operate intermittently based on load demand. In Power Saving Mode operation, the peak current of the inductor is set to a certain value which increases as the input voltage increases, such as 260mA for 3.6V input voltage and 340mA for 5.5V input voltage, approximately. Each switching event can last from a single cycle at very light loads to few cycles within the active intervals at moderate loads. Between these switching intervals, the unneeded circuitry are turned off, reducing the quiescent current to 20µA. In this turned off state, the load current is being supplied solely from the output capacitor. As the output voltage droops, the internal comparator trips and turns on the circuits. This process repeats at a rate depends on the load demand. Dropout Operation As the input supply voltage decreases to a value approaching the output voltage, the duty cycle increases toward the maximum on-time. Further reduction of the supply voltage forces the main switch to remain on for more than one cycle until it reaches 100% duty cycle. The output voltage will then be determined by the input voltage minus the voltage drop across the P-channel MOSFET and the inductor. 10 The AME5249A has an UVP comparator to turn the power device off in case the input voltage or battery voltage is too low. Soft Start The AME5249A integrates a soft start function that prevents input inrush current and output overshoot during start-up. During start-up the switch current limit is increased in steps. The start-up time thereby depends on the output capacitor and load current demanded at startup. Typical start-up times with a 10µF output capacitor, 3.6V input voltage and 1.5V output voltage, for 250mA load is 120µs. Thermal Shutdown The device protects itself from overheating with an internal thermal shutdown circuit. If the junction temperature exceeds the thermal shutdown trip point, the device turns off. The part is restarted when the junction temperature drops 30oC below the thermal shutdown trip point. Rev.A.01 AME AME5249A 1.5MHz, 600mA Synchronous Buck Converter n Application Information The typical AME5249A application circuit is shown in Figure1. The external component selection is driven by the load requirement. Inductor Selection Although the inductor does not influence the operating frequency, the inductor value has a direct effect on ripple current. The inductor ripple current △IL decreases with higher inductance and increases with higher VIN or VOUT: ∆I L = VIN − VOUT VOUT × L × f SW VIN The inductor must have a saturation (incremental) current rating equal to the peak switch-current limit. For high efficiency, minimize the inductor's DC resistance. The inductor value also has an effect on Power Saving Mode operation. Lower inductor values (higher ripple current) will cause the transition from PWM to Power Saving Mode to occur at lower load currents, which can cause a dip in efficiency in the upper range of low current operation. Inductor Core Selection Once the value for L is known, the type of inductor must be selected. High efficiency converters generally cannot afford the core loss found in low cost powdered iron cores, forcing the use of more expensive ferrite or mollypermalloy cores. Actual core loss is independent of core size for a fixed inductor value but it is very dependent on the inductance selected. As the inductance increases, core losses decrease. Unfortunately, increased inductance requires more turns of wire and therefore copper losses will increase. Ferrite designs have very low core losses and are preferred at high switching frequencies, so design goals can concentrate on copper loss and preventing saturation. Ferrite core material saturates "hard", which means that inductance collapses abruptly when the peak design current is exceeded. This result in an abrupt increase in inductor ripple current and consequent output voltage ripple. Do not allow the core to saturate! Different core materials and shapes will change the size/current and price/current relationship of an inductor. Rev.A.01 Toroid or shielded pot cores in ferrite or permalloy materials are small and don't radiate energy but generally cost more than powdered iron core inductors with similar characteristics. The choice of which style inductor to use mainly depends on the price vs. size requirements and any radiated field/EMI requirements. Input Capacitor Selection In continuous mode, the source current of the main power MOSFET is a square wave of duty cycle VOUT/VIN. To prevent large voltage transients, a low ESR input capacitor sized for the maximum RMS current must be used. The input filter capacitor supplies current to the main power MOSFET of AME5249A in the first half of each cycle and reduces voltage ripple imposed on the input power source. A ceramic capacitor's low ESR provides the best noise filtering of input voltage spikes due to this rapidly changing current. Select a capacitor with sufficient ripple current rating. The input capacitor's maximum RMS capacitor current is given by: I RMS ≈ I MAX (VIN − VOUT )VOUT VIN Where the maximum average output current IMAX equals the peak current ILIM minus half peak-to-peak ripple current, IMAX=ILIM-△IL/2. This formula has a maximum at VIN=2VOUT, where IRMS =IOUT/2. This simple worst-case condition is commonly used for design because even significant deviations do not offer much relief. Note that ripple current ratings from capacitor manufacturers are often based on only 2000 hours of life which makes it advisable to further derate the capacitor, or choose a capacitor rated at a higher temperature than required. Several capacitors may also be paralleled to meet size or height requirements in the design. 11 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A Output Capacitor Selection Thermal Considerations The selection of COUT is driven by the required effective series resistance (ESR). Typically, once the ESR requirement for COUT has been met, the RMS current rating generally far exceeds the IRIPPLE(P-P) requirement. The output ripple VOUT is determined by In most applications the AME5249A does not dissipate much heat due to its high efficiency. But, in applications where the AME5249A is running at high ambient temperature with low supply voltage and high duty cycles, such as in dropout, the heat dissipated may exceed the maximum junction temperature of the part. If the junction temperature reaches approximately 160OC, both power switches will be turned off and the SW node will become high impedance. To avoid the AME5249A from exceeding the maximum junction temperature, the user will need to do some thermal analysis. The goal of the thermal analysis is to determine whether the power dissipated exceeds the maximum junction temperature of the part. The temperature rise is given by: ∆VOUT ≈ ∆I L ( ESR + 1 8COUT f SW ) Where fSW =operating frequency, C OUT=output capacitance and △IL=ripple current in the inductor. For a fixed output voltage, the output ripple is highest at maximum input voltage since △IL increases with input voltage. At the light load current, the device operates in Power Saving Mode, and the output voltage ripple is independent of the value of the output capacitor. The output ripple is set by the internal comparator thresholds and is also affected by the feedback capacitor C1 in figure2. Large capacitor values can decrease the output ripple, usually a 22pF capacitor is sufficient for most applications. TR = ( PD) × θ JA Where PD is the power dissipated by the regulator and θJA is the thermal resistance from the junction of the die to the ambient temperature. When the input and output ceramic capacitors are chosen, choose the X5R or X7R dielectric formulations. These dielectrics have the best temperature and voltage characters have the best temperature and voltage characteristics of all the ceramics for a given value and size. Output Voltage Setting In the adjustable version, the output voltage is set by a resistor divider according to following formula: VOUT = 0.6V × (1 + R2 ) R1 The external resistor divider is connected to the output. 12 Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Typical Application L 4.7µH VIN 2.5V to 5.5V IN CIN 4.7µF VOUT 1.2V/600mA SW AME5249A EN IN C1 22pF FB R1 442K R2 442K GND COUT 10µF L 4.7µH IN CIN 4.7µF CIN 4.7µF VOUT 3.3V/600mA SW AME5249A EN FB GND Figure 4. AME5249A with 1.2V Output VIN 2.5V to 5.5V L 4.7µH VIN 3.6V to 5.5V C1 22pF R1 887K R2 196K COUT 10µF Figure 7. AME5249A with 3.3V Output VOUT 1.5V/600mA SW AME5249A EN C1 22pF R1 475K COUT 10µF R2 316K FB GND Figure 5. AME5249A with 1.5V Output L 4.7µH VIN 2.7V to 5.5V IN CIN 4.7µF VOUT 2.5V/600mA SW AME5249A EN FB GND C1 22pF R1 887K R2 280K COUT 10µF Figure 6. AME5249A with 2.5V Output Rev.A.01 13 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Characterization Curve Efficiency vs Output Current Efficiency vs Output Current 100 100 90 90 80 VIN=4.2V 70 Efficiency(%) Efficiency(%) VIN=2.7V VIN=3.6V 80 60 50 40 30 60 VOUT=2.5V 10 0.1 40 1 10 100 20 Oscillator Frequency(MHz) 0.610 0.605 0.600 0.595 0.590 -15 +10 +35 +60 +85 1.65 1000 VIN=3.6V 1.60 1.55 1.50 1.45 1.40 1.35 1.30 -40 +110 Temperature(oC) -15 +10 +35 +60 +85 +110 Temperature(oC) Oscillator Frequency vs Supply Voltage Quiescent Current vs Input Voltage 50 1.70 45 1.65 Quiescent Current (µA) Oscillator Frequency(MHz) 100 1.70 VIN=3.6V 0.585 14 10 Oscillator Frequency vs Temperature 0.620 1.60 1.55 1.50 1.45 1.40 40 VIN=3.6V VOUT =1.8V IOUT =0A 35 30 25 20 15 10 5 1.35 1.30 2.5 1 Output Current(mA) Reference Voltage vs Temperature Reference Voltage (V) VOUT=1.5V 10 0.1 1000 Output Current(mA) 0.580 -40 VIN=4.2V 50 30 20 0.615 VIN=2.7V VIN=3.6V 70 3.5 VIN(V) 4.5 5.5 0 2.5 3.5 4.5 5.5 VIN(V) Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Characterization Curve (Contd.) Quiescent Current vs Temperature Light Load Mode 50 Quiescent Current (µA) 45 40 V IN=3.6V V OUT=1.8V IOUT =0A VSW 5V /Div 35 30 VOUT 100mV/Div AC COUPLED 25 20 15 IL 200mA/Div 10 5 0 -40 -15 +10 +35 +60 +85 VIN=3.6V VOUT=1.8V IOUT=50mA +110 Temperature( oC) Load Step Load Step VOUT 100mV/Div AC COUPLED VOUT 100mV/Div AC COUPLED IL 500mA/Div IL 500mA/Div IOUT 500mA/Div IOUT 500mA /Div VIN=3.6V 20µS/Div VOUT =1.8V IOUT =50mA to 600mA V IN=3.6V 20µS/Div V OUT=1.8V IOUT =0mA to 600mA Load Step Load Step VOUT 100mV/Div AC COUPLED VOUT 100mV/Div AC COUPLED IL 500mA/Div IL 500mA/Div IOUT 500mA/Div IOUT 500mA/Div Rev.A.01 5µS/Div VIN=3.6V 20µS/Div VOUT =1.8V IOUT =100mA to 600mA VIN=3.6V 20µS/Div VOUT=1.8V IOUT=200mA to 600mA 15 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Characterization Curve (Contd.) Stead State Test RDS(ON) vs Temperature 0.7 VIN=3.6V VIN 200mV/Div AC COUPLED 0.6 High-Side Switch RDS(ON) (Ω) 0.5 VOUT 20mV/Div IL 100mA/Div 0.4 Low-Side Switch 0.3 0.2 VSW 2V /Div AC COUPLED 0.1 -40 VIN=3.6V VOUT=1.8V IOUT=300mA -15 +10 1µS/Div +35 +60 +85 +110 Temperature(o C) RDS(ON) vs Input Voltage Output Voltage vs Output Current 1.87 0.7 1.86 0.6 High-Side Switch 0.5 RDS(ON) (Ω) Output Voltage(V) 1.85 0.4 0.3 Low-Side Switch 1.84 1.83 1.82 1.81 1.80 1.79 0.2 1.78 0.1 2.5 1.77 3.5 4.5 0 5.5 100 200 300 400 500 Input Voltage(V) Output Current(mA) Start Up From EN Current Limit vs VIN 600 1.9 VIN 5V/Div 1.8 Current Limit(A) 1.7 EN 5V/Div VOUT 2V/Div 1.6 1.5 1.4 1.3 1.2 1.1 1.0 IL 500mA/Div 0.9 VOUT=1.2V 0.8 16 VIN=5V VOUT=3.3V IOUT=600mA 40µS/Div 0.7 2.5 2.8 3.1 3.4 3.7 4.0 VIN(V) 4.3 4.6 4.9 5.2 5.5 Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Characterization Curve (Contd.) Current Limit vs Temperature 2.10 2.00 1.90 Current Limit(A) 1.80 1.70 1.60 1.50 1.40 VIN=3.3V 1.30 1.20 VIN=3.6V VIN=5.0V 1.10 1.00 0.90 VOUT=1.2V 0.80 0.70 -40 -25 -10 +5 +20 +35 +50 +65 +80 +95 +110 +125 Temperature(oC) Rev.A.01 17 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Date Code Rule Month Code 1: January 7: July 2: February 8: August 3: March 9: September 4: April A: October 5: May B: November 6: June C: December A A A A A A A A A A A A A A A A A A A A Marking A M A M A M A M A M A M A M A M A M A M X X X X X X X X X X X X X X X X X X X X Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9 n Tape and Reel Dimension SOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 18 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev.A.01 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Tape and Reel Dimension (Contd.) TSOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev.A.01 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 19 AME 1.5MHz, 600mA Synchronous Buck Converter AME5249A n Package Dimension SOT-25 Top View Side View SYMBOLS D INCHES MIN MAX MIN MAX A 0.90 1.30 0.0354 0.0512 A1 0.00 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 E θ1 H MILLIMETERS L PIN 1 1.90 BSC e S1 e H 2.60 0.1024 0 o 10 0.1181 0.0146 BSC o 0o 0.95 BSC 10o 0.0374 BSC A1 A θ1 S1 3.00 0.37 BSC L Front View 0.0748 BSC b TSOT-25 Top View Side View SYMBOLS D MAX MIN MAX A+A1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC E e L PIN 1 S1 H 2.40 θ1 S1 3.00 0 o 10 0.95BSC 0.0945 0.1181 0.0138BSC o 0o 10 o 0.0374BSC A1 A Front View 0.07480 BSC 0.35BSC L e INCHES MIN θ1 H MILLIMETERS b 20 Rev.A.01 www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , August 2011 Document: 3005-DS5249A-A.01 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989