AME AME5283 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter n General Description The AME5283 is a Synchronous Rectified Step-Down Converter with internal power MOSFETs. It achieves 2A continuous output current over a wide switching frequency range with excellent load and line regulation. Current mode operation provides fast transient response and eases of loop stabilization. The circuit protection includes cycle-by-cycle current limiting, output short circuit frequency protection and thermal shutdown. In shutdown mode, the regulator reduces the current less than 1µA of supply current. n Typical Application L 2.2uH VIN 5V IN R4 100KΩ CIN 10uF P.G SW AME5283 OFF ON PGOOD EN COMP C2 Optional C1 680pF R1 75KΩ COUT 22uF FB SS FREQ C3 0.1uF GND R2 24KΩ RFREQ 18KΩ R3 25KΩ This device is available in SOP-8/PP and DFN-8C package with exposed pad for low thermal resistance. VOUT 3.3V n Features l 2A Output Current l External Soft Start L 1.5uH VIN 5V IN l Stable with Low ESR Output Ceramic Capacitors l Up to 95% Efficiency l Less than 1µA Shutdown Current R4 100KΩ CIN 10uF PGOOD l Wide Switching Frequency Range from 300KHz~2MHz l Thermal Shutdown l Cycle by Cycle Over Current Protection SW AME5283 P.G OFF ON EN COMP C2 Optional V OUT 1V C1 680pF R1 6KΩ FB SS FREQ GND R3 8.2KΩ C3 0.1uF COUT 22uF R2 24KΩ RFREQ 18KΩ l Output Adjustable from 0.8V to VIN l Short Circuit Protection l Available in SOP-8, DFN-8C Package l RoHS Compliant and Halogen Free n Applications l TV l Distributed Power Systems l Pre-Regulator for Linear Regulators Rev. A.03 1 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Functional Block Diagram IN CURRENT SENSE EN ENABLE UVLO CURRENT LIMIT FREQ OSC SLOPE COMP FB + + 0.8V + + EA Hiccup 10uA 0.7V - DRIVER LOGIC SW PWM IRCMP PG + SS PGND OTP UV 0.4V GND PGOOD n Pin Configuration SOP-8/PP Top View 8 7 6 5 DFN-8C (3mmx3mmx0.75mm) Top View AME5283-AZAADJ 8 7 6 5 1. COMP 2. SS 2. SS 3. EN AME5283 9 3. EN AME 5283 4. IN 9 5. SW 1 2 3 4 AME5283-AVAADJ 1. COMP 6. FREQ 4. IN 5. SW 1 2 3 4 6. FREQ 7. FB 7. FB 8. PG 8. PG 9. GND (Exposed Pad) 9. GND (Exposed Pad) * Die Attach: Conductive Epoxy * Die Attach: Conductive Epoxy Note. Connect exposed pad (heat sink on the back) to GND. 2 Rev. A.03 AME AME5283 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter n Pin Description Pin No. Pin Name Pin Description 1 COMP Compensation Node. COMP is used to compensate the regulation control loop. Connect a series RC network from COMP to GND to compensate the regulation control loop. In some cases, an additional capacitor from COMP to GND is required. 2 SS Soft-Start function. Connect a capacitor from SS to GND to set the soft-start period. 3 EN Enable. Pull EN below 0.6V to shut down the regulator. 4 IN Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Bypass IN to GND with a suitable large capacitor to eliminate noise on the input to the IC. 5 SW 6 FREQ 7 FB Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a resistive voltage divider from the output voltage. The feedback reference voltage is 0.8V. 8 PG Power-Good output. This open-drain output is low when output is out of regulation. 9 GND Rev. A.03 Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter from SW to the output load. Frequency Adjust Pin. Add a resistor from this pin to ground determines the switching frequency. Ground. Connect the exposed pad to GND. 3 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Ordering Information AME5283 - x x x xxx Output Voltage Number of Pins Package Type Pin Configuration Pin Configuration A (SOP-8/PP) A (DFN-8C) 4 1. COMP 2. SS 3. EN 4. IN 5. SW 6. FREQ 7. FB 8. PG 9. GND Package Type V: DFN Z: SOP/PP Number of Pins A: 8 Output Voltage ADJ: Adjustable 1. COMP 2. SS 3. EN 4. IN 5. SW 6. FREQ 7. FB 8. PG 9. GND Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Absolute Maximum Ratings Parameter Symbol Maximum Unit Supply Voltage V IN -0.3V to +6V V Switch Voltage V SW -1.5V to V I N +0.7V V -0.3V to V I N +0.3V V HBM 2 kV MM 200 V Symbol Rating Unit Ambient Temperature Range TA -40 to +85 Junction Temperature Range TJ -40 to +125 Storage Temperature Range TSTG -65 to +150 EN, FB, COMP, FREQ to GND ESD Classification n Recommended Operating Conditions Parameter o C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Package Die Attach SOP-8/PP Symbol θJC DFN-8C Maximum Unit 15 8.2 o Thermal Resistance (Junction to Ambient) SOP-8/PP Conductive Epoxy θJA DFN-8C 70 SOP-8/PP 1.333 PD Internal Power Dissipation DFN-8C C/W 75 mW 1.429 Maximum Junction Temperature 150 o C Lead Temperature (Soldering 10sec)** 260 o C * Measure θJC on backside center of molding compound if IC has no tab. ** MIL-STD-202G 210F Rev. A.03 5 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Electrical Specifications VIN=5V, TA=25oC, unless otherwise noted. Parameter Input Voltage Range Input UVLO Symbol Test Condition VIN Min Typ 2.5 VUVLO Quiescent Current IQ VEN =5V, VFB=0.7V (No Switching) Shutdown Current ISHDN VEN =0V Feedback Voltage VFB 0.784 Feedback Current IFB -50 Units 5.5 V 2.3 V 600 uA 0.8 1 uA 0.816 V 50 nA Load Regulation REGLOAD 0A<IOUT<2A 0.25 %/A Line Regulation REGLINE 2.7V<VIN<5.5V 0.25 %/V EN Voltage High 1.4 VEN V EN Voltage Low EN Leakage Current Switching Frequency IENLK F SW VEN =3V Error Amp Transconductance GEA Switch Leakage Current ISWLK 0.4 V 0.1 1 uA RFREQ=NC 240 300 360 KHz RFREQ =120KΩ 480 600 720 KHz RFREQ=47K Ω 0.8 1 1.2 MHz RFREQ=18KΩ 1.6 2 MHz 3.3 3.7 A 400 uA/V High-side Switch Current Limit VSW =0V, VEN =0V 0.1 20 uA High-side Switch On Resistance RDSON,HI 130 mΩ Low-side Switch On Resistance RDSON,LO 90 mΩ Thermal Shutdown Protection 6 Max OTP Rising 160 o C OTH Hysteresis 20 o C Rev. A.03 AME AME5283 n Detailed Description Normal Operation The AME5283 uses a user adjustable frequency, current mode step-down architecture with internal MOSFET switch. During normal operation, the internal high-side (PMOS) switch is turned on each cycle when the oscilla for sets the SR latch, and turned off when the comparator resets the SR latch. The peak inductor current at which comparator resets the SR latch is controlled by the output of error amplifier EA. While the high-side switch is off, the low-side switch turns on until either the inductor current starts to reverse or the beginning of the next switching cycle. 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter Hiccup Mode During hiccup mode, the AME5283 disables the highside MOSFET and begins a cool down period of 8000uS . At the conclusion of this cool down period, the regulator performs an external 800uS identical to the soft start at turn-on. ( If 10nF capacitor is used to set the soft-start) Under Voltage Protection Under Voltage Protection will activate once the feedback voltage falls below 0.4V, the operating frequency is switched to 1/10 of normal switching frequency and after four-times hiccup mode counted, the internal high-side power switch will be turned off, and latched, Unless Restart the power supply. Dropout Operation The output voltage is dropped from the input supply for the voltage which across the high-side switch. 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 high-side switch to remain on for more than one cycle until it reaches 100% duty cycle. Over Current Protection The AME5283 cycle-by-cycle limits the peak inductor current to protect embedded switch from damage. Hence the maximum output current (the average of inductor current) is also limited. In case the load increases, the inductor current is also increase. Whenever the current limit level is reached, the output voltage can not be regulated and starting to drop. Power Good Output The AME5283 power good output is an open-drain output and requires a pull up resistor. When the output voltage is 12.5% above or 12.5% below its set voltage, PGOOD will be pulled low. It is held low until the output voltage returns to within the allowed tolerances once more. During soft-start, PGOOD is actively held low and is only allowed to transition high when soft-start is over and the output voltage reaches 87.5% of its set voltage. Soft-Start Over Temperature Protectiion The in most applications the AME5283 does not dissipate much heat due to high efficiency. But, in applications where the AME5283 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, the internal high-side power switch will be turned off and the SW switch will become high impedance. The AME5283 contains an external soft-start clamp that gradually raises the output voltage. The soft-start timing is programmed by the external capacitor between SS pin and GND. The chip provides an internal charge current for the external capacitor. If 10nF capacitor is used to set the soft-start, the period will be 800uS(typ.). Rev. A.03 7 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 Inductor Selection For most applications, the value of the inductor will fall in the range of 2.2µH to 4.7µH. Its value is chosen based on the desired ripple current. Large value inductors lower ripple current and small value inductors result in higher ripple currents. Higher V IN or VOUT also increase the ripple current ∆IL: ∆I L = V 1 VOUT 1 − OUT f ×L VIN A reasonable inductor current ripple is usually set as 1/ 3 to 1/5 of maximum out current. The DC current rating of the inductor should be at least equal to the maximum load current plus half the ripple current to prevent core saturation. For better efficiency, choose a low DCR inductor. In continuous mode, the source current of the top MOSFET is a square wave of duty cycle VOUT/VIN. To prevent large voltage transients, a low ESR input capacitor sized for maximum RMS current must be used. The maximum RMS capacitor current is given by: ≅ I OMAX When choosing the input and output ceramic capacitors, choose the X5R or X7R dielectric formulations. These dielectrics have the best temperature and voltage characteristics of all the ceramics for given value and size Output Voltage Programming The AME5283 output voltage of the AME5283 is set by a resistive divider according to the following formula: R1 VOUT = 0.8 × 1 + Volt . R2 Some standard value of R1, R2 for most commonly used output voltage values are listed in Table 1. Capacitor Selection CIN requires IRMS For a fixed output voltage, the output ripple is highest at maximum input voltage since ∆IL increases with input voltage. VOUT (VIN − VOUT ) VIN This formula has a maximum at VIN=2V OUT, where IRMS=IOUT/2. For simplification, use an input capacitor with a RMS current rating greater than half of the maximum load current. VOUT(V) R1(KΩ ) R2(KΩ ) 1.1 7.5 20 1.2 10 20 1.5 17.4 20 1.8 30 24 2.5 51 24 3.3 75 24 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: 1 ∆VOUT ≅ ∆I L ESR + 8 fCOUT 8 Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 Loop Compensation Where GEA is the error amplifier transconductance The AME5283 employs peak current mode control for easy use and fast transient response. Peak current mode control eliminates the double pole effect of the output LC filter. It greatly simplifies the compensation loop design. AEA is the error amplifier voltage gain RC is the compensation resistor CC is the compensation capacitor With peak current mode control, the buck power stage can be simplified to be a one-pole and one-zero system in frequency domain. The pole can be calculated by: f P1 = 1 2π × COUT × RL The zero is a ESR zero due to output capacitor and its ESR. It can be calculated by: f Z1 = 1 2π × COUT × ESRCOUT Where COUT is the output capacitor, RL is load resistance; ESRCOUT is the equivalent series resistance of output capacitor. The compensation design is to shape the converter close loop transfer function to get desired gain and phase. For most cases, a series capacitor and resistor network connected to the COMP pin sets the pole-zero and is adequate for a stable high-bandwidth control loop. In the AME5283, FB pin and COMP pin are the inverting input and the output of internal transconductance error amplifier (EA). A series RC and CC compensation network connected to COMP pin provides one pole and one zero: for RC << A EA/GEA fP2 = fZ2 1 A G EA 2π × CC × R C + EA ≈ G EA 2π × CC × AEA 1 = 2π × CC × RC The desired crossover frequency fC of the system is defined to be the frequency where the control loop has unity gain. It is also called the bandwidth of the converter. In general, a higher bandwidth means faster response to load transient. However, the bandwidth should not be too high because of system stability concern. When designing the compensation loop, converter stability under all line and load condition must be considered. Usually, it is recommended to set the bandwidth to be less than 1/10 of switching frequency. Using selected crossover frequency, fC, to calculate RC: RC = f C × VOUT 2π × COUT × VFB GEA × G CS Where G CS is the current sense circuit transconductance. The compensation capacitor CC and resistor RC together make zero. This zero is put somewhere close to the pole fP1 of selected frequency. CC is selected by: CC = COUT × RL RC Checking Transient Response The regulator loop response can be checked by looking at the load transient response. Switching regulators take several cycles to respond to a step in load current. When a load step occurs, VOUT immediately shifts by an amount equal to (∆ILOAD x ESR), where ESR is the effective series resistance of COUT. ∆ILOAD also begins to charge or discharge COUT, which generates a feedback error signal. The regulator loop then acts to return V OUT to its steady state value. During this recovery time VOUT can be monitored for overshoot or ringing that would indicate a stability problem. Rev. A.03 9 AME AME5283 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter Efficiecny Considerations Although all dissipative elements in the circuit produce losses, one major source usually account for most of the losses in AME5283 circuits: I2R losses. The I2R loss dominates the efficiency loss at medium to high load currents. The I2R losses are calculated from the resistances of the internal switches, RSW, and external inductor RL. In continuous mode, the average output current flowing through inductor L is "chopped" between the main switch and the synchronous switch. Thus the series resistance looking into the SW pin is a function of both top and bottom MOSFET RDS(ON) and the duty cycle (D) as follows: RSW = (RDS(ON)TOP)(D) + (RDS(ON)BOTTOM )(1-D) The RDS(ON) for both the top and bottom MOSFETs can be obtained from Electrical Characteristics table. Thus, to obtained I2R losses, simply add RSW to RL and multiply the result by the square of the average output current. Other losses including CIN and COUT ESR dissipative losses and inductor core losses generally account for less than 2% total additional loss. Thermal Considerations In most application the AME5283 does not dissipate much heat due to its high efficiency. But, in applications where the AME5283 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 switch will become high impedance. 10 Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Typical Operating Circuit VIN 2.5V to 5V L 4 R4 100KΩ CIN 10µF IN SW V OUT 5 R1 8 PGOOD AME5283 6 3 FREQ EN Chip Enable RFREQ (Exposed pad) GND 9 1 COMP C1 R2 SS 2 C2 Css R3 Optional COUT FB 7 VOUT(V) C IN( µF) R1(KΩ ) R2(KΩ ) R3(KΩ ) C1(pF) L(µH) COUT(µF ) 3.3 10 75 24 25 680 2.2 22 2.5 10 51 24 20 680 2.2 22 1.8 10 30 24 15 680 1.5 22 1.5 10 21 24 13 680 1.5 22 1.2 10 12 24 11 680 1.5 22 1 10 6 24 8.2 680 1.5 22 Table 1. Recommended Components Selectin for fsw = 2MHz The ground area must provide adequate heat dissipating area to the thermal pad and using multiple vias to help thermal dissipation . R3 COMP 1 GND 8 PG 7 FB Place the feedback resistors as close to the IC as possible R2 C1 R1 SS GND 2 Css CIN must be placed between V I N and GND as close as possible VOUT GND EN 3 VI N 4 9 RFREQ GND 6 FREQ 5 SW CIN L1 COUT GND Place the input and output capacitors as close to the IC as possible SW should be connected to inductor by wide and short trace , and keep sensitive components away from this trace VOUT Figure 3. AME5283 Regulators Layout Diagram Rev. A.03 11 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Characterization Curve Efficiency vs. Output Current Efficiency vs. Output Current 100 100 90 90 80 V OUT=3.3V 70 V OUT=2.5V VOUT=1.2V V OUT=1.8V 60 Efficiency (%) Efficiency (%) 80 VOUT=1V 50 40 VIN = 5V RFREQ = 18K 10 VOUT=1.0V 50 40 VIN = 5V R FREQ= 30K 10 0 0 500 1000 1500 0 2000 Efficiency vs. Output Current 1000 1500 2000 Efficiency vs. Output Current 100 100 90 90 80 VOUT=2.5V 70 VOUT=1.8V V OUT=1.0V VOUT=3.3V 60 VOUT=1.2V 50 40 30 Efficiency (%) 80 Efficiency (%) 500 Output Current(mA) Output Current(mA) 70 VOUT=3.3V V OUT=2.5V V OUT=1.0V V OUT=1.8V 60 VOUT=1.2V 50 40 30 20 20 V IN = 5V R FREQ = 47K 10 500 1000 1500 VIN = 5V RFREQ = NC 10 0 0 Output Current(mA ) 12 VOUT =1.2V 60 20 20 0 VOUT=1.8V V OUT=3.3V 30 30 0 VOUT=2.5V 70 2000 0 500 1000 1500 2000 Output Current(mA ) Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Characterization Curve (Contd.) Load Step Load Step 1 1 VIN =3.3V VOUT=1.0V IL= 1A to 2A 2 VIN =3.3V VOUT=2.5V IL= 1A to 2A 2 Time (400µSec/DIV) Time (200µSec/DIV) 1) VOUT= 200mV/div 2) IL= 1A/div 1) VOUT= 200mV/div 2) IL= 1A/div Load Step Load Step 1 1 VIN =5.0V VOUT=1.0V IL= 1A to 2A 2 Time (200µSec/DIV) 1) VOUT= 100mV/div 2) IL= 1A/div Rev. A.03 VIN =5.0V VOUT=3.3V IL= 1A to 2A 2 Time (400µSec/DIV) 1) VOUT= 100mV/div 2) IL= 1A/div 13 AME AME5283 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter n Characterization Curve (Contd.) Power ON from EN Power off from EN 1 1 2 2 3 3 4 4 Time (400nS /DIV) Time (400uS /DIV) 1) EN= 5V/div 2) VSW= 5V/div 3) VOUT = 1V/div 4) IL = 1A/div 1) EN= 5V/div 2) VSW= 5V/div 3) VOUT = 1V/div 4) IL = 1A/div Power ON from VIN 1 1 2 2 3 3 4 4 Time ( 2.0mS /DIV ) 1) VIN= 5V/div 2) VSW= 5V/div 3) VOUT = 1V/div 4) IL = 1A/div 14 Power Off from VIN Time (2.0mS /DIV ) 1) VIN= 5V/div 2) VSW= 5V/div 3) VOUT = 1V/div 4) IL = 1A/div Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Characterization Curve (Contd.) VFB vs. Temperature Frequency vs. Temperature 0.82 450 400 Frequency (KHz) VFB (V) 0.81 0.80 0.79 350 300 250 VIN = 5V 0.78 200 0.77 40 25 10 5 20 35 50 65 80 95 110 150 125 40 25 10 Temperature (°C) 5 20 35 50 65 80 95 110 125 Temperature (°C) Frequency vs. Supply Voltage Frequency vs. Output Current 450 300 290 280 Frequency (KHz) Frequency (KHz) 400 350 300 250 VOUT = 3.3V 200 270 260 250 240 230 VIN=5.0V VOUT = 3.3V 220 210 150 3.5 4 4.5 Input Voltage(V) Rev. A.03 5 5.5 200 100 300 500 700 900 1100 1300 1500 1700 1900 IOUT (mA) 15 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 Characterization Curve (Contd.) Steady State Test Steady State Test VIN = 5V VOUT= 3.3V IOUT= 2A VIN = 5V VOUT= 1.1V IOUT= 2A 1 1 2 2 Time (400nS /DIV ) Time (400nS /DIV ) 1) VOUT= 10mV/div 2) VSW = 2V/div 1) VOUT= 10mV/div 2) VSW = 2V/div Power Good Short Circuit Test 1 VOUT 2V/DIV 2 3 VIN=5.0V VOUT = 3.3V IOUT 2A/DIV 4 Time (2ms/div) Time (100ms/DIV) 1) EN= 5V/div 2) PG= 5V/div 3) VOUT = 1V/div 4) IL = 2A/div 16 Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Tape and Reel Dimension SOP-8/PP P PIN 1 W AME AME Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP-8/PP 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm DFN-8C (3mmx3mmx0.75mm) P PIN 1 W AME AME Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size DFN-8C (3x3x0.75mm) 12.0±0.1 mm 4.0±0.1 mm 3000pcs 330±1 mm Rev. A.03 17 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Package Dimension SOP-8/PP TOP VIEW SIDE VIEW D1 SYMBOLS ? E1 E2 E L1 C PIN 1 D e A1 FRONT VIEW 18 A A2 b MILLIMETERS INCHES MIN MAX MIN MAX A 1.350 1.750 0.053 0.069 A1 0.000 0.150 0.000 0.006 A2 1.350 1.600 0.053 0.063 C 0.100 0.250 0.004 0.010 E 3.750 4.150 0.148 0.163 E1 5.700 6.300 0.224 0.248 L1 0.300 1.270 0.012 0.050 b 0.310 0.510 0.012 0.020 D 4.720 5.120 0.186 0.202 1.270 BSC e 0.050 BSC θ 0 8 E2 2.150 2.513 0.085 0.099 D1 2.150 3.402 0.085 0.134 o o 0 o 8 o Rev. A.03 AME 2A, 300KHz ~ 2MHz Synchronous Rectified Step-Down Converter AME5283 n Package Dimension (Contd.) DFN-8C (3mmx3mmx0.75mm) b D e L E E1 PIN 1 IDENTIFICATION TOP VIEW D1 BOTTOM VIEW A G1 G REAR VIEW SYMBOLS Rev. A.03 MILLIMETERS INCHES MIN MAX MIN MAX A 0.700 0.800 0.028 0.031 D 2.900 3.100 0.114 0.122 E 2.900 3.100 0.114 0.122 e 0.600 0.700 0.024 0.028 D1 2.200 2.400 0.087 0.094 E1 1.400 1.600 0.055 0.063 b 0.180 0.320 0.007 0.013 L 0.375 0.575 0.015 0.023 G 0.153 0.253 0.006 0.010 G1 0.000 0.050 0.000 0.002 19 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. , December 2012 Document: TU003-DS5283-A.03 Corporate Headquarter AME, Inc. 8F, 12 WenHu St., Nei-Hu Taipei 114, Taiwan . Tel: 886 2 2627-8687 Fax: 886 2 2659-2989