Product Change Notices PCN No.: 20080301 Date: 03/10/2008 This is to inform you that a design and process change had been made to the Following product. This notification is for your information and concurrence. If you require data or samples to qualify this change, please contact AME, Inc. within 30 days of receiving of this notification. If we do not receive any response from you within 30 calendar days from the date of this notification, we will consider that you have accepted this PCN. If you have any questions concerning this change, please contact: PCN Originator: Name: Bill Chou Email: [email protected] Expected 1st Device Shipment Date: 03/25/2008 Earliest Year/Work Week of Changed Product: 0813 Description of Change: 1. Add CSWC Semiconductor Wafers & Chips Ltd as a wafer supplier. 2. Change dropout voltage electrical spec from 1.4V max to 1.45V max. 3. Change input voltage maximum rating from 12V to 18V. Reason for Change: Add one wafer supplier and specification change. QPM018B-B AME, Inc. AME1117 n General Description The AME1117 is a 1A low-dropout positive voltage regulator. It is available in fixed and adjustable output voltage versions. Overcurrent and thermal protection are integrated onto the chip. Output current will limit as while it reaches the pre-set current or temperature limit. The dropout voltage is specified at 1.45V Maximum at full rated output current. The AME1117 series provides excellent regulation over line, load and temperature variations. 1A Low Dropout Positive Voltage Regulator n Functional Block Diagram Input Current Limiting Amplifier Thermal Protection Output n Features l Low Dropout Voltage ----- 1.45V at 1A Error Amp. Bandgap Reference l Adjustable or Fixed Voltages: ADJ/COM 1.8V, 2.5V, 3.3V, 5.0V l Adjust Pin Current Less than 120µA l Overcurrent Protection l Thermal Protection l Available in TO-220, TO-252, SOT-223 n Typical Application l All AME's Lead Free Products Meet RoHS Standards V IN AME1117 V OUT GND n Applications 10µF Tan 10µF Tan Load l High Efficiency Linear Regulators l Post Regulators for Switching Supplies l 5V to 3.3V Voltage Converter l Battery Charger Rev.T.01 1 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Pin Configuration TO-220-3 Front View SOT-223 Front View AME1117 AME1117 1. ADJ / GND 1. ADJ / GND 2. OUT (TAB) AMExxxx AME1117 3. IN * Die Attach: Conductive Epoxy 1 2 AME1117 2. OUT (TAB) 3. IN 1 2 3 * Die Attach: Conductive Epoxy 3 TO-252-2 Front View AME1117 1. ADJ / GND AME1117 2. OUT (TAB) 3. IN 1 2 2 3 * Die Attach: Conductive Epoxy Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Ordering Information AME1117 x x x x x Special Feature Number of Pins Package Type Operating Ambient Temperature Range Product Grade or Option Product Grade or Option A: B: C: D: E: ADJ 2.5V 3.3V 5.0V 1.8V Rev.T.01 Operating Ambient Temperature Range C: 0OC to 70OC Package Type B: TO-220 C: TO-252 G: SOT-223 Number of Pins T: 3 Special Feature Z: Lead Free 3 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Ordering Information (contd.) Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME1117ACGT ABEyww ADJ SOT-223 0oC to 70oC AME1117ACGTZ ABEyww ADJ SOT-223 0oC to 70oC AME1117BCGT AKEyww 2.5 SOT-223 0oC to 70oC AME1117BCGTZ AKEyww 2.5 SOT-223 0oC to 70oC AME1117CCGT ABFyww 3.3 SOT-223 0oC to 70oC AME1117CCGTZ ABFyww 3.3 SOT-223 0oC to 70oC AME1117DCGT AKFyww 5.0 SOT-223 0oC to 70oC AME1117DCGTZ AKFyww 5.0 SOT-223 0oC to 70oC AME1117ECGT AXHyww 1.8 SOT-223 0oC to 70oC AME1117ECGTZ AXHyww 1.8 SOT-223 0oC to 70oC ADJ TO-252-2 0oC to 70oC ADJ TO-252-2 0oC to 70oC 2.5 TO-252-2 0oC to 70oC 2.5 TO-252-2 0oC to 70oC 3.3 TO-252-2 0oC to 70oC 3.3 TO-252-2 0oC to 70oC AME1117ACCT AME1117ACCTZ AME1117BCCT AME1117BCCTZ AME1117CCCT AME1117CCCTZ AME1117 ACCT yyww AME1117 ACCT yyww AME1117 BCCT yyww AME1117 BCCT yyww AME1117 CCCT yyww AME1117 CCCT yyww Note: yyww & yww represent the date code * A line on top of the first letter represents lead free plating such as AME1117. Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. 4 Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Ordering Information Part Number AME1117DCCT AME1117DCCTZ AME1117ECCT AME1117ECCTZ AME1117ACBT AME1117ACBTZ AME1117BCBT AME1117BCBTZ AME1117CCBT AME1117CCBTZ AME1117DCBT AME1117DCBTZ AME1117ECBT AME1117ECBTZ Rev.T.01 Marking* AME1117 DCCT yyww AME1117 DCCT yyww AME1117 ECCT yyww AME1117 ECCT yyww AME1117 ACBT yyww AME1117 ACBT yyww AME1117 BCBT yyww AME1117 BCBT yyww AME1117 CCBT yyww AME1117 CCBT yyww AME1117 DCBT yyww AME1117 DCBT yyww AME1117 ECBT yyww AME1117 ECBT yyww Output Voltage Package Operating Ambient Temperature Range 5.0 TO-252-2 0oC to 70oC 5.0 TO-252-2 0oC to 70oC 1.8 TO-252-2 0oC to 70oC 1.8 TO-252-2 0oC to 70oC ADJ TO-220 0oC to 70oC ADJ TO-220 0oC to 70oC 2.5 TO-220 0oC to 70oC 2.5 TO-220 0oC to 70oC 3.3 TO-220 0oC to 70oC 3.3 TO-220 0oC to 70oC 5.0 TO-220 0oC to 70oC 5.0 TO-220 0oC to 70oC 1.8 TO-220 0oC to 70oC 1.8 TO-220 0oC to 70oC 5 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Absolute Maximum Ratings Parameter Package Die Attach Symbol TO-220-3 Thermal Resistance* (Junction to Case) TO-252-2 Maximum Unit 6 Conductive Epoxy θJC SOT-223 5 25 o TO-220-3 Thermal Resistance (Junction to Ambient) Internal Power Dissipation TO-252-2 Conductive Epoxy θJA 90 SOT-223 120 TO-220-3 2200 TO-252-2 C/W 55 Conductive Epoxy PD SOT-223 1200 mW 900 Input Voltage VIN 18 Operating Junction Temperature Range TJ 0 to 125 o C TSTG -65 to 150 o C 350 o C Storage Temperature Range Solder Iron (10 Sec)** V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * Measure θJC on backside center of tab. ** MIL-STD-202G 210F 6 Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Electrical Specifications AME1117Exxx Parameter Symbol Test Condition Min o Output Voltage VOUT Line Regulation REGLINE Load Regulation REGLOAD Dropout Voltage VDROPOUT IS Current Limit Quiescent Current IQ Temp. Coefficient TC Temperature Stability RMS Output Noise Ripple Rejection Ratio TS VN RA VIN = 5V, IO = 0A VIN = 4.75V to 7V, IO = 0A VIN = 5V, TJ =25 C o Typ Max 1.782 1.800 1.818 o TJ =0 C to 70 C TJ =0oC to 70oC 1.764 1.800 1.836 - - Units V 0.2 % o o TJ =0 C to 70 C - 0.1 1.0 IO = 1A, ∆Vo = ±1% TJ =0oC to 70oC - 1.2 1.45 V VIN = 4.75V to 7V TJ =0oC to 70oC 1.0 1.5 - A - 6.0 13 mA - 0.005 - %/ºC - 0.5 - % - 0.003 - %V O 60 72 - dB Min Typ Max Units IO = 0A~1A VIN = 5V, IO = 0A to 1A o o TJ =0 C to 70 C VIN = 4.75V to 7V, IO = 0A to 1A VIN = 5V, IO = 100mA o TJ =0 C to 70 C o 10HZ <= f <=10KHZ VIN = 5V, IO = 1A o TJ =25 C o o TJ =0 C to 70 C AME1117Dxxx Parameter Symbol Test Condition o Output Voltage VOUT Line Regulation REGLINE Load Regulation REGLOAD Dropout Voltage VDROPOUT IS Current Limit Quiescent Current IQ Temp. Coefficient TC Temperature Stability RMS Output Noise Ripple Rejection Ratio Rev.T.01 TS VN RA VIN = 7V, IO = 0A VIN =7V to 9V, IO = 0A VIN = 7V TJ =25 C o 4.950 5.000 5.050 o TJ =0 C to 70 C TJ =0oC to 70oC 4.900 5.000 5.100 - - V 0.2 % o o TJ =0 C to 70 C - 0.1 1.0 IO = 0A to 1A, ∆Vo = ±1% TJ =0oC to 70oC - 1.2 1.45 V VIN = 7V to 10V TJ =0oC to 70oC 1.0 1.5 - A - 6.0 13 mA - 0.005 - %/ºC - 0.5 - % - 0.003 - %V O 60 72 - dB IO = 0A~1A VIN = 7V, IO = 0A to 1A o o TJ =0 C to 70 C VIN = 7V to 10V, IO = 0A to 1A VIN = 5V, IO = 100mA 10HZ <= f <=10KHZ VIN = 5V, IO = 1A o o TJ =0 C to 70 C o TJ =25 C o o TJ =0 C to 70 C 7 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Electrical Specifications AME1117Cxxx Parameter Symbol Output Voltage VOUT Line Regulation REGLINE Load Regulation REGLOAD Dropout Voltage VDROPOUT IS Current Limit Quiescent Current IQ Temp. Coefficient TC Temperature Stability RMS Output Noise Ripple Rejection Ratio TS VN RA Test Condition VIN = 5V, IO = 0A VIN = 4.75V to 7V, IO = 0A VIN = 5V Min TJ =25oC o Typ Max 3.270 3.300 3.330 o TJ =0 C to 70 C TJ =0oC to 70oC 3.234 3.300 3.366 - - Units V 0.2 % o o TJ =0 C to 70 C - 0.1 1.0 IO = 0A to 1A, ∆Vo = ±1% TJ =0oC to 70oC - 1.2 1.45 V VIN = 4.75V to 7V TJ =0oC to 70oC 1.0 1.5 - A - 6.0 13 mA - 0.005 - %/ºC - 0.5 - % - 0.003 - %V O 60 72 - dB Min Typ Max Units IO = 0A to 1A VIN = 5V, IO = 0A to 1A o o TJ =0 C to 70 C VIN = 4.75V to 7V, IO = 0A~1A VIN = 5V, IO = 100mA o TJ =0 C to 70 C o 10HZ <= f <=10KHZ VIN = 5V, IO = 1A o TJ =25 C o o TJ =0 C to 70 C AME1117Bxxx Parameter Symbol Test Condition o Output Voltage VOUT Line Regulation REGLINE Load Regulation REGLOAD Dropout Voltage VDROPOUT IS Current Limit Quiescent Current IQ Temp. Coefficient TC Temperature Stability RMS Output Noise Ripple Rejection Ratio 8 TS VN RA VIN = 5V, IO = 0A VIN = 4.75V to 7V, IO = 0A VIN = 5V TJ =25 C o 2.475 2.500 2.525 o TJ =0 C to 70 C TJ =0oC to 70oC 2.450 2.500 2.550 - - V 0.2 % o o TJ =0 C to 70 C - 0.1 1.0 IO = 0A to 1A, ∆Vo = ±1% TJ =0oC to 70oC - 1.2 1.45 V VIN = 4.75V to 7V TJ =0oC to 70oC 1.0 1.5 - A - 6.0 13 mA - 0.005 - %/ºC - 0.5 - % - 0.003 - %V O 60 72 - dB IO = 0A to 1A VIN = 5V, IO = 0A to 1A o o TJ =0 C to 70 C VIN = 4.75V to 7V, IO = 0A~1A VIN = 5V, IO = 100mA 10HZ <= f <=10KHZ VIN = 5V, IO = 1A o o TJ =0 C to 70 C o TJ =25 C o o TJ =0 C to 70 C Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Electrical Specifications AME1117Axxx Parameter Reference Voltage Line Regulation * Test Condition Symbol VIN = 5V, VREF REGLINE Load Regulation REGLOAD Dropout Voltage VDROPOUT Current Limit Min o TJ =25 C o IO = 10mA IO = 10mA Max 1.238 1.250 1.262 o TJ =0 C to 70 C VIN = 4.75V to 7V, Typ 1.225 1.250 1.275 TJ =0oC to 70oC - - Units V 0.2 % VIN = 5V, o o TJ =0 C to 70 C - 0.1 1.0 IO = 10mA to 1A, ∆Vo = ±1% TJ =0oC to 70oC - 1.2 1.45 V IS VIN = 2.7V to 7V TJ =0oC to 70oC 1.0 1.5 - A Temp. Coefficient TC VIN = 2.75V to 7V, IO = 10mA to 1A - 0.005 - %/ºC Adjust Pin Current IADJ - 55 120 IO = 10mA to 1A VIN = 2.75V to 7V, IO = 10mA to 1A ∆IADJ VIN = 2.75V to 7V, Temperature Stability TS VIN = 5V, IO = 100mA Minimum Load Current IO RMS Output Noise VN Adjust Pin Current Change Ripple Rejection Ratio RA IO = 10mA to 1A TJ =0oC to 70oC µA o o TJ =0 C to 70 C - 0.2 TJ =0oC to 70oC - 0.5 - 5.0 10 mA - 0.003 - %V O 60 72 - dB VIN = 5V TJ =25oC 10HZ <= f <=10KHZ VIN = 5V, IO = 1A o o TJ =0 C to 70 C 5.0 % *Line regulation test circuit VOUT VIN IN OUT ADJ 10µF Tan Rev.T.01 164 100 10µF Tan 9 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Application Description 1. Output Voltage Adjustment 3. Current Limit Protection Like most regulators, the AME1117 regulates the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version, the VREF is available externally as 1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minimum output load). The output voltage is given by the following equation: R2 VOUT = VREF ( 1 + ) + IADJ x R2 R1 AME1117 is protected against overload conditions. Current protection is triggered at typically 1.5A. On fixed versions of AME1117, the voltage divider is provided internally. VIN VOUT IN OUT ADJ C1 VREF AME1117 requires a capacitor from V OUT to GND to provide compensation feedback to the internal gain stage. This is to ensure stability at the output terminal. Typically, a 10µF tantalum or 50µF aluminum electrolytic is sufficient. (Note: It is important that the ESR for this capacitor does not exceed 0.5Ω.) The output capacitor does not have a theoretical upper limit and increasing its value will increase stability. COUT = 100µF or more is typical for high current regulator design. R1 IADJ 55µA R2 VOUT 4. Stability and Load Regulation = VREF (1+ R2 ) + IADJ x R2 R1 For the adjustable version, the best load regulation is accomplished when the top of the resistor divider (R1) is connected directly to the output pin of the AME1117. When so connected, RP is not multiplied by the divider ratio. For fixed output versions, the top of R1 is internally connected to the output. The ground pin can be connected to the low side of the load in order to eliminate ground loop errors. 2. Thermal Protection AME1117 has thermal protection which limits junction temperature to 150oC. However, device functionality is only guaranteed to a maximum junction temperature of +125oC. The power dissipation and junction temperature for AME1117 is given by PD = (V IN - VOUT) x IOUT RP Parasitic Line Resistance VIN IN OUT ADJ R1 (Connect R1 to case) RL R2 TJUNCTION = TAMBIENT + ( P D x θJA) Note: TJUNCTION must not exceed 125oC 10 Connect R2 to load Rev.T.01 AME, Inc. AME1117 1A Low Dropout Positive Voltage Regulator 5. Thermal Consideration The AME1117 series contain thermal limiting circuitry designed to protect itself from over-temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As mentioned in thermal protection section, we need to consider all sources of thermal resistance between junction and ambient. It includes junction-to-case, case-to-heat-sink interface and heat sink thermal resistance itself. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. Proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. The case of all devices in this product series is electrically connected to the output. Therefore, if the case of the device must be electrically isolated, a thermally conductive spacer is recommended. Rev.T.01 11 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Advanced Applications (contd.) Adjustable Output Voltage VIN = 5V VIN AME1117 V OUT * V O = 1.5 - 3.45V ADJ R1 10µF 10µF 1K ** 10µF R2 2K Note: * VOUT = VREF ( 1 + R2 R1 ) + IADJ x R2 ** Optional for improved ripple rejection Paralleling Regulators VIN VOUT VIN AME1117 V OUT * 20mΩ IO = 0 to 2A GND 10µF 10µF VIN AME1117 VOUT * 20mΩ GND Note: * 20mΩ is ballast resistance The inter - connection of #18 wire could act as ballast resistance 12 Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Advanced Applications Regulator with Reference VIN * VO V IN AME1117 VOUT GND 10µF 10µF 1K ** 10µF Note: Zener diode or voltage reference * VO = VREF + VZ (V Z: breakdown voltage of Zener diode) ** Optional for improved ripple rejection Regulator with Reverse Diode Protection VIN VIN AME1117 *VO VOUT GND 10µF Rev.T.01 10µF 13 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 Temperature Stability (For Fixed Voltage) 1.252 IO=0mA IO=10mA 1.250 -0.05 Reference Voltage (V) O utput Voltage deviation (%) 0.00 Temperature Stability (For Adjustable Voltage) -0.10 -0.15 -0.20 1.248 1.246 1.244 1.242 1.240 1.238 -50 -0.25 -50 -30 -10 10 30 50 70 90 -25 0 25 Short Circuit Current TJ =25O C 125 TJ=25 OC 1.20 2.5 Drop-out Voltage (V) Output Short Circuit Current (A) 100 Dropout Voltage 2.0 1.5 1.0 0.5 1.15 1.10 1.05 1.00 0.95 0.0 0.90 1 2 3 4 5 6 7 8 9 10 0 0.2 Input/Output Differential Voltage(V) Adjust Pin Current 0.6 0.8 1 Minimum Operating Current 7 Minim um Operation Current (mA) 40 35 30 25 20 15 10 5 0 -50 0.4 Load Current (A) 45 Adjust Pin Current (µA) 75 1.25 3.0 -25 0 25 50 75 Temperature (oC) 14 50 Temperature (o C) Temperature (oC) 100 125 6 TJ=25 OC 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 Input/Output Differential Voltage(V) Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 Load Current(A) Output Voltage Deviation (V) Load Transient Response 0.1 Line Transient Response TJ =25O C C IN=10µF 30mV ∆VO 0 -0.1 0 C OUT =10µF C OUT =1µF C OUT =0µF -30mV V IN=5V V O=3.3V Preload=100mA 2 1 IO C IN=C O =1mF, IO =0.1A, VO=3.3V VIN 6V 0 0.0 5V 25 Time (µS) Rev.T.01 TJ =25 OC VO Deviation 50 Time (µS) 15 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Tape and Reel Dimension TO-252-2 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 TO-252-2 16.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm SOT-223 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 16 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-223 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm Rev.T.01 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Package Dimension SOT-223 Top View Side View SYMBOLS D B1 θ C 13 o(4X) H E PIN 1 e Front View INCHES MIN MAX MIN MAX A1 0.01 0.10 0.0004 0.0039 B 0.60 0.84 0.0236 0.0330 B1 2.90 3.15 0.1140 0.1240 C 0.24 0.38 0.0094 0.0150 D 6.30 6.71 0.2480 0.2640 E 3.30 3.71 0.1299 0.1460 F 1.40 1.80 0.0551 0.0709 2.30 BSC e 13 o(4X) H F θ A1 MILLIMETERS 6.70 0 o 0.0906 BSC 7.30 10 o 0.2638 0 o 0.2874 10o B TO-220-3 Top View G Side View C D Bottom View SYMBOLS A I P P1 G1 PIN 1 M O N Rev.T.01 K E MILLIMETERS INCHES MIN MAX MIN MAX A 5.58 7.49 0.2197 0.2949 C 2.03 4.83 0.0799 0.1902 D 0.50 1.40 0.0197 0.0551 E 0.30 1.15 0.0118 0.0453 G 9.65 10.67 0.3799 0.4201 I 3.53 4.09 0.1390 0.1610 K 0.50 1.15 0.0197 0.0453 M 1.14 1.78 0.0449 0.0701 N 2.28 2.80 0.0898 0.1102 O 12.70 14.74 0.5000 0.5803 P 14.22 16.51 0.5598 0.6500 P1 5.00 5.70 0.1969 0.2244 G1 7.30 8.05 0.2874 0.3169 17 AME, Inc. 1A Low Dropout Positive Voltage Regulator AME1117 n Package Dimension TO-252-2 Top View Side View SYMBOLS E K D1 L F E1 G PIN 1 J C H D INCHES MIN MAX MIN MAX A 0.43 0.58 0.0169 0.0230 B 1.60 1.95 0.0630 0.0768 C 0.51 1.78 0.0200 0.0701 D 0.43 0.60 0.0169 0.0236 E 6.35 6.80 0.2500 0.2677 F 5.36 7.20 0.2110 0.2835 G 2.20 3.00 0.0866 0.1181 H - * 2.30 - *0.0906 J - 0.97 - 0.0380 K 5.20 5.50 0.2047 0.2165 B A MILLIMETERS L 1.40 REF 0.0551 REF D1 E1 3.80 REF 3.81 5.10 0.1496 REF 0.1500 0.2008 *: Typical Value Notes: 1. Controlling dimension: Millimeters. 2. Maximum lead thickness includes lead finish thickness Minimum lead thickness is the minimum thickness of base material. 18 Rev.T.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. , March 2008 Document: 1014-DS1117-T.01 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989 U.S.A.(Subsidiary) Analog Microelectronics, Inc. 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2438 Tel : (408) 988-2388 Fax: (408) 988-2489