AME5150

AME, Inc. AME5150 n General Description The AME5150 is an inverting DC/DC converter operating from 1.5V to 5.5V input voltage range. It is capable of producing up to -28V of regulated negative output voltage. Built-in current-limit and fixed off-time control scheme of AME5150 provides high efficiency over a wide range of load conditions. Low supply current, 400ns fixed off-time, small package, and tiny external components makes AME5150 a extremely compact and high efficiency voltage biasing solution for battery-powered application. The AME5150 is available in a small SOT-25/TSOT-25 packages. Figure. 1 1-cell Li-lon to -15V inverting converter C1 4.7µF IN SW CF D1 15pF R2 267KΩ C3 4.7µF R1 24.9KΩ Micropower Inverting DC/DC Converter n Typical Application VIN 1.5V~5.5V L1 10µH C2 0.47µF L2 10µH -15V AME5150 EN NFB GND n Features l 1Ω Internal Switch l Use Small Surface Mount Components l Adjust Output Voltage up to -28V l 1.5V to 5.5V Input Voltage Range l Input under Voltage Lockout l 0.1 µA Shutdown Current l Internal Soft Star l All AME's Lead Free Products Meet RoHS Standards VIN 1.5V~5.5V R1 = VOUT − VNFB VNFB R2 + INFB D4 +15V 5mA C5 1µF D3 C4 1µF L1 10µH C2 0.47µF D2 -15V 5mA n Applications l Electronic Information Organizers l Palmtops l Cellular and Portable Phones l Portable Audio Systems l Various Multi-function Power Supplies C1 4.7µF IN SW AME5150 EN NFB GND CF D1 15pF R2 267KΩ C3 4.7µF R1 24.9KΩ Figure. 2 15V Dual output converter ± Rev.A.01 1 AME, Inc. AME5150 n Function Block Diagram L1 VIN C1 EN IN C2 SW L2 VOUT C3 D1 Micropower Inverting DC/DC Converter + - Enable Comp Vref VOUT R1 (EXTERNAL) + CL Adjust Current Limit 400ns one Shot Logic control UVLO Driver VIN Cs NFB (EXTERNAL) R2 GND Figure. 3 2 Rev.A.01 AME, Inc. AME5150 n Pin Configuration SOT-25/TSOT-25 Top View 5 4 Micropower Inverting DC/DC Converter AME5150AEEV 1. SW 2. GND AME5150 3. NFB 4. EN 5. IN 1 2 3 Die Attach: Conductive Epoxy n Pin Description Pin Number 1 Pin Name SW Pin Description Power Switch input. This is the drain of the internal NMOS power switch. Minimize the metal trace area connected to this pin to minimize EMI. Ground. Tie directly to ground plane. Output voltage feedback input. Set the output voltage by selecting values for R1 and R2 using: 2 GND 3 NFB R1 = VOUT − VNFB VNFB R2 + I NFB 4 EN Enable control input, active high. The enable pin is an active high control. Tie this pin above 1.5V to enable the device. Tie this pin below 0.4V to turn off the device. Analog and Power input. Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. 5 IN Rev.A.01 3 AME, Inc. AME5150 n Ordering Information AME5150 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Number of Pins V: 5 Micropower Inverting DC/DC Converter Pin Configuration A (SOT-25) (TSOT-25) Operating Ambient Temperature Range E: -40OC to 85OC Package Type E: SOT-2X Output Voltage Special Feature 1. SW 2. GND 3. NFB 4. EN 5. IN ADJ: Adjustable Z: Lead free Y: Lead free & Low profile n Ordering Information Part Number AME5150AEEVADJZ AME5150AEEVADJY Marking* BISww BISww Output Voltage ADJ ADJ Package SOT-25 TSOT-25 Operating Ambient Temperature Range -40OC to 85OC -40OC to 85OC Note: ww represents the date code and pls refer to Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as BISww. Please consult AME sales office or authorized Rep./Distributor for the availability of package type. 4 Rev.A.01 AME, Inc. AME5150 n Absolute Maximum Ratings Parameter Input Supply Voltage EN, NFB Voltages SW Voltage N-Channel Switch Sink Current ESD Classification Micropower Inverting DC/DC Converter Symbol VIN EN,VNFB VSW ISW Maximum 6 VIN VOUT + 0.3 600 B* Unit V V V mA Caution: Stress above the listed absolute rating may cause permanent damage to the device. * HBM B: 2000~3999V n Recommented Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range Storage Temperature Range Symbol TA TJ TSTG Rating - 40 to 85 - 40 to 125 - 65 to 150 Unit O C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10Sec)** SOT-25 TSOT-25 Conductive Epoxy Package Die Attach Symbol θ JC θJA PD Maximum 81 Unit o C/W 260 400 350 mW o C * Measure θJC on backside center of molding compund if IC has no tab. ** MIL-STD-202G 210F Rev.A.01 5 AME, Inc. AME5150 n Electrical Specifications VIN = 3.6V, EN = VIN, TA = 25oC, CIN = 4.7µF, IL = 0A, unless otherwise noted. Parameter Input Voltage Quiescent Current Shutdown Current Feedback Trip Point Feedback Hysteresis Switch Current Limit NFB Pin Bias Current Switch RDSON Switch Off Time Input Undervoltage Lockout EN Input Threshold (High) (Enable the device) EN Input Threshold (Low) (Shutdown) Symbol VIN IQ ISD V NFB V NFB Hysteresis ICL INFB RDSON t OFF UVLO 1.5 EN Threshold 0.4 V VNFB = -1.23V 0.6 300 VIN = 2V, VNFB = -1.3V EN = 0V -1.205 Test Condition Min 1.5 65 0.1 -1.23 5 375 2 1 400 1.2 1.4 450 2.7 1.4 Typ Max 5.5 90 1 -1.255 Units V µA µA V mV mA µA Ω nS V Micropower Inverting DC/DC Converter 6 Rev.A.01 AME, Inc. AME5150 n Detailed Description The AME5150 features a constant off-time control scheme. Operation can be best understood by referring to Figure 3. When the voltage at the NFB pin is larger than -1.23V, the Enable Comp in Figure 3 enables the device and the NMOS switch is turned on, pulling the SW pin to ground. When the NMOS switch is on, load current is supplied by the output capacitor C3. Once the current in the inductor reaches the peak current limit, the 400ns One Shot turns off the NMOS switch. During this time the energy stored in the inductor is transferred to C3 and the load. After the 400ns off-time the NMOS switch is turned on and energy is stored in the inductor again. This energy transfer from the inductor to the output causes a stepping effect in the output ripple. This cycle is continued until the voltage at NFB pin reaches -1.23V. When NFB pin reaches this voltage, the enable comparator then disables the device turning off the NMOS switch and reducing the quiescent current of the device to 65µA. The load current is then supplied solely by C3 indicated by the gradually decreasing voltage at the output. When the NFB pin drops slightly below -1.23V, the enable comparator enables the device and begins the cycle as described previously. The EN pin can be used to turn off the AME5150 and reduce the quiescent current to 0.1µA. Micropower Inverting DC/DC Converter Rev.A.01 7 AME, Inc. AME5150 n Typical Application VIN 1.5V~5.5V Micropower Inverting DC/DC Converter L1 10µH C2 0.47µF D2 -15V IN SW AME5150 C1 4.7µF EN NFB GND CF D1 15pF R2 267KΩ C3 4.7µF R1 24.9KΩ Figure. 4 1-cell Li-lon to -15V inverting charge pump converter 8 Rev.A.01 AME, Inc. AME5150 Efficiency vs. Loading 80 VIN = 4.2V VIN = 3.6V 650 700 Micropower Inverting DC/DC Converter Switch off Time vs. Temperature Switch Off Time (ns) VOUT = -15V 75 600 550 500 450 400 350 300 -40 Efficiency (%) VIN = 2.7V 70 65 60 55 1 2 3 4 5 6 7 8 9 101112 131415 16171819202122 232425 26 -20 0 20 40 60 80 100 Load Current (mA) Temperature (oC) INFB vs. Temperature 2.7 2.5 80 90 IQ vs. Temperature 2.3 2.1 70 INFB (µA) 1.9 1.7 1.5 1.3 I Q (µ A) 60 50 40 1.1 0.9 -40 30 -40 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 Temperature (oC) Temperature ( oC) EN Threshold High vs. Temperature 1.5 1.4 1.3 1.5 1.4 1.3 EN Threshold Low vs. Temperature EN Threshold (V) EN Threshold (V) 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 -40 -20 0 20 40 o 60 80 100 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 -40 -20 0 20 40 60 80 100 Temperature ( C) Temperature (oC) Rev.A.01 9 AME, Inc. AME5150 RDSON vs. Temperature 1.5 1.4 1.3 1.2 Micropower Inverting DC/DC Converter VNFB vs. Temperature 1.25 1.24 1.23 RDSON (Ω) 1.0 0.9 0.8 0.7 0.6 0.5 -40 -20 0 20 40 60 80 100 VNFB (V) 1.1 1.22 1.21 1.20 1.19 1.18 -40 Temperature (oC) -20 0 20 40 60 80 100 Temperature (oC) UVLO vs. Temperature 1.50 600 Switch Current Limit vs. Temperature Switch Current Limit (mA) 550 500 450 400 350 300 250 200 -40 1.45 1.40 1.35 UVLO (V) 1.30 1.25 1.20 1.15 1.10 1.05 1.00 -40 -20 0 20 40 60 80 100 -20 0 20 40 60 80 100 Temperature (oC) Temperature (oC) 10 Rev.A.01 AME, Inc. AME5150 n Date Code Rule Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9 Micropower Inverting DC/DC Converter n Tape and Reel Dimension SOT-25 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-25 Carrier Width (W) 8.0±0.1 mm Pitch (P) 4.0±0.1 mm Part Per Full Reel 3000pcs Reel Size 180±1 mm Rev.A.01 11 AME, Inc. AME5150 n Tape and Reel Dimension TSOT-25 P Micropower Inverting DC/DC Converter W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package TSOT-25 Carrier Width (W) 8.0±0.1 mm Pitch (P) 4.0±0.1 mm Part Per Full Reel 3000pcs Reel Size 180±1 mm 12 Rev.A.01 AME, Inc. AME5150 n Package Dimension SOT-25 Top View D L Micropower Inverting DC/DC Converter Side View SYMBOLS A A1 MILLIMETERS MIN 0.00 0.30 2.70 1.40 INCHES MIN 0.0000 0.0118 0.1063 0.0551 MAX 0.15 0.55 3.10 1.80 MAX 0.0059 0.0217 0.1220 0.0709 1.20REF 0.0472REF E b D E S1 e θ1 H e H L θ1 1.90 BSC 2.60 3.00 0.07480 BSC 0.10236 0.11811 0.0146BSC 0o 10 o 0.37BSC 0o 10 o Front View A S1 0.95BSC 0.0374BSC b TSOT-25 Top View D L A1 Side View SYMBOLS A+A1 b MILLIMETERS MIN 0.90 0.30 2.70 1.40 INCHES MIN 0.0354 0.0118 0.1063 0.0551 MAX 1.25 0.50 3.10 1.80 MAX 0.0492 0.0197 0.1220 0.0709 E D E e S1 e θ1 H 1.90 BSC 2.40 3.00 0.07480 BSC 0.09449 0.11811 0.0138BSC o H L θ1 0.35BSC 0 o 10 0o 10 o Front View A S1 0.95BSC 0.0374BSC b Rev.A.01 A1 13 www.ame.com.tw E-Mail: sales@ame.com.tw 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. , Auguest 2007 Document: 1231-DS5150-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 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