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| AME, Inc. AME7720 / 7721 n General Description The AME7720 / 7721 is switched-capactitor voltage doublers that delivers a regulated output. No external inductor is required for operation. Using three small capacitors, the AME7720 / 7721 can deliver up to 60mA to the voltage regulated output. The AME7720 / 7721 features very low output pipple and high efficiency over a large portion of its load range making this device ideal for battery-powered applications. Furthermore, the combination of few external components and small package size keeps the total converter board area to a minimum in space restricted applications. The AME7720 / 7721 contains a thermal management circuit to protect the device under continuous output short circuit conditions. The AME7720 / 7721 is available in SOT-25 / SOT-26 package and is rated from -40OC to 85OC. Step-Up/Step-Down 60mA Regulated Charge Pump n Applications l Cellular Phone l Digital Camera l PDAs LCD display l LED/Display Back Light Driver l Smart Card Reader l SIM Card Supply l PCMCIA Card l LCD Display n Functional Block Diagram AME7720 VIN 2 CC+ 1 n Features l Input Voltage Range: 5V Version: 2.7V to 5.5V 3.3V Version: 1.8V to 5.5V l Accurate to with 5% l Output Current: 5V Version: 60mA with VIN>=3.0V 3.3V Version: 60mA with VIN >=2.2V l 1MHZ Switching Frequency l Shutdown Mode < 1A (AME7720) l Short Circuit Protection:Typ. 80mA l Over Temperature Protection l All AME' s Lead Free Product Meet RoHS Standards VIN EN 1 2 VOUT 1 2 EA Control GND AME7721 CC+ 2 1 1 2 V OUT 1 2 EA Control GND 1 AME, Inc. AME7720 / 7721 n Typical Application AME7720 5V / 60mA VOUT C OUT =2.2F GND Step-Up/Step-Down 60mA Regulated Charge Pump C+ CPUMP = 0.22F 3.0V to 5.5V VIN VIN VOUT AME 7720 C IN=2.2F C- EN ON OFF AME7721 5V / 60mA VOUT C OUT =2.2F GND C+ CPUMP = 0.22F 3.0V to 5.5V VIN VIN VOUT AME 7721 CC IN=2.2F 2 AME, Inc. AME7720 / 7721 n Pin Configuration SOT-26 Top View 6 5 4 Step-Up/Step-Down 60mA Regulated Charge Pump SOT-25 Top View AME7720BEEY 1. VOUT 2. GND 5 4 AME7721BEEV 1. VOUT 2. GND AME7720 3. C4. VIN 5. C+ AME7721 3. C4. VIN 5. C+ 1 2 3 6. EN * Die Attach: Conductive Epoxy 1 2 3 * Die Attach: Conductive Epoxy n Pin Description Pin Number AME7720 1 AME7721 1 VOUT Regulator output pin. VOUT should be bypassed with a 2.2F low ESR ceramic capacitor. Ground pin connection. Pin Name Pin Description 2 2 GND 3 3 C- Pump capacitor negative terminal. Input supply pin. VIN should be bypassed with a 2.2F low ESR ceramic capacitor. Pump capacitor positive terminal. Shutdown input. Active Low disable the regulator. 4 4 VIN 5 5 C+ 6 N/A EN 3 AME, Inc. AME7720 / 7721 n Ordering Information AME7720/7721 x x x x xxx x Special Feature Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration AME7720 Step-Up/Step-Down 60mA Regulated Charge Pump Operating Ambient Temperature Range E: -40OC to 85OC Package Type E: SOT-2X Number of Pins V: 5 Y: 6 Voltage 500: V=5V Special Feature Y: Lead free & Low profile Z: Lead free B (SOT-26) 1. VOUT 2. GND 3. C4. VIN 5. C+ 6. EN 1. VOUT 2. GND 3. C4. VIN 5. C+ AME7721 B (SOT-25) n Ordering Information Part Number AME7720BEEY500Z AME7720BEEY500Y AME7721BEEV500Z AME7721BEEV500Y Marking* BECww BECww BEGww BEGww Output Voltage 5V 5V 5V 5V Package SOT-26 TSOT-26 SOT-25 TSOT-25 Operating Ambient Temperature Range - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC Note: ww represents the date code and pls refer to Date Code Rule before Package Dimension. * A line on top of the first letter represents lead free plating such as BECww. Please consult AME sales office or authorized Rep./Distributor for the availability of package type. 4 AME, Inc. AME7720 / 7721 n Absolute Maximum Ratings Parameter Input Voltage ESD Classification Step-Up/Step-Down 60mA Regulated Charge Pump Maximum 5.5 C* Unit V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM C:4000V+ n Recommended Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range Symbol TA TJ Rating - 40 to + 85 - 40 to + 125 Unit o C C o n Thermal Information Parameter Thermal Resistance* (Junction to Case) Package SOT-26 SOT-25 SOT-26 SOT-25 SOT-26 Die Attach Conductive Epoxy Symbol JC Maximum 81 Unit Conductive Epoxy o C/W Thermal Resistance (Junction to Ambient) Conductive Epoxy JA Conductive Epoxy Conductive Epoxy PD 400 mW Conductive Epoxy 150 350 o 260 Internal Power Dissipation SOT-25 Maximum Junction Temperature Solder Iron (10Sec)** * Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F C 5 AME, Inc. AME7720 / 7721 n Electrical Specifications(AME7720) TA=-40OC to +85OC, VIN = VOUT/2+0.75V, IOUT = 5mA , CIN = COUT=2.2F , CPUMP = 0.22 F, V EN =1.3V Typical Values are at TA=25OC. Parameter Input Voltage Symbol VIN Test Conditions VOUT = 5V VOUT = 3.3V IOUT <= 15mA, 2.7V < VIN < 5.5V Output Voltage VOUT IOUT <= 60mA, 3.0V < VIN < 5.5V IOUT <= 15mA, 1.8V < VIN < 5.5V IOUT <= 60mA, 2.2V < VIN < 5.5V 1.8V < VIN < 5.5V, Quiescent Current IQ IOUT = 0mA 1.8V < VIN < 5.5V, EN = GND TA=-40~+85 C 0.01 60 80 50 TA=25oC 90 1.0 1.3 0.6 EN = VIN EN = GND VIN = 3V, IOUT = 60mA TA=25oC 0.15 160 20 0.1 0.1 0.1 mA mA mVp-p % MHz V V A A ms o o Step-Up/Step-Down 60mA Regulated Charge Pump Min 2.7 1.8 4.75 Typ Max 5.5 5.5 Units V 5 5.25 V 3.14 3.3 60 3.46 100 A Output Current Short Circuit Current Limit Ripple Voltage1 Efficiency Frequency EN Input Threshold High EN Input Threshold Low EN Input Current High EN Input Current Low VOUT Turn-on time Over Temperature Shutdown Over Temperature Hysterisis IOUT ISC VRIPPLE fOSC VIH VIL IIH IIL tON OTS OTH VOUT = 5V VOUT = GND VIN = 3V, IOUT = 60mA IOUT = 15mA, VIN = 2.7V Oscillator Free Running C Note 1: Effective series resistance (ESR) of capacitors is < 0.1. 6 AME, Inc. AME7720 / 7721 n Electrical Specifications(AME7721) TA=-40OC to +85OC, VIN = VOUT/2+0.75V, IOUT = 5mA CIN = 2.2F , CPUMP = 0.22 F Typical Values are at TA=25OC Parameter Input Voltage Symbol VIN Test Conditions VOUT = 5V VOUT = 3.3V IOUT <= 15mA, 2.7V < VIN < 5.5V Output Voltage VOUT IOUT <= 60mA, 3.0V < VIN < 5.5V IOUT <= 15mA, 1.8V < VIN < 5.5V IOUT <= 60mA, 2.2V < VIN < 5.5V Quiescent Current Output Current Short Circuit Current Limit Ripple Voltage1 Efficiency Frequency VOUT Turn-on time Over Temperature Shutdown Over Temperature Hysterisis IQ IOUT ISC VRIPPLE fOSC tON OTS OTH 1.8V < VIN < 5V, IOUT=0mA TA=-40~+85oC 60 80 50 TA=25oC 90 1.0 TA=25oC 0.15 160 20 Min 2.7 1.8 4.75 5 Typ Max 5.5 5.5 5.25 V 3.14 3.3 60 3.46 100 A mA mA mVp-p % MHz ms o Step-Up/Step-Down 60mA Regulated Charge Pump Units V VOUT = 5V VOUT = GND VIN = 3V, IOUT = 60mA IOUT = 15mA, VIN = 2.7V Oscillator Free Running VIN = 3V, IOUT = 60mA C Note 1: Effective series resistance (ESR) of capacitors is < 0.1. 7 AME, Inc. AME7720 / 7721 n Detailed Description The AME7720 / 7721 regulated charge pump provides a regulated output voltages ranging from less than the output to greater than the output. This is accomplshed by automatic mode switching within the device. Step-Up/Step-Down 60mA Regulated Charge Pump n Efficiency The efficiency of the charge pump regulator varies with the output voltage version, the applied input voltage, the load current, and the internal operation mode of the device. The approximate efficiency is given by: 5V Version (V IN<= VOUT) Efficiency (%) = VOUT / 2V IN D100 3.3V Version (V IN> VOUT) Efficiency (%) = VOUT / VIN D100 n Short Circuit and Thermal Protection The AME7720 / 7721 has a thermal protection and shutdown circuit that continuously monitors the IC junction temperature. If the thermal protection circuit senses the die temperature exceeding approximately 160OC, the thermal shutdown will disable the charge pump switching cycle operation, The thermal limit system has 20OC of system hysteresis before the charge pump can reset. Once the over current event is removed from the output and the junction temperature drops below 140OC, the charge pump will the become active again. The thermal protection system will cycle on and off if an output short circuit condition persists. This will allow the AME7720 / 7721 to operate indefinitely a short circuit condition without damage to the device. n Layout Large ripple currents flow in the V IN and V OUT traces. To minimized both input and output ripple, keep the capacitors as close as possible to the regulator using short, direct circuit traces. The trace lengths from the input and output capacitors have been kept as short as possible. A star ground system has been implemented, with GND pin as the center of the star. No ground plane is provided in other layers, as this will provide capacitive coupling for noise spikes. n Shutdown Mode A control pin on the regulator can be used to place the device into an energy-saving shutdown mode. In this mode, the output is disconnected from the input as long as VIN is greater than or equal to minimum VIN and input quiescent current is reduced to 1A maximum. n Capacitor Selection For minimum output voltage ripple, the output capacitor COUT should be a ceramic, surface-mount type. Tantalum capacitors generally have a higher Effective Series Resistance (ESR) and may contribute to higher output voltage ripple. Leaded capacitors also increase ripple due to the higher inductance of the package itself. To achieve best operation with low input voltage and high load current, the input and pump capacitors (CIN, CPUMP respecvively) should also be surface-mount ceramic types. In all cases, X7R or X5R dielectric are recommended. With light loads or higher input voltage, a smaller 0.1F pump capacitor (CPUMP) and smaller 1F input and output capacitor (CIN and COUT, respectively) can be used. To minimize output voltage ripple, increase the output capacitor, COUT, to 10F or larger. 8 AME, Inc. AME7720 / 7721 Efficiency vs. VIN 100 90 Step-Up/Step-Down 60mA Regulated Charge Pump Short-Circuit Load Current vs VIN 250 225 L oad Curren t (mA) 80 200 175 150 125 100 75 50 25 0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Efficien cy (%) 70 60 50 40 30 20 10 0 1.5 2 2.5 2.7 3 3.5 4 V OUT=5V 4.5 5 5.5 VIN (V) VIN (V) Shutdown Supply Current vs Temperature Shutdown Supply Current (nA) 20 Maximum Load Current vs Input Voltage 120 Maximum L oad Current (mA) 18 16 14 12 10 8 6 4 2 110 100 90 80 70 60 50 40 30 20 10 0 1.5 2 2.5 2.7 3 3.5 3.6 4 EN=Low TA <=85 oC 0 -40 -30 -20 -10 0 10 20 30 40 o 50 60 70 80 90 4.5 5 5.5 Temperature ( C) VI N (V) Efficiency vs Load Current 90 VIN=2.7V 80 VIN =3.0V 70 100 Quiescent Current vs Temperature (No Load) Quiescen t Current (uA) 80 Efficiency (%) 60 50 40 30 20 10 0 0 1 For V OUT=5V only V IN =5.0V IOUT=0mA 60 40 20 0 10 100 -40 -20 Load Current (mA) Temperature (oC) 25 55 85 9 AME, Inc. AME7720 / 7721 Output Ripple Voltage vs VIN IO=5mA COUT =2.2F 200 Step-Up/Step-Down 60mA Regulated Charge Pump Load Transient Response 50mA/div 250 Ripple (mVp-p) ILOAD 20m A/div 150 VOUT 100 AME7720BEEY 50 0 1.5 2 2.5 2.7 3 3.5 4 4.5 5 5.5 VIN (V) 10s/div Output Voltage vs Temperature 0.6 O utpu t Voltag e Ch an ge (%) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -40 -20 0 20 40 60 80 100 120 140 Junction Temperature (oC) Input Current at Turn-On 120mA/div II N VOUT 2V/div VIN=3V,IOUT=60mA BW=20MHz 2ms/div 10 AME, Inc. AME7720 / 7721 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 Step-Up/Step-Down 60mA Regulated Charge Pump n Tape & Reel Dimension SOT-26 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 11 AME, Inc. AME7720 / 7721 n Tape & Reel Dimension TSOT-26 P Step-Up/Step-Down 60mA Regulated Charge Pump W AME PIN 1 AME Package TSOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm SOT-25 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 12 AME, Inc. AME7720 / 7721 n Tape and Reel Dimension TSOT-25 P Step-Up/Step-Down 60mA Regulated Charge Pump W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package TSOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 13 AME, Inc. AME7720 / 7721 n Package Dimension SOT-25 Top View D Side View Step-Up/Step-Down 60mA Regulated Charge Pump SYMBOLS A A1 H E L MILLIMETERS MIN MAX INCHES MIN MAX 1.20REF 0.00 0.30 2.70 1.40 0.15 0.55 3.10 1.80 0.0472REF 0.0000 0.0118 0.1063 0.0551 0.0059 0.0217 0.1220 0.0709 b D E S1 e c1 e H L 1.90 BSC 2.60 3.00 0.07480 BSC 0.10236 0.11811 0.0146BSC 0o 10o 0.37BSC 0o 10o Front View A ?1 S1 0.95BSC 0.0374BSC b SOT-26 Top View D e Side View A1 SYMBOLS L MILLIMETERS MIN MAX INCHES MIN MAX A A1 b D c1 S1 H E 1.20REF 0.00 0.30 2.70 1.40 0.15 0.55 3.10 1.80 0.0472REF 0.0000 0.0118 0.1063 0.0551 0.0059 0.0217 0.1220 0.0709 E e H L ?1 1.90 BSC 2.60 3.00 0.0748 BSC 0.10236 0.11811 0.0146REF 0o 10o Front View A 0.37REF 0o 10o S1 b A1 0.95REF 0.0374REF 14 AME, Inc. AME7720 / 7721 n Package Dimension TSOT-25 Top View D L Side View Step-Up/Step-Down 60mA Regulated Charge Pump SYMBOLS A+A1 MILLIMETERS MIN 1.00 0.30 2.70 1.40 INCHES MIN 0.0394 0.0118 0.1063 0.0551 MAX 1.30 0.55 3.10 1.80 MAX 0.0512 0.0217 0.1220 0.0709 H E b D E S1 e c1 e H L 1.90 BSC 2.60 3.00 0.07480 BSC 0.10236 0.11811 0.0146BSC o 0.37BSC 0 o Front View A ?1 S1 10 0o 10o 0.95BSC 0.0374BSC b TSOT-26 Top View D e Side View A1 SYMBOLS A+A1 MILLIMETERS MIN 1.00 0.30 2.70 1.40 INCHES MIN 0.0394 0.0118 0.1063 0.0551 L MAX 1.30 0.55 3.10 1.80 MAX 0.0512 0.0217 0.1220 0.0709 H E b D c1 S1 E e H L 1.90 BSC 2.60 3.00 0.0748 BSC 0.10236 0.11811 0.0146REF 0o 10o 0.37REF 0o 10o Front View ?1 A S1 0.95REF 0.0374REF b A1 15 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. (c) AME, Inc. , March 2006 Document: 1121-DS7720/7721-A.02 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. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489 |
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