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. 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 C- VIN C+ The AME7720 / 7721 is available in SOT-25 / SOT-26 package and is rated from -40OC to 85OC. φ2 φ1 n Features φ1 φ2 VOUT l Input Voltage Range: 5V Version: 2.7V to 5.5V φ1 φ2 EN EA Control 3.3V Version: 1.8V to 5.5V l Accurate to with ±5% l Output Current: 5V Version: 60mA with VIN>=3.0V GND 3.3V Version: 60mA with VIN >=2.2V AME7721 l 1MHZ Switching Frequency l Shutdown Mode < 1µA (AME7720) l Short Circuit Protection:Typ. 80mA l Over Temperature Protection C- VIN C+ φ2 φ1 φ1 φ2 l All AME’ s Lead Free Product Meet RoHS Standards V OUT φ1 φ2 Control EA GND 1 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Typical Application AME7720 VOUT C+ CPUMP = 0.22µF 3.0V to 5.5V VIN C IN=2.2µF VIN AME 7720 5V / 60mA VOUT C OUT =2.2µF GND C- EN ON OFF AME7721 C+ VOUT CPUMP = 0.22µF 3.0V to 5.5V VIN VIN CC IN=2.2µF 2 AME 7721 5V / 60mA VOUT C OUT =2.2µF GND AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Pin Configuration SOT-26 Top View 6 5 SOT-25 Top View 4 AME7720 AME7720BEEY 5 4 1. VOUT 1. VOUT 2. GND 2. GND AME7721 3. C4. VIN 2 3 3. C4. VIN 5. C+ 1 AME7721BEEV 5. C+ 1 6. EN 2 3 * Die Attach: * Die Attach: Conductive Epoxy Conductive Epoxy n Pin Description Pin Number Pin Name Pin Description 1 VOUT Regulator output pin. VOUT should be bypassed with a 2.2µF low ESR ceramic capacitor. 2 2 GND Ground pin connection. 3 3 C- Pump capacitor negative terminal. 4 4 VIN Input supply pin. VIN should be bypassed with a 2.2µF low ESR ceramic capacitor. 5 5 C+ Pump capacitor positive terminal. 6 N/A EN Shutdown input. Active Low disable the regulator. AME7720 AME7721 1 3 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump 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 B (SOT-26) Operating Ambient Temperature Range Package Type Number of Pins E: -40OC to 85OC E: SOT-2X V: 5 Y: 6 1. VOUT 2. GND 3. C4. VIN 5. C+ 6. EN Voltage 500: V=5V Special Feature Y: Lead free & Low profile Z: Lead free AME7721 B (SOT-25) 1. VOUT 2. GND 3. C4. VIN 5. C+ n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME7720BEEY500Z BECww 5V SOT-26 - 40oC to + 85oC AME7720BEEY500Y BECww 5V TSOT-26 - 40oC to + 85oC AME7721BEEV500Z BEGww 5V SOT-25 - 40oC to + 85oC AME7721BEEV500Y BEGww 5V TSOT-25 - 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. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Absolute Maximum Ratings Parameter Maximum Unit Input Voltage 5.5 V ESD Classification C* Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM C:4000V+ n Recommended Operating Conditions Parameter Symbol Rating Unit Ambient Temperature Range TA - 40 to + 85 o Junction Temperature Range TJ - 40 to + 125 o C C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Package Die Attach SOT-26 Conductive Epoxy SOT-25 Conductive Epoxy Symbol Maximum θJC 81 Unit o C/W Thermal Resistance (Junction to Ambient) SOT-26 Conductive Epoxy SOT-25 Conductive Epoxy SOT-26 Conductive Epoxy SOT-25 Conductive Epoxy Internal Power Dissipation θJA 260 PD 400 Maximum Junction Temperature 150 Solder Iron (10Sec)** 350 mW o C * Measure θJC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F 5 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Electrical Specifications(AME7720) TA=-40OC to +85OC, VIN = VOUT/2+0.75V, IOUT = 5mA , CIN = COUT=2.2µF , CPUMP = 0.22 µF, V EN =1.3V Typical Values are at TA=25OC. Parameter Input Voltage Symbol VIN Test Conditions Min VOUT = 5V 2.7 5.5 VOUT = 3.3V 1.8 5.5 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 4.75 Quiescent Current IQ 1.8V < VIN < 5.5V, EN = GND IOUT VOUT = 5V Short Circuit Current Limit ISC VOUT = GND VRIPPLE 3.14 Efficiency η Frequency fOSC EN Input Threshold High VIH EN Input Threshold Low VIL EN Input Current High IIH EN Input Current Low IIL VOUT Turn-on time tON VIN = 2.7V V 3.46 60 100 µA 0.01 0.1 60 TA=25oC Oscillator Free Running mA 80 mA 50 mVp-p 90 % 1.0 MHz 1.3 V 0.6 V EN = VIN 0.1 µA EN = GND 0.1 µA VIN = 3V, IOUT = 60mA TA=25oC 0.15 Over Temperature Shutdown OTS 160 Over Temperature Hysterisis OTH 20 Note 1: Effective series resistance (ESR) of capacitors is < 0.1Ω. 6 3.3 o VIN = 3V, IOUT = 60mA IOUT = 15mA, Units 5.25 TA=-40~+85 C Output Current Ripple Voltage1 5 Max V 1.8V < VIN < 5.5V, IOUT = 0mA Typ ms o C AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Electrical Specifications(AME7721) TA=-40OC to +85OC, VIN = VOUT/2+0.75V, IOUT = 5mA CIN = 2.2µF , CPUMP = 0.22 µF Typical Values are at TA=25OC Parameter Input Voltage Symbol VIN Test Conditions Min VOUT = 5V 2.7 5.5 VOUT = 3.3V 1.8 5.5 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 IQ 1.8V < VIN < 5V, IOUT=0mA IOUT VOUT = 5V Short Circuit Current Limit ISC VOUT = GND VRIPPLE Efficiency η Frequency fOSC VOUT Turn-on time tON VIN = 2.7V TA=25oC Oscillator Free Running VIN = 3V, IOUT = 60mA 3.14 TA=25oC Units V 5.25 3.3 3.46 60 100 60 VIN = 3V, IOUT = 60mA IOUT = 15mA, 5 Max V TA=-40~+85oC Output Current Ripple Voltage1 4.75 Typ µA mA 80 mA 50 mVp-p 90 % 1.0 MHz 0.15 ms Over Temperature Shutdown OTS 160 Over Temperature Hysterisis OTH 20 o C Note 1: Effective series resistance (ESR) of capacitors is < 0.1Ω. 7 AME, Inc. AME7720 / 7721 Step-Up/Step-Down 60mA Regulated Charge Pump n Detailed Description n Efficiency 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. 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. 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 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 1µA 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 0.1µF pump capacitor (CPUMP) and smaller 1µF input and output capacitor (CIN and COUT, respectively) can be used. To minimize output voltage ripple, increase the output capacitor, COUT, to 10µF or larger. 8 The approximate efficiency is given by: 5V Version (V IN<= VOUT) Efficiency (%) = VOUT / 2V IN ． 100 3.3V Version (V IN> VOUT) Efficiency (%) = VOUT / VIN ． 100 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. AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 Efficiency vs. VIN Short-Circuit Load Current vs VIN 90 225 80 200 70 L oad Curren t (mA) 250 Efficien cy (%) 100 V OUT=5V 60 50 40 30 175 150 125 100 75 20 50 10 25 0 1.5 0 2 2.5 2.7 3 3.5 4 4.5 5 5.5 2 2.5 3 3.5 4 4.5 5 5.5 VIN (V) VIN (V) Shutdown Supply Current vs Temperature Maximum Load Current vs Input Voltage 120 20 18 Maximum L oad Current (mA) Shutdown Supply Current (nA) 1.5 EN=Low 16 14 12 10 8 6 4 2 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 110 TA <=85 oC 100 90 80 70 60 50 40 30 20 10 0 1.5 90 2 2.5 2.7 3 3.5 3.6 4 4.5 5 5.5 VI N (V) o Temperature ( C) Efficiency vs Load Current Quiescent Current vs Temperature (No Load) 90 100 VIN=2.7V Quiescen t Current (uA) 80 VIN =3.0V Efficiency (%) 70 60 50 V IN =5.0V 40 30 20 10 80 IOUT=0mA 60 40 20 For V OUT=5V only 0 0 0 1 10 Load Current (mA) 100 -40 -20 25 Temperature (oC) 55 85 9 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 Load Transient Response Output Ripple Voltage vs VIN 50mA/div 250 IO=5mA COUT =2.2µF 150 ILOAD 20m A/div Ripple (mVp-p) 200 100 VOUT AME7720BEEY 50 0 1.5 2 2.5 2.7 3 3.5 4 4.5 5 5.5 10µs/div VIN (V) Output Voltage vs Temperature O utpu t Voltag e Ch an ge (%) 0.6 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) 120mA/div Input Current at Turn-On II N 2V/div VOUT VIN=3V,IOUT=60mA BW=20MHz 2ms/div 10 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Date Code Rule Marking Date Code Year A A A W W xxx0 A A A W W xxx1 A A A W W xxx2 A A A W W xxx3 A A A W W xxx4 A A A W W xxx5 A A A W W xxx6 A A A W W xxx7 A A A W W xxx8 A A A W W xxx9 n Tape & Reel Dimension SOT-26 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-26 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 11 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Tape & Reel Dimension TSOT-26 P W AME AME PIN 1 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT-26 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm SOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 12 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 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Tape and Reel Dimension TSOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 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 13 AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Package Dimension SOT-25 Top View Side View SYMBOLS MIN D L A E H MILLIMETERS 0.0472REF 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 L ?1 Front View MAX 0.00 H e 1.20REF MIN A1 e θ1 S1 MAX INCHES 2.60 3.00 0.37BSC 0o 10o 0.07480 BSC 0.10236 0.11811 0.0146BSC 0o 10o 0.95BSC 0.0374BSC MILLIMETERS INCHES A1 A S1 1.90 BSC b SOT-26 Top View Side View SYMBOLS MIN L D e E H A θ1 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 L A A1 S1 14 0.0472REF 0.15 ?1 b MAX 0.00 H Front View 1.20REF MIN A1 e S1 MAX 1.90 BSC 2.60 3.00 0.37REF 0o 10o 0.95REF 0.0748 BSC 0.10236 0.11811 0.0146REF 0o 10o 0.0374REF AME, Inc. Step-Up/Step-Down 60mA Regulated Charge Pump AME7720 / 7721 n Package Dimension TSOT-25 Top View Side View D SYMBOLS MAX MIN MAX A+A1 1.00 1.30 0.0394 0.0512 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 1.90 BSC e H e 2.60 ?1 3.00 0 o 10 0.10236 0.11811 0.0146BSC o 0o 10o 0.95BSC 0.0374BSC MILLIMETERS INCHES A1 A S1 0.07480 BSC 0.37BSC L Front View INCHES MIN L H E θ1 S1 MILLIMETERS b TSOT-26 Top View Side View L E θ1 SYMBOLS MIN MAX MIN MAX A+A1 1.00 1.30 0.0394 0.0512 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 S1 H L Front View A ?1 S1 1.90 BSC 2.60 3.00 0.37REF 0o 10o 0.95REF 0.0748 BSC 0.10236 0.11811 0.0146REF 0o 10o 0.0374REF A1 H D e b 15 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 2006 Document: 1121-DS7720/7721-A.02 Corporate Headquarter U.S.A. (Subsidiary) AME, Inc. Analog Microelectronics, 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 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489