AME, Inc. 100mA Regulated Charge Pump AME7730 n General Description The AME7730 is a charge pump voltage doublers that delivers a regulated output. No external inductor is required for operation. Using three small capacitors, the AME7730 can deliver up to 100mA to the voltage regulated output. The AME7730 features very low output ripple 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. n Functional Block Diagram C- VIN C+ φ2 φ1 φ1 φ2 VOUT φ1 φ2 EN EA Control The AME7730 contains a thermal management circuit to protect the device under continuous output short circuit conditions. The AME7730 is available in SOT-26 / TSOT-26 package and is rated from -40OC to 85OC. n Features n Typical Application l Input Voltage Range: 2.7V to 5V l Accurate to with ±4% l Output Current: 100mA with VIN >= 3.0V 50mA with VIN >= 2.7V l GND 1MHz Switching Frequency l Shutdown Mode < 1µA l Short Circuit Protection l Over Temperature Protection l All AME's Lead Free Product Meet RoHS Standards VOUT C+ CFLY = 1µF 3.0V to 5V VIN CIN=10µF 5V / 100mA VOUT COUT=10µF VIN C- AME 7730 GND EN ON OFF n Applications l Cellular Phones l Digital Cameras l PDAs LCD displays l LED / Display Back Light Driver l LEDs for Comera Flash Rev.A.01 1 AME, Inc. 100mA Regulated Charg Pump AME7730 n Pin Configuration SOT-26 / TSOT-26 Front View 6 5 AME7730AEEY 4 1. OUT AME7730 2. GND 3. EN 4. C- 1 2 3 5. IN 6. C+ * Die Attach: Conductive Epoxy n Pin Description 2 Pin Number Pin Name Description 1 OUT Regulator Output Pin. VOUT should be bypassed with a 10µF low ESR ceramic capacitor 2 GND Ground Pin Connection 3 EN Enable Input. Active Low disable the regulator 4 C- Pump Capacitor Negative Terminal 5 IN Input Supply Pin. VIN should be bypassed with a 10µF low ESR ceramic capacitor 6 C+ Pump Capacitor Positive Terminal Rev.A.01 AME, Inc. 100mA Regulated Charge Pump AME7730 n Ordering Information AME7730 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration A (SOT-26) (TSOT-26) Operating Ambient Temperature Range Package Type E: -40OC to 85OC E: SOT-2X 1. OUT 2. GND 3. EN 4. C5. IN 6. C+ Number of Pins Y: 6 Output Voltage 500: V = 5V Special Feature Z: Lead free Y: Lead free & Low profile n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME7730AEEY500Y BCAww 5V TSOT-26 - 40oC to 85oC AME7730AEEY500Z BCAww 5V SOT-26 - 40oC to 85oC Note: ww represents date code and pls refer Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as BCA Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. Rev.A.01 3 AME, Inc. 100mA Regulated Charg Pump AME7730 n Absolute Maximum Ratings Parameter Maximum Input Voltage, Output Voltage, C-, C+ Unit -0.3 to 5.5 V EN -0.3 to VIN + 0.3 B* ESD Classification Note : Caution: Stress above the listed in absolute maximum ratings may cause permanent damage to the device. * HBM B: 2000V ~ 3999V n Recommended Operating Conditions Parameter Symbol Rating Unit Ambient Temperature Range TA - 40 to 85 o C Junction Temperature Range TJ - 40 to 125 o C Storage Temperature Range TSTG - 65 to 150 o C n Thermal Information Parameter Package Die Attach Thermal Resistance* (Junction to Case) Symbol Maximum θJC 81 Unit o C/W Thermal Resistance (Junction to Ambient) SOT-26 TSOT-26 Conductive Epoxy Internal Power Dissipation Solder Iron (10 Sec)** θJA 260 PD 400 350 mW o C * Measure θJC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F 4 Rev.A.01 AME, Inc. 100mA Regulated Charge Pump AME7730 n Electrical Characteristics VIN = VEN = 3V, Cpump = 1µF, CIN = 10µF, COUT = 10µF, Typical values are at TA = 25oC, unless otherwise noted. Parameter Input Voltage Output Voltage Symbol Test Conditions Min Typ VIN VOUT = 5.0V 2.7 IOUT <= 50mA, 2.7V < VIN < 5V 4.8 5 5.2 IOUT <= 100mA, 3.0V < VIN < 5V 4.8 5 5.2 2.7V < VIN < 5V, IOUT = 0mA, VEN = VIN 60 100 2.7V < VIN < 3.6V, IOUT = 0mA, VEN = 0 0.01 1 IQ Shutdown Current ISHDN 5 V V ISC µA µA 3.6V < VIN < 5V, IOUT = 0mA, VEN = 0 Ripple Voltage1 Units VOUT Quiescent Current Short Circuit Current Limit Max 2.5 VIN = VEN = 3V, VOUT = GND 300 VIN = 2.7V, IOUT = 50mA, VOUT = 5V 25 VIN = 3V, IOUT = 100mA, VOUT = 5V 30 mA VRIPPLE mVp-p Efficiency η VIN = 2.7V, IOUT = 50mA, VOUT = 5V 90 % Frequency fOSC Oscillator Free Running 1.0 MHz EN Input Threshold High VEH EN Input Threshold Low VEL EN Input Current IEN 1.3 V VEN = VIN, VEN = GND 0.6 V 0.1 µA Over Temperature Shutdown OTS 160 o Over Temperature Hysterisis OTH 20 o C C Note 1: Effective series resistance (ESR) of capacitors is < 0.1Ω. Rev.A.01 5 AME, Inc. AME7730 100mA Regulated Charg Pump n Detailed Description n Capacitor Selection The AME7730 uses charge pump voltage doubler structure to boost an input voltage to a regulated output voltage. Regulation is achieved by decting the charge pump output voltage through an internal resistor divider network. A charge pump circuit is enabled when the divided output voltage below a preset trip point controlled by an internal comparator. For minimum output voltage ripple, the output capacitor C OUT 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 respectively) should also be surface-mount ceramic types. In all cases, X7R or X5R dielectric are recommended. n Short Circuit and Thermal Protection The AME7730 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 AME7730 to operate indefinitely a short circuit condition with out damage to the device. With ligh 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. n Efficiency The efficiency of the charge pump regulator depends on the applied input voltage, the load current, and the internal operation mode of the device. The approximate efficiency is given by: Efficiency (%) = VOUT / 2VIN． 100 % n Shutdown Mode A control pin EN 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 V IN and input quiescent current is reduced to 1µA maximum. n Layout Large ripple currents flow in the VIN and VOUT traces. To minimize 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. 6 Rev.A.01 AME, Inc. 100mA Regulated Charge Pump AME7730 Output Voltage vs. Output Current Supply Current vs. Supply Voltage 5.2 60 VIN = 3.6V VIN = 3.3V 4.8 Supply Current (µA) Output Voltage (V) 5.0 4.6 4.4 4.2 VIN = 3.0V 4.0 3.8 VIN = 2.7V 3.6 58 IOUT = 0µA VEN = VIN 56 CFLY = 1µF 54 52 50 48 3.4 3.2 0 50 100 46 2.5 150 Output Current (mA) 4 4.5 5 5.5 Efficiency vs. Load Current 100 95 ILoad = 25mA 90 85 90 ILoad = 50mA 80 ILoad = 100mA 70 65 60 70 40 30 50 10 3.5 4 4.5 0 0.01 5 VIN = 3.6V 50 20 3 VIN = 3.3V 60 55 45 2.5 VIN = 2.7V VIN = 3.0V 80 Efficiency (%) Efficiency (%) 3.5 Supply Voltage (V) Efficiency vs. Supply Voltage 75 3 0.1 1 10 100 Supply Voltage (V) Load Current (mA) Oscillator Frequency vs. Supply Voltage Output Voltage vs. Input Voltage 1000 5.2 TA = 20oC Output Voltage (V) Frequency (KHz) 1600 1400 TA = 85oC 1200 TA = 25oC 1000 800 TA = -40oC 4.8 TA = -20oC 4.4 4.0 TA = 55oC 3.6 600 400 2.5 IOUT = 200mA 3.2 3.2 2.7 3 3.5 4 Supply Voltage (V) Rev.A.01 One Shot Pulse t = 100msec 4.5 5 3.4 3.6 3.8 4.0 4.2 Input Voltage (V) 7 AME, Inc. 100mA Regulated Charg Pump AME7730 Startup Time Startup Time ILOAD = 100mA ILOAD = 50mA EN 2V / DIV EN 2V / DIV VOUT 1V / DIV VOUT 1V / DIV 100µS / DIV 100µS / DIV Load Transient Response Load Transient Response 0mA to 100mA 50mA / DIV IOUT 0mA to 50mA 20mA / DIV IOUT 20mV / DIV AC Coupled VOUT VOUT 20mV / DIV AC Coupled IOUT = 100mA VIN = 3.0V IOUT = 50mA VIN = 3.0V 50µS / DIV 50µS / DIV Output Ripple Output Ripple 10mV / DIV AC Coupled VOUT IOUT = 50mA VIN = 3.0V IOUT = 100mA VIN = 3.0V 2µS / DIV 8 10mV / DIV AC Coupled VOUT 2µS / DIV Rev.A.01 AME, Inc. 100mA Regulated Charge Pump AME7730 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 and Reel Dimension SOT-26 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev.A.01 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 9 AME, Inc. 100mA Regulated Charg Pump AME7730 n Tape and Reel Dimension TSOT-26 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 10 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 Rev.A.01 AME, Inc. 100mA Regulated Charge Pump AME7730 n Package Dimension SOT-26 Top View Side View SYMBOLS D e MILLIMETERS 1.20REF E A H MAX MIN MAX L MIN INCHES θ1 A1 0.00 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 1.90 BSC e S1 H 2.60 A θ1 0.0748 BSC 3.00 0.37REF L Front View 0.0472REF 0 o 10 0.10236 0.11811 0.0146REF o 0o 10 o 0.95REF 0.0374REF MILLIMETERS INCHES A1 S1 b TSOT-26 Top View Side View SYMBOLS MIN MAX MIN MAX A+A1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 L E H D e θ1 H S1 1.90 BSC e 2.40 θ1 A 0 o 10 0.95BSC 0.09449 0.11811 0.0138BSC o 0o 10 o 0.0374BSC A1 S1 3.00 0.35BSC L Front View 0.07480 BSC b Rev.A.01 11 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. , June 2007 Document: 1005-DS7730-A.01 Corporate Headquarter U.S.A.(Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Tel: 886 2 2627-8687 Santa Clara, CA. 95054-2438 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489