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 φ2 CC+
φ1
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 < 1µA (AME7720) l Short Circuit Protection:Typ. 80mA l Over Temperature Protection l All AME’ s Lead Free Product Meet RoHS Standards
VIN EN
φ1
φ2 VOUT φ1 φ2 EA
Control
GND
AME7721
CC+
φ2
φ1
φ1
φ2 V OUT φ1 φ2 EA
Control
GND
1
AME, Inc.
AME7720 / 7721
n Typical Application
AME7720
5V / 60mA VOUT C OUT =2.2µF GND
Step-Up/Step-Down 60mA Regulated Charge Pump
C+ CPUMP = 0.22µF 3.0V to 5.5V VIN VIN
VOUT
AME 7720
C IN=2.2µF
C-
EN
ON OFF
AME7721
5V / 60mA VOUT C OUT =2.2µF GND
C+ CPUMP = 0.22µF 3.0V to 5.5V VIN VIN
VOUT
AME 7721
CC IN=2.2µF
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 2.2µF 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 2.2µF 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
θJC
Maximum
81
Unit
Conductive Epoxy
o
C/W
Thermal Resistance (Junction to Ambient)
Conductive Epoxy θJA 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 θJC 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=2.2µF , CPUMP = 0.22 µF, V EN =1.3V Typical Values are at TA=25OC. Parameter Input Voltage Symbol VIN Test Conditions VOUT = 5V VOUT = 3.3V IOUT
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