AME, Inc.
AME7720 / 7721
n
General Description
The AME7720 / 7721 is switched-capactitor voltage
doublers that delivers a regulated output. No external in-
ductor is required for operation. Using three small ca-
pacitors, the AME7720 / 7721 can deliver up to 60mA to
the voltage regulated output. The AME7720 / 7721 fea-
tures 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 combi-
nation 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 -40
O
C to 85
O
C.
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
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Functional Block Diagram
AME7720
V
IN
φ2
C-
C+
φ1
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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 V
IN
>=3.0V
3.3V Version: 60mA with V
IN
>=2.2V
l
1MH
Z
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
V
IN
EN
φ1
φ2
V
OUT
φ1
φ2
EA
Control
GND
AME7721
C-
C+
φ2
φ1
φ1
φ2
V
OUT
φ1
φ2
EA
Control
GND
1
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. V
OUT
2. GND
5
4
AME7721BEEV
1. V
OUT
2. GND
AME7720
3. C-
4. V
IN
5. C+
AME7721
3. C-
4. V
IN
5. C+
1
2
3
6. EN
* Die Attach:
Conductive Epoxy
1
2
3
* Die Attach:
Conductive Epoxy
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Pin Description
Pin Number
AME7720
1
AME7721
1
V
OUT
Regulator output pin.
V
OUT
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.
V
IN
should be bypassed with a 2.2µF low ESR ceramic capacitor.
Pump capacitor positive terminal.
Shutdown input.
Active Low disable the regulator.
4
4
V
IN
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: -40
O
C to 85
O
C
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. V
OUT
2. GND
3. C-
4. V
IN
5. C+
6. EN
1. V
OUT
2. GND
3. C-
4. V
IN
5. C+
AME7721
B
(SOT-25)
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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
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
- 40
o
C to + 85
o
C
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
T
A
T
J
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
θ
JC
Maximum
81
Unit
Conductive Epoxy
o
C/W
Thermal Resistance
(Junction to Ambient)
Conductive Epoxy
θ
JA
Conductive Epoxy
Conductive Epoxy
P
D
400
mW
Conductive Epoxy
150
350
o
260
Internal Power Dissipation
SOT-25
Maximum Junction Temperature
Solder Iron (10Sec)**
* Measure
θ
JC
on center of molding compound if IC has no tab.
**
MIL-STD-202G 210F
C
5
Talking
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