AME, Inc.
1
AME7720 / 7721
Step-Up/Step-Down
60mA Regulated Charge Pump
n
General Description
n
Features
n
Applications
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.
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 < 1
A (AME7720)
l
Short Circuit Protection:Typ. 80mA
l
Over Temperature Protection
l
All AME
'
s Lead Free Product Meet RoHS
Standards
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
AME7721
Control
EA
2
1
1
2
2
1
C-
C+
V
IN
V
OUT
GND
Control
EA
2
1
1
2
2
1
EN
C-
C+
V
IN
V
OUT
GND
AME, Inc.
2
Step-Up/Step-Down
60mA Regulated Charge Pump
AME7720 / 7721
n
Typical Application
AME7720
AME7721
AME
7721
V
OUT
C+
C-
GND
V
IN
C
IN
=2.2
F
C
OUT
=2.2
F
V
IN
V
OUT
C
PUMP
= 0.22
F
5V / 60mA
3.0V to 5.5V
AME
7720
V
OUT
C+
EN
C-
GND
V
IN
C
IN
=2.2
F
C
OUT
=2.2
F
ON OFF
V
IN
V
OUT
3.0V to 5.5V
5V / 60mA
C
PUMP
= 0.22
F
AME, Inc.
3
AME7720 / 7721
Step-Up/Step-Down
60mA Regulated Charge Pump
SOT-25
Top View
SOT-26
Top View
1
3
2
5
4
AME7721
n
Pin Configuration
1
3
2
6
4
5
AME7720
AME7720BEEY
1. V
OUT
2. GND
3. C-
4. V
IN
5. C+
6. EN
* Die Attach:
Conductive Epoxy
n
Pin Description
* Die Attach:
Conductive Epoxy
AME7721BEEV
1. V
OUT
2. GND
3. C-
4. V
IN
5. C+
AME7720
AME7721
1
1
V
OUT
Regulator output pin.
V
OUT
should be bypassed with a 2.2
F low ESR ceramic capacitor.
2
2
GND
Ground pin connection.
3
3
C-
Pump capacitor negative terminal.
4
4
V
IN
Input supply pin.
V
IN
should be bypassed with a 2.2
F low ESR ceramic capacitor.
5
5
C+
Pump capacitor positive terminal.
6
N/A
EN
Shutdown input.
Active Low disable the regulator.
Pin Number
Pin Name
Pin Description
AME, Inc.
4
Step-Up/Step-Down
60mA Regulated Charge Pump
AME7720 / 7721
E: -40
O
C to 85
O
C
E: SOT-2X
V: 5
500: V=5V
Y: Lead free & Low profile
B
1. V
OUT
(SOT-26)
2. GND
3. C-
4. V
IN
5. C+
6. EN
B
1. V
OUT
(SOT-25)
2. GND
3. C-
4. V
IN
5. C+
Y: 6
Lead free
AME7721
AME7720
Pin
Configuration
Special Feature
Operating Ambient
Temperature Range
Package
Type
Number of
Pins
Voltage
Z:
n
Ordering Information
Operating Ambient Temperature Range
Number of Pins
Package Type
Pin Configuration
Special Feature
AME7720/7721 x x x
x
xxx
x
Voltage
n
Ordering Information
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.
Part Number
Marking*
Output Voltage
Package
Operating Ambient
Temperature Range
AME7720BEEY500Z
BECww
5V
SOT-26
- 40
o
C to + 85
o
C
AME7720BEEY500Y
BECww
5V
TSOT-26
- 40
o
C to + 85
o
C
AME7721BEEV500Z
BEGww
5V
SOT-25
- 40
o
C to + 85
o
C
AME7721BEEV500Y
BEGww
5V
TSOT-25
- 40
o
C to + 85
o
C
AME, Inc.
5
AME7720 / 7721
Step-Up/Step-Down
60mA Regulated Charge Pump
n
Absolute Maximum Ratings
n
Recommended Operating Conditions
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
* HBM C:4000V+
n
Thermal Information
* Measure
JC
on center of molding compound if IC has no tab.
**
MIL-STD-202G 210F
Parameter
Symbol
Rating
Unit
Ambient Temperature Range
T
A
- 40 to + 85
o
C
Junction Temperature Range
T
J
- 40 to + 125
o
C
Parameter
Maximum
Unit
Input Voltage
5.5
V
ESD Classification
C*
Parameter
Package
Die Attach
Symbol
Maximum
Unit
SOT-26
Conductive Epoxy
SOT-25
Conductive Epoxy
SOT-26
Conductive Epoxy
SOT-25
Conductive Epoxy
SOT-26
Conductive Epoxy
SOT-25
Conductive Epoxy
150
350
260
400
Thermal Resistance*
(Junction to Case)
Thermal Resistance
(Junction to Ambient)
Internal Power Dissipation
o
C/W
mW
P
D
JA
JC
81
Maximum Junction Temperature
Solder Iron (10Sec)**
o
C
PDF 
ZIP