AME AME7730

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: sales@ame.com.tw
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