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AME, Inc.
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. 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.
100mA Regulated Charge Pump
n Functional Block Diagram
VIN 2 CC+
1
1
2 VOUT 1 2 EA
EN Control
GND
n Features
l l l l l l l l Input Voltage Range: 2.7V to 5V Accurate to with 4% Output Current: 100mA with VIN >= 3.0V 50mA with VIN >= 2.7V 1MHz Switching Frequency Shutdown Mode < 1A Short Circuit Protection Over Temperature Protection All AME's Lead Free Product Meet RoHS Standards
n Typical Application
C+ CFLY = 1F 3.0V to 5V VIN VIN
VOUT
5V / 100mA VOUT COUT=10F
AME 7730
GND
CIN=10F
C-
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.
AME7730
n Pin Configuration
SOT-26 / TSOT-26 Front View
6 5 4
100mA Regulated Charg Pump
AME7730AEEY 1. OUT 2. GND 3. EN 4. C5. IN 6. C+ * Die Attach: Conductive Epoxy
AME7730
1 2 3
n Pin Description
Pin Number
1 2 3 4 5 6
Pin Name
OUT GND EN CIN C+
Description
Regulator Output Pin. VOUT should be bypassed with a 10F low ESR ceramic capacitor Ground Pin Connection Enable Input. Active Low disable the regulator Pump Capacitor Negative Terminal Input Supply Pin. VIN should be bypassed with a 10F low ESR ceramic capacitor Pump Capacitor Positive Terminal
2
Rev.A.01
AME, Inc.
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
Number of Pins Y: 6
100mA Regulated Charge Pump
Pin Configuration
Operating Ambient Temperature Range
Package Type
Output Voltage
Special Feature
A
(SOT-26) (TSOT-26)
1. OUT 2. GND 3. EN 4. C5. IN 6. C+
E: -40OC to 85OC
E: SOT-2X
500: V = 5V
Z: Lead free Y: Lead free & Low profile
n Ordering Information
Part Number
AME7730AEEY500Y AME7730AEEY500Z
Marking*
BCAww BCAww
Output Voltage
5V 5V
Package
TSOT-26 SOT-26
Operating Ambient Temperature Range
- 40oC to 85oC - 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.
AME7730
n Absolute Maximum Ratings
Parameter
Input Voltage, Output Voltage, C-, C+ EN ESD Classification
100mA Regulated Charg Pump
Maximum
-0.3 to 5.5
Unit
V
-0.3 to VIN + 0.3 B*
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
Ambient Temperature Range Junction Temperature Range Storage Temperature Range
Symbol
TA TJ TSTG
Rating
- 40 to 85 - 40 to 125 - 65 to 150
Unit
o
C C C
o
o
n Thermal Information
Parameter
Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10 Sec)** SOT-26 TSOT-26 Conductive Epoxy
Package
Die Attach
Symbol
JC JA
Maximum
81
Unit
o
C/W
260
PD
400 350
mW
o
C
* Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F
4
Rev.A.01
AME, Inc.
AME7730
n Electrical Characteristics
VIN = VEN = 3V, Cpump = 1F, CIN = 10F, COUT = 10F, Typical values are at TA = 25oC, unless otherwise noted.
Parameter Input Voltage Symbol VIN Test Conditions VOUT = 5.0V IOUT <= 50mA, 2.7V < VIN < 5V Output Voltage VOUT IOUT <= 100mA, 3.0V < VIN < 5V Quiescent Current IQ 2.7V < VIN < 5V, IOUT = 0mA, VEN = VIN 2.7V < VIN < 3.6V, IOUT = 0mA, VEN = 0 Shutdown Current ISHDN 3.6V < VIN < 5V, IOUT = 0mA, VEN = 0 Short Circuit Current Limit ISC VIN = VEN = 3V, VOUT = GND VIN = 2.7V, IOUT = 50mA, VOUT = 5V Ripple Voltage1 VRIPPLE VIN = 3V, IOUT = 100mA, VOUT = 5V Efficiency Frequency EN Input Threshold High EN Input Threshold Low EN Input Current Over Temperature Shutdown Over Temperature Hysterisis fOSC VEH VEL IEN OTS OTH VEN = VIN, VEN = GND 160 20 VIN = 2.7V, IOUT = 50mA, VOUT = 5V Oscillator Free Running 1.3 0.6 0.1 30 90 1.0 % MHz V V A
o
100mA Regulated Charge Pump
Min 2.7 4.8 4.8
Typ
Max 5
Units V
5 5 60 0.01
5.2 V 5.2 100 1 A 2.5 A
300 25
mA
mVp-p
C C
o
Note 1: Effective series resistance (ESR) of capacitors is < 0.1.
Rev.A.01
5
AME, Inc.
AME7730
n Detailed Description
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.
100mA Regulated Charg Pump
n Capacitor Selection
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. With ligh loads or higher input voltage, a smaller 0.1F pump capacitor (CPUMP) and smaller 1F input and output capacitor (CIN and COUT respectively) can be used. To minimize output voltage ripple, increase the output capacitor COUT to 10F or larger.
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.
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 / 2VIND 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 1A 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.
AME7730
Output Voltage vs. Output Current
5.2 5.0
60
100mA Regulated Charge Pump
Supply Current vs. Supply Voltage
Supply Current (A)
Output Voltage (V)
4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 0
VIN = 3.3V
VIN = 3.6V
58 56 54 52 50 48 46 2.5
IOUT = 0A VEN = VIN CFLY = 1F
VIN = 3.0V
VIN = 2.7V
50
100
150
Output Current (mA)
3
3.5
4
4.5
5
5.5
Supply Voltage (V)
Efficiency vs. Supply Voltage
95 90 85
100
Efficiency vs. Load Current
ILoad = 25mA
90 80
VIN = 3.0V
VIN = 2.7V
Efficiency (%)
ILoad = 50mA ILoad = 100mA
Efficiency (%)
80 75 70 65 60 55 50 45 2.5
70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 1000
VIN = 3.3V
VIN = 3.6V
3
3.5
4
4.5
5
Supply Voltage (V)
Load Current (mA)
Oscillator Frequency vs. Supply Voltage
5.2
Output Voltage vs. Input Voltage
1600
TA = 20oC
Frequency (KHz)
1400
TA = 85oC
1200
Output Voltage (V)
4.8
TA = -20oC
4.4
1000
TA = 25oC
4.0
TA = 55oC
3.6
One Shot Pulse t = 100msec
800
TA = -40oC
600
IOUT = 200mA
3.2 3.2 3.4 3.6 3.8 4.0 4.2
400 2.5
2.7
3
3.5
4
4.5
5
Supply Voltage (V)
Input Voltage (V)
Rev.A.01
7
AME, Inc.
AME7730
Startup Time
ILOAD = 50mA
100mA Regulated Charg Pump
Startup Time
ILOAD = 100mA
EN
2V / DIV
EN
2V / DIV
VOUT 100S / DIV
1V / DIV
VOUT 100S / DIV
1V / DIV
Load Transient Response
Load Transient Response
IOUT
0mA to 50mA 20mA / DIV
0mA to 100mA 50mA / DIV
IOUT
VOUT
20mV / DIV AC Coupled
VOUT
IOUT = 50mA VIN = 3.0V
20mV / DIV AC Coupled
IOUT = 100mA VIN = 3.0V
50S / DIV
50S / DIV
Output Ripple
Output Ripple
VOUT
10mV / DIV AC Coupled
VOUT
10mV / DIV AC Coupled
IOUT = 50mA VIN = 3.0V
IOUT = 100mA VIN = 3.0V
2S / DIV
2S / DIV
8
Rev.A.01
AME, Inc.
AME7730
n Date Code Rule
Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9
100mA Regulated Charge Pump
n Tape and Reel Dimension
SOT-26
P
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package SOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
Rev.A.01
9
AME, Inc.
AME7730
n Tape and Reel Dimension
TSOT-26
P
100mA Regulated Charg Pump
W AME PIN 1 AME
Carrier Tape, Number of Components Per Reel and Reel Size
Package TSOT-26 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm
10
Rev.A.01
AME, Inc.
AME7730
n Package Dimension
SOT-26
100mA Regulated Charge Pump
Top View D e
Side View
SYMBOLS
L
MILLIMETERS MIN MAX
0.15 0.55 3.10 1.80
INCHES MIN
0.0000 0.0118 0.1063 0.0551
MAX
0.0059 0.0217 0.1220 0.0709
A A1
H E
1.20REF 0.00 0.30 2.70 1.40
0.0472REF
b D
c1 S1
E e H L 1
1.90 BSC 2.60 3.00
0.0748 BSC 0.10236 0.11811 0.0146REF
o
0.37REF 0
o
Front View A
10
0o
10 o
S1
0.95REF
0.0374REF
b
TSOT-26
Top View D e Side View
A1
SYMBOLS
L
MILLIMETERS MIN MAX
1.25 0.50 3.10 1.80
INCHES MIN
0.0354 0.0118 0.1063 0.0551
MAX
0.0492 0.0197 0.1220 0.0709
A+A1 b
H E
0.90 0.30 2.70 1.40
D E
c1 S1
e H L 1
1.90 BSC 2.40 3.00
0.07480 BSC 0.09449 0.11811 0.0138BSC
o
0.35BSC 0
o
Front View A
10
0o
10 o
S1
0.95BSC
0.0374BSC
b
Rev.A.01
A1
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. (c) AME, Inc. , June 2007 Document: 1005-DS7730-A.01
Corporate Headquarter
AME, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989
U.S.A.(Subsidiary)
Analog Microelectronics, Inc.
3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2438 Tel : (408) 988-2388 Fax: (408) 988-2489

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