DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
General Description
Features
The AAT3111 ChargePump is a MicroPower switched
capacitor voltage converter that delivers a regulated
output. No external inductor is required for operation.
Using three small capacitors, the AAT3111 can deliver up
to 150mA to the voltage regulated output. The AAT3111
features very low quiescent current 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.
• Step-Up Type Voltage Converter
• Input Voltage Range:
▪ AAT3111-3.6: 1.8V to 3.6V
▪ AAT3111-3.3: 1.8V to 3.3V
• MicroPower Consumption: 20µA
• 3.6V, 3.3V Regulated ±4% Output
• 3.6V Output Current
▪ 100mA with VIN ≥ 3.0V
▪ 20mA with VIN ≥ 2.0V
• 3.3V Output Current
▪ 100mA with VIN ≥ 2.5V
▪ 20mA with VIN ≥ 1.8V
• High Frequency 750kHz Operation
• Shutdown Mode Draws Less Than 1µA
• Short-Circuit/Over-Temperature Protection
• 2kV ESD Rating
• SC70JW-8 or SOT23-6 Package
The AAT3111 operates in an output-regulated voltage
doubling mode. The regulator uses a pulse-skipping
technique to provide a regulated output from a varying
input supply. The AAT3111 contains a thermal management circuit to protect the device under continuous output short-circuit conditions.
The AAT3111 is available in a Pb-free, surface-mount
6-pin SOT23 or 8-pin SC70JW package and is rated over
the -40°C to +85°C temperature range.
Applications
• Battery Back-Up Supplies
• Digital Cameras
• Handheld Electronics
• MP3 Players
• PDAs
Typical Application
AAT3111
VOUT
VOUT
C+
GND
VIN
COUT
10uF
ON/OFF
SHDN
C-
1uF
VIN
CIN
10uF
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1
DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Pin Descriptions
Pin #
SOT23-6
SC70JW-8
Symbol
1
1
VOUT
2
3
4
5
6
2, 3, 4
5
6
7
8
GND
SHDN
CVIN
C+
Function
Regulated output pin. Bypass this pin to ground with at least 6.8µF low Equivalent
Series Resistance (ESR) capacitor.
Ground connection.
Shutdown input. Logic low signal disables the converter.
Flying capacitor negative terminal.
Input supply pin. Bypass this pin to ground with at least 6.8µF low ESR capacitor.
Flying capacitor positive terminal.
Pin Configuration
SOT23-6
(Top View)
VOUT
2
C+
1
6
GND
2
5
VIN
SHDN
3
4
C-
SC70JW-8
(Top View)
VOUT
GND
GND
GND
1
8
2
7
3
6
4
5
C+
VIN
CSHDN
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
VIN
VOUT
VSHDN
tSC
TJ
TLEAD
VESD
Description
VIN to GND
VOUT to GND
SHDN to GND
Output to GND Short-Circuit Duration
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec.)
ESD Rating2 — HBM
Value
Units
-0.3 to 6
-0.3 to 6
-0.3 to 6
Indefinite
-40 to 150
300
2000
V
V
V
s
°C
°C
V
Rating
Units
150
667
°C/W
mW
Thermal Information3
Symbol
QJA
PD
Description
Maximum Thermal Resistance
Maximum Power Dissipation
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Human body model is a 100pF capacitor discharged through a 1.5kW resistor into each pin.
3. Mounted on an FR4 board.
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Electrical Characteristics
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C, CFLY = 1µF, CIN = 10µF, COUT = 10µF.
Symbol
Description
AAT3111-3.3
VIN
Input Voltage
IQ
No Load Supply Current1
VOUT
Output Voltage
ISHDN
Shutdown Supply Current
VRIPPLE
Ripple Voltage
h
Efficiency
fOSC
Frequency
VIH
SHDN Input Threshold High
VIL
SHDN Input Threshold Low
IIH
SHDN Input Current High
IIL
SHDN Input Current Low
tON
VOUT Turn-On Time
ISC
Short-Circuit Current2
AAT3111-3.6
VIN
Input Voltage
IQ
No Load Supply Current1
VOUT
Output Voltage
ISHDN
Shutdown Supply Current
VRIPPLE
Ripple Voltage
h
fOSC
VIH
VIL
IIH
IIL
tON
ISC
Efficiency
Frequency
SHDN Input Threshold High
SHDN Input Threshold Low
SHDN Input Current High
SHDN Input Current Low
VOUT Turn-On Time
Short-Circuit Current2
Conditions
Min
VOUT = 3.3V
1.8V < VIN < 3.3V, IOUT = 0mA, SHDN = VIN
1.8V < VIN < 3.3V, IOUT = 20mA
2.5V < VIN < 3.3V, IOUT = 100mA
1.8V < VIN < 3.3V, IOUT = 0mA, VSHDN = 0
VIN = 2.0V, IOUT = 50mA
VIN = 1.8V, IOUT = 25mA
Oscillator Free Running
Typ
1.8
3.17
3.17
20
3.30
3.30
0.01
20
91
750
Max
Units
VOUT
30
3.43
3.43
1
V
µA
1.4
SHDN = VIN
SHDN = GND
VIN = 1.8V, IOUT = 0mA
VIN = 1.8V, VOUT = GND, SHDN = 3V
-1
-1
VOUT = 3.6V
1.8V < VIN < 3.6V, IOUT =
2.0V < VIN < 3.6V, IOUT ≤
3.0V < VIN < 3.6V, IOUT ≤
1.8V < VIN < 3.6V, IOUT =
VIN = 2.5V, IOUT = 50mA
VIN = 3V, IOUT = 100mA
VIN = 2.0V, IOUT = 20mA
Oscillator Free Running
1.8
0mA, SHDN = VIN
20mA
100mA
0mA, VSHDN = 0
0.3
1
1
0.2
300
3.46
3.46
20
3.6
3.6
0.01
25
30
90
750
VOUT
30
3.74
3.74
1
0.3
1
1
-1
-1
0.2
300
1. Under short-circuit conditions, the device may enter over-temperature protection mode.
2. IQ = IVIN + IVOUT. VOUT is pulled up to 3.8V to prevent switching.
4
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µA
mVP-P
%
kHz
V
V
µA
µA
ms
mA
V
µA
V
µA
mVP-P
1.4
SHDN = VIN
SHDN = GND
VIN = 1.8V, IOUT = 0mA
VIN = 1.8V, VOUT = GND, SHDN = 3V
V
%
kHz
V
V
µA
µA
ms
mA
DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Typical Characteristics — AAT3111-3.3
Unless otherwise noted, VIN = 3V, CIN = COUT = 10µF, CFLY = 1µF, TA = 25°C.
Output Voltage vs. Output Current
Supply Current vs. Supply Voltage
60
3.35
Supply Current (µA)
Output Voltage (V)
3.40
VIN = 2.3V VIN = 2.6V
3.30
VIN = 2.0V
3.25
VIN = 1.7V
3.20
No Load, Switching
40
30
20
No Load, Not Switching
10
0
95
90
0.1
1
10
100
1000
1.5
2.5
3.0
Supply Voltage (V)
Efficiency vs. Supply Voltage
Efficiency vs. Load Current
3.5
100
5mA
85
90
50mA
80
75
70
100mA
65
60
VIN = 1.8V
80
VIN = 2.0V
70
60
VIN = 2.6V
50
40
30
20
10
55
50
1.8
2.0
Output Current (mA)
Efficiency (%)
0.01
Efficiency (%)
50
2.0
2.2
2.4
2.6
2.8
0
0.01
3.0
0.1
1
10
100
Load Current (mA)
Supply Voltage (V)
Startup
VSHDN Threshold vs. Supply Voltage
VOUT
(1V/div)
ILOAD = 100mA
VIN = 2.3V
ILOAD = 50mA
VIN = 2.0V
ILOAD = 25mA
VIN = 2.0V
VSHDN Threshold (V)
0.9
SHDN
(2V/div)
0.8
VIH
0.7
0.6
VIL
0.5
0.4
1.5
Time (100µs/div)
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
Supply Voltage (V)
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Typical Characteristics — AAT3111-3.3
Unless otherwise noted, VIN = 3V, CIN = COUT = 10µF, CFLY = 1µF, TA = 25°C.
Load Transient Response
Load Transient Response
(VIN = 2.6V)
(VIN = 2.0V)
IOUT
(20mA/div)
IOUT
(50mA/div)
VOUT
AC Coupled
(20mV/div)
VOUT
AC Coupled
(20mV/div)
Time (50µs/div)
Time (50µs/div)
Output Ripple
Output Ripple
(IOUT = 100mA; VIN = 2.5V)
VOUT AC Coupled
(10mV/div)
VOUT AC Coupled
(10mV/div)
(IOUT = 50mA; VIN = 2.0V)
Time (2µs/div)
Time (1µs/div)
6
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Typical Characteristics — AAT3111-3.6
Unless otherwise noted, VIN = 3V, CIN = COUT = 10µF, CFLY = 1µF, TA = 25°C.
Supply Current vs. Supply Voltage
Output Voltage vs. Output Current
60
3.70
Supply Current (µA)
Ooutput Voltage (V)
3.75
VIN = 2.9V
3.65
3.60
3.55
VIN = 2.3V
VIN = 2.0V
3.50
3.45
0.01
50
No Load, Switching
40
30
20
No Load, Not Switching
10
0
0.1
1
10
100
1.6
1000
2.1
3.6
100
100
90
50mA
100mA
90
85
80
10mA
75
VIN = 2.0V
80
Efficiency (%)
95
Efficiency (%)
3.1
Efficiency vs. Load Current
Efficiency vs. Supply Voltage
70
65
60
70
60
VIN = 2.3V
50
40
VIN = 2.6V
30
20
10
55
50
2.6
Supply Voltage (V)
Output Current (mA)
0
1.8
2.0
2.2
2.4
2.6
2.8
3.0
0.01
3.2
0.1
1
10
100
Load Current (mA)
Supply Voltage (V)
Startup
VSHDN Threshold vs. Supply Voltage
SHDN
(2V/div)
VOUT
(1V/div)
ILOAD = 100mA
VIN = 2.1V
ILOAD = 50mA
VIN = 2.1V
VSHDN Threshold (V)
0.9
0.8
VIH
0.7
0.6
VIL
0.5
0.4
1.5
Time (100µs/div)
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
Supply Voltage (V)
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Typical Characteristics — AAT3111-3.6
Unless otherwise noted, VIN = 3V, CIN = COUT = 10µF, CFLY = 1µF, TA = 25°C.
Load Transient Response
Load Transient Response
(VIN = 2.4V)
(VIN = 2.1V)
IOUT
(20mA/div)
IOUT
(50mA/div)
VOUT
AC Coupled
(20mV/div)
VOUT
AC Coupled
(20mV/div)
Time (50µs/div)
Time (50µs/div)
Output Ripple
Output Ripple
(IOUT = 100mA; VIN = 3.0V)
VOUT AC Coupled
(10mV/div)
VOUT AC Coupled
(10mV/div)
(IOUT = 50mA; VIN = 2.5V)
Time (1µs/div)
Time (2µs/div)
8
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Functional Block Diagram
VIN
S2
SHDN
S1
CONTROL
C+
CVREF
S4
S3
VOUT
+
GND
Functional Description
Operation (Refer to block diagram)
The AAT3111 uses a switched capacitor charge pump to
boost an input voltage to a regulated output voltage.
Regulation is achieved by sensing the charge pump output voltage through an internal resistor divider network.
A switched doubling circuit is enabled when the divided
output drops below a preset trip point controlled by an
internal comparator. The charge pump switch cycling
enables four internal switches at two non-overlapping
phases. During the first phase, switches S1 and S4 are
switched on (short) and switches S2 and S3 are off
(open). The flying capacitor CFLY is charged to a level
approximately equal to input voltage VIN. On the second
phase, switches S1 and S4 are turned off (open), and S2
and S3 are turned on (short). The low side of the flying
capacitor CFLY is connected to GND during the first phase.
During the second phase, the flying capacitor CFLY is
switched so that the low side is connected to VIN. The
voltage at the high side of the flying capacitor CFLY is bootstrapped to 2VIN and is connected to the output through
switch S3. For each cycle phase, charge from input node
VIN is transported from a lower voltage to a higher voltage. This cycle repeats itself until the output node voltage
is high enough to exceed the preset input threshold of the
control comparator. When the output voltage exceeds the
internal trip point level, the switching cycle stops and the
charge pump circuit is temporarily placed in an idle state.
When idle, the AAT3111 has a quiescent current of 20µA
or less. The closed loop feedback system containing the
voltage sense circuit and control comparator allows the
AAT3111 to provide a regulated output voltage to the
limits of the input voltage and output load current. The
switching signal, which drives the charge pump, is created by an integrated oscillator within the control circuit
block. The free-running charge pump switching frequency
is approximately 750kHz. The switching frequency under
a load is a function of VIN, VOUT, COUT, and IOUT.
For each phase of the switching cycle, the charge transported from VIN to VOUT can be approximated by the following formula:
VPHASE ≈ CFLY · (2 · VIN · VOUT)
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9
DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
The relative average current that the charge pump can
supply to the output may be approximated by the following expression:
IOUT(AVG) α CFLY · (2 · VIN · VOUT) · FS
The AAT3111 has complete output short-circuit and thermal protection to safeguard the device under extreme
operating conditions. An internal thermal protection circuit senses die temperature and will shut down the
device if the internal junction temperature exceeds
approximately 145°C. The charge pump will remain disabled until the fault condition is relieved.
External Capacitor Selection
Careful selection of the three external capacitors CIN,
COUT, and CFLY is very important because they will affect
turn-on time, output ripple, and transient performance.
Optimum performance will be obtained when low ESR
ceramic capacitors are used. In general, low ESR may be
defined as less than 100mW. If desired for a particular
application, low ESR tantalum capacitors may be substituted; however, optimum output ripple performance may
not be realized. Aluminum electrolytic capacitors are not
recommended for use with the AAT3111 due to their
inherent high ESR characteristic.
Typically as a starting point, a capacitor value of 10µF
should be used for CIN and COUT with 1mF for CFLY when the
AAT3111 is used under maximum output load conditions.
Lower values for CIN, COUT, and CFLY may be utilized for light
load current applications. Applications drawing a load current of 10mA or less may use a CIN and COUT capacitor
value as low as 1µF and a CFLY value of 0.1µF. CIN and COUT
may range from 1µF for light loads to 10µF or more for
heavy output load conditions. CFLY may range from 0.01µF
to 2.2µF or more. If CFLY is increased, COUT should also be
increased by the same ratio to minimize output ripple. As
a basic rule, the ratio between CIN, COUT, and CFLY should
be approximately 10 to 1. The compromise for lowering
the value of CIN, COUT, and the flying capacitor CFLY is the
output ripple voltage may be increased. In any case, if the
external capacitor values deviate greatly from the recommendation of CIN = COUT = 10µF and CFLY = 1µF, the
AAT3111 output performance should be evaluated to
assure the device meets application requirements.
In applications where the input voltage source has very
low impedance, it is possible to omit the CIN capacitor.
However, if CIN is not used, circuit performance should be
evaluated to assure desired operation is achieved. Under
high peak current operating conditions that are typically
10
experienced during circuit start-up or when load demands
create a large inrush current, poor output voltage regulation can result if the input supply source impedance is
high, or if the value of CIN is too low. This situation can
be remedied by increasing the value of CIN.
Capacitor Characteristics
Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the
AAT3111. Ceramic capacitors offer many advantages
over their tantalum and aluminum electrolytic counterparts. A ceramic capacitor typically has very low ESR, is
lower cost, has a smaller PCB footprint, and is nonpolarized. Low ESR ceramic capacitors help maximize
charge pump transient response. Since ceramic capacitors are non-polarized, they are not prone to incorrect
connection damage.
Equivalent Series Resistance: ESR is a very important
characteristic to consider when selecting a capacitor. ESR
is a resistance internal to a capacitor that is caused by
the leads, internal connections, size or area, material
composition, and ambient temperature. Typically capacitor ESR is measured in milliohms for ceramic capacitors
and can range to more than several ohms for tantalum
or aluminum electrolytic capacitors.
Ceramic Capacitor Materials: Ceramic capacitors less
than 0.1µF are typically made from NPO or C0G materials. NPO and C0G materials generally have tight tolerance and are very stable over temperature. Larger
capacitor values are usually composed of X7R, X5R, Z5U,
or Y5V dielectric materials. Large ceramic capacitors (i.e.,
greater than 2.2µF) are often available in low-cost Y5V
and Z5U dielectrics. If these types of capacitors are
selected for use with the charge pump, the nominal value
should be doubled to compensate for the capacitor tolerance which can vary more than ±50% over the operating
temperature range of the device. A 10µF Y5V capacitor
could be reduced to less than 5µF over temperature; this
could cause problems for circuit operation. X7R and X5R
dielectrics are much more desirable. The temperature
tolerance of X7R dielectric is better than ±15%.
Capacitor area is another contributor to ESR. Capacitors
that are physically large will have a lower ESR when
compared to an equivalent material smaller capacitor.
These larger devices can improve circuit transient
response when compared to an equal value capacitor in
a smaller package size.
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Charge Pump Efficiency
The AAT3111 is a regulated output voltage doubling
charge pump. The efficiency (h) can simply be defined as
a linear voltage regulator with an effective output voltage
that is equal to two times the input voltage. Efficiency (h)
for an ideal voltage doubler can typically be expressed as
the output power divided by the input power.
η=
POUT
PIN
In addition, with an ideal voltage doubling charge pump,
the output current may be expressed as half the input
current. The expression to define the ideal efficiency (h)
can be rewritten as:
η=
POUT VOUT · IOUT
V
=
= OUT
PIN
VIN · 2IOUT
2VIN
-or-
η(%) = 100
VOUT
2VIN
For a charge pump with an output of 3.3V and a nominal
input of 1.8Vs, the theoretical efficiency is 91.6%. Due
to internal switching losses and IC quiescent current
consumption, the actual efficiency can be measured at
91%. These figures are in close agreement for output
load conditions from 1mA to 100mA. Efficiency will
decrease as load current drops below 0.05mA or when
the level of VIN approaches VOUT. Refer to the Typical
Char
acteristics section for measured plots of efficiency
versus input voltage and output load current for the
given charge pump output voltage options.
Short-Circuit and Thermal Protection
In the event of a short-circuit condition, the charge pump
can draw as much as 100mA to 400mA of current from
VIN. This excessive current consumption due to an output
short-circuit condition will cause a rise in the internal IC
junction temperature. The AAT3111 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
145°C, the thermal shutdown will disable the charge
pump switching cycle operation. The thermal limit system
has 10°C 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
135°C, the charge pump will then become active again.
The thermal protection system will cycle on and off if an
output short-circuit condition persists. This will allow the
AAT3111 to operate indefinitely in a short-circuit condition without damage to the device.
Output Ripple and Ripple Reduction
There are several factors that determine the amplitude
and frequency of the charge pump output ripple, the
values of COUT and CFLY, the load current IOUT, and the
level of VIN. Ripple observed at VOUT is typically a sawtooth waveform in shape. The ripple frequency will vary
depending on the load current IOUT and the level of VIN.
As VIN increases, the ability of the charge pump to transfer charge from the input to the output becomes greater; as it does, the peak-to-peak output ripple voltage
will also increase.
The size and type of capacitors used for CIN, COUT, and
CFLY have an effect on output ripple. Since output ripple
is associated with the R/C charge time constant of these
two capacitors, the capacitor value and ESR will contribute to the resulting charge pump output ripple. This is
why low ESR capacitors are recommended for use in
charge pump applications. Typically, output ripple is not
greater than 35mVP-P when VIN = 2.0V, VOUT = 3.3V, COUT
= 10µF, and CFLY = 1µF.
When the AAT3111 is used in light output load applications where IOUT < 10mA, the flying capacitor CFLY value
can be reduced. The reason for this effect is when the
charge pump is under very light load conditions, the
transfer of charge across CFLY is greater during each phase
of the switching cycle. The result is higher ripple seen at
the charge pump output. This effect will be reduced by
decreasing the value of CFLY. Caution should be observed
when decreasing the flying capacitor. If the output load
current rises above the nominal level for the reduced CFLY
value, charge pump efficiency can be compromised.
There are several methods that can be employed to
reduce output ripple depending upon the requirements
of a given application. The most simple and straightforward technique is to increase the value of the COUT
capacitor. The nominal 10µF COUT capacitor can be
increased to 22µF or more. Larger values for the COUT
capacitor (22µF and greater) will by nature have lower
ESR and can improve both high and low frequency components of the charge pump output ripple response. If a
higher value tantalum capacitor is used for COUT to
reduce low frequency ripple elements, a small 1µF low
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
ESR ceramic capacitor should be added in parallel to the
tantalum capacitor (see Figure 1). The reason for this is
tantalum capacitors typically have higher ESR than
equivalent value ceramic capacitors and are less able to
reduce high-frequency components of the output ripple.
The only disadvantage to using large values for the COUT
capacitor is the AAT3111 device turn-on time and inrush
current may be increased.
If additional ripple reduction is desired, an R/C filter can
be added to the charge pump output in addition to the
COUT capacitor (see Figure 2). An R/C filter will reduce
output ripple by primarily attenuating high frequency
components of the output ripple waveform. The low frequency break point for the R/C filter will significantly
depend on the capacitor value selected.
VOUT
(3.3V)
COUT2
1µF
COUT1
22µF
+
VOUT
High charge pump switching frequencies and large peak
transient currents mandate careful printed circuit board
layout. As a general rule for charge pump boost converters, all external capacitors should be located as closely
as possible to the device package with minimum length
trace connections. Maximize the ground plane around
the AAT3111 charge pump and make sure all external
capacitors are connected to the immediate ground plane.
A local component side ground plane is recommended. If
this is not possible due the layout design limitations,
assure good ground connections by the use of large or
multiple PCB vias.
Refer to the AAT3111 evaluation board for an example of
good charge pump layout design (Figures 3 through 5).
C+
AAT3111
GND
ON/OFF
Layout Considerations
SHDN
CFLY
1µF
VIN
+
C-
CIN
10µF
VIN
(1.8V to 3.3V)
Figure 1: Application Using Tantalum Capacitor.
VOUT
(3.3V)
RFILTER
1.5Ω
CFILTER
33µF
COUT
10µF
ON/OFF
VOUT
C+
AAT3111
GND
SHDN
VIN
C-
CFLY
1µF
CIN
10µF
VIN
(1.8V to 3.3V)
Figure 2: Application With Output Ripple Reduction Filter.
12
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Figure 3: Evaluation Board
Top Side Silk Screen Layout /
Assembly Drawing.
Figure 4: Evaluation Board
Component Side Layout.
Figure 5: Evaluation Board
Solder Side Layout.
Typical Application Circuit
VOUT
COUT
10µF
VOUT
AAT3111
GND
ON/OFF
C+
SHDN
VIN
C-
CFLY
1µF
CIN
10µF
VIN
Figure 6: Typical Charge Pump Boost Converter Circuit.
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
Ordering Information
Output Voltage
Package
Marking1
Part Number (Tape and Reel)2
3.3V
3.6V
3.3V
3.6V
SOT23-6
SOT23-6
SC70JW-8
SC70JW-8
BPXYY
BOXYY
BPXYY
BOXYY
AAT3111IGU-3.3-T1
AAT3111IGU-3.6-T1
AAT3111IJS-3.3-T1
AAT3111IJS-3.6-T1
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Package Information
SOT23-6
2.85 ± 0.15
1.90 BSC
2.80 ± 0.20
0.15 ± 0.07
4° ± 4°
10° ± 5°
1.20 ± 0.25
1.10 ± 0.20
0.075 ± 0.075
1.575 ± 0.125
0.95 BSC
0.40 ± 0.10 × 6
0.60 REF
0.45 ± 0.15
GAUGE PLANE
0.10 BSC
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
14
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DATA SHEET
AAT3111
MicroPowerTM Regulated Charge Pump
SC70JW-8
2.20 ± 0.20
1.75 ± 0.10
0.50 BSC 0.50 BSC 0.50 BSC
0.225 ± 0.075
2.00 ± 0.20
0.100
0.15 ± 0.05
0.45 ± 0.10
4° ± 4°
0.05 ± 0.05
7° ± 3°
1.10 MAX
0.85 ± 0.15
0.048REF
2.10 ± 0.30
All dimensions in millimeters.
Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.
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