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Numéro de référence AAT3221
Description 150 mA Nanopower LDO Linear Regulator
Fabricant Skyworks 
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AAT3221 Datasheet, Description
DATA SHEET
AAT3221/AAT3222: 150 mA NanopowerTM LDO Linear
Regulator
Applications
Cellular phones
Digital cameras
Handheld electronics
Notebook computers
PDAs
Portable communication devices
Remote controls
Features
Quiescent current: 1.1 µA
Low dropout: 200 mV (typical)
Guaranteed output: 150 mA
High accuracy: ±2%
Current limit protection
Over-temperature protection
Extremely low power shutdown mode
Low temperature coefficient
Factory-programmed output voltages: 1.5 V to 3.5 V
Stable operation with virtually any output capacitor type
Active high or low enable pin
Small, 5-pin SOT23 or 8-pin SC70JW (AAT3221 only) package
(MSL1, 260 °C per JEDEC-J-STD-020)
Description
The AAT3221 and AAT3222 NanoPower™ Low Drop Out (LDO)
linear regulators are ideal for portable applications where
extended battery life is critical. These devices feature extremely
low quiescent current, typically 1.1 µA. Dropout voltage is also
very low, typically less than 200 mV at the maximum output
current of 150 mA. The AAT3221/3222 have an enable pin which,
when asserted, places the LDO regulator into shutdown mode,
removing power from its load and offering extended power
conservation capabilities for portable battery-powered
applications.
The AAT3221/3222 have output short-circuit and over-current
protection. In addition, the devices also have an over-temperature
protection circuit that shuts down the LDO regulator during
extended over-current events. Both devices are available with
active high or active low enable input.
The AAT3221 and AAT3222 are available in Pb-free, space-saving
5-pin SOT23 packages. The AAT3221 is also available in a
Pb-free, 8-pin SC70JW package. Since only a small, 1 µF
ceramic output capacitor is recommended, often the only space
used is that occupied by the AAT3221 or AAT3222. The
AAT3221/3222 provide a compact and cost-effective voltage
conversion solution.
Both devices are similar to the AAT3220, with the exception that
they offer further power savings with an enable pin.
A typical application circuit is shown in Figure 1. The pin
configuration is shown in Figures 2, 3, and 4. Signal pin
assignments and functional pin descriptions are provided in
Table 1.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202251B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 17, 2013
1
AAT3221 Fiche technique
DATA SHEET • AAT3221/AAT3222 150 mA NANOPOWERTM LDO LINEAR REGULATOR
Electrical and Mechanical Specifications
The absolute maximum ratings of the AAT3221/3222 are provided
in Table 2.
The recommended operating conditions are specified in Table 3,
and electrical specifications are provided in Table 4.
Typical performance characteristics of the AAT3221/3222 are
illustrated in Figures 5 through 22.
Table 2. AAT3221/3222 Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Minimum
Typical
Maximum
Units
Input Voltage, <30 ms, 10% DC (continuous max. = 6.0 V) VIN
0.3
+7 V
EN(EN) to GND Voltage
VEN 0.3
+6 V
Maximum EN(EN) to Input Voltage
VENIN(MAX)
0.3 V
Maximum DC Output Current
IOUT
PD/(VIN VO)
mA
Operating Junction Temperature Range
TJ
40
+150
ºC
Thermal Resistance (Note 2)
θJA SOT23-5 150 ºC/W
SC70JW-8
160
ºC/W
Power Dissipation (Note 2)
PD SOT23-5
667
mW
SC70JW-8
625
mW
Electrostatic Discharge:
Human Body Model, Class 3A
ESD
4000 V
Note 1: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device.
Note 2: Support IN high voltage pulse up to 7 V lasting 8 µs.
CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times.
Table 3. AAT3221/3222 Recommended Operating Conditions
Parameter
Symbol
Minimum
Typical
Input voltage (Note 1)
VIN (VOUT + VDO)
Ambient temperature range
TA 40
Note 1: To calculate minimum input voltage, use the following equation: VIN(MIN) = VOUT(MAX) + VDO(MAX) as long as VIN ≥ 2.5 V.
Maximum
5.5
+85
Units
V
°C
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202251B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 17, 2013
3

3 Page

AAT3221 pdf
DATA SHEET • AAT3221/AAT3222 150 mA NANOPOWERTM LDO LINEAR REGULATOR
Typical Performance Characteristics
(VIN = VOUT + 1 V, TA = 25 °C, COUT = 5.6 µF Ceramic, IOUT = 1 mA, Unless Otherwise Noted)
Figure 5. Output Voltage vs Output Current
Figure 6. Output Voltage vs Input Voltage
Figure 7. Output Voltage vs Input Voltage
Figure 8. Dropout Voltage vs Output Current
Figure 9. Supply Current vs Input Voltage
Figure 10. PSRR with 10 mA Load
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
6 May 17, 2013 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202251B

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