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PDF A7533 Data sheet ( Hoja de datos )
| Número de pieza | A7533 | |
| Descripción | SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER | |
| Fabricantes | AiT | |
| Logotipo |  |
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AiT Semiconductor Inc.
www.ait-ic.com
A7533
0.85V STARTUP, 1MHZ, 300mA IOUT
SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER
DESCRIPTION
The A7533 is a step-up converter that provides a
boosted output voltage from a low voltage source.
Because of its proprietary design, it starts up at a
very low input voltage down to 850mV, making it an
ideal choice for single cell alkaline/ NiMH battery
operations.
A switching frequency of 1MHz minimizes solution
footprint by allowing the use of tiny, low profile
inductors and ceramic capacitors. The current
mode PWM design is internally compensated,
reducing external parts count.
The A7533 is available in SOT-25 and SOT-89-3
Package.
ORDER INFORMATION
Package Type
Part Number
SOT-25
E5
A7533E5R-XX
A7533E5VR-XX
SOT-89-3
K3
A7533K3R-XX
A7533K3VR-XX
XX=Output , ADJ=Adjustable
Note
V: Green Package
R : Tape & Reel
AiT provides all Pb free products
Suffix “ V “ means Green Package
FEATURES
Up to 95% Efficiency
Output voltage accuracy ±3%
1MHz Switching Frequency allows small
inductor and output cap
Input boost-strapping allows using small or no
input cap
Low VIN Start-up Voltage down to 850mV Ideal
for Single Alkaline Cell operations
Maximum Output Current up to 300mA
Low Noise PWM control
Internally Compensated Current Mode Control
Internal Synchronous Rectifier
Logic Control Shutdown (IQ < 1uA)
Available in SOT-25 and SOT-89-3 Package.
APPLICATION
One to Three Cell Battery Operated Devices
Medical Instruments
Bluetooth Headsets
Flash-Based MP3 Players
Noise Canceling Headphones
TYPICAL APPLICATION
NOTE: Input capacitor (CIN = 0.47uF) and Output capacitor (COUT ≥ 4.7uF) are recommended in all application circuit.
REV1.1
- JUL 2010 RELEASED, JUL 2011 REVISED -
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A7533
0.85V STARTUP, 1MHZ, 300mA IOUT
SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
Typical values are tested at TA = 25℃, unless otherwise specified.
1. Efficiency vs. Output Current
2. Efficiency vs. Output Current
VOUT = 3.3V, TA = 25℃
VOUT = 5V, TA = 25℃
3. Output Voltage vs. Output Current
VOUT = 3.3V, TA = 25℃
4. Minimum Start-Up Voltage vs. Output Current
VOUT = 3.3V, TA = 25℃
5. Maximum Output Current vs. Input Voltage
L = 4.7uH, TA = 25℃
6. No Load Input Current vs. Input Voltage
VOUT = 3.3V, TA = 25℃, No load
REV1.1
- JUL 2010 RELEASED, JUL 2011 REVISED -
-5-
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
IMPORTANT NOTICE
A7533
0.85V STARTUP, 1MHZ, 300mA IOUT
SYNCHRONUS BOOST STEP-UP DC-DC CONVERTER
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer. As used herein may
involve potential risks of death, personal injury, or servere property, or environmental damage. In order to
minimize risks associated with the customer's applications, the customer should provide adequate design and
operating safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.1
- JUL 2010 RELEASED, JUL 2011 REVISED -
- 11 -
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet A7533.PDF ] | |
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