AAT1276 Datasheet PDF - Advanced Analogic Technologies
Part Number | AAT1276 | |
Description | Boost Converter | |
Manufacturers | Advanced Analogic Technologies | |
Logo | ||
There is a preview and AAT1276 download ( pdf file ) link at the bottom of this page. Total 18 Pages |
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PRODUCT DATASHEET
AAT1276
Boost Converter with USB Power Switch
General Description
The AAT1276 SwitchReg is a 2MHz, 500mA synchronous
boost converter with an integrated current-limiting load
switch controlled output. The AAT1276 operates from a
single-cell Lithium-ion/ polymer battery source and pro-
vides a regulated 5V, current limit controlled output to
support USB port VBUS applications in portable consumer
electronic products. The AAT1276 can support both USB
2.0 host port and USB on-the-go operation, as well as
www.DatagSeheneet4raUl.cpomurpose applications where a 5V supply with a
user programmable current limit is needed.
The high efficiency boost converter section of the
AAT1276 is typically set for a 5V output and can deliver
up to 500mA load current to support USB VBUS operation
from an input supply as low as 2.7V. The high boost
converter switching frequency (up to 2.0MHz) provides
fast load transient and allows the use of small external
components. Fully integrated control circuitry simplifies
system design and reduces total solution size.
The integrated, programmable current limiting load
switch provides USB port protection for portable devices
allowing the AAT1276 to supply a 5V USB VBUS up to
500mA. The load switch provides an active low fault flag
to alert the system in the event of an over-current condi-
tion applied to the AAT1276 output.
The AAT1276 is available in the Pb-free, space-saving
12-pin TSOPJW and 16-pin TDFN34 packages and is
rated over the -40°C to +85°C operating temperature
range.
Typical Application
Features
• High Frequency Boost With 5V / 500mA Output Capability
From a Single-Cell Lithium-Ion/Polymer Battery
• Input Voltage Range: 2.7V to 5V
• VOUT1 Adjustable or Fixed (5V)
• >90% Efficiency
• Up to 2MHz Switching Frequency
• True Load Disconnect
• Load Switch With Programmable Current Limit
• Over-Temperature, Over-Current Protection
• Inrush Current Limit
• Fault Report
• Low Shutdown Current < 1μA Typical
• -40°C to +85°C Temperature Range
• TSOPJW-12 and TDFN34-16 Packages
Applications
• USB On-the-Go
• Cell Phones
• Digital Still Cameras
• PDAs and Portable Media Players
• Smart Phones
• Other Hand-Held Devices
VIN
Fault
Enable
CIN
4.7μF
10k
RSET
L1 2.2μH
LIN
IN
SW
OUT1
VCC
FB
AAT1276
FLT
EN
OUT2
SET
GND
RFB1
432k
RFB2
59k
COUT1
4.7μF
COUT2
1μF
VBUS Output
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SwitchRegTM
Typical Characteristics
Efficiency vs. Load
100
80
60
40
www.DataSheet4U.com
20
VIN = 2.7V
VIN = 4.2V
VIN = 3.6V
0
0.1 1
10 100
Output Current (mA)
1000
Line Regulation
(IOUT = 300mA)
4.960
4.958
4.956
4.954
4.952
4.950
4.948
4.946
4.944
4.942
4.940
3.6 3.7 3.8 3.9 4.0 4.1 4.2
Input Voltage (V)
No Load Current vs. Supply Voltage
140
120
85°C
100
80
60
-40°C
25°C
40
20
0
2.7 2.9 3.2 3.4 3.6 3.9 4.1 4.3 4.5 4.8 5.0
Supply Voltage (V)
PRODUCT DATASHEET
AAT1276
Boost Converter with USB Power Switch
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
DC Regulation
(VOUT = 5.0V)
VIN = 4.2V
VIN = 2.7V VIN = 3.6V
1 10 100
Output Current (mA)
1000
Output Voltage vs. Temperature
(VIN = 3.6V; 50Ω Load)
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-50
-25
0
25 50 75
Temperature (°C)
100
No Load Current vs. Temperature
(VIN = 3.6V; VOUT = 5.0V)
140
120
100
80
60
40
20
0
-50
0
50 100
Temperature (°C)
150
1276.2007.11.1.1
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AAT1276 electronic component. |
Information | Total 18 Pages | |
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Download | [ AAT1276.PDF Datasheet ] |
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