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PDF AAT1265 Data sheet ( Hoja de datos )
| Número de pieza | AAT1265 | |
| Descripción | Step-Up DC/DC Converter | |
| Fabricantes | AAT | |
| Logotipo |  |
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AAT1265
Low Voltage 2MHz Step-Up DC/DC
Converter in SC70JW Package
General Description
Features
SwitchReg™
The AAT1265 is a member of Analogic Tech's Total
• 100mA Output from a Single AA Cell Input
Power Management IC™ (TPMIC™) product family
• 250mA Output from a Dual AA Cell Input
and is designed for single-cell or dual-cell alkaline,
NiMH, or NiCd battery-powered applications. It is a
• VIN Operation Range: 0.8V to VOUT
• Up to 93% Efficiency
high efficiency, synchronous, fixed frequency, step-
• Low Start-Up Voltage: 1.0V Typical
up converter with true output disconnect during
• Internal Synchronous Rectifier
shutdown (<1.0µA), start-up inrush current limit, and
• Current Mode Control with Internal Feedback
short-circuit protection.
and Compensation
The high 2MHz switching frequency and completely
integrated control circuitry minimize the total solution
footprint area while maintaining excellent regulation,
ripple, and transient response throughout the full
load range.
• 2MHz Fixed Switching Frequency
• 1A Current Limit
• Maintains High Efficiency Over the Output
Current Range for Improved Battery Life
• Low 40µA No Load Bias Current
• True Load Disconnect
Light load switching frequency modulation and low
• Short-Circuit and Over-Current Protection
quiescent current maintain high efficiency perform-
• Inrush Current Limit and Soft Start
ance for light load and sleep mode conditions.
• Low Shutdown Current: <1.0µA
With a 1A peak switch current limit, the AAT1265 is
capable of delivering 100mA to a 3.3V load with a
• -40°C to +85°C Temperature Range
• 2.0x2.1mm SC70JW-8 Package
single AA cell or up to 250mA from a dual AA cell.
The device has a 1.0V start-up voltage with opera-
tion down to 0.8V.
Applicationswww.DataSheet4U.com
The AAT1265 is available in a Pb-free, space-sav-
ing 2.0x2.1mm 8-pin SC70JW package and is
• Bluetooth™ Headsets
rated over the -40°C to +85°C temperature range.
• Digital Cameras
• Medical Instruments
• Mobile Handsets
• MP3 and Portable Music Players
Typical Application
VIN
2.2µH
4.7µF
AAT1265
LX VCC
VOUT
VIN OUT
EN GND
4.7µF
1265.2006.05.1.1
100
90
80
70
60
50
0.1
Dual-Cell to 3.3V Efficiency
vs. Output Current
VIN = 3.0V
VIN = 2.4V VIN = 2.0V
1.0
10.0
100.0
Output Current (mA)
1000.0
1
1 page  
AAT1265
Low Voltage 2MHz Step-Up DC/DC
Converter in SC70JW Package
Typical Characteristics
Single-Cell to 3.3V Efficiency
100
90
80
70
60
50
0.1
VIN = 1.5V
VIN = 1.2V
1 10 100
Output Current (mA)
1000
Dual-Cell to 3.3V Efficiency
100
90
80
70
60
50
0.1
VIN = 3.0V
VIN = 2.4V VIN = 2.0V
1 10 100
Output Current (mA)
1000
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0.1
Single-Cell Load Regulation
(VO = 3.3V)
VIN = 1.5V
VIN = 1.2V
1 10
Output Current (mA)
100
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0.1
Dual-Cell Load Regulation
(VO = 3.3V)
VIN = 3.0V
VIN = 2.4V
VIN = 2.0V
1 10 100
Output Current (mA)
1000
Minimum Start-Up Voltage vs. Load Current
2.4
2.2
2.0 Constant Current Load
1.8
1.6
1.4
Resistive Load
1.2
1.0
0.8
0
2
40 60 80 100 120 140 160
Current (mA)
PFM Mode Output Current Threshold
vs. Input Voltage
120
100
Increasing Load
80
60
40 Decreasing Load
20
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Input Voltage (V)
1265.2006.05.1.1
5
5 Page 
AAT1265
Low Voltage 2MHz Step-Up DC/DC
Converter in SC70JW Package
Manufacturer
Murata
www.murata.com
TDK
www.tdk.com
Taiyo Yuden
www.t-yuden.com
Value
4.7µF
4.7µF
4.7µF
Part
Output or Input Capacitor
Input Capacitor
Output or Input Capacitor
Input Capacitor
Output or Input Capacitor
Input Capacitor
Voltage
10V
6.3V
10V
6.3V
10V
6.3V
Case Size
0805
0603
0805
0603
0805
0603
Part Number
GRM21BR61A475KA73L
GRM188R60J475KE19D
C2012X5R1A475K
C1608X5ROJ475K
LMK212BJ475MG
JMK107BJ475MA
Manufacturer
Sumida
www.sumida.com
Cooper Electronics
www.cooperet.com
Value
2.2µH
Part
Inductor
ISAT
1.50A
Voltage
75mΩ
Case Size
3.2 x 3.2 x 1.55
Part Number
CDRH2D14-2R2
2.2µH
Inductor 1.62A
69mΩ
3.1 x 3.1 x 1.85 SD3118-2R2
Table 1: Suggested Component Selection.
1265.2006.05.1.1
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AAT1265.PDF ] | |
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