AAT1265IJS-3.3-T1 AnalogicTech, AAT1265IJS-3.3-T1 Datasheet

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AAT1265IJS-3.3-T1

Manufacturer Part Number
AAT1265IJS-3.3-T1
Description
Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package
Manufacturer
AnalogicTech
Datasheet

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Part Number:
AAT1265IJS-3.3-T1
Manufacturer:
ANALOGIC
Quantity:
20 000
General Description
The AAT1265 is a member of Analogic Tech's Total
Power Management IC™ (TPMIC™) product family
and is designed for single-cell or dual-cell alkaline,
NiMH, or NiCd battery-powered applications. It is a
high efficiency, synchronous, fixed frequency, step-
up converter with true output disconnect during
shutdown (<1.0µA), start-up inrush current limit, and
short-circuit protection.
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.
Light load switching frequency modulation and low
quiescent current maintain high efficiency perform-
ance for light load and sleep mode conditions.
With a 1A peak switch current limit, the AAT1265 is
capable of delivering 100mA to a 3.3V load with a
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.
The AAT1265 is available in a Pb-free, space-sav-
ing 2.0x2.1mm 8-pin SC70JW package and is
rated over the -40°C to +85°C temperature range.
Typical Application
1265.2006.05.1.1
V
IN
4.7µF
2.2µH
LX
VIN
EN
AAT1265
GND
OUT
VCC
V
OUT
4.7µF
Low Voltage 2MHz Step-Up DC/DC
Features
Applications
100
90
80
70
60
50
0.1
100mA Output from a Single AA Cell Input
250mA Output from a Dual AA Cell Input
V
Up to 93% Efficiency
Low Start-Up Voltage: 1.0V Typical
Internal Synchronous Rectifier
Current Mode Control with Internal Feedback
and Compensation
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
Short-Circuit and Over-Current Protection
Inrush Current Limit and Soft Start
Low Shutdown Current: <1.0µA
-40°C to +85°C Temperature Range
2.0x2.1mm SC70JW-8 Package
Bluetooth™ Headsets
Digital Cameras
Medical Instruments
Mobile Handsets
MP3 and Portable Music Players
Converter in SC70JW Package
IN
Operation Range: 0.8V to V
V
Dual-Cell to 3.3V Efficiency
IN
= 3.0V
1.0
vs. Output Current
V
Output Current (mA)
IN
= 2.4V
10.0
V
SwitchReg
IN
= 2.0V
100.0
OUT
1000.0
1

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AAT1265IJS-3.3-T1 Summary of contents

Page 1

General Description The AAT1265 is a member of Analogic Tech's Total Power Management IC™ (TPMIC™) product family and is designed for single-cell or dual-cell alkaline, NiMH, or NiCd battery-powered applications high efficiency, synchronous, fixed frequency, step- up ...

Page 2

Pin Descriptions Pin # Symbol Function 1 VCC Bias supply voltage after start-up and feedback to the output voltage error amplifier Enable pin. Logic high enables the IC. Logic low disables the IC and disconnects the load from ...

Page 3

Absolute Maximum Ratings Symbol Description V VIN, OUT, VCC, EN GND N T Operating Junction Temperature Range J T Maximum Soldering Temperature (at leads, 10 sec) LEAD Thermal Characteristics Symbol Description θ Maximum Thermal Resistance JA P Maximum ...

Page 4

Electrical Characteristics V = 1.2V 3.3V -40°C to +85°C, unless otherwise noted. Typical values are T IN OUT A Symbol Description Minimum Start-Up Voltage V IN Operating Input Voltage Range V Output Voltage Accuracy OUT Quiescent ...

Page 5

Typical Characteristics Single-Cell to 3.3V Efficiency 100 Output Current (mA) Single-Cell Load Regulation (V = 3.3V) O 2.0 1.5 1.0 0.5 0 ...

Page 6

Typical Characteristics No Load Input Current vs. Input Voltage 200 160 120 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Input Voltage (V) Maximum Load Current Capacity for a 4% Drop in Output Voltage vs. Input Voltage (V ...

Page 7

Typical Characteristics Soft-Start Inrush Current (V = 1.2V 40mA Output Voltage Input Current - Time (500µs/div) Full Load Output Ripple (V = 1.2V; 100mA Load ...

Page 8

Functional Block Diagram VCC Voltage Reference GND Functional Description The AAT1265 synchronous step-up converter is targeted for single- or dual-cell alkaline, NiMH, and NiCd battery applications. It has a 1V typical start- up voltage with operation after start-up to less ...

Page 9

MOSFET, forcing DCM operation at light load. These controls, along with very low quiescent cur- rent, help to maintain high efficiency over the com- plete load range without the compromise of increased output voltage ripple during light load conditions. ...

Page 10

Figure 1: AAT1265 Evaluation Board Top Side. Enable Figure 4: AAT1265 Evaluation Board Schematic. 10 Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package Figure 3: AAT1265 Evaluation Board Bottom Side AAT1265 1 8 VCC GND 1 ...

Page 11

Manufacturer Value Murata 4.7µF www.murata.com TDK 4.7µF www.tdk.com Taiyo Yuden 4.7µF www.t-yuden.com Manufacturer Value Sumida 2.2µH www.sumida.com Cooper Electronics 2.2µH www.cooperet.com Table 1: Suggested Component Selection. 1265.2006.05.1.1 Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package Part Voltage Output or ...

Page 12

... All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 12 Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package Marking Part Number (Tape and Reel) 1 RLXYY SC70JW-8 0.225 ± 0.075 0.100 0.45 ± 0.10 2.10 ± 0.30 2 AAT1265IJS-3.3-T1 0.048REF 4° ± 4° 1265.2006.05.1.1 ...

Page 13

... AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. ...

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