DESCRIPTION
converter delivering high efficiency in a SOT23-6 package. The device has an internal NMOS switch and PMOS synchronous rectifier and has the capacity of supplying 3.3V at 100mA from a single AA cell input.
High frequency switching (up to 2MHz) minimizes the board area by allowing the use of tiny, low profile inductors and ceramic capacitors.
The KB3436 provides automatic pulse skipping at light loads, thus reducing the supply current for extended battery life. At shutdown, the KB3436 fully discharges the output to ground and draws no supply current.
The KB3436 is available in small SOT23-6 package with both fixed and adjustable output voltage versions.

FEATURES
*Up to 96% efficiency
*Low start-up voltage 0.8V
*Internal synchronous rectifier
*Up to 2MHz switching allows for tiny external components
*0.5V to 4.4V input range
*2.5V to 5.0V output range (Note 3)
*Feedback Voltage: 1.00V +/-2%
*Logic controlled shutdown (<1μA)
*Low 250μA operating supply current (measured at VOUT)
*Pulse skipping at light load for extended battery life
*Generates 3.3V at 100mA from single AA cell
*Stable with ceramic output capacitor
*Low profile 6-Leads SOT23-6 package

APPLICATIONS
*PDAs and organizers
*Digital cameras
*Wireless mice/ keyboards
*Portable medical equipment
*Cordless phones
*Wireless Headsets

GENERAL DESCRIPTION
The ALD2721E/ALD2721 is a dual monolithic rail-to-rail precision CMOS operational amplifier with integrated user programmable EPAD (Electrically Programmable Analog Device) based offset voltage adjustment. The ALD2721E/ALD2721 is a dual version of the ALD1721E/ALD1721 operational amplifier. Each ALD2721E/ALD2721 operational amplifier features individual, user-programmable offset voltage trimming resulting in significantly enhanced total system performance and user flexibility. EPAD technology is an exclusive ALD design which has been refined for analog applications where precision voltage trimming is necessary to achieve a desired performance. It utilizes CMOS FETs as in-circuit elements for trimming of offset voltage bias characteristics with the aid of a personal computer under software control. Once programmed, the set parameters are stored indefinitely. EPAD offers the circuit designer a convenient and cost-effective trimming solution for achieving the very highest amplifier/system performance.
The ALD2721E/ALD2721 dual operational amplifier features rail-to-rail input and output voltage ranges, tolerance to overvoltage input spikes of 300mV beyond supply rails, capacitive loading up to 50pF, extremely low input currents of 0.01pA typical, high open loop voltage gain, useful bandwidth of 700KHz, slew rate of 0.7V/ms, and low typical supply current of 200mA for both amplifiers.

KEY FEATURES
*EPAD ( Electrically Programmable Analog Device)
*User programmable VOS trimmer
*Computer-assisted trimming
*Rail-to-rail input/output
*Compatible with standard EPAD Programmer
*Each amplifier VOS can be trimmed to a different Vos level
*High precision through in-system circuit trimming
*Reduces or eliminates VOS, PSRR, CMRR and TCVOS errors
*System level “calibration” capability
*Application Specific Programming mode
*In-System Programming mode
*Electrically programmable to compensate for external component tolerances
*Achieves 0.01pA input bias current and 35mV input offset voltage with micropower
*Low voltage operation

APPLICATIONS
*Sensor interface circuits
*Transducer biasing circuits
*Capacitive and charge integration circuits
*Biochemical probe interface
*Signal conditioning
*Portable instruments
*High source impedance electrode amplifiers
*Precision Sample and Hold amplifiers
*Precision current to voltage converter
*Error correction circuits
*Sensor compensation circuits
*Precision gain amplifiers
*Periodic In-system calibration
*System output level shifter

ALD2721EDB, ALD2721ESB, ALD2721E PB, ALD2721DB ALD2721SB ALD2721PB

GENERAL DESCRIPTION
The ALD2726E/ALD2726 is a dual monolithic rail-to-rail precision CMOS operational amplifier with integrated user programmable EPAD (Electrically Programmable Analog Device) based offset voltage adjustment. The ALD2726E/ALD2726 is a dual version of the ALD1726E/ALD1726 operational amplifier. Each ALD2726E/ALD2726 operational amplifier features individual, user-programmable offset voltage trimming resulting in significantly enhanced total system performance and user flexibility. EPAD technology is an exclusive ALD design which has been refined for analog applications where precision voltage trimming is necessary to achieve a desired performance. It utilizes CMOS FETs as in-circuit elements for trimming of offset voltage bias characteristics with the aid of a personal computer under software control. Once programmed, the set parameters are stored indefinitely. EPAD offers the circuit designer a convenient and cost-effective trimming solution for achieving the very highest amplifier/system performance.
The ALD2726E/ALD2726 dual operational amplifier features rail-to-rail input and output voltage ranges, tolerance to overvoltage input spikes of 300mV beyond supply rails, capacitive loading up to 25pF, extremely low input currents of 0.01pA typical, high open loop voltage gain, useful bandwidth of 700KHz, slew rate of 0.7V/ms, and low typical supply current of 50mA for both amplifiers.

KEY FEATURES
*EPAD ( Electrically Programmable Analog Device)
*User programmable VOS trimmer
*Computer-assisted trimming
*Rail-to-rail input/output
*Compatible with standard EPAD Programmer
*Each amplifier VOS can be trimmed to a different Vos level
*High precision through in-system circuit trimming
*Reduces or eliminates VOS, PSRR, CMRR and TCVOS errors
*System level “calibration” capability
*Application Specific Programming mode
*In-System Programming mode
*Electrically programmable to compensate for external component tolerances
*0.01pA input bias current and 35mV input offset voltage
*±1V to ±5V operation

APPLICATIONS
*Sensor interface circuits
*Transducer biasing circuits
*Capacitive and charge integration circuits
*Biochemical probe interface
*Signal conditioning
*Portable instruments
*High source impedance electrode amplifiers
*Precision Sample and Hold amplifiers
*Precision current to voltage converter
*Error correction circuits
*Sensor compensation circuits
*Precision gain amplifiers
*Periodic In-system calibration
*System output level shifter

ALD2726E, ALD2726EDB, ALD2726ESB, ALD2726EPB, ALD2726DB, ALD2726SB

GENERAL DESCRIPTION
The AMS3100-2.5 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 20μA to 20mA current range. AMS3100-2.5 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance. The advanced process technology used, makes the AMS3100-2.5 exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain, makes these reference diodes useful for micropower circuitry. These voltage references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further more, the wide operating current allows it to replace older references with a tight tolerance part. Pin to pin compatible with other standard industry references, the AMS3100-2.5 offers the advantage of long term stability at low cost.
The AMS3100-2.5 is operating over a -40°C to 85°C temperature range and is available in the space saving SOT-23 package.

FEATURES
*±12 mV (±0.5%) max. initial tolerance (A grade)
*Operating Current 20μA to 20mA
*Low Voltage Reference 2.50V
*Max. 0.5Ω Dynamic Impedance (A grade)
*Low Temperature Coefficient
*SOT-23 Package Available
*Low cost

APPLICATIONS
*Battery Powered Systems
*Instrumentation
*A/D, D/A Converters
*Temperature measurement
*Current sources
*Notebook/Personal Computer
*Monitors/ VCR/ TV
*Pagers

AMS3100-2.5AM, AMS3100-2.5BM, AMS3100-2.5CM

DESCRIPTION
OPA336 series microPower CMOS operational amplifiers are designed for battery-powered applications.
They operate on a single supply with operation as low as 2.1V.
The output is rail-to-rail and swings to within 3mV of the supplies with a 100kW load.
The common-mode range extends to the negative supply—ideal for single-supply
applications.
Single, dual, and quad versions have identical specifications for maximum design flexibility.
In addition to small size and low quiescent current (20mA/amplifier), they feature low offset voltage (125mV max), low input bias current (1pA), and high openloop gain (115dB).
Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction.
OPA336 packages are the tiny SOT23-5 surface mount and SO-8 surface-mount.
OPA2336 come in the miniature MSOP-8 surface-mount, SO-8 surface-mount, and DIP-8 packages.
The OPA4336 package is the space-saving SSOP-16 surface-mount.
All are specified from –40°C to +85°C and operate from –55°C to +125°C.

FEATURES
* SINGLE-SUPPLY OPERATION
* RAIL-TO-RAIL OUTPUT (within 3mV)
* microPOWER: IQ = 20mA/Amplifier
* microSIZE PACKAGES
* LOW OFFSET VOLTAGE: 125mV max
* SPECIFIED FROM VS = 2.3V to 5.5V
* SINGLE, DUAL, AND QUAD VERSIONS
* SINGLE-SUPPLY, microPower

APPLICATIONS
* BATTERY-POWERED INSTRUMENTS
* PORTABLE DEVICES
* HIGH-IMPEDANCE APPLICATIONS
* PHOTODIODE PRE-AMPS
* PRECISION INTEGRATORS
* MEDICAL INSTRUMENTS
* TEST EQUIPMENT

GENERAL DESCRIPTION
 The AMS3100-1.2 are two-terminal micropower band-gap voltage reference that feature a very low dynamic impedance and good temperature coefficient, operating over a 10μA to 20mA current range.
AMS3100-1.2 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance.
The advanced process technology used, makes the AMS3100-1.2 exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application.
The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.
The extremely low power drain, makes these reference diodes useful for micropower circuitry. These voltage references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life.
Further more, the wide operating current allows it to replace older references with a tight tolerance part.
Pin to pin compatible with other standard industry references, the AMS3100-1.2 offers the advantage of long term stability at low cost.

FEATURES
* ±6 mV (±0.5%) max. initial tolerance (A grade)
* Operating Current 10mA to 20mA
* Low Voltage Reference 1.240
* Max. 0.5W Dynamic Impedance (A grade)
* Low Temperature Coefficient
* SOT-23 Package Available
* Low cost

APPLICATIONS
* Battery Powered Systems
* Instrumentation
* A/D, D/A Converters
* Temperature measurement
* Current sources
* Notebook/Personal Computer
* Monitors/ VCR/ TV
* Pagers

AMS3100-1.2AM
AMS3100-1.2BM
AMS3100-1.2CM

October 31, 2007 – National Semiconductor Corporation (NYSE:NSM) today introduced a new low-power precision comparator with integrated 2.048V reference that provides adjustable hysteresis for the highest-accuracy signal detection in power supply and battery monitors, sensor interface and threshold detectors. The LMP7300 is the latest addition to the company’s PowerWise® energy-efficient product family.

The LMP7300’s adjustable hysteresis improves the noise immunity of the comparator and prevents false readings by providing engineers the flexibility to develop precise bidirectional threshold trip points that are positive, negative, symmetric or asymmetric. In addition, the two threshold trip points are independent of one another to further simplify designs without interdependency constraints.

The comparator’s low-offset voltage of 300 uV and low supply current of 10 uA make it well-suited for precision battery-operated systems. It has a wide supply voltage range of 2.7V to 12V for use in 3.3V, 5V, and plus and minus 5V applications. A 2.048V reference voltage with 0.25 percent maximum error provides a precise input monitoring voltage reference level. The comparator’s propagation delay is less than 5 microseconds to enable fast, precise, low-power signal detection. 
 
Built on National’s proprietary VIP50 BiCMOS process technology, the LMP7300 is the latest addition to the company’s precision and low-voltage, low-power amplifier families. These amplifiers dramatically improve system accuracy and power consumption.

About National’s Amplifier Portfolio
Specializing in high-performance amplifiers and comparators, National Semiconductor offers a complete portfolio of op amps addressing the high-speed, precision, low-voltage, and low-power markets with products ranging from building-block ICs to application-specific standard products (ASSPs). The company has a long history of setting industry standards in amplifiers and continues this trend with product releases on National’s advanced VIP10 bipolar and VIP50 BiCMOS processes. National also leads the industry in packaging technology with its revolutionary Silicon Dust™ and micro SMD packaging technologies. For more information on National’s amplifier products, visit amplifiers.national.com.

Pricing and Availability
The LMP7300 is available now in an 8-pin SOIC package for $1.05 in 1,000-unit quantities. For more information and easy-to-order samples, visit http://www.national.com/pf/LM/LMP7300.html. National’s Amplifiers Made SimpleSM WEBENCH® online design tool supports a large selection of amplifiers.  To explore these solutions, visit http://webench.national.com.  To learn more about designing with amplifiers, visit our library at http://www.national.com/onlineseminar/#amps.  

Note to Editors: To view a high-resolution downloadable photo of this product, visit National's photo gallery. 

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at www.national.com.

FEATURES
* Single Inductor
* Fixed Frequency Operation with Battery Voltages Above, Below or Equal to the Output
* Synchronous Rectification: Up to 96% Efficiency
* 40μA Quiescent Current in Burst Mode® Operation
* Up to 600mA Continuous Output Current
* No Schottky Diodes Required (VOUT < 4.3V)
* VOUT Disconnected from VIN During Shutdown
* 2.5V to 5.5V Input and Output Range
* Programmable Oscillator Frequency from 300kHz to 2MHz
* Synchronizable Oscillator
* Burst Mode Enable Control
* 5 μA Shutdown Current
* Small Thermally Enhanced 10-Pin MSOP and (3mm × 3mm) DFN Packages

APPLICATIONS
* Palmtop Computers
* Handheld Instruments
* MP3 Players
* Digital Cameras

DESCRIPTION
The kB3440 is a high efficiency, fixed frequency, Buck- Boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.
The device includes two 0.19ohm N-channel MOSFET switches and two 0.22ohm P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor and the oscillator can be synchronized to an external clock. Quiescent current is only 40μA in Burst
Mode operation, maximizing battery life in portable applications.
Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled.
Other features include a 1μA shutdown, soft-start control, thermal shutdown and current limit. The kB3440 is available in the 10-pin thermally enhanced MSOP and (3mm 3mm) DFN packages.

Features
• Micropower operation
• Operation with North or South Pole
• 1.65 to 3.3V battery operation
• Chopper stabilized
• Superior temperature stability
• Extremely Low Switch-Point Drift
• Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• ESD ＞ 4KV in human body mode
• SOT553: Available in “Green” Molding Compound (no Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)

General Description
AH1883 is with two Hall effect plates and a CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 15uW in the 1.8V supply.
Either north or south pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field.
While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off.

Applications
• Cellular phone
• PDA
• Cordless phone

AH1883-Z

General Description
The AAT1217 a high efficiency, synchronous, fixed frequency, step-up converter designed for singlecell or dual-cell alkaline, NiMH, or NiCd batterypowered applications. The high 1.2MHz 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.
Pulse skipping mode operation and low quiescent current allow the AAT1217 to maintain high efficiency performance for light load and sleep mode conditions. With a 1.2A peak switch current limit, the AAT1217 is capable of delivering 100mA to the load from a single AA cell or up to 400mA from dual AA cells. The AAT1217 has a 0.85V start-up voltage with operation down to 0.5V.
The AAT1217 is available in a Pb-free, space-saving low profile (1mm) 6-pin TSOT23 package and is rated over the -40°C to +85°C ambient temperature range.

Features
• VIN Operation Range: 0.5V to VOUT
• VOUT Range: 2.5V to 5.5V
• 100mA Output from a Single AA Cell Input
• 400mA Output from a Dual AA Cell Input
• High Efficiency: Up to 93% Efficiency
• Low Start-Up Voltage: 0.85V Typical
• Internal Synchronous Rectifier
— VOUT ≤ 4.5V: No External Schottky Diode
• Fixed Frequency Pulse Width Modulation (PWM) Current-Mode Control Scheme with Internal Compensation
• 1.2MHz Fixed Switching Frequency
• 1.2A Current Limit
• Light Load Pulse Skipping Mode Operation
• Low 80μA No Load Input Current
• Over-Current Protection
• EMI Reduction Anti-Ringing Control Circuitry
• Low Shutdown Current: <1.0μA
• -40°C to +85°C Ambient Temperature Range
• Low Profile (1mm) TSOT23-6 Package

Applications
• Cellular and Smart Phones
• Digital Still and Video Cameras
• Microprocessors and DSP Core Supplies
• MP3 Player
• Portable Instruments
• Wireless and DSL Modems


AAT1217ICA-1.2-T1
AAT1217ICA-3.3-T1
AAT1217ICA-5.0-T1