* Regulated Output with Input Above, Below or Equal to the Output
* Single Inductor, No Schottky Diodes
* High Efficiency: Up to 96%
* 28μA Quiescent Current in Burst Mode® Operation
* Up to 1.2A Continuous Output Current from a Single Lithium-Ion
* True Output Disconnect in Shutdown
* 2.4V to 5.5V Input Range
* 2.4V to 5.25V Output Range
* 600kHz Fixed Frequency Operation
* Synchronizable Oscillator
* Selectable Burst Mode or Fixed Frequency Operation
* <1μA Quiescent Current in Shutdown
* Small, Thermally Enhanced 12-Lead (4mm × 3mm × 0.8mm) DFN package

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

The LTC®3443 is a high efficiency, fixed frequency, buckboost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The part is pin for pin compatible with its predecessor, the LTC3441, with a lower operating frequency (600kHz), and a VC pin clamp circuit during Burst Mode operation. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single Lithium Ion or multicell applications where the output voltage is within the battery voltage range.
The device includes two 0.10Ω N-channel MOSFET switches and two 0.11Ω P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequency is internally set to 600kHz and can be synchronized up to 1.2MHz. Quiescent current is only 28μA 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 is driven low or with a clock, then fixed frequency switching is enabled.
Other features include a 1μA shutdown, soft-start control, thermal shutdown and current limit. The LTC3443 is available in a thermally enhanced 12-lead (4mm × 3mm) DFN Package.


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* Dual Output Boost for Dual Display Devices
* Drives Up to Six White LEDs and OLED/LCD Bias
* Internal Power Switches and Schottky Diodes
* Independent Dimming and Shutdown
* 200mV High Side Sense on LED Driver Allows
“One-Wire Current Source”
* Wide Input Voltage Range: 2.5V to 12V
* Wide Output Voltage Range: Up to 32V
* 2.3MHz PWM Frequency for LED Driver
* PFM for OLED Driver is Non-Audible Over Entire Load Range
* Open LED Protection (27V Maximum on CAP1 Pin)
* OLED Output Disconnect
* Available in 12-Pin DFN Package
* 1mm Tall Solution Height

* Cellular Phones
* PDAs, Handheld Computers
* Digital Cameras
* MP3 Players
* GPS Receivers

The LT®3498 is a dual output boost converter featuring a 2.3MHz PWM LED Driver and PFM OLED Driver. It includes an internal power switch and Schottky diode for each driver. Both converters can be independently shut down and modulated. This highly integrated power solution is ideal for dual display electronic devices.
The 2.3MHz step-up converter is designed to drive up to six white LEDs in series from a Li-Ion cell. The device features a unique high side LED current sense that enables the part to function as a “one-wire” current source—one side of the LED string can be returned to ground anywhere. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.
The PFM OLED driver is a low noise boost converter that features a novel control technique.
The converter controls power delivery by varying both the peak inductor current and switch off time. This technique results in low output voltage ripple, as well as, high effi ciency over a wide load range. The off time of the switch is not allowed to exceed a fi xed level, guaranteeing a switching frequency that stays above the audio band.

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* Internal 2A MOSFET Switch
* 1.2MHz Switching Frequency
* Integrated Soft-Start
* Low 1.6V VIN Operation
* Low RDS(ON) Switch: 100mΩ at 5V Output
* Delivers 5V at 800mA from a 3.3V Input
* Delivers 3.3V at 800mA from a 2.5V Input
* Uses Small, Low Profile External Components
* Low Profile (1mm) SOT-23 (ThinSOTTM) Package

* White LED Driver Supply
* Local 3.3V or 5V Supply
* Battery Back-Up

The LTC®3426 step-up switching regulator generates an output voltage of up to 5.5V from an input voltage as low as 1.6V. Ideal for applications where space is limited, it switches at 1.2MHz, allowing the use of tiny, low cost and low profile external components. Its internal 2A, 100mΩ NMOS switch provides high efficiency even at heavy load, while the constant frequency, current mode architecture results in low, predictable output noise that is easy to filter.
Antiringing circuitry reduces EMI concerns by damping the inductor while in discontinuous mode, and internal soft-start eases inrush current worries. Internal frequency compensation is designed to accommodate ceramic output capacitors, further reducing noise. The device features very low shutdown current of 0.5μA. The LTC3426 is available in the 6-lead SOT-23 package.



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* RF Input Frequency Range: 40MHz to 900MHz
* High IIP3: 21dBm at 800MHz
* High IIP2: 58dBm at 800MHz
* I/Q Gain Mismatch: 0.3dB Max
* I/Q Phase Mismatch: 0.7°
* Noise Figure: 12.4dB at 800MHz
* Conversion Gain: 3.3dB at 800MHz
* Baseband Bandwidth: 130MHz
* Single Ended, 50W Matched 2XLO Input
* Shutdown Mode
* 16-Lead QFN (4mm ´ 4mm) Package with Exposed Pad

* Wireless Infrastructure
* High Linearity Direct Conversion I/Q Receiver
* High Linearity I/Q Demodulator

The LT®5517 is a 40MHz to 900MHz quadrature demodulator optimized for high linearity receiver applications where high dynamic range is important. It is suitable for communications receivers where an RF or IF signal is directly converted into I and Q baseband signals with a bandwidth up to 130MHz. The LT5517 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, broadband quadrature generator derived from an on-chip divide-by-two circuit. The superior linearity and low noise performance of the LT5517 is achieved across its full frequency range. A wellbalanced divide-by-two circuit generates precision quadrature LO carriers to drive the I mixer and the Q mixer. Consequently, the outputs of the I-channel and the Q-channel are well matched in amplitude, and their phases are 90° apart. The LT5517 also provides excellent 50W impedance matching at the 2XLO port across its entire frequency range.


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■ High Efficiency: Up to 92%
■ 2-Phase Control Reduces Output Voltage Ripple
■ 5V at 2A from 3.3V Input
■ 3.3V at 1.5A from 1.8V Input
■ 1.6V to 5.25V Adjustable Output Voltage
■ 1.6V to 4.5V Input Range
■ Internal Soft-Start Operation
■ Low Shutdown Current: <1µA
■ Uses Small Surface Mount Components
■ 10-Pin 3mm × 3mm DFN Package

■ Networking Equipment
■ Handheld Instruments
■ Digital Cameras
■ Distributed Power
■ Local 3.3V to 5V Conversion

The LTC®3428 is a 2-phase, current mode boost converter, capable of supplying 2A at 5V from a 3.3V input.
Two 93mΩ, 2A N-channel MOSFET switches allow the LTC3428 to deliver high efficiency from input voltages as low as 1.6V.
External parts count and size are minimized by a 1MHz switching frequency and a 2-phase design. Two phase operation significantly reduces peak inductor currents and capacitor ripple current, doubling the effective switching frequency and minimizing inductor and capacitor size.
External compensation allows the feedback loop response to be optimized for a particular application.
Other features include: an active low shutdown pin reduces supply current to below 1µA, internal soft-start, antiringing control and thermal shutdown. The LTC3428 is available in a low profile (0.75mm) 10-lead (3mm × 3mm) DFN package.


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■ Single Supply Operation Input Voltage Range Extends to Ground Output Swings to Ground while Sinking Current
■ Guaranteed Offset Voltage: 50μV Max
■ Guaranteed Low Drift: 1.3μV/°C Max
■ Guaranteed Offset Current: 0.5nA Max
■ Guaranteed High Gain 5mA Load Current: 1.5 Million Min 17mA Load Current: 0.8 Million Min
■ Guaranteed Low Supply Current: 520μA Max
■ Supply Current can be Reduced by a Factor of 4
■ Low Voltage Noise, 0.1Hz to 10Hz: 0.55μVP-P Low Current Noise— Better than OP-07: 0.07pA/√Hz at 10Hz
■ High Input Impedance: 250MΩ Min
■ Minimum Supply Voltage: 2.7V Min

■ Low Power Sample-and-Hold Circuits
■ Battery-Powered Precision Instrumentation Strain Gauge Signal Conditioners Thermocouple Amplifiers
■ 4mA to 20mA Current Loop Transmitters
■ Active Filters

The LT®1006 is the first precision single supply operational amplifier. Its design has been optimized for single supply operation with a full set of specifications at 5V.
Specifications at ±15V are also provided. The LT1006 has a low offset voltage of 20μV, drift of
0.2μV/°C, offset current of 120pA, gain of 2.5 million, common mode rejection of 114dB and power supply rejection of 126dB.
Although supply current is only 340μA, a novel output stage can source or sink in excess of 20mA while retaining high voltage gain. Common mode input range includes ground to accommodate low ground-referenced inputs from strain gauges or thermocouples, and output can swing to within a few millivolts of ground. If a higher slew rate (in excess of 1V/μs) or micropower operation (supply current down to 90μA) is required, the operating currents can be modified by connecting an external optional resistor to Pin 8.
For similar single supply precision dual and quad op amps, please see the LT1013/LT1014 data sheet. For micropower dual and quad op amps, please see the LT1078/LT1079 data sheet.


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■ Designed Specifically to Drive Large and Small QG PFETs
■ Very Low Loss Replacement for Power Supply OR’ing Diodes
■ Wide Operating Voltage Range: 3.6V to 36V
■ –40°C to 125°C Operating Temperature Range
■ Reverse Battery Protection
■ Automatic Switching Between DC Sources
■ Low Quiescent Current: 35μA per Channel
■ Load Current Sharing
■ MOSFET Gate Protection Clamp
■ Precision Input Control Comparators for Setting Switchover Threshold Points
■ Open-Drain Feedback Points for Customer Specified Hysteresis Control
■ Minimal External Components
■ Space Saving 10-Lead MSOP Package

■ High Current PowerPath Switch
■ Industrial and Automotive Applications
■ Uninterruptible Power Supplies
■ Logic Controlled Power Switch
■ Battery Backup System
■ Emergency Systems with Battery Backups

The LTC®4416/LTC4416-1 control two sets of external P-channel MOSFETs to create two near ideal diode functions for power switchover circuits. This permits highly efficient OR’ing of multiple power sources for extended battery life and low self heating. When conducting, the voltage drop across the MOSFET is typically 25mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected.
The LTC4416 integrates two interconnected PowerPathTM controllers with soft switchover control. The “soft-off” switchover permits the users to transfer between two dissimilar voltages without excessive voltage undershoot (or VDROOP) in the output supply.
The LTC4416/LTC4416-1 also contain a “fast-on” feature that dramatically increases gate drive current when the forward input voltage exceeds 25mV.
The LTC4416 “fast off” feature is engaged when the sense voltage exceeds the input voltage by 25mV. The LTC4416-1 enables the fast off under the same conditions and when the other external P-channel device is selected using the enable pins.
The wide operating supply range supports operation from one to eight Li-Ion cells in series. The low quiescent current (35μA per channel) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.
The LTC4416/LTC4416-1 are available in low profile 10-lead MSOP packages.


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■ Monitors Two Voltages Simultaneously
■ Adjustable UV and OV Trip Values
■ Guaranteed Threshold Accuracy: ±1.5%
■ Input Glitch Rejection
■ Adjustable Reset Timeout with Disable
■ 55μA Quiescent Current
■ Open-Drain OV and UV Outputs
■ Guaranteed OV and UV for VCC ≥ 1V
■ Available in 10-Lead MSOP and (3mm × 3mm) DFN Packages


■ Desktop and Notebook Computers
■ Network Servers
■ Core, I/O Voltage Monitors


The LTC®2913 is a dual input voltage monitor intended for multiple voltages in a variety of applications. Dual inputs for each voltage allow monitoring two separate undervoltage (UV) conditions and two separate overvoltage (OV) conditions. All monitors share a common undervoltage output and a common overvoltage output. The LTC2913-1 has latching capability for the overvoltage output. The LTC2913-2 has functionality to disable both the overvoltage and undervoltage outputs.

Glitch filtering ensures reliable reset operation without false or noisy triggering.

The LTC2913 provides a precise, versatile, space-conscious, micropower solution for voltage monitoring.


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* Pin Compatible with LM111 Series Devices
* Guaranteed Max 0.5mV Input Offset Voltage
* Guaranteed Max 25nA Input Bias Current
* Guaranteed Max 3nA Input Offset Current
* Guaranteed Max 250ns Response Time
* Guaranteed Min 200,000 Voltage Gain
* 50mA Output Current Source or Sink
* ±30V Differential Input Voltage
* Fully Specified for Single 5V Operation

* SAR A/D Converters
* Voltage-to-Frequency Converters
* Precision RC Oscillator
* Peak Detector
* Motor Speed Control
* Pulse Generator
* Relay/Lamp Driver

 The LT®1011 is a general purpose comparator with significantly better input characteristics than the LM111. Although pin compatible with the LM111, it offers four times lower bias current, six times lower offset voltage and five times higher voltage gain. Offset voltage drift, a previously unspecified parameter, is guaranteed at 15mV/°C. Additionally, the supply current is lower by a
factor of two with no loss in speed. The LT1011 is several times faster than the LM111 when subjected to large overdrive conditions. It is also fully specified for DC parameters and response time when operating on a single 5V supply.

 These parametric improvements allow the LT1011 to be used in high accuracy (³12-bit) systems without trimming. In a 12-bit A/D application, for instance, using a 2mA DAC, the offset error introduced by the LT1011 is less than 0.5LSB. The LT1011 retains all the versatile features of the LM111, including single 3V to ±18V supply operation, and a floating transistor output with 50mA source/sink capability. It can drive loads referenced to ground, negative supply or positive supply, and is specified up to 50V between V– and the collector output.
A differential input voltage up to the full supply voltage is allowed, even with ±18V supplies, enabling the inputs to be clamped to the supplies with simple diode clamps.


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ㅁ Sample Rate: 100ksps
ㅁ Single 5V Supply
ㅁ Bipolar Input Range: ±10V
ㅁ Power Dissipation: 55mW Typ
ㅁ Integral Nonlinearity: ±2.0LSB Max
ㅁ Guaranteed No Missing Codes
ㅁ Signal-to-Noise Ratio: 86dB Typ
ㅁ Operates with Internal or External Reference
ㅁ Internal Synchronized Clock
ㅁ 28-Pin 0.3” PDIP, SSOP and SW Packages
ㅁ Improved 2nd Source to ADS7805 and AD976

ㅁ Industrial Process Control
ㅁ Multiplexed Data Acquisition Systems
ㅁ High Speed Data Acquisition for PCs
ㅁ Digital Signal Processing

The LTC®1605 is a 100ksps, sampling 16-bit A/D converter that draws only 55mW (typical) from a single 5V supply. This easy-to-use device includes sample-andhold, precision reference, switched capacitor successive approximation A/D and trimmed internal clock. The LTC1605’s input range is an industry standard ±10V. Maximum DC specs include ±2.0LSB INL and 16-bits no missing codes over temperature. An external reference can be used if greater accuracy over temperature is needed. The ADC has a microprocessor compatible, 16-bit or two byte parallel output port. A convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.


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