DESCRIPTION
The LT®1373 is a low supply current high frequency current mode switching regulator.
It can be operated in all standard switching configurations including boost, buck, flyback, forward, inverting and “Cuk.”
A 1.5A high efficiency switch is included on the die, along with all oscillator, control and protection circuitry.
All functions of the LT1373 are integrated into 8-pin SO/PDIP packages.
Compared to the 500kHz LT1372, which draws 4mA of quiescent current, the LT1373 switches at 250kHz, typically consumes only 1mA and has higher efficiency.
High frequency switching allows for small inductors to be used.
All surface mount components consume less than 0.6 square inch of board space.
New design techniques increase flexibility and maintain ease of use.
Switching is easily synchronized to an external logic level source.
A logic low on the shutdown pin reduces supply current to 12mA.
Unique error amplifier circuitry can regulate positive or negative output voltage while maintaining simple frequency compensation techniques.
Nonlinear error amplifier transconductance reduces output overshoot on start-up or overload recovery.
Oscillator frequency shifting protects external components during overload conditions.


FEATURES
*1mA IQ at 250kHz
*Uses Small Inductors: 15mH
*All Surface Mount Components
*Only 0.6 Square Inch of Board Space
*Low Minimum Supply Voltage: 2.7V
*Constant Frequency Current Mode
*Current Limited Power Switch: 1.5A
*Regulates Positive or Negative Outputs
*Shutdow*Supply Current: 12mA Typ
*Easy External Synchronization
*8-Pi*SO or PDIP Packages

APPLICATIOUS
*Boost Regulators
*CCFL Backlight Driver
*Laptop Computer Supplies
*Multiple Output Flyback Supplies
*Inverting Supplies

LT1373CN8
LT1373HVCN8
LT1373CS8

 

LT1373-250kHz Low Supply Current High Efficiency 1.5A Switching Regulator

DESCRIPTION
The SP432 is low-voltage three-terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges.
Output voltage can be set to any value between VREF (1.24V) and 20V with two external resistors.
These devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making the SP432 excellent replacements for low-voltage Zener diodes in many applications, including onboard regulation and adjustable power supplies.

FEATURES
*Low-Voltage Operation --- Down to 1.24 V
*Adjustable Output Voltage, VO = Vref to 20 V
*Low Operational Cathode Current --- 80uA ( Typ)
*0.25Ω Typical Output Impedance

APPLICATIONS
*Battery Power Equipment
*Linear Regulators
*Switch Power Supply
*Cellular Phone
*Digital Cameras
*Computer Disk Drivers
*Instrumentation

SP432AS23RG
SP432BS23RG

 

SP432-Low Voltage Adjustable Precision Shunt Regulators

GENERAL DESCRIPTION
The patent-pending ACT8700 is a complete, costeffective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment.
This device integrates two step-down DC/DC converters, one stepup DC/DC converter with over-voltage protection(OVP) for WLED bias, and a full-featured, linearmode Li+ battery charger-into a single, thin, spacesaving package.
REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are optimized for high efficiency and are capable of supplying up to 350mA and 500mA, respectively. REG3 is a fixed-frequency, step-up DC/DC converter that safely and efficiently biases a string of up to seven white-LEDs for backlighting.
The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery.
The ACT8700 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin.

FEATURES
*Multiple Patents Pending
*Li+ Battery Charger with Integrated MOSFET
-ON/OFF Control and Status Indication
*Three Integrated Regulators
-350mA PWM Step-Down DC/DC
-500mA PWM Step-Down DC/DC
-Step-Up DC/DC with OVP for WLED Bias
*Minimal External Components
*4x4mm, Thin-QFN (TQFN44-24) Package
-Only 0.75mm Height
-RoHS Compliant

APPLICATIONS
*Portable Devices and PDAs
*Digital Media Players
*Battery Operated Devices
*GPS Receivers, etc.  

ACT8700 - Four Channel Integrated Power Management IC for Handheld Portable Equipment

Device Description
A range of silicon varactor diodes for use in frequency control and filtering.
Featuring closely controlled CV characteristics and high Q.
Low reverse current ensures very low phase noise performance.
Available in single or dual common cathode format in a wide rage of miniature surface mount packages.

Features
* Close tolerance C-V characteristics
* Octave tuning from 0 to 6V
* Low IR (typically 200pA)
* Excellent phase noise performance
* High Q

Applications
* VCXO and TCXO
* Wireless communications
* Pagers
* Mobile radio

ZMV930
ZC930TA
ZC931TA

 

ZC930 - SILICON 12V HYPERABRUPT VARACTOR DIODES

Description
The low thermal droop of this device allows baseband video transmission with minimum distortion.
The double-lens optical system provides for optimum coupling of power into the fiber.
It matches with the MF446 PIN Photodiode.

Features
* 780nm Surface-Emitting LED
* 55MHz Bandwidth
* Designed for 62.5/125μm fiber
* Low thermal droop

Applications
* Baseband Video
* Sensors
* General Purpose

MF359 ST
MF359 SMA

 

MF359 - 780nm - 55MHz High Performance LED