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Part Name(s) : LTC1876 LTC1876EG Linear
Linear Technology
Description : High Efficiency, 2-Phase, Dual Synchronous STEP-DOWN SWITCHING Controller and STEP-Up REGULATOR

DESCRIPTION
The LTC®1876 is a high performance triple output SWITCHING REGULATOR. It incorporates a dual STEP-DOWN SWITCHING controller that drives all N-channelsynchronous power MOSFET stages. A STEP-up REGULATOR with an internal 1A, 36V switch provides the third output.

FEATURES
STEP-DOWN Controller
■ Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
■ Power Good Output Voltage Indicator
■ OPTI-LOOPTM Compensation Minimizes COUT
■ DC Programmed Fixed Frequency 150kHz to 300kHz
■ Wide VIN Range: 3.5V to 36V Operation
■ Very Low Dropout Operation: 99% Duty Cycle
■ Adjustable Soft-Start Current Ramping
■ Latched Short-Circuit ShutDOWN with Defeat Option
■ Remote Output Voltage Sense and OV Protection
■ 5V and 3.3V Standby REGULATORs
■ Selectable Const. Freq. or Burst ModeTM Operation

STEP-Up REGULATOR
■ High Operating SWITCHING Frequency of 1.2MHz
■ Low Internal VCESAT Switch: 400mV @ 1A, VIN = 3V
■ Wide VIN Range: 2.6V to 16V Operation
■ High Output Voltage: Up to 34V

APPLICATIONS
■ 3.3V Input STEP-DOWN Converter
■ Notebook and Palmtop Computers, PDAs
■ Battery-Operated Digital Devices

 

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Part Name(s) : LV5768M ON-Semiconductor
ON Semiconductor
Description : 1-channel STEP-DOWN SWITCHING REGULATOR

Overview
The LV5768M is a 1-channel STEP-DOWN SWITCHING REGULATOR.

Functions
• 1 channel STEP-DOWN SWITCHING REGULATOR controller.
• Frequency decrease function at pendent.
• Load-independent soft start circuit.
• ON/OFF function.
• Built-in pulse-by-pulse OCP circuit. It is detected by using ON resistance of an external MOS.
• Synchronous rectification
• Current mode control

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Part Name(s) : LV5768V SANYO
SANYO -> Panasonic
Description : 1-channel STEP-DOWN SWITCHING REGULATOR

Overview
The LV5768V is a 1-channel STEP-DOWN SWITCHING REGULATOR.

Functions
• 1 channel STEP-DOWN SWITCHING REGULATOR controller.
• Frequency decrease function at pendent.
• Load-independent soft start circuit.
• ON/OFF function.
• Built-in pulse-by-pulse OCP circuit. It is detected by using ON resistance of an external MOS.
• Synchronous rectification
• Current mode control

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Part Name(s) : LV5768M LV5768M-TLM-H SANYO
SANYO -> Panasonic
Description : 1-channel STEP-DOWN SWITCHING REGULATOR

Overview
The LV5768M is a 1-channel STEP-DOWN SWITCHING REGULATOR.

Functions
• 1 channel STEP-DOWN SWITCHING REGULATOR controller.
• Frequency decrease function at pendent.
• Load-independent soft start circuit.
• ON/OFF function.
• Built-in pulse-by-pulse OCP circuit. It is detected by using ON resistance of an external MOS.
• Synchronous rectification
• Current mode control

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Part Name(s) : PT5071 PT5071-12V PT5071A PT5071C PT5071N TI
Texas Instruments
Description : 1.5 Amp, 12V STEP-Up/STEP-DOWN Integrated SWITCHING REGULATOR

Description
The PT5071 is a 1.5-ampere rated STEP-up/STEP-DOWN Integrated SWITCHING REGULATOR (ISR) that provides a tightly regulated 12V output voltage from a 7V to 16V variable input source. This high-performance ISR has applications in systems where the input voltage straddles the desired 12V output. The REGULATOR has an adjustable output voltage and input start-up threshold, and a standby function for power conservation.

Features
• Single-Device:
   +12V Output, 7-16V Input
• 84% Efficiency
• 14-Pin Excalibur™ Package
• Output Current Limit
• Adjustable Output Voltage
• Adjustable Undervoltage Lockout
• Solderable Copper Case

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Part Name(s) : LA5779 LA5779-E SANYO
SANYO -> Panasonic
Description : Monolithic Linear IC Separately-excited STEP-DOWN SWITCHING REGULATOR(Variable Type)

Monolithic Linear IC Separately-excited STEP-DOWN SWITCHING REGULATOR(Variable Type)

Overview
The LA5779 is a Separately-excited STEP-DOWN SWITCHING REGULATOR (variable type).

Functions
•High efficiency.
•Six external parts.
•Time-base generator (160kHz) incorporated.
•Current limiter incorporated.
•Thermal shutDOWN circuit incorporated.
•ON/OFF function.

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Part Name(s) : LM2596 LM2596TADJG LM2596TVADJG LM2596DSADJG LM2596DSADJR4G ON-Semiconductor
ON Semiconductor
Description : 3.0 A, STEP-DOWN SWITCHING REGULATOR

3.0 A, STEP-DOWN SWITCHING REGULATOR

The LM2596 REGULATOR is monolithic integrated circuit ideally suited for easy and convenient design of a STEPDOWN SWITCHING REGULATOR (buck converter). It is capable of driving a 3.0 A load with excellent line and load regulation. This device is available in adjustable output version and it is internally compensated to minimize the number of external components to simplify the power supply design.
Since LM2596 converter is a switch−mode power supply, its efficiency is significantly higher in comparison with popular three−terminal linear REGULATORs, especially with higher input voltages. The LM2596 operates at a SWITCHING frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency SWITCHING REGULATORs. Available in a standard 5−lead TO−220 package with several different lead bend options, and D2PAK surface mount package.
The other features include a guaranteed 4% tolerance on output voltage within specified input voltages and output load conditions, and 15% on the oscillator frequency. External shutDOWN is included, featuring 80 A (typical) standby current. Self protection features include switch cycle−by−cycle current limit for the output switch, as well as thermal shutDOWN for complete protection under fault conditions.

Features
• Adjustable Output Voltage Range 1.23 V − 37 V
• Guaranteed 3.0 A Output Load Current
• Wide Input Voltage Range up to 40 V
• 150 kHz Fixed Frequency Internal Oscillator
• TTL ShutDOWN Capability
• Low Power Standby Mode, typ 80 A
• Thermal ShutDOWN and Current Limit Protection
• Internal Loop Compensation
• Moisture Sensitivity Level (MSL) Equals 1
• Pb−Free Packages are Available

Applications
• Simple High−Efficiency STEPDOWN (Buck) REGULATOR
• Efficient Pre−REGULATOR for Linear REGULATORs
• On−Card SWITCHING REGULATORs
• Positive to Negative Converter (Buck−Boost)
• Negative STEP−Up Converters
• Power Supply for Battery Chargers

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Part Name(s) : BD63536FJ ROHM
ROHM Semiconductor
Description : STEP-DOWN,High-frequency SWITCHING REGULATOR (Controller type)

Large Current External FET Controller Type SWITCHING REGULATORs

●Description
The BD63536FJ is a gate direct drive SWITCHING REGULATOR operational at a power supply voltage from 3V. This REGULATOR uses a compact package SOP-J8 and operates as a SWITCHING REGULATOR for the voltage control type of STEP-DOWN DC/DC converter. The REGULATOR features reliable design with 1% reference voltage accuracy, built-in current limit function (4%), and a variety of built-in protection circuits.


●Features
 1)  Gate direct drive available (External Pch FET, Vcc-5.4V)
 2)  Built-in current limit function (150mV4%)
 3) Built-in gate-off function
 4)  Error amplifier reference voltage (1.25V1%)
 5)  Built-in soft start
 6) 2.5V REGULATOR output
 7)  External oscillation frequency variable
 8)  Built-in thermal shutDOWN circuit

●Applications
Laser beam printers, MFPs, PPCs, etc.

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Part Name(s) : L5971 L5971D ST-Microelectronics
STMicroelectronics
Description : 1.5A STEP DOWN SWITCHING REGULATOR

DESCRIPTION
The L5971 is a STEP DOWN monolithic power SWITCHING REGULATOR delivering 1.5A at a voltage between 1.26V and 20V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high SWITCHING speed.

■ UP TO 1.5A STEP DOWN CONVERTER
■ OPERATING INPUT VOLTAGE FROM 6.5V TO 28V
■ PRECISE 1.26V (±1%) INTERNAL REFERENCE VOLTAGE
■ OUTPUT VOLTAGE ADJUSTABLE FROM 1.26V TO 20V
SWITCHING FREQUENCY ADJUSTABLE UP TO 500KHz
■ VOLTAGE FEEDFORWARD
■ ZERO LOAD CURRENT OPERATION
■ INTERNAL CURRENT LIMITING (PULSE-BY-PULSE AND HICCUP MODE)
■ INHIBIT FOR ZERO CURRENT CONSUMPTION
■ PROTECTION AGAINST FEEDBACK DISCONNECTION
■ THERMAL SHUTDOWN
■ SOFT START FUNCTION

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Part Name(s) : BD8301MUV BD8301MUV-E2 ROHM
ROHM Semiconductor
Description : High-efficiency STEP-up/DOWN SWITCHING REGULATOR with Built-in Power MOSFET

General Description
ROHM’s highly-efficient STEP-up/DOWN SWITCHING REGULATOR BD8301MUV produces STEP-up/DOWN output including 3.3 V from 1 cell of lithium battery with just one coil.
This IC adopts an original STEP-up/DOWN drive system and creates a higher efficient power supply than conventional Sepic-system or H-bridge system SWITCHING REGULATORs.

Features
1)  Highly-efficient STEP-up/DOWN DC/DC converter to be constructed just with one inductor.
2)  Input voltage  2.5 V - 5.5 V
3)  Output current  1 A at 3.3 V  800 mA at 5.0 V
4)  Incorporates soft-start function.
5)  Incorporates timer latch system short protecting function.
6)  High heat radiation surface mounted package  VQFN020V4040

Application
    General portable equipment likeportable audio or DSC/DVC

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