Description
BD95710MUV is a dual-phase switching regulator controller with high output current which can achieve low output voltage (0.4V ~ 3.3V) from AC/DC 5V or 12V. High efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. A new technology called H3RegTM is a Rohm proprietary control method to realize ultra high transient response against load change without phase compensation capacitance and resistance. For various applications, it is available to select the 3 types of N-MOSFET gate drive voltage (12V: for drive ability, 8V: for intermediate drive ability, 5V: for small real estate).

Features
*H3Reg™ switching Regulator Controller without phase compensation capacitance and resistance
*Ultra High Tolerance Internal Reference Voltage (+/- 1%)
*Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Adjustable Over Current Protection (OCP), Over Voltage Protection (OVP), Short Circuit protection(SCP) built-in
*Soft start function to minimize rush current during startup
*switching Frequency Variable (f=200kHz~1000kHz)
*Internal Bootstrap Diode
*High Tolerance Current Balance Function
*VQFN024V4040 Package (4.0mm x 4.0mm x 1.0mm)
*Integrated 1-/2-phase switching Function

Applications
Graphic Cards, Desktop PC, Gaming Equipments, Digital Components

BD95710MUV-E2

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Description
The MC34066/MC33066 are high performance resonant mode controllers designed for off–line and dc–to–dc converter applications that utilize frequency modulated constant on–time or constant off–time control. These integrated circuits feature a variable frequency oscillator with programmable deadtime, precision retriggerable one–shot timer, temperature compensated reference, high gain wide–bandwidth error amplifier with a precision output clamp, steering flip–flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. Also included are protective features consisting of a high speed fault comparator and latch, programmable soft–start circuitry, input undervoltage lockout with selectable thresholds, and reference undervoltage lockout. These devices are available in dual–in–line and surface mount packages.

Features
*Variable Frequency Oscillator with a Control Range Exceeding 1000:1
*Programmable Oscillator Deadtime Allows Constant Off–Time Operation
*Precision Retriggerable One–Shot Timer
*Internally Trimmed Bandgap Reference
*5.0 MHz Error Amplifier with Precision Output Clamp
*Dual High Current Totem Pole Outputs
*Selectable Undervoltage Lockout Thresholds with Hysteresis
*Enable Input
*Programmable Soft–Start Circuitry
*Low Startup Current for Off–Line Operation

MC33066, MC34066DW, MC34066P, MC33066DW, MC33066P

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General Description
The MAX1907A/MAX1981A are single-phase, Quick-PWM™ master controllers for IMVP-IV™ CPU core supplies. Multi-phase operation is achieved using a Quick-PWM slave controller (MAX1980). Multiphase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties. The MAX1907A/MAX1981A include active voltage positioning with adjustable gain and offset, reducing power dissipation and bulk output capacitance requirements.
The MAX1907A/MAX1981A are intended for two different notebook CPU core applications: either bucking down the battery directly, or 5V system supply to create the core voltage. The single-stage conversion method allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery) at higher switching frequency provides the minimum possible physical size.
The MAX1907A/MAX1981A meet the IMVP-IV specifications and include logic to interface with the CPU power good signals from the VCCP and VCCMCH rails within the system. The regulator features power-up sequencing, automatically ramping up to the Intel-specified boot voltage. The MAX1907A/MAX1981A feature independent four-level logic inputs for setting the boot voltage (B0–B2) and the suspend voltage (S0–S2).
The MAX1907A/MAX1981A include output undervoltage protection, thermal protection, and system power-OK (SYSPOK) input/output. When any of these protection features detect a fault, the MAX1907A/MAX1981A immediately shut down. Additionally, the MAX1907A includes overvoltage protection.
The MAX1907A/MAX1981A are available in a thin 40-pin QFN package.

Features
*Quick-PWM Master Controllers
*Multiphase Conversion with Slave Controller (MAX1980)
*Active Voltage Positioning with Adjustable Gain and Offset
*Adjustable Slew Rate Control
*±0.75% VOUT Accuracy Over Line, Load, and Temperature
*6-Bit On-Board DAC (16mV Increments)
*0.700V to 1.708V Output Adjust Range
*Selectable 200kHz/300kHz/550kHz/1000kHz Switching Frequency
*2V to 28V Battery Input Voltage Range
*Drive Large Synchronous Rectifier MOSFETs
*Output Overvoltage Protection (MAX1907A Only)
*Undervoltage and Thermal Fault Protection
*Power Sequencing and Selectable Boot Voltage
*Low-Profile 40-Pin Thin QFN, 6mm ✕ 6mm Package

Applications
*IMVP-IV™ Notebook Computers
*Single-Phase CPU Core Supply
*Multiphase CPU Core Supply
*Voltage-Positioned Step-Down Converters
*Servers/Desktop Computers

MAX1981A, MAX1907AETL, MAX1981AETL

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General Description
The MAX8741/MAX8742 are buck-topology, step-down, switch-mode, power-supply controllers that generate logic-supply voltages in battery-powered systems. These high-performance, dual/triple-output devices include onboard power-up sequencing, power-good signaling with
delay, digital soft-start, secondary winding control, lowdropout circuitry, internal frequency-compensation networks, and automatic bootstrapping.
Up to 97% efficiency is achieved through synchronous rectification and Maxim’s proprietary Idle Mode™ control scheme. Efficiency is greater than 80% over a 1000:1 load-current range, which extends battery life in system suspend or standby mode. Excellent dynamic response corrects output load transients within five clock cycles.
Strong 1A on-board gate drivers ensure fast external n-channel MOSFET switching.
These devices feature a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode. This reduces noise and RF interference in sensitive mobile communications and pen-entry applications.
Asserting the SKIP pin enables fixed-frequency mode, for lowest noise under all load onditions.
The MAX8741/MAX8742 include two PWM regulators, adjustable from 2.5V to 5.5V with fixed 5.0V and 3.3V modes. All these devices include secondary feedback regulation, and the MAX8742 contains a 12V/120mA linear regulator. The MAX8741 includes a secondary feedback
input (SECFB), plus a control pin (STEER) that selects which PWM (3.3V or 5V) receives the secondary feedback signal. SECFB provides a method for adjusting the secondary winding voltage regulation point with an external resistor-divider, and is intended to aid in creating
auxiliary voltages other than fixed 12V.
The MAX8741/MAX8742 contain internal output overvoltage- and undervoltage-protection features.

Features
*97% Efficiency
*4.2V to 30V Input Range
*2.5V to 5.5V Dual Adjustable Outputs
*Selectable 3.3V and 5V Fixed or Adjustable Outputs (Dual Mode™)
*12V Linear Regulator
*Adjustable Secondary Feedback (MAX8741)
*5V/50mA Linear-Regulator Output
*Precision 2.5V Reference Output
*Programmable Power-Up Sequencing
*Power-Good (RESET) Output
*Output Overvoltage Protection
*Output Undervoltage Shutdown
*333kHz/500kHz Low-Noise, Fixed-Frequency Operation
*Low-Dropout, 98% Duty-Factor Operation
*2.5mW Typical Quiescent Power (12V Input, Both SMPSs On)
*4μA Typical Shutdown Current

Applications
*Notebook and Subnotebook Computers
*PDAs and Mobile Communicators
*Desktop CPU Local DC-DC Converters

MAX8741EAI, MAX8741ETJ, MAX8742EAI, MAX8742ETJ

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OVERVIEW
The C2472, C2473 and C2474 controllers use CamSemi’s Resonant Discontinuous Forward Converter (RDFC) topology to create a high efficiency, low cost alternative to line-frequency transformer PSUs.
By operating in resonant mode, EMI is greatly reduced, enabling the replacement of linear PSUs in demanding applications such as audio products and cordless phone chargers.
The C2472, C2473 and C2474 controllers also offer overload protection which is usually associated with more expensive switch mode solutions.

FEATURES
* Highly integrated CMOS controller IC
* Low cost package options
* Drive suitable for low cost bipolar power transistors
* Resonant switching for high efficiency and low EMI
* Frequency optimised for power circuit parasitics
* Protection against overload, over-temperature and under-voltage

APPLICATIONS
External AC/DC charger/adaptor (single voltage input) e.g. cordless phones, portable electric tools.
Embedded PSU (single voltage input) e.g. set-top boxes, DVD players, audio products, domestic appliances.

ADVANTAGES
* Low system component count
* High average efficiency
* Low standby power consumption
* EMI compliance without extra components
* High isolation & surge voltage withstand
* High power density in very small size

C2472PX2-TR7
C2472PX2-TR13
C2473PX1-TR7
C2473PX1-TR13
C2474PW1-T1

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OVERVIEW
 The C2471 controllers use CamSemi’s low power Resonant Discontinuous Forward Converter (RDFC) topology to create a high efficiency, low cost alternative to line-frequency transformer PSUs, for applications up to 6 W.
By operating in resonant mode, EMI is greatly reduced, enabling the replacement of linear PSUs
in demanding applications such as audio products and cordless phone chargers.
The C2471 controllers also offer overload protection which is usually associated with more expensive switch mode solutions.

FEATURES
* Highly integrated CMOS controller IC
* Low cost package options
* Drive suitable for low cost bipolar power transistors
* Resonant switching for high efficiency and low EMI
* Frequency optimised for power circuit parasitics
* Protection against overload, over-temperature and under-voltage

APPLICATIONS
* External AC/DC charger/adapter (single voltage input) e.g. cordless phones, low power adapters.
* Embedded PSU (single voltage input), audio products, domestic appliances.

ADVANTAGES
* Low system component count
* High average efficiency
* Low no load power consumption
* EMI compliance without extra components
* High isolation & surge voltage withstand
* High power density in very small size

C2471LX2-TR7
C2471LX2-TR13
C2471LW1-T1

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High-Performance Modified RISC CPU:
• Modified Harvard architecture
• C compiler optimized instruction set architecture
• Flexible addressing modes
• 84 base instructions
• 24-bit wide instructions, 16-bit wide data path
• Up to 144 Kbytes on-chip Flash program space
• Up to 48K instruction words
• Up to 8 Kbytes of on-chip data RAM
• Up to 4 Kbytes of nonvolatile data EEPROM
• 16 x 16-bit working register array
• Up to 30 MIPs operation:
- DC to 40 MHz external clock input
- 4 MHz-10 MHz oscillator input with PLL active (4x, 8x, 16x)
• Up to 41 interrupt sources:
- 8 user selectable priority levels
- 5 external interrupt sources
- 4 processor traps

DSP Features:
• Dual data fetch
• Modulo and Bit-Reversed modes
• Two 40-bit wide accumulators with optional saturation logic
• 17-bit x 17-bit single-cycle hardware fractional/ integer multiplier
• All DSP instructions are single cycle
- Multiply-Accumulate (MAC) operation
• Single-cycle ±16 shift

Peripheral Features:
• High-current sink/source I/O pins: 25 mA/25 mA
• Five 16-bit timers/counters; optionally pair up 16-bit timers into 32-bit timer modules
• 16-bit Capture input functions
• 16-bit Compare/PWM output functions:
• Data Converter Interface (DCI) supports common audio Codec protocols, including I2S and AC’97
• 3-wire SPI™ modules (supports 4 Frame modes)
• I2C™ module supports Multi-Master/Slave mode and 7-bit/10-bit addressing
• Two addressable UART modules with FIFO buffers
• Two CAN bus modules compliant with CAN 2.0B standard

Analog Features:
• 12-bit Analog-to-Digital Converter (ADC) with:
- 200 Ksps conversion rate
- Up to 16 input channels
- Conversion available during Sleep and Idle
• Programmable Low-Voltage Detection (PLVD)
• Programmable Brown-out Detection and Reset generation

Special Microcontroller Features:
• Enhanced Flash program memory:
- 10,000 erase/write cycle (min.) for industrial temperature range, 100K (typical)
• Data EEPROM memory:
- 100,000 erase/write cycle (min.) for industrial temperature range, 1M (typical)
• Self-reprogrammable under software control
• Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
• Flexible Watchdog Timer (WDT) with on-chip low-power RC oscillator for reliable operation

dsPIC30F6011A
dsPIC30F6012A
dsPIC30F6013A
dsPIC30F6014A

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