7A Constant On Time Synchronous Buck Regulator with I2C Production

Features

• Pseudo frequency COT control
• Extremely fast line/load transient response
• I²C for output adjustment (3.4 Mbps)
• 1.2 MHz switching frequency
• Extremely low-R_DSON MOSFETS
• Input voltage rail 2.7V to 6V
• Up to 7A output current
• Power save mode for light-load efficiency
• UVLO, OVP, and OCP
• -40°C to 85°C ambient temperature
• Available in QFN 2mm x 3mm 14 package
• RoHS compliant

General Description
The APW7438A is a digitally controlled step-down regulator IC with an integrated 20mΩ high-side P-channel MOSFET and an 8mΩ low-side N-channel MOSFET. It features ANPEC's proprietary COT-mode control scheme for near-instantaneous correction to line/load transients for a voltage range of 2.7V to 6V, and 7A with constant frequency. The APW7438A is equipped with an automatic PFM/PWM mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses and provides high efficiency over light to heavy loads with loading-modulated frequency. The APW7438A has an I²C serial interface port for output voltage margining and monitoring, if required (it can also operate in default mode). In addition it includes robust fault monitoring functions. The APW7438A is available in 0.8V default output voltage (no voltage divider is necessary) which can be changed from 0x01 Register.

Ultra-Low On-Resistance, 6A Dual Load Switch With Soft Start

Features

• 20mΩ (Typical) On-resistance per Channel
• 6A Continuous Current
• Soft Start Time Programmable by External Capacitor
• Wide Input Voltage Range (VIN): 0.8V to 5.5V
• Supply Voltage Range (VBIAS): 3V to 5.5V
• Output Discharge when Switch Disabled
• Reverse Current Blocking when Switch Disabled
• Over-Temperature Protection
• Enable Input
• Lead Free and Green Devices Available (RoHS Compliant)

General Description
The APL3528 is an ultra-low on-resistance, dual powerdistribution switch with external soft start control. It integrates two N-channel MOSFETs that can deliver 6A continuous load current each. The device integrates over-temperature protection. The over temperature protection function shuts down the Nchannel MOSFET power switch when the junction temperature rises beyond 160^oC and will automatically turns on the power switch when the temperature drops by 40^oC. The device is available in lead free TDFN2x3-14A packages.

5.5V, 7A Low R_DSON Power Load Switch with Current Monitoring

Features

• N-CH MOSFET R_DS(ON): 12mΩ(typ.)
• Smaller than 1uA Shutdown Current
• Ultra-Low Quiescent Current: Less than 50uA
• Input Voltage Range (VIN): 0.7V ~ 5.5V
• Bias Voltage Range (VCC): 3V ~ 5.5V
• Built in Internal Charge Pump Function for Internal Gate Driver
• Built in ADJ Current Limit Function
• Built in Output Discharge Function
• Built in Adjustable Soft Start Function by SS Pin
• Built in Over-Temperature Protection
• <200ns Short-Circuitry Response Protection
• Built in Enable / Shutdown Control by EN Pin
• Built in Power Good Indication Output
• Built in IMON Function with 6% Accuracy
• Tiny Small QFN2x2-12A Package

 
General Description
The APL3535 is a power-distribution switch with some protection functions that can deliver current up to 7A. The device incorporates a 12mΩ N-channel MOSFET power switch that is controlled by an enable logic pin and has a SS pin dedicated to soft start ramp-up rate control that can be used in application where the inrush current is concerned. The APL3535 integrates some protection features, including current limit protection, over temperature protection. The current limit protection can protect down-stream devices from catastrophic failure by limiting the output current at current-limit threshold during over-load or short-circuit events. The over temperature protection function shuts down the N-channel MOSFET power switch when the junction temperature rises beyond 155°C. Other features include an accurate current monitor function. The device is available in lead free QFN2x-12A package.

Ultra-Low On-Resistance, Power Load Switch with Soft Start

Features

• Ultra-Low On-Resistance :

- R_DS(ON)=10.5mΩ at V_IN=5V
- R_DS(ON)=12mΩ at V_IN=3.6V
- R_DS(ON)=12.3mΩ at V_IN=2.5V
- R_DS(ON)=12.5mΩ at V_IN=1.8V
- R_DS(ON)=17.5mΩ at V_IN=1V

• Ultra-Low Quiescent Current: VIN=1V Condition, 10µA (Max.)
• 3A Maximum Continuous Output Current
• Supply Voltage Range from 0.95V to 5.5V
• Built in Internal Charge Pump Function for Internal Gate Driver
• Built in Internal Soft-Start Function : VIN=3.6V Condition, 800µs (Typ.)
• Built in Enable/Shutdown Control
• Built in Turn On Time : VIN=3.6V Condition, 860µs (Typ.)
• Built in Reverse Current Block Function
• Tiny small WLCSP 0.9x1.4-6 Package
• Lead Free and Green Devices Available (RoHS Compliant)

General Description
The APL3537C is an ultra-low on-resistance, power-distribution switch with internal soft start control. The device is a N-channel MOSFET which needs only one input voltage from 0.95V to 5.5V. Built in internal charge pump function biases the N-MOS switch to achieve a minimum switch on-resistance. The APL3537C can be enabled by other power system. Pulling and holding the EN pin below 0.4V shuts off the output. The device is available in lead free WLCSP 0.9x1.4-6 package.

USB Power-Distribution Switches

Features

• VIN Input Voltage Range: 4.5 to 25V
• 30V Absolute Ratings at VIN Pin
• 15A Output Current Capability
• Adjustable Soft-start Time by SS pin
• Fast Over Current Protection Response Time
• Wrong VIN Input Voltage Protection
• Fault Report on ACOK Pin
• Built-in Surge Protection when Surge Voltage over 27V
• Built-in Thermal Shutdown Protection
• Built-in Enable / Shutdown Control by DPREN Pin
• Integrated Internal Charge Pump
• Built-in Programmable Short Circuit or Over Current Protection Threshold Setting by ALSET pin
• ESD Protection:

- EC61000-4-2 contact discharge over with 8kV
- HBM with over 2kV
- CDM with over 500V at VIN pin

• Over-Temperature Protection
• TQFN4x4-24 Package

General Description
The APL3576A is designed for desktop adapter applications. The low on resistance N-channel MOSFET power switch can satisfy the voltage drop requirements of USB specification. Protection features include current-limit protection, short-circuit protection, over-temperature protection, wrong VIN input voltage protection, surge protection, and reverse current blocking. Other features include a deglitched ACOK output to indicate the fault condition and an enable input to enable or disable the device.

Stereo, Differential Input Cap-Free Line Driver

Features

• Operating Voltage : 3V~3.6V
• Differential Input
• Ground Reference Output

- No Output Capacitor Required (for DC Blocking)
- Save the PCB Space
- Reduce the BOM Costs
- Improve the Low Frequency Response

• Low Noise and THD+N

- SNR > 108dB
- Noise < 8µV_rms
- THD+N < 0.02% at 20Hz~20kHz

• Output Voltage Swing Can Reach 2.1Vrms/Ch into 2.5kΩ at V_DD=3.3V
• High PSRR : 80dB at 217Hz
• Fast Start-up Time : 500µs
• Integrate the De-Pop Circuitry
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging

- SOP-14
- TSSOP-14

• Lead Free and Green Devices Available (RoHS Compliant)

General Description
The APA2171 is a stereo, differential input, single supply, and cap-free line driver, which is available in SOP-14 and TSSOP-14 packages. The APA2171 is ground-reference output, and doesn’t need the output capacitors for DC blocking. The advantages of eliminating the output capacitor are saving the cost, eliminating component height, and improving the low frequency response. The external gain setting is recommended using from ±1V/ V to ±10V/V. High PSRR provides increased immunity to noise and RF rectification. APA2171 has shutdown and under-voltage detector function for Depop solution. The APA2171 is capable of driving 2.1V_rms at 3.3V into 2.5kΩ load, and provides short-circuit and thermal protection.

5 Buck Converters and 1 Termination LDO PMIC with I2C Interface

Features

• High Input Voltages Range from 4.5V to 16V
• Built in Input Voltage UVLO threshold
• Built in VIN OVP
• Programmable power sequence control by I2C for all channel
• Provide 5 Single-Buck PWM Converter and 1 Termination LDO Regulator
• Channel 1 Synchronous Buck for VCORE
• (Default 1V)

- 0.4V ~ 1.975V programmable with 25mV step
- 1.5A output current capability
- 750KHz / 1.5MHz switching frequency

• Channel 2 Synchronous Buck for Memory (Default 1.2V)

- 0.4V ~ 1.975V programmable with 25mV step
- 1.5A output current capability
- 750KHz / 1.5MHz switching frequency

• Channel 3 Synchronous Buck for I/O (Default 1.8V)

- 0.8V ~ 3.95V programmable with 50mV step
- 1.0A output current capability
- 750KHz / 1.5MHz switching frequency

• Channel 4 Synchronous Buck for I/O (Default 2.5V)

- 0.8V ~ 3.95V programmable with 50mV step
- 1.0A output current capability
- 750KHz / 1.5MHz switching frequency

• Channel 5 Synchronous Buck for I/O (Default 3.3V)

- 0.8V ~ 3.95V programmable with 50mV step
- 1.0A output current capability
- 750KHz / 1.5MHz switching frequency

• Channel 6 VTT Termination LDO Regulator

- 0.5A output current capability

• Built-in EN function
• Built-in RST to monitor output voltage status
• Built-in Current Limit/SCP/OVP/OTP
• VTQFN-32 4mmx4mm Thin package
• Lead Free Available (RoHS Compliant)

General Description
The APW6016E is designed for server management processor power system, which integrates 5 buck converters and one 0.5A sink/source VTT LDO into one single package. The PWM converters and VTT LDO output voltage can support VCORE, memory, memory bus termination and 1.8V/2.5V/3.3V I/O. Each VR voltage are programmable with high resolution via I2C interface. Moreover, the power-on and power-off sequences as well as soft-start time of these VR are controlled and programmable via I2C interface, providing versatility for system designers. The APW6016E provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Modulation mode (PFM), the APW6016E provides very high efficiency over light to heavy loads with loading-modulated switching frequencies. On VTQFN-32 Package, the Forced PWM Mode works nearly at constant frequency for low-noise requirements. The APW6016E features sufficient protections against over-current, over-voltage, short circuit and over temperature to prevent catastrophic failure. A Power-On- Reset function monitors the voltage on SVIN prevents wrong operation during power on. The output voltage of VTT automatically tracks the voltage of half V_OUT2. The VTT output voltage is only requiring 10µF of ceramic output capacitance for stability and fast transient response.

Three-Phase Full-wave Sine-wave Brushless Motor Driver

Features

• Three-Phase Full-Wave Sine-Wave Driver
• Sensor-Less Driver Control
• PWM Speed Control
• Minimum Speed Setting
• Power Saving Function
• Built-in 5V LDO Regulator
• Built-in Current Limit Circuit
• Built-in Over Current Protection
• Built-in Lock Protection and Auto Restart Function
• Soft Start Function
• FG, 1/2FG, RD or 1/3FG Output
• Built-in Thermal Shutdown Protection

General Description
The APX9323B is a three-phase full-wave sine-wave brushless motor drive by sensor-less. This IC built-in direct PWM input speed control, current limit and soft start features suitable for the three-phase brushless DC motors. The APX9323B is available in VTDFN3x3-10 package (see Pin Configuration).