GENERAL DESCRIPTION
The ACT4012A is a current-mode step-down DC/DC converter that generates up to 1.5A output 420kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD20 process for operation with input voltages up to 20V.
Consuming only 10μA in shutdown mode, the ACT4012A is highly efficient with peak efficiency at 94% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
The ACT4012A is available in a SOP-8 package and requires very few external devices for operation.
FEATURES
*1.5A Output Current
*Up to 94% Efficiency
*Up to 20V Input Range
*10μA Shutdown Supply Current
*420kHz Switching Frequency
*Adjustable Output Voltage
*Cycle-by-Cycle Current Limit Protection
*Thermal Shutdown Protection
*Frequency Foldback at Short Circuit
*Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors
*SOP-8 Package
APPLICATIONS
*TFT LCD Monitors
*Portable DVDs
*Car-Powered or Battery-Powered Equipments
*Set-Top Boxes
*Telecom Power Supplies
*DSL and Cable Modems and Routers
*Termination Supplies
ACT4012ASH, ACT4012ASH-T
GENERAL DESCRIPTION
The ACT4070 is a current-mode step-down DC/DC converter that generates up to 3A output current at 400kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD30 process for operation with input voltage up to 30V.
Consuming only 6μA in shutdown mode, the ACT4070 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency fold back at short circuit. The device also includes an internal soft start function to prevent overshoot.
The ACT4070 is available in SOP-8/EP exposed pad package and requires very few external devices for operation.
FEATURES
*3A Output Current
*Up to 95% Efficiency
*4.5V to 30V Input Range
*6μA Shutdown Supply Current
*400kHz Switching Frequency
*Adjustable Output Voltage
*Cycle-by-Cycle Current Limit Protection
*Thermal Shutdown Protection
*Internal Soft Start Function
*Frequency Fold Back at Short Circuit
*Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors
*SOP-8/EP (Exposed Pad) Package
APPLICATIONS
*TFT LCD Monitors or Televisions and HDTV
*Portable DVD Players
*Car-Powered or Battery-Powered Equipment
*Set-Top Boxes
*Telecom Power Supplies
*DSL and Cable Modems and Routers
ACT4070YH, ACT4070YH-T
GENERAL DESCRIPTION
The ACT4060 is a current-mode step-down DC/DC converter that generates up to 2A of output current at 420kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD20 process for operation with input voltages up to 20V.
Consuming only 8μA in shutdown mode, the ACT4060 is highly efficient with peak operating efficiency at 95%. Protection features include cycle-bycycle current limit, thermal shutdown, and frequency foldback at short circuit.
The ACT4060 is available in a SOP-8 package and requires very few external devices for operation.
FEATURES
*2A Output Current
*Up to 95% Efficiency
*4.75V to 20V Input Range
*8μA Shutdown Supply Current
*420kHz Switching Frequency
*Adjustable Output Voltage
*Cycle-by-Cycle Current Limit Protection
*Thermal Shutdown Protection
*Frequency FoldBack at Short Circuit
*Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors
*SOP-8 Package
APPLICATIONS
*TFT LCD Monitors
*Portable DVDs
*Car-Powered or Battery-Powered Equipments
*Set-Top Boxes
*Telecom Power Supplies
*DSL and Cable Modems and Routers
*Termination Supplies
ACT4060SH, ACT4060SH-T
GENERAL DESCRIPTION
The patent-pending ACT8325 integrates two stepdown DC/DCs into a single, thin, space-saving package to provide a cost-effective, highly-efficient ActivePMUTM power management solution. This device is ideal for a wide range of portable handheld equipment that can benefit from the advantages of ActivePMU technology but do not require a high level of integration.
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 550mA, respectively. Both outputs are available in a wide range of factorypreset output voltage options, and an adjustable output voltage mode is also available.
The ACT8325 is available in a tiny 3mm x 3mm 10-pin Thin-DFN package that is just 0.75mm thin.
FEATURES
*Multiple Patents Pending
*Two Integrated Step-Down DC/DC Converters
-REG1: 350mA
-REG2: 550mA
*180° Out-of-Phase Operation
-Reduces Input Capacitor Requirements
*Fixed or Adjustable Output Voltage Options
*Independent Enable/Disable Control
*Minimal External Components
*3x3mm, Thin-DFN (TDFN33-10) Package
-Only 0.75mm Height
-RoHS-Compliant
APPLICATIONS
*Portable Devices and PDAs
*MP3/MP4 Players
*Wireless Handhelds
*GPS Receivers
GENERAL DESCRIPTION
The patent-pending ACT6330 integrates two stepup DC/DCs into a single, thin, space-saving package to provide a cost-effective, highly-efficient ActivePMUTM power management solution. This device is ideal for a wide range of portable handheld equipment that can benefit from the advantages of ActivePMU technology but does not require a high level of integration.
REG1 and REG2 are fixed-frequency, current-mode PWM step-up DC/DC converters. REG1 is optimized for high-efficiency WLED bias applications. REG2 is optimized for voltage regulation applications, while together these outputs can provide a complete TFT bias and backlighting solution for portable handheld equipment.
The ACT6330 is available in a tiny 3mm x 3mm 16-pin Thin-QFN package that is just 0.75mm thin.
FEATURES
*Multiple Patents Pending
*Two Integrated Regulators
-REG1: PWM Step-Up DC/DC with OVP for WLED Bias
-REG2: PWM Step-Up DC/DC Converter with OVP
*Independent Enable/Disable Control
*Minimal External Components
*3x3mm, Thin-QFN (TQFN33-16) Package
-Only 0.75mm Height
-RoHS Compliant
APPLICATIONS
*Portable Devices and PDAs
*MP3/MP4 Players
*Wireless Handhelds
*GPS Receivers
ACT6330QK-T
GENERAL DESCRIPTION
The ACT4065 is a current-mode step-down DC-DC converter that generates up to 2A output current at 200kHz switching frequency. The device utilizes Active-Semi’s proprietary ISOBCD30 process for operation with input voltage up to 28V.
Consuming only 8μA in shutdown mode, the ACT4065 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
The ACT4065 is available in SOP-8 package and requires very few external devices for operation.
FEATURES
*2A Output Current
*Up to 95% Efficiency
*Up to 28V Input Range
*8μA Shutdown Supply Current
*200kHz Switching Frequency
*Adjustable Output Voltage
*Cycle-by-Cycle Current Limit Protection
*Thermal Shutdown Protection
*Frequency Foldback at Short Circuit
*Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors
*SOP-8 Package
APPLICATIONS
*TFT LCD Monitors
*Portable DVDs
*Car-Powered or Battery-Powered Equipments
*Set-Top Boxes
*Telecom Power Supplies
*DSL and Cable Modems and Routers
*Termination Supplies
ACT4065SH, ACT4065SH-T
GENERAL DESCRIPTION
The ACT6390/ACT6391 are high-performance, fixed-frequency, current-mode PWM step-up
DC/DC converters that incorporate internal power MOSFETs. The ACT6390 includes an integrated 0.2Ω power MOSFET that supports peak currents of up to 1.7A, while the ACT6391’s integrated 0.15Ω power MOSFET supports currents of up to 2.5A.
The ACT6390 and ACT6391 both utilize simple external loop compensation and a pin-selectable
fixed-frequency of either 700kHz or 1.3MHz, allowing optimization between component size, cost, and AC performance across a wide range of applications. Additional functions include an externally programmable soft-start function for easy inrush current control, internal over-voltage protection (OVP), cycle-by-cycle current limit protection, and thermal shutdown.
Both the ACT6390 and the ACT6391 are available in the small 8-pin MSOP-8 package.
FEATURES
*Greater than 90% Efficiency
*Adjustable Output Voltage Up to 12V
*Internal 14V Power MOSFET
*Two Peak Current Options:
− ACT6390: 1.7A, 0.2Ω
− ACT6391: 2.5A, 0.15Ω
*Selectable 700kHz/1.3MHz Frequency
*Integrated Over-Voltage Protection (OVP)
*Programmable Soft-Start Function
*Thermal Shutdown
*Cycle-by-Cycle Over-Current Protection
*Small MSOP-8 Package
APPLICATIONS
*TFT LCD Monitors
*Battery-Powered Equipment
*Set-Top Boxes
*DSL and Cable Modems and Routers
ACT6391, ACT6390MH-T, ACT6391MH-T
GENERAL DESCRIPTION
The patent-pending ACT8342 is a complete, cost effective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates one PWM step-down DC/DC converter and two low noise, low dropout linear regulators (LDOs) in a single, thin, space-saving package. This device is ideal for a wide range of portable handheld equipment that can benefit from the advantages of ActivePMU technology but does not require a high level of integration.
REG1 is a fixed-frequency, current-mode PWM step-down DC/DC converter that is optimized for high efficiency and is capable of supplying up to 350mA output current. REG1’s output is available in a variety of factory-preset output voltage options, and an adjustable output voltage mode is also available. REG2, REG3 are low noise, high PSRR linear regulators that are capable of supplying up to 80mA, and 150mA, respectively.
The ACT8342 is available in a tiny 3mm × 3mm 16-pin Thin-QFN package that is just 0.75mm thin.
FEATURES
*Multiple Patents Pending
*Three Integrated Regulators
− 350mA PWM Step-Down DC/DC
− 80mA Low Noise LDO
− 150mA Low Noise LDO
*Independent Enable/Disable Control
*Minimal External Components
*3×3mm, Thin-QFN (TQFN33-16) Package
− Only 0.75mm Height
− RoHS Compliant
APPLICATIONS
*Portable Devices and PDAs
*MP3/MP4 Players
*Wireless Handhelds
*GPS Receivers, etc.
GENERAL DESCRIPTION
The ACT6308 is a high efficiency synchronous step-up DC/DC converter that consumes just 17μA of quiescent supply current using only three external components. This device achieves a typical startup voltage of just 1V, making it ideal for applications operating from 1 or 2 alkaline cells.
This device incorporates an internal synchronous rectifier, and achieves excellent peak efficiency of up to 89% and features a proprietary control scheme that ensures high efficiency over a wide load current range.
The ACT6308 features pin-selectable output voltages of 3.3V or 5V, or it can also be set externally to any voltage between 2V and 5V. The ACT6308 is available in a tiny SOT23-5 package.
FEATURES
*1V Typical Startup Voltage
*Up to 89% Efficiency
*Fully Integrated Power Stage
*Fixed 3.3V/5V or Adjustable Output Voltage
*NanoStandbyTM Shutdown Mode
*Tiny SOT23-5 Package
− RoHS Compliant Package
APPLICATIONS
*Hand-Held Devices
*One to Three Cell Battery Operated Devices
*PDAs
*Cellular Phones
*Digital Cameras
*GPS
ACT6308UC-T
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.
