ACT4060BSH-T

ACT4060BSH-T Datasheet


ACT4060B

Part Datasheet
ACT4060BSH-T ACT4060BSH-T ACT4060BSH-T (pdf)
Related Parts Information
EA4060BSH EA4060BSH EA4060BSH
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ACT4060B
18V/2A Step-Down DC/DC Converter
• 2A Output Current
• Wide 4.5V to 18V Operating Input Range
• Synchronous Buck Topology
• Integrated Power MOSFET Switches
• Output Adjustable from 0.923V to 12V
• Up to 96% Efficiency
• Stable with Low ESR Ceramic Output

Capacitors
• Internal Soft Start
• 1.5mA Low Standby Input Current
• High Light Load Efficiency
• Cycle-by-Cycle Over Current Limit
• Input Under Voltage Lockout
• Hiccup Protection at Short Circuit and Over

Current
• Low Power Loss at Output Short
• Frequency Fold Back Protection
• Low Power Dissipation at Over Current and

Short Circuit
• LCD-TV
• Set-top Box
• Distributed Power Systems
• Networking Systems

ACT4060B is a monolithic synchronous buck regulator. The device integrates two MOSFETs, and provides 2A of continuous load current over a wide input voltage of 4.5V to 18V. Current mode control provides fast transient response and cycle-by-cycle current limit. Hiccup at short circuit reduces IC temperatures.

An internal soft-start prevents inrush current at turnon, and in shutdown mode the supply current drops to 10uA. Pulse-skipping mode at light load reduces standby power down to 1.5mA.

This device, available in an 8-pin SOP package, provides a very compact solution with minimal external components.

Innovative PowerTM

ACT4060B-001

Efficiency %

Efficiency vs. Load Current
95 VIN = 7V 90

VIN = 18V

VIN = 12V
55 10

VOUT = 5V
1000
10000

Load Current mA

Copyright 2012 Active-Semi, Inc.

ACT4060B
ORDERING INFORMATION

PART NUMBER OPERATION TEMPERATURE RANGE

ACT4060BSH-T
-40°C to 85°C

PACKAGE

SOP-8

PINS

PACKING

TAPE & REEL

PIN CONFIGURATION

PIN DESCRIPTIONS

NAME

High-Side Bias Input. This pin acts as the positive rail for the high-side switch's gate driver. Connect a 10nF or greater capacitor between HSB and SW pins.

Input Supply. Bypass this pin to GND with a low ESR capacitor. Drive IN with a 4.5V to 18V power source. See Input Capacitor in the Application Information section.

Switch Output. Connect this pin to the switching end of the external inductor. Note that a capacitor is required from SW to HSB to power the high-side switch.

Ground.

Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a
resistive voltage divider from the output voltage. The feedback threshold is 0.923V.

See Setting the Output Voltage.

COMP

Compensation Node. COMP is used to compensate the regulation control loop. See Compensation Components.

Enable Input. When higher than 2.5V, this pin turns the IC on. When lower than 2.3V,
this pin turns IC off. When left unconnected, EN is pulled up to logic HIGH with a 2µA
pull-up current. EN is a digital input that turns the regulator on or off.

Not connected.

Innovative PowerTM

Copyright 2012 Active-Semi, Inc.

ABSOLUTE MAXIMUM RATINGSc

PARAMETER

IN to GND SW to GND HSB to GND FB, EN, COMP to GND Continuous SW Current Junction to Ambient Thermal Resistance Maximum Power Dissipation Operating Junction Temperature Storage Junction Lead Temperature Soldering 10 sec.

VALUE
to + 20 -1 to VIN + 1 VSW - to VSW + 6
to + 6 Internally limited
105 -40 to 150 -55 to 150 300

UNIT
c Do not exceed these limits to prevent damage to the device. Exposure to Absolute Maximum Rating conditions for long periods may affect device reliability.

Innovative PowerTM

Copyright 2012 Active-Semi, Inc.

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = 25°C, unless otherwise specified.

PARAMETER
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Datasheet ID: ACT4060BSH-T 522385