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L6730B

Adjustable step-down controller with synchronous rectification; High current embedded drivers\nSoft-start and inhibit\nSelectable uvlo threshold (5 V or 12 V BUS)\nPredictive anti-cross conduction control\nSwitching frequency programmable from 100 kHz to 1 MHz\nProgrammable high-side and low-side RDS(on) sense overcurrent protection\nPre-bias start up capability (L6730)\nMaster/slave synchronization with 180° phase shift\nSelectable source/sink or source only capability after soft-start (L6730)\nPower Good output with programmable delay\nSelectable constant current or hiccup mode overcurrent protection after soft-start (L6730B)\nThermal shut-down\nOvervoltage protection with selectable latched/not-latched mode\nPackage: HTSSOP20\nSelectable 0.6 V or 1.2 V internal voltage reference\n0% to 100% duty cycle\nInput voltage range from 1.8 V to 14 V\nAdjustable output voltage down to 0.6 V with ±0.8% accuracy over line voltage and temperature (0°C~125°C)\nSupply voltage range from 4.5 V to 14 V\nt\nON lower than 100 ns\nExternal input voltage reference\nFixed frequency voltage mode control\n;

The controller is an integrated circuit designed using BiCMOS-DMOS, v5 (BCD5) technology that provides complete control logic and protection for high performance, stepdown DC/DC and niPOL converters.\nIt is designed to drive N-Channel MOSFETs in a synchronous rectified buck converter topology. The output voltage of the converter can be precisely regulated down to 600 mV, with a maximum tolerance of ±0.8%, or to 1.2 V, when one of the internal references is used.\nIt is also possible to use an external reference from 0 V to 2.5 V.\nThe input voltage can range from 1.8 V to 14 V, while the supply voltage can range from 4.5 V to 14 V. High peak current gate drivers provide for fast switching to the external power section and the output current can be in excess of 20 A, depending on the number of the external MOSFETs used. The PWM duty cycle can range from 0% to 100% with a minimum on-time (TON(MIN)) lower than 100 ns, making conversions with a very low duty cycle and very high switching frequency possible.\nThe device provides voltage-mode control. It includes a 400 kHz free-running oscillator that is adjustable from 100 kHz to 1 MHz. The error amplifier features a 10 MHz gain-bandwidthproduct and 5 V/μs slew-rate that permits to realize high converter bandwidth for fast transient response. The device monitors the current by using the RDS(ON) of both the highside and low-side MOSFET(s), eliminating the need for a current sensing resistor and guaranteeing an effective over current-protection in all the application conditions. When necessary, two different current limit protections can be externally set through two external resistors. A leading edge adjustable blanking time is also available to avoid false overcurrent- protection (OCP) intervention in every application condition.\nIt is possible to select the HICCUP mode or the constant current protection (L6730B) after the soft-start phase.\nDuring this phase constant current protection is provided. It is possible to select the sinksource or the source-only mode capability (before the device powers on) by acting on a multifunction pin (L6730). The L6730 disables the sink mode capability during the soft-start in order to allow a proper start-up also in pre-biased output voltage conditions. The L6730B can always sink current and, so it can be used to supply the DDR memory BUS termination.\nOther features include Master-Slave synchronization (with 180° phase shift), Power-Good with adjustable delay, over voltage-protection, feed back disconnection, selectable UVLO threshold (5 V and 12 V Bus), and thermal shutdown. The HTSSOP20 package allows the realization for very compact DC/DC converters.\n

L6730B

Adjustable step-down controller with synchronous rectification

L6730B

Adjustable step-down controller with synchronous rectification

L6730B

Package：20-TSSOP（0.173"，4.40mm 寬）裸露焊盤；包裝：卷帶（TR） 功能：降壓 類別：集成電路（IC） PMIC - 穩(wěn)壓器 - DC DC 開關(guān)式控制器 描述：IC REG CTRLR BUCK 20TSSOP

L6730B

Package：20-TSSOP（0.173"，4.40mm 寬）裸露焊盤；包裝：卷帶（TR） 功能：降壓 類別：集成電路（IC） DC-DC 開關(guān)控制器 描述：IC REG CTRLR BUCK 20TSSOP

L6730BTR

Adjustable step-down controller with synchronous rectification

L6730BTR

Adjustable step-down controller with synchronous rectification

L6730BTR

Package：20-TSSOP（0.173"，4.40mm 寬）裸露焊盤；包裝：卷帶（TR） 功能：降壓 類別：集成電路（IC） PMIC - 穩(wěn)壓器 - DC DC 開關(guān)式控制器 描述：IC REG CTRLR BUCK 20TSSOP