ISL6545AIRZ

Series: -
PWM Type: Voltage Mode
Buck: Yes
Boost: Yes
Inverting: No
Doubler: No
Divider: No
Cuk: No
Isolated: No
Number of Outputs: 1
Duty Cycle: 100%
Operating Temperature: -40°C ~ 85°C
Packaging: Tube
Flyback: No
Package / Case: 10-VFDFN Exposed Pad
Frequency - Max: 660kHz
Manufacturer: Intersil
Voltage - Supply: 4.5 V ~ 14.4 V


Description

The ISL6545AIRZ belongs to ISL6545, which makes simple work out of implementing a complete control and protection scheme for a DC/DC stepdown converter driving N-channel MOSFETs in a synchronous buck topology. Since it can work with either 5V or 12V supplies, this one IC can be used in a wide variety of applications within a system. The ISL6545AIRZ integrates the control, gate drivers, output adjustment, monitoring and protection functions into a single 8 Ld SOIC or 10 Ld DFN package.The ISL6545AIRZ provides single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.6V, with a maximum tolerance of ±1.0% over temperature and line voltage variations. A selectable fixed frequency oscillator (ISL6545AIRZ for 300kHz; ISL6545AIRZ for 600kHz) reduces design complexity, while balancing typical application cost and efficiency. The error amplifier features a 20MHz gain-bandwidth product and 9V/s slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%. Protection from overcurrent conditions is provided by monitoring the rDS(ON) of the lower MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.

The features of ISL6545AIRZ can be summarized as (1)operates from +5V or +12V supply voltage (for bias): 1.0V to 12V VIN Input Range (up to 20V possible with restrictions; see input voltage considerations); 0.6V to VIN output range; integrated gate drivers use VCC (5V to 12V); 0.6V internal reference; ±1.0% tolerance; (2)simple single-loop control design: voltage-mode PWM control; drives N-channel MOSFETs; (3)fast transient response: high-bandwidth error amplifier; full 0% to 100% duty cycle; (4)lossless, programmable overcurrent protection: uses lower MOSFET's rDS(ON); (5)small converter size in 8 Ld SOIC or 10 Ld DFN: 300kHz or 600kHz fixed frequency oscillator; fixed internal soft-start, capable into a pre-biased ; (6)load: integrated boot diode; enable/shutdown function on COMP/SD Pin; output current sourcing and sinking; (7)Pb-Free plus anneal available (RoHS compliant).

The maximum absolute ratings of ISL6545AIRZ are (1)supply voltage, VCC :GND - 0.3V to 15V; (2)BOOT voltage, VBOOT:GND - 0.3V to 36V; (3)UGATE voltage VUGATE: VPHASE - 0.3V to VBOOT + 0.3V; (4)LGATE/OCSET voltage, VLGATE/OCSET GND:- 0.3V to VCC + 0.3V; (5)PHASE voltage, VPHASE:GND - 0.3V to VBOOT + 0.3V; (6)upper driver supply voltage, VBOOT - VPHASE:15V; (7)clamp voltage, VBOOT - VCC:24V; (8)FB, COMP/SD voltage:GND - 0.3V to 6V; (9)ESD classification, HBM:1.5kV; (10)ESD classification, MM:150V; (11)ESD classification, CDM:1.0kV; (12)supply voltage, VCC:+5V ±10%, +12V ±20%, or 6.5V to 14.4V; (13)ambient temperature range ISL6545C, ISL6545AC:0°C to +70°C; ISL6545I, ISL6545AI :-40°C to +85°C; (14)junction temperature range:-40°C to +125°C; (15)maximum junction temperature (plastic package):+150°C; (16)maximum storage temperature range: -65°C to +150°C; (17)maximum lead temperature(soldering 10s):+300°C(SOIC - lead tips only).

Parameters:

Technical/Catalog Information	ISL6545AIRZ
Vendor	Intersil
Category	Integrated Circuits (ICs)
PWM Type	Voltage Mode
Number of Outputs	1
Package / Case	10-DFN
Packaging	Tube
Duty Cycle	100%
Voltage - Supply	1 V ~ 15 V
Frequency-Max	660kHz
Buck	Yes
Boost	Yes
Flyback	No
Inverting	No
Doubler	No
Divider	No
Cuk	No
Isolated	No
Drawing Number	*
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	ISL6545AIRZ ISL6545AIRZ