Point-of-load regulators output sub-1V, up to 14A
Five synchronous buck regulators step-down 12V rails to point-of load inputs as low as 0.6V for MCUs, FPGAs, memory and peripheral I/Os. The latest members of the ISL850xx family are the ISL85014, ISL85012, ISL85009, ISL85005A and ISL85005 buck regulators. They deliver 14A, 12A, 9A and 5A of continuous output current, respectively.
The regulators accept input voltage of 3.8V to 18V with a wide output current range. The pin compatible regulators integrate very low RDSon high side and low side MOSFETs. Both FETs also provide current limit and reverse current limit. The high efficiency ISL850xx devices enable lower die temperatures, allowing systems to operate without cooling fans or heatsinks. Their internal compensation eliminates additional external components.
The ISL85014 is offered in a small 14A packages at 3.5 x 3.5 mm. The ISL85009 is one of the industry’s most power efficient 9A sync buck regulators, with high side FET RDSon at 17 mΩ and low side FET RDSon of 8.5 mΩ. The pin-compatible ISL85014, ISL85012 and ISL85009 address high load current applications, while the 5A ISL85005A and ISL85005 buck switching regulators are pin-compatible with the previously released 3A ISL85003A and ISL85003 devices.
The ISL850xx 12V sync buck regulators in 12-lead DFN and 15-lead TQFN packages cost from $0.75 to $2.35 (1000).
Intersil; www.intersil.com/12v-buck-regulators
A video clip is at; www.intersil.com/en/tools/videos/12v-switching-regulators-video.html
next page; feature listing…
Features and specifications of ISL85014, ISL85012 and ISL85009
• 3.8V to 18V input voltage range, and up to 9A, 12A and 14A output loads
• Output voltage is adjustable to as low as 0.6V
• Pre-bias start-up with internal 3 msec soft-start
• Selectable switching frequency of 300 kHz or 600 kHz, and external sync up to 1 MHz
• Peak current mode control with thermally compensated current limit and internal or external compensation options
• Full protection includes input/output overvoltage, integrated bootstrap diode with undervoltage detection, and selectable overcurrent protection (OCP) schemes including hiccup and latch-off
Features and specifications of ISL85005A and ISL85005
• 4.5V to 18V input voltage range, and up to 5A output load
• Output voltage is adjustable to as low as 0.8V
• Integrated bootstrap diode with undervoltage detection
• Current mode control with internal or external compensation options
• Default switching frequency internally set 500 kHz
• ISL85005 has internal 2.3 msec soft-start; ISL85005A has programmable soft-start to limit inrush current during startup
• Full protection includes output Power-Good (PG) indicator, HS cycle-by-cycle current limit, LS forward and reverse OCP, thermal shutdown, input undervoltage lockout (UVLO), and input and output overvoltage protection
|
Device |
Output Current |
Input Supply |
Package |
Price $USD (1k units) |
|
14A |
3.8V to 18V |
3.5mm x 3.5mm, 15-L TQFN |
$2.35 |
|
|
12A |
3.8V to 18V |
3.5mm x 3.5mm, 15-L TQFN |
$2.25 |
|
|
9A |
3.8V to 18V |
3.5mm x 3.5mm, 15-L TQFN |
$1.50 |
|
|
5A |
4.5V to 18V |
3mm x 4mm, 12-pin DFN |
$0.77 |
|
|
5A |
4.5V to 18V |
3mm x 4mm, 12-pin DFN |
$0.75 |
Designers can use Intersil’s PowerCompass tool to identify the ISL850xx regulators and other parts that match their specific requirements, set up multiple rails that also support FPGAs or processors, perform high-level system analysis, and generate custom reference design files.
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