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new products
• Integrated Power N-MOSFETs (60mΩ Top & 30mΩ
Bottom)
• Adjustable Switching Frequency: 400kHz to 4MHz
• VIN Range: 4V to 15V
• Current Mode Operation for Excellent Line & Load
Transient Response
• Shutdown Mode Draws Less Than 1µA Supply Current
• Thermally Enhanced, 24-Lead 3mm × 5mm QFN
Package
Pricing shown is for budgetary use only and may differ
due to local duties, taxes, fees and exchange rates.
Photo : 15V, ±5A Monolithic Synchronous Step-Down
Regulator Offers Outputs to 0V
Intersil Introduces High Efficiency, High
Current Buck-Boost Regulators for Battery-
Powered Portables
Up to 96% efficiency and industry’s lowest quiescent
current makes new ISL91127 and ISL91128 ideal for
low-voltage, battery-operated systems
Milpitas, Calif., Aug. 15, 2016 – Intersil Corporation
(NASDAQ: ISIL), a leading provider of innovative power
management and precision analog solutions, today
announced the ISL91127 and ISL91128 high efficiency
buck-boost regulators. The latest in Intersil’s industry-
leading buck-boost family, the new devices feature
4.5A switches, best-in-class efficiency up to 96%, and
a compact footprint ideal for providing system power or
powering the peripherals in battery-operated devices.
They offer the industry’s lowest quiescent current of
30µA for superior light load efficiency.
In hand-held device applications where the input voltage
may be higher or lower than the output voltage, buck-
boost regulators improve efficiency and provide longer
battery life compared to a boost regulator plus bypass
solution. With increasing demands for smaller and
smaller footprints, Intersil’s ISL9112x compact QFN and
WLCSP packages enable power designs that maximize
efficiency while providing flexibility and ease of design.
The ISL91127 and ISL91128 operate in buck, boost or
buck-boost mode, depending on the relation between
input and output voltages, and provide smooth transitions
between modes to prevent noise and glitches. This
capability, combined with patented Intersil technology
for delivering superior light load efficiency with ultra-
low quiescent current, maximizes efficiency under all
conditions. This is essential to improve battery life by
reducing power drain and heat dissipation in portable
and mobile applications.
The new buck-boost regulators’ wide input voltage range
of 1.8V to 5.5V supports multiple battery topologies, and
their wide output voltage range of 1V to 5.2V combined
with 3A output current provide the ultimate in design
flexibility. The ISL91128 also features I2C programmable
dynamic output voltage adjustability, which eliminates
feedback resistors and allows the reuse of the same
design for multiple output voltage needs.
“Hand-held device designers are constantly challenged
to create smaller, more efficient products whether it is
the latest wearable, a portable medical device or next-
generation smartphone,” said Andy Cowell, senior vice
president of Mobile Power Products at Intersil. “Intersil
specializes in providing the most efficient power delivery
with excellent transient response. Our latest buck-
boost regulators leverage generations of experience
in the most demanding mobile applications to provide
customers with extended battery life in a compact, easy-
to-use package.”
Key Features and Specifications of ISL91127 and
ISL91128 • 30uA typical quiescent current: the lowest
of any high current buck-boost in the industry
• Up to 96% efficiency (PVIN = 3.6V, Vout = 3.4V~4V,
Iout = 200mA)
• Output current up to 3A in boost mode (PVIN = 3V,
Vout = 3.3V)
• Input voltage can range from 1.8 to 5.5V, output
voltage can be adjustable or fixed at 3.3V • Full
protection for under-voltage, short-circuit, and thermal
faults to ensure safe operating conditions and reliable
system operation
• ISL91128 offers I2C dynamic voltage adjustability
for output voltage, and ringing suppression for superior
EMI performance
The ISL91127 and ISL91128 can be combined with the
ISL9003A, ISL9016, ISL9021A, and ISL9001A LDOs to
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