NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED
the full datasheet, please visit
www.intersil.com/products/isl91106
To request
REPLACEMENT PART
ISL91107
DATA SHORT
FN8679
Rev 2.00
November 20, 2015
ISL91106, ISL91106A
High Efficiency High Current Buck-Boost Regulator with Bypass Mode
The
ISL91106
and
ISL91106A
are highly integrated buck-
boost switching regulators that accept input voltages either
above or below the regulated output voltage. Unlike other
buck-boost regulators, these regulators automatically
transitions between operating modes without significant
output disturbance. The devices also include a selectable
bypass mode for low power consumption in applications that
have a sleep or low-power mode.
These devices are capable of delivering up to 2A of output
current (PVIN = 2.8V, V
OUT
= 3.3V) and provide excellent
efficiency due to their fully synchronous 4-switch architecture.
No load quiescent current of only 45µA also optimizes
efficiency under light-load conditions.
The ISL91106 and ISL91106A are designed for stand-alone
applications. They support 3.3V and 3.4V fixed output voltages
or variable output voltages with an external resistor divider.
Output voltages as low as 1V or as high as 5.2V are supported
using an external resistor divider.
The ISL91106 and ISL91106A require only a single inductor
and very few external components. Power supply solution size
is minimized by a 2.15mmx1.51mm WLCSP and a 2.5MHz
switching frequency, which further reduces the size of external
components.
Features
• ISL91106 with 3.8A switches
• ISL91106A with 4.2A switches
• Accepts input voltages above or below regulated output
voltage
• Automatic and seamless transitions between buck and
boost modes
• Input voltage range: 1.8V to 5.5V
• Output current (PVIN = 2.8V, V
OUT
= 3.3V):
- 2.1A (ISL91106A)
- 2A (ISL91106)
• High efficiency: up to 96%
• 45µA quiescent current maximizes light load efficiency
• 2.5MHz switching frequency minimizes external component
size
• Selectable forced PWM mode
• Selectable bypass power saving mode
• Fully protected for over-temperature, overcurrent and
undervoltage
• Small 2.15mmx1.51mm WLCSP
Related Literature
• AN1959, “ISL91106IIx-EVZ, ISL91106AIIx -EVZ Evaluation
Board User Guide”
Applications
• Smartphones and tablet PCs
• Wireless communication devices
• 2G/3G/4G power amplifiers
V
IN
=
1.8V to 5.5V
C
1
10µF
ISL91106IINZ,
ISL91106AIINZ
100
PVIN
LX1
L
1
1µH
V
OUT
= 3.3V
EFFICIENCY (%)
V
IN
= 3.8V
95
90
85
80
75
70
V
IN
= 4.2V
V
IN
= 3.3V
VIN
LX2
MODE1 VOUT
MODE2
FB
C
2
2x22µF
MODE1 MODE2
0
0
1
1
0
1
0
1
MODE
Disable
Bypass
EN, PWM
EN, Auto
GND PGND
V
IN
= 2.5V
1
10
100
LOAD CURRENT (mA)
1000
FIGURE 1. TYPICAL APPLICATION ISL91106IINZ, ISL91106IIQZ OR
ISL91106IIAZ, ISL91106AIIAZ
FIGURE 2. EFFICIENCY vs OUTPUT CURRENT (V
OUT
= 3.3V)
FN8679 Rev 2.00
November 20, 2015
Page 1 of 2
ISL91106, ISL91106A
© Copyright Intersil Americas LLC 2014-2015. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see
www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at
www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see
www.intersil.com
FN8679 Rev 2.00
November 20, 2015
Page 2 of 2
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