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ISL9120IIAZ-T7A

Description
Compact High Efficiency Low Power Buck-Boost Regulator; TQFN12, WLCSP9; Temp Range: -40° to 85°C
CategoryPower/power management    The power supply circuit   
File Size678KB,13 Pages
ManufacturerRenesas Electronics Corporation
Websitehttps://www.renesas.com/
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ISL9120IIAZ-T7A Overview

Compact High Efficiency Low Power Buck-Boost Regulator; TQFN12, WLCSP9; Temp Range: -40° to 85°C

ISL9120IIAZ-T7A Parametric

Parameter NameAttribute value
Brand NameIntersil
MakerRenesas Electronics Corporation
Parts packaging codeTQFN, WLCSP
package instruction,
Contacts12, 9
Reach Compliance Codecompliant
Factory Lead Time10 weeks
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum time at peak reflow temperatureNOT SPECIFIED
Base Number Matches1
DATASHEET
ISL9120IR
Compact High Efficiency Low Power Buck-Boost Regulator
The
ISL9120IR
is a highly integrated buck-boost switching
regulator that accepts input voltages either above or below the
regulated output voltage. This regulator automatically
transitions between buck and boost modes without significant
output disturbance. The ISL9120IR also has automatic bypass
functionality for when the input voltage is generally within 1%
to 2% of the output voltage, there will be a direct bypass
connection between the VIN and VOUT pins. In addition to the
automatic bypass functionality, the ISL9120IR also has a
forced bypass functionality with the use of the BYPS pin.
This device is capable of delivering up to 800mA of output
current (V
IN
= 2.5V, V
OUT
= 3.3V) and provides excellent
efficiency due to its adaptive current limit pulse frequency
modulation (PFM) control architecture.
The ISL9120IR is designed for stand-alone applications and
supports a 3.3V fixed output voltage or variable output
voltages with an external resistor divider. The forced bypass
power saving mode can be chosen if voltage regulation is not
required. The device consumes less than 3.5µA of current over
the operating temperature range in the forced bypass mode.
The ISL9120IR requires only a single inductor and very few
external components. Power supply solution size is minimized
by a 3mmx3mm 12 Ld TQFN package.
FN8743
Rev 1.00
February 2, 2016
Features
• Accepts input voltages above or below regulated output
voltage
• Automatic bypass mode functionality
• Automatic and seamless transitions between buck and
boost modes
• Input voltage range: 1.8V to 5.5V
• Selectable forced bypass power saving mode
• Adaptive multilevel current limit scheme to optimize
efficiency at low and high currents
• Output current: up to 800mA (V
IN
= 2.5V, V
OUT
= 3.3V)
• High efficiency: up to 98%
• 41µA quiescent current maximizes light-load efficiency
• Fully protected for over-temperature and undervoltage
• Small 3mmx3mm 12 Ld TQFN package
Applications
• Smartphones and tablets
• Portable consumer and wearable devices
V
IN
=
1.8V TO 5.5V
C
1
10µF
ENABLE
DISABLE
BYPASS
BUCK-BOOST
100
ISL9120IRNZ
VIN
95
V
IN
= 3.6V
LX1
EN
BYPS
LX2
VOUT
FB
PGND
EFFICIENCY (%)
L
1
1µH
90
V
IN
= 4V
85
V
IN
= 3.4V
80
75
70
V
IN
= 2.5V
V
IN
= 3V
V
OUT
= 3.3V
C
2
22µF or 47µF
GND
1
10
100
OUTPUT CURRENT (mA)
1000
FIGURE 1. TYPICAL FIXED OUTPUT APPLICATION
FIGURE 2. EFFICIENCY: V
OUT
= 3.3V, T
A
= +25°C
FN8743 Rev 1.00
February 2, 2016
Page 1 of 13

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Reach Compliance Code compliant compliant compliant -
Base Number Matches 1 1 1 -
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